WO2005013811A1 - 医療装置、医療装置誘導システム、カプセル型医療装置及びカプセル型医療装置誘導装置 - Google Patents
医療装置、医療装置誘導システム、カプセル型医療装置及びカプセル型医療装置誘導装置 Download PDFInfo
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- WO2005013811A1 WO2005013811A1 PCT/JP2004/011628 JP2004011628W WO2005013811A1 WO 2005013811 A1 WO2005013811 A1 WO 2005013811A1 JP 2004011628 W JP2004011628 W JP 2004011628W WO 2005013811 A1 WO2005013811 A1 WO 2005013811A1
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- Prior art keywords
- medical device
- magnetic field
- capsule
- main body
- rotating magnetic
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
- A61B1/041—Capsule endoscopes for imaging
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00147—Holding or positioning arrangements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00147—Holding or positioning arrangements
- A61B1/00158—Holding or positioning arrangements using magnetic field
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
- A61B34/70—Manipulators specially adapted for use in surgery
- A61B34/73—Manipulators for magnetic surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/07—Endoradiosondes
- A61B5/073—Intestinal transmitters
Definitions
- Medical device Medical device, medical device guidance system, capsule type medical device and capse type medical device guidance device
- the present invention relates to a medical device inserted into a body cavity, a medical device guiding system suitable for propelling and guiding a medical device while rotating, a capsule medical device, and a capsule.
- Japanese Patent Publication No. 2001-179700 and Japanese Patent Publication No. 2002-187071 As a conventional technique for propelling the inside of a subject with a rotating magnetic field, there are Japanese Patent Publication No. 2001-179700 and Japanese Patent Publication No. 2002-187071. These prior arts include a magnetic field generator that generates a rotating magnetic field, a robot body that receives the rotating magnetic field and rotates to obtain thrust, a position detector that detects the position of the robot body, A movable micromachine provided with a magnetic field changing means for changing the direction of the rotating magnetic field by the magnetic field generating unit so as to direct the robot main body to the destination based on the position of the robot main body detected by the position detection unit. A movement control system has been disclosed.
- the guide may not be guided as desired.
- the above-mentioned prior art is of a type in which advancing is performed while forming a hole with a drill, and cannot be applied to advancing along a lumen in a luminal organ such as an esophagus in a body cavity.
- the present invention has been made in view of the above points, and is a medical device to be inserted into a body cavity.
- a medical device capable of improving the passing function of the medical device and a guidance suitable for smoothly passing the medical device can be performed. It is an object of the present invention to provide a device and a capsule medical device guiding device.
- the present invention provides a medical device, a medical device guiding system, a capsule medical device, and a capsule medical device guiding system that can be guided to a target portion side in a short time along a hollow organ by rotating.
- the purpose is to:
- Still another object of the present invention is to provide a medical device, a medical device guiding system, a capsule medical device, and a capsule medical device guiding system that can smoothly propell even in the case of a bent luminal organ. I do. Disclosure of the invention
- the medical device of the present invention is a medical device having an insertion portion to be introduced into a body cavity, comprising a couple generating means for generating a couple having an action line parallel to the insertion axis.
- the medical device of the present invention includes a medical device having an insertion portion inserted into a body cavity having a substantially cylindrical outer shape, a helical structure provided on a side surface of the medical device main body, and a helical structure.
- the medical device guidance system of the present invention includes: a rotating magnetic field; a magnetic field generating device that generates a magnetic field in a direction perpendicular to a plane of rotation of the rotating magnetic field; a medical device main body having an insertion portion inserted into a body cavity; A thrust generating structure provided in the medical device main body; and a magnet provided in the medical device main body and arranged with the magnetic pole direction oriented in a direction substantially orthogonal to the thrust generating direction of the thrust generating structure. ing.
- the medical device guidance system of the present invention includes: a magnetic field generating device that generates a rotating magnetic field; a medical device main body having an insertion portion inserted into a body cavity; a thrust generating structure provided in the medical device main body; A center-of-gravity position changing mechanism for moving the center of gravity of the medical device with respect to the insertion axis of the medical device, the mechanism being provided on the device main body; To the magnetic pole direction. And a transmitting means for transmitting a control signal for controlling the center-of-gravity position changing mechanism to the medical device main body.
- the capsule medical device of the present invention includes: a capsule medical device main body having an insertion portion to be inserted into a body cavity; a thrust generating structure provided in the medical device main body; and a thrust generating member provided in the medical device main body. And a magnet disposed in the vicinity of the center of the capsule medical device body in the thrust generation direction, with the magnetic pole direction oriented in a direction substantially orthogonal to the thrust generation direction of the generation structure.
- the capsule medical device of the present invention includes: a capsule medical device main body having an insertion portion to be inserted into a body cavity; a thrust generating structure provided in the medical device main body; and a thrust generating member provided in the medical device main body. And a magnet disposed in the vicinity of an end of the main body of the capsule medical device in the thrust generation direction, with the magnetic pole direction oriented in a direction substantially perpendicular to the thrust generation direction of the generation structure.
- the medical device of the present invention performs a medical action such as an examination or a treatment inside a luminal organ of a subject
- the main body is constituted by a rotationally symmetric body having a symmetric axis in a traveling direction.
- At least one of the front part and the rear part in the traveling direction is constituted by a reduced diameter part having a diameter decreasing toward the end and having a substantially spherical end shape, and is adapted to the rotation of the electromagnetic field applied from outside the subject into the main body.
- An electromagnetic field responsive part to be actuated, a helical structure on the outer surface of the main body for converting the rotational motion by the electromagnetic field responsive part into a propulsion force, such that an end of the helical structure reaches near an end of the main body. is set up.
- the medical device of the present invention performs a medical operation such as an examination or treatment in a luminal organ of a subject, and the body has a substantially cylindrical portion and the diameter at both ends of the body is reduced in the direction of the end.
- a reduced diameter portion having a substantially spherical end shape, and a magnet which is magnetically acted on by a rotating magnetic field applied from the outside of the subject inside the main body, and a rotational movement by the magnet is provided on the outer surface of the main body.
- a helical structure for converting the helical force into a propulsion force is provided on both the substantially cylindrical portion of the main body and the reduced diameter portion.
- the medical device guidance system of the present invention performs a medical action such as an examination or a treatment in a luminal organ of a subject, and the main body is formed of a rotationally symmetric body having a traveling direction as a symmetric axis. At least one of the front part and the rear part in the traveling direction is constituted by a reduced diameter part having a diameter decreasing toward the end and having a substantially spherical end shape.
- An electromagnetic field responsive part that is acted on by rotation of the applied electromagnetic field; a helical structure on the outer surface of the main body for converting a rotational motion by the electromagnetic field responsive part into propulsion; and an end of the helical structure.
- a medical device installed so as to reach the vicinity of the end of the main body, an electromagnetic field generating means for generating an electromagnetic field acting on an electromagnetic field response unit provided in the medical device, and controlling the direction of the electromagnetic field by the electromagnetic field generating means And an electromagnetic field control unit.
- the electromagnetic field generation unit generates an electromagnetic field in three axial directions, and rotates the medical device in a luminal organ.
- the medical device guiding system of the present invention performs a medical operation such as an examination or a treatment inside a luminal organ of a subject, and the diameter of the main body is substantially cylindrical and both ends of the main body are narrow in the direction of the end. And a reduced-diameter portion having a substantially spherical end shape, and a magnet that is magnetically acted on by a rotating magnetic field applied from outside the subject inside the main body, and a rotational motion by the magnet is provided on the outer surface of the main body.
- a medical device provided on both the substantially cylindrical portion and the reduced diameter portion of the main body, and an electromagnetic field provided on the medical device.
- An electromagnetic field generating means for generating an electromagnetic field acting on a response unit; and an electromagnetic field control means for controlling a direction of the electromagnetic field by the electromagnetic field generating means.
- the electromagnetic field generating means generates an electromagnetic field in three axial directions, Place the lumen Rotate inside the organ.
- FIG. 1 is a schematic configuration diagram of a capsule medical device guidance system including the first embodiment of the present invention, particularly focusing on a rotating magnetic field generator.
- FIG. 2 is a block diagram showing an internal configuration of each unit in the capsule medical device guidance system including the first embodiment of the present invention.
- Figure 3 (A) is a side view of the capsule body.
- Fig. 3 (B) is a front view of the capsule body.
- FIG. 4A is an explanatory diagram showing the configuration of the operation input device.
- FIG. 4 (B) is a diagram showing an image display screen displaying information corresponding to the operation of the operation input device shown in FIG. 4 (A).
- FIG. 5 is an explanatory diagram showing how the rotating magnetic field changes when a rotating magnetic field is applied.
- FIGS. 6 (A) and 6 (B) are schematic diagrams showing the state of a couple received by the capsule medical device when an oscillating magnetic field is applied.
- FIGS. 7 (A) and 7 (B) are diagrams showing the trajectory drawn by the tip of the capsule medical device when the frequency and strength of the rotating magnetic field and the oscillating magnetic field are changed.
- FIG. 8 (A) is a diagram showing a trajectory when the frequency of the rotating magnetic field is equal to the frequency of the oscillating magnetic field.
- FIG. 8 (B) is a diagram showing a trajectory drawn by the tip of the force-pussel type medical device when the frequency of the oscillating magnetic field is doubled with respect to the frequency of the rotating magnetic field.
- FIG. 8 (C) is a diagram showing the trajectory drawn by the tip of the capsule medical device when the oscillating magnetic field is DC.
- FIGS. 9 (A), 9 (B) and 9 (C) are diagrams showing measurement results of propulsion speed when a rotating magnetic field and an oscillating magnetic field are applied using a sample.
- FIGS. 10 (A), 10 (B), 10 (C) and 10 (D) are explanatory diagrams of the operation when propelling a bent luminal organ or a wide luminal organ.
- FIG. 11 is an explanatory diagram of a case where a rotating magnetic field or the like is applied in a coordinate system in which the center axis of the capsule medical device is set in the ⁇ ′ direction.
- FIG. 12 is an explanatory diagram of the calculation of the direction of the capsule and the direction of the rotating magnetic field when a direction input for changing the direction of the capsule medical device is instructed.
- FIG. 13 is an explanatory diagram showing a new orientation of the capsule medical device in a polar coordinate system.
- FIG. 14 is a layout diagram of the internal structure of the capsule medical device.
- Fig. 18 (A) and Fig. 18 (B) are explanatory diagrams of the difference in the movement when guiding when the magnet is placed near the center and near the end of the capsule medical device body. .
- FIG. 21 (B) is a diagram showing a capsule endoscope provided with a flexible tube at one end.
- FIG. 23 is a block diagram showing a more detailed configuration of FIG.
- FIG. 24 is a schematic configuration diagram showing a schematic configuration of a magnetic field generator.
- FIG. 26 is a cross-sectional view showing the internal structure of the capsule medical device.
- FIG. 27 is a side view showing a water tank in which a sample capsule is inserted into a silicon tube for measuring a propulsion speed by applying a rotating magnetic field.
- FIG. 28 is a diagram showing a first sample in which spiral projections are provided at end portions.
- FIGS. 29 (A) and 29 (B) are graphs showing measurement results of propulsion speed.
- FIGS. 30 (A) and 30 (B) are explanatory views showing the operation when propelling in a bent conduit.
- FIG. 32 is a side view showing a capsule medical device of a first modified example.
- FIG. 33 is a side view showing a capsule medical device according to a second modification.
- FIG. 36 (B) is a diagram showing an image acquired from the capsule medical device shown in FIG. 36 (A).
- FIG. 37 is a side view showing a configuration of a capsule medical device of a modified example with a part cut away.
- FIGS. 1 to 18 relate to the first embodiment of the present invention
- FIGS. 1 and 2 show the overall configuration of a capsule medical device guidance system according to the first embodiment
- FIG. 3 is a capsule body
- 4A and 4B show the configuration of the operation input device and an image display screen that displays information corresponding to the operation
- FIG. 5 shows the image display screen when a rotating magnetic field is applied.
- Figure 6 shows how the rotating magnetic field changes
- Fig. 6 shows how the couple receives a capsule medical device when an oscillating magnetic field is applied
- Fig. 7 shows how the frequency and intensity of the rotating magnetic field and the oscillating magnetic field are changed.
- FIG. 8 (A) shows the trajectory drawn by the tip of the capsule-type medical device in the case where the frequency of the rotating magnetic field and the frequency of the oscillating magnetic field are equal
- Fig. 8 (B) shows the trajectory of the rotating magnetic field.
- Fig. 8 (C) shows the trajectory drawn by the tip of the capsule medical device when the oscillating magnetic field is DC
- Fig. 9 shows the trajectory drawn by the sample using the rotating magnetic field and vibration.
- Fig. 10 shows the measurement results of the propulsion speed when a magnetic field is applied
- Fig. 10 shows the operation explanatory diagram when propelling inside a bent or wide lumen organ
- Fig. 11 shows a capsule medical device.
- Fig. 10 shows the measurement results of the propulsion speed when a magnetic field is applied
- Fig. 10 shows the operation explanatory diagram when propelling inside a bent or wide lumen organ
- Fig. 11 shows a capsule medical device
- FIG. 12 is an explanatory diagram when a rotating magnetic field or the like is applied in a coordinate system in which the center axis of the capsule medical device is set in the x 'direction, and Fig. 12 shows a case where a direction input to change the direction of the capsule medical device is instructed.
- Fig. 13 shows an illustration of the calculation of the capsule orientation and the direction of the rotating magnetic field.
- Fig. 13 shows an illustration showing the new orientation of the capsule medical device in an absolute coordinate system.
- Fig. 14 shows the interior of the capsule medical device.
- Fig. 15 shows the layout of the structure.
- Fig. 16 shows a layout diagram of a modified example in which the net is placed on the rear end side, Fig.
- FIG. 16 shows a layout diagram of a modified example in which the magnets are placed on the observation window side in Fig. 14, and Fig. 17 An explanatory diagram of the operation when an oscillating magnetic field is applied to the arrangement of Fig. 15 is shown.
- Fig. 18 shows the guidance when the magnets are arranged near the center and near the end of the capsule medical device body. This shows the difference in exercise performed.
- a capsule medical device guidance system 1 As shown in FIGS. 1 and 2, a capsule medical device guidance system 1 according to a first embodiment of the medical device guidance system of the present invention is inserted (introduced) into a body cavity of a patient (not shown).
- Capsule medical device that functions as a capsule endoscope for imaging inside A device 3 (hereinafter abbreviated as a capsule), a magnetic field generating device 4 disposed around the patient, that is, outside the body, and applying a rotating magnetic field and a couple generating magnetic field (or oscillating magnetic field) to the force capsule 3;
- a magnetic field control device (or power supply control device) 5 for controlling the supply of a drive current for generating a rotating magnetic field and a couple generation magnetic field (or an oscillating magnetic field) in the magnetic field generating device 4; a capsule 3 disposed outside the patient's body;
- the magnetic field control device 5 is controlled according to the operation of the operator, and the direction of the rotating magnetic field and the couple generating magnetic field (or
- a processing device 6 composed of a personal computer or the like for performing processing for controlling the size, etc .; a display device 7 connected to the processing device 6 for displaying images captured by the capsule 3; Continued, An operation input unit 8 for instructing and inputting an instruction signal corresponding to the operation by an operator such as an operator.
- the operation input unit 8 includes a direction input device 8a for inputting a direction in which the capsule 3 inserted into the body is to be propelled, and a rotation of a rotation frequency corresponding to the operation.
- Rotary frequency input device 8b that generates a magnetic field instruction signal 8b
- rotating magnetic field strength adjusting device 8c that adjusts and controls the rotating magnetic field strength
- vibration (or couple generation) magnetic field strength adjusting device 8d vibration (even (For generating force)
- Frequency adjusting device 8 e for magnetic field for magnetic field
- direction input device 8 a Provided, for example, at the top of a joystick 9 that constitutes a device, and vibration (or for couple generation) for turning on / off the application of magnetic field ( Or for couple generation) ON / OFF switch (abbreviated as vibration switch) 8 f.
- an oscillating (for couple generation) magnetic field is (almost) described as an oscillating magnetic field.
- the capsule 3 is formed into a substantially cylindrical or capsule shape, and a thrust generating structure for converting rotation into thrust (propulsion) is provided on the outer peripheral surface of the outer container 11 which also serves as an insertion part into the body.
- the spiral projection (or screw portion) 12 is spirally provided.
- the spiral projection 12 has a cross-sectional structure such as a substantially hemispherical shape in which the outer peripheral surface of the outer container 11 is rounded so as to smoothly contact the inner wall surface in the body.
- an imaging means including an objective lens 13 and an imaging element 14 arranged at an image forming position thereof is housed in the interior sealed by the outer container 11.
- an illumination element 15 (see FIG. 2) for illuminating necessary for imaging is provided in the outer container 11.
- a gnet (permanent magnet) 16 used to promote the capsule 3 more smoothly is stored.
- the objective lens 13 is arranged so that its optical axis coincides with the central axis C which can be said to be the insertion axis in the cylindrical capsule 3, for example, the outer case. It is arranged inside the transparent top cover 11a of hemisphere in the container 11, and the central part of the front cover 11a becomes the observation window 17 as shown in FIG. 3 (B).
- the illumination element 15 is disposed around the objective lens 13.
- the visual field direction of the objective lens 13 is the optical axis direction of the objective lens 13, that is, the direction along the cylindrical central axis C of the capsule 3.
- the magnet 16 arranged near the center in the longitudinal direction in the capsule 3 has an N pole and an S pole in a direction orthogonal to the central axis C as shown in FIGS. 3 (A) and 3 (B). It is arranged to be formed.
- the center of the magnet 16 is arranged so as to coincide with the position of the center of gravity of the capsule 3, and the center of the magnetic force acting on the magnet 16 when an external magnetic field is applied is the center of the capsule 3. It is located at the center of gravity, and magnetically facilitates smooth propulsion of capsule 3.
- the magnets 16 are arranged so that the direction of magnetization, that is, the direction of the dipole, matches the specific arrangement direction of the image sensor 14.
- the upward direction when the image captured by the image sensor 14 is displayed is set to the direction from the south pole to the north pole of the magnet 16.
- the magnet 16 is magnetically rotated by applying a rotating magnetic field to the capsule 3 by the magnetic field generator 4, and the capsule 3 in which the magnet 16 is fixed is rotated together with the magnet 16.
- the spiral projections 12 'provided on the outer peripheral surface of the capsule 3 are rotated in contact with the inner wall of the body cavity, so that the capsule 3 can be propelled.
- the basic function (action) is schematically shown (by performing an operation of turning on the vibration switch 8f).
- the oscillating magnetic field (magnetic field for couple generation) H m in which the direction of the magnetic field changes in the direction of the central axis C of the capsule 3 by the generator 4 can be applied to the capsule 3.
- an equal force i.e., couple force
- couple force can be applied to the magnet 16 built in the cylinder in the direction opposite to the center axis C and in the opposite direction.
- the couple is parallel to the center axis C at the respective positions of the magnetic poles on the line connecting both magnetic poles of the magnet 16, the magnitudes of the forces are equal, and their directions are opposite to each other, and the capsule 3 is rotated. Acts to let.
- a couple acts on the magnet 16 by an external magnetic field.
- the capsule 3 is inserted in the longitudinal direction.
- the structure of a tilting (swinging) mechanism or a pseudo couple generating means that changes the position of the center of gravity may be employed so that the direction of the shaft is oscillated or tilted (while the couple is formed). May be generated or actuated.
- the direction of the upward direction of the image captured by the capsule 3 is the direction from the direction of the external magnetic field. To be able to know.
- the image pickup device 14 In the capsule 3, in addition to the objective lens 13 described above, the image pickup device 14, the illumination device 15 and the magnet 16, as shown in FIG. 2, signal processing for signals picked up by the image pickup device 14 is performed.
- Signal processing circuit 20 a memory 21 that temporarily stores the digital video signal generated by the signal processing circuit 20, and a signal that wirelessly modulates the video signal read from the memory 21 with a high-frequency signal and transmits the signal.
- a battery 24 for supplying power for operation to the internal electric system is housed.
- the processing device 6 that performs wireless communication with the capsule 3 includes a wireless circuit 25 that performs wireless communication with the wireless circuit 22, and a wireless circuit 25 that is connected to the wireless circuit 25 and performs image processing on the image data transmitted from the capsule 3.
- a data processing circuit 26 for performing data processing such as display; a control circuit 27 for controlling the data processing circuit 26 and the power control device 5; and a rotating magnetic field generator via the power control device 5
- a storage circuit 28 for storing information on the state of the rotating magnetic field generated by the device 4 and information on settings made by the direction input device 8a and the like.
- a display device 7 is connected to the data processing circuit 26, and an image or the like that is captured by the image sensor 14 and processed by the data processing circuit 26 via the wireless circuits 22 and 25 is displayed.
- An instruction signal corresponding to an operation is input to the control circuit 27 from a direction input device 8a, a rotation frequency input device 8b, and the like constituting the operation input device 8, and the control circuit 27 corresponds to the instruction signal. Perform the control operation.
- control circuit 27 is connected to a storage circuit 28, and constantly stores information on the direction of the rotating magnetic field and the direction of the magnetic field generated by the magnetic field generation device 4 via the magnetic field control device 5 in the storage circuit 28. I am trying to do it. After that, even if an operation to change the direction of the rotating magnetic field is performed, the direction of the rotating magnetic field and the direction of the magnetic field are continuously changed so that the change can be made smoothly. ing.
- the storage circuit 28 may be provided inside the control circuit 27.
- the magnetic field control device 5 connected to the control circuit 27 generates an AC current and controls an AC current generation & control unit 3 including three AC current generation & control circuits for controlling its frequency and phase. 1 and a driver section 32 composed of three drivers for amplifying each AC current.
- the output currents of the three drivers output three electromagnets 3 3 a and 3 constituting the magnetic field generator 4. 3b and 33c respectively.
- the electromagnets 33a, 33b, and 33c are arranged to generate magnetic fields in three orthogonal axes.
- the magnetic field generator 4 include a three-axis Helmholtz coil in which 33 a, 33 b, and 33 c are Helmholtz coils, respectively, and the magnetic field generation directions are orthogonal to each other.
- an instruction signal of the magnetic field direction is generated, and the operation is performed by operating the rotation frequency input device 8b.
- the couple 16 is capable of generating a couple with respect to the magnet 16 of the capsenolle 3 so as to rotate the center axis C itself around the center point of the center axis C in the longitudinal direction of the capsule 3.
- the capsule 3 is tilted or vibrated because the oscillating magnetic field (acting as a couple) is alternately or periodically applied so that the direction of the oscillating magnetic field (acting as a couple) is changed in the opposite direction before the center axis C itself is completely rotated. become.
- the direction input device 8a tilts the joystick 9 in the direction in which it is desired to advance, thereby generating a rotating magnetic field so as to move the capsule 3 in that direction.
- FIG. 5 shows, for example, a state in which a rotating magnetic field is applied.
- the magnet 16 built in the capsule 3 can be rotated.
- the capsule 3 can be moved forward or backward.
- a rotating magnetic field in which the direction of the pole of the rotating magnetic field changes is applied on a rotating magnetic field plane perpendicular to the direction of the central axis C in the longitudinal direction of the capsule 3 ( ⁇ ′ in FIG. 5),
- the capsule 3 is rotated around its longitudinal direction together with the magnet 16 fixed in a direction perpendicular to its longitudinal direction in the capsule 3, and the body cavity is formed by the spiral projection 12 shown in FIG. 3 according to the rotational direction. It can be moved forward or backward by engaging with the inner wall.
- an oscillating magnetic field (a couple generating magnetic field) acting to move (vibrate) the magnet 16 around the direction of the central axis C in the longitudinal direction in FIG. 5 can be applied to the capsule 3.
- the longitudinal direction can be changed (vibrated) from the state shown by the solid line to the state shown by the dotted line (the center axis direction is shown by y.z ').
- the capsule 3 is rotated about its longitudinal center axis C and is eccentric so that the direction of its center axis C is inclined.
- the rotating torque of the spinning top is reduced, and it is possible to perform a state in which the mandrel shakes due to the effect of gravity (this operation is called a jigling operation).
- the capsule 3 when the capsule 3 is advanced or retracted along the longitudinal direction of the lumen in a lumen having substantially the same diameter as the capsule 3, the capsule 3 By applying a rotating magnetic field that rotates the around its longitudinal direction, it can be moved smoothly.
- an oscillating magnetic field is applied along the central axis C in the longitudinal direction of the capsule 3 around the center of the capsule 3 and so as to apply a force to rotate the central axis C.
- This enables the capsule 3 to perform a jigling operation, and when the longitudinal direction during the jigling operation becomes a bending direction of the lumen, the force capsule 3 can be smoothly moved in that direction ( This is described later with reference to Fig. 10 (A)).
- the state of the capsule 3 or the state of the rotating magnetic field is constantly grasped by tilting the joystick 9 so that the direction of the rotating magnetic field can be controlled in a desired direction from the current traveling direction.
- the state of the rotating magnetic field (specifically, the direction of the rotating magnetic field and the direction of the magnetic field) is always stored in the storage circuit 28.
- an operation instruction signal in the operation input unit 8 in FIG. 2 is input to the control circuit 27, and the control circuit 27 sends a control signal for generating a rotating magnetic field corresponding to the instruction signal to the magnetic field control device 5.
- the information of the direction of the rotating magnetic field and the direction of the magnetic field is stored in the storage circuit 28.
- the storage circuit 28 always stores the information on the rotating magnetic field generated by the rotating magnetic field generator 4 and the direction of the periodically changing magnetic field forming the rotating magnetic field.
- the storage circuit 28 is not limited to storing information corresponding to the control signal of the direction of the rotating magnetic field and the direction of the magnetic field from the control circuit 27.
- the direction of the rotating magnetic field and the direction of the magnetic field that are actually output to the rotating magnetic field generator 4 via the AC current generation & control unit 31 and the driver unit 32 in the magnetic field controller 5 are determined by the control signal output to the magnetic field controller 5.
- the information to be transmitted may be sent from the magnetic field controller 5 to the control circuit 27 and stored in the storage circuit 28.
- the direction of the rotating magnetic field in other words, the direction of the traveling direction of the capsule
- a sudden force acts on the capsule 3.
- the rotating magnetic field is controlled so as to be continuously changed so as to operate smoothly without any change.
- the image picked up by the image pickup device 14 is also rotated by the rotation of the capsule 3, so if this is displayed on the display device 7 as it is, the displayed image is also a rotated image.
- the operability of the instruction operation in the desired direction by the direction input device 8b is reduced, so that it is desired to stop the rotation of the display image.
- the process of correcting a rotated image into an image with a still rotation is performed by the data processing circuit 26 and the control unit.
- the control circuit 27 is used.
- the image may be rotated based on the direction information of the magnetic field, and the rotation of the capsule 3 may be cancelled. (Also, a still image in a predetermined direction is displayed by performing correlation processing of the images and the like.) May be done).
- a still image captured by the image sensor 14 is displayed in a circular display area 7 b, and a joystick is displayed by an arrow 7 c.
- the operation amount is indicated by the operation direction 9 and the size of the arrow 7c.
- the display color of the arrow 7c indicates forward / reverse.
- the frequency of the rotating magnetic field is displayed in a rotating magnetic field frequency display area 7d, for example, at the lower corner of the display screen 7a.
- FIG. 6 (A) and 6 (B) show a state where an oscillating magnetic field Hm is applied.
- a couple that rotates the magnet 16 fixed inside the capsule 3 in the counterclockwise direction acts as the action line indicated by the arrow. This couple acts in a direction parallel to the central axis C of the capsule 3.
- the capsule 3 receives a force (couple) that is rotated by the oscillating magnetic field Hm in the direction shown by the two-dot chain line from the state shown by the solid line. Also, by generating an oscillating magnetic field Hm in the opposite direction to FIG. 6 (A), a couple that rotates the magnet 16 fixed inside the capsule 3 clockwise as shown in FIG. 6 (B). The force capsule 3 is rotated from the state shown by the solid line to the direction shown by the two-dot chain line.
- FIG. 7 (A) shows the tip surface of the capsule 3 in a state where the rotating magnetic field Hr and the oscillating magnetic field Hm are applied, where the relation between the frequency fr of the rotating magnetic field Hr and the frequency fm of the oscillating magnetic field Hm is fr ⁇ fm.
- the trajectory Tr (at the center of the capsule tip) when viewed from the side is shown.
- FIG. 7B shows the trajectory Tr of the capsule 3 in FIG. 7A when the intensity of the oscillating magnetic field Hm is further reduced to half the intensity of the rotating magnetic field Hr. Therefore, the swing angle from the center of rotation is half that of the case of Fig. 7 (A).
- the operation state (trajectory Tr) is such that the user swings eccentrically to the other side (left side in Fig. 8 (A)).
- the miracle Tr of the capsule 3 is As shown in Fig. 8 (C), the gyro turns at the same end as the frequency fr of the rotating magnetic field Hr.
- a container 31 is filled with water 32, and a capsule 3 is inserted into a silicon tube 33 on the bottom side thereof, thereby forming a conduit in a body cavity. Is set to simulate the state where the capsule 3 is inserted into the.
- the container 31 is placed in the rotating magnetic field generator 4 ⁇ shown in FIG. 1, and the rotating magnetic field generator 4 places the container 31 on the right side in the longitudinal direction (the left-right direction in FIG. 9A) of the silicon tube 33.
- a rotating magnetic field that moves forward (forward) and moves leftward (backward) is applied, and an oscillating magnetic field is applied with changing its frequency.
- the time when the capsule 3 moves 2 cm is measured, and the moving speed is measured.
- the frequency of the rotating magnetic field is 1 Hz
- the magnetic field strength is 100 Oe
- the oscillating magnetic field strength is 50 Oe
- the water level is 20 cm
- the angle of the spiral projection 12 of the capsule 3 is 4 Five.
- the one formed in Article 2 was adopted.
- the silicon tube 43 is tilted slightly downward to the right (that is, the left side is raised). In other words, the right side is forward (down), and the left side is reverse (up).
- the measurement results are as shown in FIG. 9 (B) for the case of reverse travel, and as shown in FIG. 9 (C) for the case of forward travel.
- the results in Figs. 9 (B) and 9 (C) are effective when the frequency of the oscillating magnetic field is higher than the frequency of the rotating magnetic field, particularly when moving backward and climbing. Further, under the conditions of the present embodiment, as the frequency of the oscillating magnetic field, approximately 2 to 10 Hz is data considered to be effective for the propulsion speed.
- the vibration frequency approximately 2 to 10 times the frequency of the rotating magnetic field is data that is considered to be effective for propulsion speed.
- the overall operation of the present embodiment will be described. Inspect the body cavity with Capsule 3: If swallowed, patient swallows Capsule 3.
- the capsule 3 inserted into the body cavity is illuminated by the illumination element 15 when passing through the esophagus and the like, and the image captured by the imaging element 14 is wirelessly transmitted to the processing unit 6 outside the body via the wireless circuit 22.
- the processing device 6 receives the demodulated image data by the wireless circuit 25 and accumulates the demodulated image data in an image storage device (such as a hard disk) provided in the data processing circuit 26 or the like.
- a display process is performed, and the image is output to the display device 7 and images sequentially captured by the capsule 3 are displayed.
- the operator can infer the approximate position of the capsule 3 in the current body cavity. For example, if it is determined that the esophagus is being imaged, and the region to be examined is deeper, for example, in the small intestine, it is better to advance the middle portion more quickly.
- the direction of the rotating magnetic field generated by the magnetic field generator 4 (the direction of the normal direction) is set to the lower side along the patient's height.
- the spiral protrusion 12 provided on the capsule 3 is formed in, for example, a right-handed screw shape with the direction of the visual field to be imaged by the imaging element 14 as the front side.
- the control circuit 27 activates the setting circuit 29 to display an initial setting screen on the display device 7 or the like so that the operator can select and set the direction of the rotating magnetic field generated in the initial setting. Then, the surgeon first performs an instruction operation for generating a rotating magnetic field in a downward direction along the patient's height, so that the initial generation information of the rotating magnetic field is stored in the storage circuit 28.
- the magnitude (amplitude) of the rotating magnetic field can be set in advance by the setting circuit 29, and the rotating magnetic field can be set so as not to generate a rotating magnetic field exceeding this value.
- the setting information from the setting circuit 29 is stored in the storage circuit 28.
- the lower side along the patient's height is rotated so that the rotating magnetic field is oriented.
- the control circuit 27 reads and controls the information stored in the storage circuit 28 so that a magnetic field is generated.
- the rotating magnetic field is generated by the rotating magnetic field generator 4 via the magnetic field controller 5 based on the information read from the storage circuit 28.
- the storage circuit 28 always stores information on the state of the rotating magnetic field (the direction of the rotating magnetic field and the direction of the magnetic field), and also stores the information on the state of the rotating magnetic field when the application of the rotating magnetic field is stopped. Then, when the operation of applying the rotating magnetic field is performed again, a rotating magnetic field similar to that when the rotating magnetic field is stopped is generated based on the information stored in the storage circuit 28. In this way, the capsule 3 can be propelled along the duct in the body cavity. For example, as shown in FIG. 10 (A), in the relatively narrow lumen 41, the bent portion 42 becomes narrower. When there is a bend, there is a case where it is difficult to efficiently advance along the bent portion 42 by simply using the rotating magnetic field.
- an oscillating magnetic field is applied together with a rotating magnetic field to further apply a couple to the capsule 3, thereby causing the capsule 3 to rotate around its longitudinal axis.
- the lumen portion of the bent portion 42 is pushed open by the swinging action, and the propulsion is performed in the bending direction of the bent portion 42 when the bent portion 42 is in the bent direction.
- FIG. 10 (B) shows the operation in the case where the lumen 41 wider than the outer diameter of the capsule 3 is efficiently propelled.
- FIG. 10 (B) when the capsule 3 is to be propelled in the lumen 41 wider than the outer diameter of the capsule 3, simply applying a rotating magnetic field to the capsule 3 results in FIG.
- FIG. 10 (C) or FIG. 10 (D) the outer peripheral surface of the capsule 3 (the helical projection 12 provided on the capsule 3) has a small portion of engagement with the inner surface of the lumen 41 (the hooked portion). It is easy to spin and the traveling speed tends to be slow.
- FIG. 10 (D) shows the state viewed from the direction of arrow A in FIG. 10 (C). When simply rotated, the posture does not change much, and the function of spinning and proceeding is reduced.
- the capsule 3 is caused to oscillate, thereby increasing the effective outer diameter of the capsule 3 in the oscillating operation state and the traveling direction.
- the engagement portion with the inner wall can be enlarged even in the case of a wide lumen 41, so that the propulsion can be performed efficiently.
- the lumen 4 having an inner diameter larger than the outer diameter of the capsule 3 is stably propelled, and the capsule 3 is efficiently propelled.
- the imaging range can be substantially widened by the jigling operation, and the inner wall of the lumen 41 can be imaged in a wider range.
- the operation direction of the joystick 9 and the like are displayed by arrows 7c as shown in FIG. 4B, and the direction in which the capsule 3 is advanced in the captured image is shown. Instructions can be given. Then, in response to this instruction direction, the magnetic field generation device 4 generates a rotating magnetic field that advances the capsule 3 in that direction.
- control circuit 27 performs a process of calculating the direction of generation of the rotating magnetic field, and the rotating magnetic field generator 4 generates the rotating magnetic field corresponding to the indicated direction via the magnetic field control circuit 5.
- the rotating magnetic field strength, the oscillating magnetic field strength, and the like depending on the time t input as described below are represented by H r (t), Hm (t), and the like.
- FIG. 11 shows a coordinate system ( ⁇ , y ′, ⁇ ′) in which the center axis direction of the capsule 3 is set to x ′.
- this coordinate system ( ⁇ ', y', ⁇ ') since the center axis direction of the capsule 3 is set to X', the capsule 3 is advanced in the direction of its center axis x ', and
- the magnetic field when the oscillating magnetic field is applied in the x 'direction is as follows.
- Hx '(t + T s) Hm (t) c os ( ⁇ (t) + 2 ⁇ T s f m (t))
- Hy '(t + T s) H r (t) c os (j3 (t) + 2 ⁇ T s f r (t))
- H z '(t + T s) H r (t) s i n (/ 3 (t) + 27cT s f r (t))
- Hy 'and Hz' are rotating magnetic fields, and ⁇ 'is an oscillating magnetic field.
- FIG. 12 is an explanatory diagram of calculation of a new direction of the capsule 3 when the direction instruction of the capsule 3 is input.
- the capsule pointing direction (the angle direction between the y 'axis and the angle ⁇ ) is changed with respect to the capsule 3 (the center axis direction is).
- the direction of the new ⁇ axis when the coordinate system is rotated about the rotation center axis ⁇ orthogonal to the capsule pointing direction is the direction of the rotating magnetic field.
- V (t) ((Vy / (t) 2 + (V ⁇ '(t) 2 ) 1/2
- the transformation matrix rotated around the rotation center axis p is ⁇ (using the rotation matrices R ′, R (t) 2 ′, R ⁇ ′ corresponding to the operations of (1), (2), and (3). ,
- the magnetic field generated by the 3-axis Helmholtz coil at time t is (Hx (t) Hy (t) Hz (t))
- FIG. 13 shows the orientation of the capsule 3 using (t) and ⁇ (t). Also, if the magnetic field side is converted from ⁇ ⁇ 'to this x, y, z coordinate system, at time t + T s
- Equation 3 «EI 13 corresponds to the rotation of the angle ⁇ (t) around the z axis and the angle ⁇ (t) around the y axis of ⁇ 13 corresponding to the rotation operation. Show the rotation matrix.
- the magnetic field generated from outside can be calculated.
- the magnetic field generated by a coil is
- 0 (t) and 0 (t) are used according to the detection result by the position detector.
- an AURORA manufactured by NDI or the like can be used as a position direction means (sensor).
- ⁇ May be defined as the direction of the capsule 3.
- FIG. 14 shows an internal layout of the capsule 3.
- an objective lens 13, an illumination element 15, and an imaging element 14 attached to the (objective lens frame 51) are arranged.
- a signal processing circuit 20 here, the memory 21 is stored
- a radio circuit 22 are arranged, and a magnet 16 is arranged behind the radio circuit 22. With the magnet 16 in between, the battery on the opposite side of the observation window 24 and a switch circuit 71 are arranged.
- Each unit is wired by a flexible board 56 as a wiring means, and constitutes a capsule medical device 3 which realizes the operation described above.
- the magnet 16 can be arranged at the center of the capsule medical device 3 main body. In this arrangement, the position of the magnet 16 is close to the position of the center of gravity of the capsule medical device 3. As a result, the rotational driving force and the like of the three capsule medical devices that are generated by applying a magnetic field from outside are generated near the center of gravity of the capsule medical device 3.
- Fig. 15 shows a modified force cell in which the magnet 16 and the battery 24 and the switch circuit 71 are replaced with the magnet 16 in Fig. 14 and the magnet 16 is arranged at the end opposite to the observation window. 3 '.
- This configuration is advantageous when guiding the inside of a relatively large lumen such as the large intestine.
- the magnet 16 has a hollow structure and is inserted into and fixed to the objective lens frame 51. With such a structure, the magnet 16 can be arranged near the end of the capsule 3 ′′ on the observation window side.
- Fig. 16 Differences in motion when the capsule 3 ⁇ is guided (turning motion) This will be described in comparison with capsule 3 in FIGS. 3 and 14.
- the direction is changed around the center of 3 (position of magnet 16). If the lumen runs sharply, there may be cases where it is difficult to ensure a radius for rotation along the lumen, and in this case, the inductivity may decrease.
- the capsule 3 ⁇ shown in Fig. 16 operates as follows.
- the capsule 3 or the like even when the lumen through which the capsule 3 or the like is to be passed is wider than the outer diameter of the capsule 3 or the like, or becomes narrow or bent, the capsule It is possible to smoothly pass through 3 etc., and it is possible to guide the capsule 3 etc. to the target site in a short time.
- the capsule 3 and the like can be moved in the lumen at a higher speed than in the conventional example, the capsule 3 and the like can be guided to the target site in a short time.
- FIG. 19 shows a capsule 3B according to the second embodiment of the present invention.
- FIG. 19 (A) shows the internal configuration of the capsule 3B
- FIG. 19 (B) shows the pager motor 57 viewed from the rear end.
- the capsule 3 has a magnet 16 built therein, and an externally applied rotating magnetic field and an oscillating magnetic field in a direction orthogonal to the rotating magnetic field are applied, so that the capsule 3 is passively encapsulated.
- a couple of forces acting to incline the center axis C of the capsule 3B is applied to the capsule 3B. It is intended to be.
- the capsule 3B shown in FIG. 19 has a spiral projection 12 on the outer peripheral surface of the capsule-shaped outer container 11, similarly to the capsule 3 of FIG. 3 (A). Further, an observation window 17 made of a transparent member is provided on the tip side of the outer container 11.
- a cylindrical lens frame 51 to which an objective lens 13 is attached is arranged inside the observation window 17 and an image pickup device to which an image pickup device 14 is attached at the image forming position.
- a substrate 52 is arranged, and a lighting element 15 is arranged around the lens frame 51.
- a control board 53 for performing signal processing and control and a communication board 54 having functions such as a radio circuit 22 are arranged adjacent to the imaging element board 52, and an antenna 55 is connected to the communication board 54. ing.
- the illumination element 15 and the imaging element substrates 5 and 2 are electrically connected by a flexible substrate 56.
- a magnet 16 is arranged at a central position on the longitudinal central axis C of the capsule 3B so that a direction perpendicular to the central axis C is a longitudinal direction, and an adhesive or the like not shown is used. Fixed.
- a battery 24 is housed adjacent to the magnet 16 and is connected to the flexible substrate 56 via a switch (not shown). Further, in a storage portion near the rear end of the capsule 3B adjacent to the battery 24, a pager motor 57 for eccentrically or oscillating the capsule 3B from the direction of the center axis C is stored. It is connected to a control board 53 and the like via a flexible board 56.
- the pager motor 57 includes, for example, an ultrasonic motor 58 and a weight 59 provided on the ultrasonic motor 58.
- a substantially conical or fan-shaped weight 59 is attached to the rotation shaft 58a of the ultrasonic motor 58, and the rotation of the ultrasonic motor 58 on the rotor side is performed together. Then, the weight 59 rotates, and a center-of-gravity position changing mechanism in which the position of the center of gravity changes according to the position of the weight 59 causes the capsule 3B to swing (vibrate) with the rotation of the weight 59.
- the capsule 3B has communication means for communicating with the extracorporeal processing device 6, as described in the first embodiment.
- the control circuit 27 in the processing device 6 controls the magnetic field generator 4 to generate an oscillating magnetic field.
- the control circuit 27 transmits the instruction signal to the capsule 3B via the wireless circuit 25.
- the capsule control circuit 23 When the capsule 3B receives the instruction signal and decodes the instruction, the capsule control circuit 23 (see FIG. 2, the control board 53 in FIG. 19) operates the pager motor 57. . Also, turn off the vibration switch 8f. Is performed, the capsule 3B stops the operation of the pager motor 57.
- the operation of the rotating magnetic field is similar to that of the first embodiment.
- the operation for rotating the capsule 3B is the same as in the first embodiment. Then, for example, when it is desired to propel the inside of the bent luminal organ more smoothly, the vibration switch 8 f provided on the operation input device 8 is pressed as shown in FIG. Then, the information of the vibration ON is transmitted to the wireless circuit 25 through the control circuit 27.
- the information of the vibration ON is transmitted to the capsule 3B by wireless communication.
- the capsule control circuit 23 of the capsule 3B receives this signal and turns ON the rotation of the pager motor 57.
- the capsule 3B actively tilts or moves the central axis C of the capsule 3B by a pseudo couple (that is, a force corresponding to one of the forces forming the couple). (Pseudo couple) is generated, and the capsule 3B can be vibrated or swung.
- a pseudo couple that is, a force corresponding to one of the forces forming the couple.
- the frequency of the vibration can be changed by setting the signal indicating the number of revolutions of the pager motor 57 by wireless communication.
- the capsule 3B can be vibrated or swung by a simple operation without applying an oscillating magnetic field from the outside.
- the capsule 3B may be propelled while being rotated by the peristaltic motion of a luminal organ in the body by the spiral projection 4 3B provided on the capsule 3B. Therefore, even in the case of a small-scale system configuration that does not use the magnetic field generator 4 that generates a rotating magnetic field, according to the present embodiment, it is possible to vibrate, and it is possible to make a smooth bending portion efficient.
- FIG. 20 shows a capsule 3C according to a third embodiment of the present invention
- FIG. 21 (A) shows an electromagnetic solenoid device portion
- FIG. 21 (B) shows a flexible tube at one end.
- the capsule endoscope provided with is shown.
- the capsule 3C shown in FIG. 20 is the same as the capsule 3B shown in FIG. 19 (A), except that an electromagnetic solenoid device 64 for electromagnetically moving the weight 66 instead of the pager motor 57 is incorporated. .
- a storage portion near the rear end of the force cell 3 C adjacent to the battery 24 has an electromagnetic source that enables the capsule 3 C to be magnetized in a direction perpendicular to the direction of the central axis C.
- An electromagnetic solenoid device 6 comprising a magnetic shield frame body 62 which incorporates a solenoid 61 and covers the magnetic shield from being affected by an external magnetic field, and an oscillator 63 which drives the electromagnetic solenoid 61. 4 are stored.
- the vibration ONZO FF signal due to the operation of the vibration switch 8 f of the external operation input device 8 is sent to the capsule 3 C, the signal is received and the control board 5 is received.
- the capsule control circuit 23 of 3 demodulates the ON / OFF signal and sends it to the oscillator 63 to oscillate the oscillator 63.
- the oscillator 63 generates a current for driving the electromagnetic solenoid 61 in a frequency range from DC to several tens of Hz.
- the driving condition of the oscillation frequency of the oscillator 63 may be preset or may be configured so that a frequency signal can be input in addition to the ON / OFF signal so that it can be externally controlled.
- the electromagnetic solenoid 61 When the output signal of the oscillator 63 is applied to the electromagnetic solenoid 61 as a drive signal, the electromagnetic solenoid 61 is magnetized (generates a magnetic field).
- a weight 66 composed of, for example, a magnet movably held by the guide member 65 according to the direction of magnetization of the electromagnetic solenoid 61 is connected to one end of the guide member 65 (FIG. 20).
- the weight 66 can be reciprocated in the axial direction of the guide member 65 against the elastic force of the panel 67 biasing upward (in FIG. 21A).
- the capsule 3C is caused to vibrate in the axial direction of the guide member 65.
- FIG. 21 (A) shows a more detailed structure of the electromagnetic solenoid device 64 in an enlarged manner.
- the electromagnetic solenoid 61 and the guide member 65 arranged in parallel with the electromagnetic solenoid 61 are connected and fixed by holding members 68a and 68b, respectively.
- a weight 66 provided with a hole through which the guide member 65 passes is attached to the guide member 65 so as to be movable in the axial direction of the guide member 65, and a coil disposed below the guide member 65 is provided.
- a weight panel 66 is urged upward by a panel-like panel 67.
- a stopper 69 is provided on the holding member 68b side, and the weight 66 is restricted from moving further below a predetermined position by the stopper 69.
- the pressing member 68a is formed of a non-magnetic material
- the pressing member 68b is formed of a magnetic material.
- the electromagnetic solenoid 61 is controlled by the capsule control circuit of the capsule 3C 3.
- the operation of the electromagnetic solenoid 61 can be controlled by the operation input device 9 of the treatment device 6 outside the body.
- a signal by an operation input from the operation input device 8 is transmitted to the capsule 3C through the wireless circuit 25 and transmitted to the capsule control circuit 23.
- the capsule control circuit 23 controls the electromagnetic solenoid 61 based on this signal.
- the weight 66 can be formed of a magnetic material without being formed of a magnet. That is, the operation of moving downward (ON) and moving (returning) upward by the elastic force of the panel 67 during OFF is repeated.
- a force for periodically swinging can be generated as in the case of driving with the output of the oscillator 63.
- the effect in this case is almost the same as in the case of the pager motor 57.
- the weight 66 is moved by the electromagnetic solenoid 61.
- the ultrasonic linear motor may be moved perpendicularly to the insertion axis direction of the capsule medical device.
- a weight may be added to the drive unit of the ultrasonic reduction motor.
- the capsule endoscope has been all described.
- the invention is not limited to the capsule endoscope.
- the same effect can be obtained by providing a rotary sliding portion at one end of the endoscope and a catheter-like guide.
- any of the vibration means described above may be provided inside the endoscope to vibrate the distal end of the endoscope.
- FIGS. 22 to 30 relate to the fourth embodiment of the present invention
- FIG. 22 is an overall configuration diagram showing a schematic configuration of a capsule medical device guiding system including the fourth embodiment of the present invention.
- FIG. 23 is a block diagram showing a more detailed configuration of FIG. 21;
- FIG. 24 is a schematic configuration diagram showing a schematic configuration of a magnetic field generator;
- FIG. 25 is a side view showing an external appearance of a capsule medical device;
- FIG. 26 is a cross-sectional view showing the internal configuration of FIG. 25, and
- FIG. 27 is a side view showing a water tank in which a sample capsule is inserted into a silicon tube ⁇ ⁇ in order to measure a propulsion speed by applying a rotating magnetic field.
- Fig. 8 shows a sample used for measurement with spiral projections at the ends
- Fig. 29 shows the measurement results of propulsion speed
- Fig. 30 explains the action when propelling in a bent pipe FIG.
- the capsule medical device guiding system (hereinafter abbreviated as capsule guiding system) 101 is shown in Fig. 1 in the body cavity of patient 102.
- a capsule-shaped medical device (hereinafter simply abbreviated as a capsule) 103 for examining the inside of a body cavity, placed outside of this patient 102, and radio waves with a capsenolle 103
- a power control device composed of a bathocon or the like that controls the operation of the capsule 103 and receives information transmitted from the capsule 3
- control device 104 and a magnetic field generator that controls the direction of the rotating magnetic field applied to the capsule 103 and guides the capsule 103 in the direction in which it is to be propelled.
- the crushing field generator 105 is formed of, for example, three electromagnets 105 a, 105 b, and 105 c, and an AC power supply supplied from an AC power supply 106. By controlling this, a rotating magnetic field can be generated in three axial directions.
- the magnetic field generator 1 Q5 is schematically illustrated by a (hollow cubic) three-axis Helmholtz coil formed in three-axis directions.
- a magnetic field generator 105 that generates a rotating magnetic field is arranged around the patient 102, and the AC furnace device 106 is controlled from the control device 104 side.
- the force acts in response to the magnetic field placed inside the capsule 103 inserted into the body lumen channel 0 of 02
- the direction in which the capsule 3 is propelled with respect to the magnet 108 (as the magnetic field responder)
- the capsule 103 can be propelled (guided) smoothly and efficiently.
- the direction of the rotating magnetic field generated by the magnetic field generator 105 can be controlled by operating the operation input device 9 connected to the control device 4.
- the control device 104 is composed of a personal computer body 111 having a function of controlling the capsule 103 and the magnetic field generator 105 (the AC power source 107).
- a keyboard 1 1 2 connected to the PC 1 1 1 to input commands, data, etc.
- a monitor 1 1 3 connected to the PC 1 1 1 and a display means for displaying images, etc.
- a PC 1 1 1 1 connected to the external antenna 1 1 4 for transmitting the control signal for controlling the capsule 103 and receiving the signal from the capsule 103 and the PC body 1 1 1 for controlling the capsule 103 and the direction of the rotating magnetic field
- an operation input device 109 for inputting the information.
- the controller 104 incorporates a CPU 115 as shown in FIG. 23, and the CPU 115 transmits a control signal for controlling the capsule 103 and the magnetic field generator 105 to the keyboard 1. It is generated based on the control program stored in the hard disk 1 16 (refer to FIG. 23) or the like in the PC 11 or the input from the operation input device 1 and the operation input device 109.
- a control signal for controlling the magnetic field generator 105 is transmitted from the personal computer 111 to the AC power supply 106 via the connection cable. And, based on the control signal To generate a rotating magnetic field. Due to the rotating magnetic field, the capsule 103 acts magnetically on a part of the magnet 108 by the rotating magnetic field generated by the magnetic field generator 105 to rotate the capsule 103, which will be described later. The propulsion is generated by the thrust generating structure.
- a control signal for controlling the capsule 103 is modulated by a carrier wave of a predetermined frequency via an oscillation circuit in the personal computer 111, and is oscillated as a radio wave from the external antenna 114. .
- the capsule 103 receives a radio wave with an antenna 127 described later, demodulates a control signal, and outputs the demodulated signal to each constituent circuit and the like.
- control device 104 receives an information (data) signal such as a video signal transmitted from the wireless antenna 127 of the capsule 103 by the extracorporeal antenna 114 and displays it on the monitor 113. It is supposed to.
- an objective optical system 121 for forming an optical image As shown in FIG. 23, inside the capsule 103, an objective optical system 121 for forming an optical image, an image pickup device 122 arranged at the image forming position, and an objective optical system 122 are arranged.
- a signal processing circuit 124 that performs signal processing for signals captured by the imaging element 122, and signal processing
- a memory 125 temporarily storing the digital video signal generated by the circuit 124, and a video signal read from the memory 125 is modulated by a high-frequency signal and converted into a signal to be transmitted wirelessly.
- Capsule control circuit 1 2 8 and signal processing circuit 1 2 4 etc. Supply power for operation to the electrical system inside the capsule 103 , Batteries 1 and 9 are stored.
- the computer main body 111 constituting the control device 104 performing wireless communication with the capsule 103 is connected to the external antenna 114, and the wireless circuit 126 (on the capsule 103 side) is connected.
- CPU 115 as control means for controlling data processing circuit 132, AC power supply 106, etc., and hardware for storing programs, data, etc.
- the CPU 115 has a disk 116 and is connected to the operation input device 109 for performing an operation for setting the direction of the rotating magnetic field, and a keyboard 112 for inputting commands and data. .
- the monitor 113 is connected to the data processing circuit 132, an image is captured by the image sensor 122, the image is processed by the data processing circuit 132 via the wireless circuits 126, 131, etc. Is displayed.
- the data processing circuit 13 2 captures an image while the capsule 103 is rotated, the data processing circuit 13 2 performs a process of correcting the orientation of the image displayed on the monitor 113 to a fixed direction. Perform image processing so that images that are easy for the user to view can be displayed.
- FIG. 25 shows the outer shape of the capsule 103
- FIG. 26 shows the internal structure thereof.
- the capsule 103 has, for example, a hemispherical transparent tip cover 13 9 and a cylindrical shape to which the tip cover 13 9 is air-tightly connected.
- a substantially cylindrical force body 141 is hermetically covered with the body exterior member 140 and the inside is sealed.
- the rear end of the main body exterior member 140 has a substantially hemispherical shape.
- the capsule body 141 has a rotationally symmetric outer shape rotated around a central axis C in the longitudinal direction which also corresponds to the traveling direction.
- a helical structure for generating a propulsion for converting a rotational motion into a propulsive force.
- the spiral structure projects spirally from the cylindrical outer peripheral surface (base surface) 141 a of the capsule body 141 and contacts the inner wall of the body cavity to convert the rotational motion into propulsion force.
- Protrusions 144 are provided.
- a spiral groove is formed between the adjacent spiral protrusions 144 so that fluid such as gas and body fluid in the body cavity can be communicated back and forth.
- the built-in components such as the above-described objective lens 121 and the illumination element 123 are housed and arranged.
- an objective lens 121 is mounted on a cylindrical lens frame 144 in the center of the inside of the distal end cover 133 inside the capsule body 144.
- An image sensor substrate 144 on which an image sensor 122 is mounted is arranged at an image forming position 21, and a plurality of illumination elements 123 are arranged around a lens frame 144.
- a control board 146 for performing signal processing and control and a communication board 147 having functions such as a wireless circuit 126 are arranged adjacent to the imaging element board 145 so as to be stacked.
- An antenna 1 27 is connected to the plate 1 47. Further, the lighting element 123, the imaging element substrate 144, and the like are electrically connected by a flexible substrate 148.
- a magnet 108 is arranged at a substantially central position of the length on the central axis C in the longitudinal direction of the capsule 103 such that the direction orthogonal to the central axis C is the longitudinal direction, It is fixed with an adhesive (not shown) or the like. '
- a battery 129 is housed adjacent to the magnet 108, and is connected to the flexible board 148 via a switch circuit 149.
- the capsule 103 can be used as a magnetic field.
- the rotating magnetic field generated by the generator 5 acts on the magnet 108, and the capsule 103 is rotated by the rotating force received by the magnet 108.
- the magnet 108 used here is a permanent magnet such as neodymium magnet, summary cobalt magnet, platinum magnet, iron-chromium cobalt magnet, platinum magnet, alnico (AlNiCo) magnet, and the like.
- Rare earth magnets such as neodymium magnets and summary cobalt magnets have a strong magnetic force and have the advantage of making the magnet built into the capsule smaller.
- ferrite magnets have the advantage of being inexpensive.
- platinum magnets have excellent corrosion resistance.
- the spiral projecting portion 144 formed on the outer surface of the capsule body 141 has its distal end side reduced in diameter into a hemispherical shape via the cylindrical outer peripheral surface.
- the end portion 144 a is formed in a halfway reduced diameter in a hemispherical shape, specifically, at a position outside the viewing angle of the objective lens 121.
- the rear end 144b of the spiral projection portion 144 extends to the vicinity of the boundary where the diameter decreases in a hemispherical shape.
- the helical projections 144 are doubled (two strips) by further providing a helical projection 144 at an intermediate position of one of the spiral projections 144. Is formed.
- the spiral projecting portion 144 is provided on the outer surface of the capsule 103, and one end portion 144 a of the capsule 103 reaches a position near the end portion of the reduced diameter portion. It is formed with.
- the spiral projections 144 are also formed on the outer peripheral surface of the cylinder of the capsule body 141, but the other end 144a is made smaller in diameter than the radius of the cylinder. For example, it extends to a spherical portion and is formed so as to reach a boundary position that does not fall within the viewing angle.
- FIG. 27 shows a water tank for measuring the propulsion speed by using the one provided with the spiral projections 144 near the end of the capsule main body 141 as described above.
- a sample (having the external structure of the capsule 103 of the present embodiment) was inserted into this water tank while being inserted into a silicon tube simulating a luminal organ.
- the tube was filled with water and water pressure was applied to the tube (for example, the water level was 20 cm).
- a rotating magnetic field was applied from the outside and the tube was moved, for example, 2 cm, and the propulsion speed was measured.
- the propulsion speed was measured under the same conditions for a comparative sample (the second sample) in which the helical protrusions of the first sample were cylindrical portions only.
- Figure 28 shows the outline of the first sample.
- the second sample is the same as the first sample shown in FIG. 28 except that a spiral projection is provided only on the cylindrical portion.
- FIGS. 29 (A) and 29 (B) The measurement results obtained using these samples are shown in FIGS. 29 (A) and 29 (B).
- the measurement results shown in Fig. 29 () and Fig. 29 (B) were performed 10 times, and the average was plotted.
- the frequency of the rotating magnetic field was 0.5 ⁇ , 1 ⁇ , and 5 Hz.
- Figures 29 (A) and 29 (B) show the same experimental results with different frequency and speed scales.
- the data shown with circles was obtained from a sample without spiral projections at the tip (simplified in Fig. 29, abbreviated as "no tip"), and the data shown with triangles is also at the tip. It is provided with a projection.
- Fig. 29 (A) shows the frequency and speed up to 5 Hz
- Fig. 29 (B) shows the measurement results up to 1 Hz. It is shown enlarged.
- the provision of the spiral projection to the end has a propulsion speed approximately 1.4 times higher than the case where no spiral projection is provided near the end. This indicates that the spiral projection at the end contributes to propulsion.
- FIGS. 30 (A) and 30 (B) Another characteristic operation of the capsule 103 according to the present embodiment will be described with reference to FIGS. 30 (A) and 30 (B).
- the spiral projections 144 are formed near the ends where the diameter is further reduced, so that In this case, the spiral projections 144 formed up to the vicinity of the end engage the irregularities on the inner wall surface of the luminal organ, so that the capsule 103 can be propelled more smoothly. it can.
- a spiral structure more specifically, a spiral projection 144 is provided near the end portion where the diameter is reduced, and the capsule 3 is driven to rotate.
- the propulsion force can be improved and the target part can be reached in a short time, and even in the case of a bent pipe, the spiral projection 43 formed near the end makes it more smooth. It is characterized in that it can be propelled along a curved pipe.
- the operator turns on the switch circuit 149 of the capsule 103 in advance, and the power of the battery 129 is transmitted to the lighting element 123, etc. To be reached.
- the operator activates (turns on) the magnetic field generator 105, and the capsule 103 is moved in the body cavity duct ⁇ ⁇ ⁇ by the rotating magnetic field generated by the magnetic field generator 105. Is controlled magnetically so as to easily reach.
- the capsule body 14 1 is rotated by the action received by the magnet 108. .
- the frictional force between the mucous membrane of the inner wall of the body cavity and the spiral projection portion 144 is converted into a large propulsion force. Move forward and backward.
- the capsule body 141 changes its traveling direction (direction) while rotating so that the rotating plane of the magnet 108 and the rotating plane of the rotating magnetic field coincide with each other. Is performed.
- the capsule body 141 can be smoothly propelled toward the target site side in the lumen and the duct.
- the capsule 103 When the capsule 103 is swallowed by the patient 102, the capsule 103 passes through the esophagus 153 from the oral cavity 152 and reaches the inside of the stomach 154.
- the operator when it is necessary to observe the inside of the stomach 154, the operator performs a key input corresponding to an observation start command from, for example, the keyboard 112 of the control device 104. Then, the control signal by the key input is radiated by radio waves via the extracorporeal antenna 114 of the control device 104 and transmitted to the capsule 103 side.
- the capsule 103 detects an operation start signal based on the signal received by the antenna 127, and the illumination element 123, the imaging element 122, the signal processing circuit 124, and the like are driven.
- the illumination element 1 2 3 emits illumination light in the direction of the field of view of the objective lens 1 2 1, and an optical image of the illuminated portion in the field of view is arranged at the image forming position of the objective lens 1 2 1 After being formed into an image, it is subjected to photoelectric conversion, is subjected to AZD conversion by a signal processing circuit 124, is subjected to digital signal processing, is subjected to compression processing, is stored in a memory 125, and is modulated by a wireless circuit 126. It is radiated by radio waves from antenna 127.
- This radio wave is received by the external antenna 114 of the controller 104, demodulated by the wireless circuit 131 inside the personal computer 111, and then A / D converted to a data processing circuit. It is converted into a digital video signal by 13 2 and stored in the memory of the data processing circuit 13 2 and the hard disk 1 16 as well as read out at a predetermined speed and imaged on the monitor 1 13 by the image sensor 1 2 2 The displayed optical image is displayed in color.
- the operator can observe the inside of the stomach 154 of the patient 102 by observing this image. While observing the observation image, it is possible to easily control how to apply an external magnetic force so that the entire area of the stomach 154 can be observed using operation means such as a joystick of the operation input device 109.
- the stomach 154 is magnetically guided. From the duodenum can be moved to the 15 1 side.
- the capsule 103 can be smoothly propelled by controlling the direction of the rotating magnetic field so that the capsule advances in the direction of the lumen also in the duodenum 151.
- a spiral projection 144 is formed near the spherical end of the capsule body 141 as described in FIG. 30 (A).
- the capsule 103 can be smoothly advanced even in a bent pipe.
- the capsule 103 can be smoothly propelled, so that the time required for the examination can be reduced, and the burden and fatigue of the operator and the patient can be reduced.
- the capsule 103 of the present embodiment improves the magnetic field induction efficiency because there is no useless movement, and the magnet 10.8 inside the capsule body 141 and the electromagnets 105 a to l0 outside the body. There is also an effect that 5c can be reduced in size.
- FIG. 31 shows a capsule 103B according to the fifth embodiment of the present invention.
- the capsule 103 of the fourth embodiment has the rear end 144 b of the spiral projection part 144 located at a position immediately before the rear end of the capsule body 103. This extends further rearward and is formed near the end of the capsule body 141.
- FIG. 32 shows a capsule 103C of the first modified example.
- the outer shape of the capsule 103 B shown in Fig. 31 is substantially hemispherical, whereas the outer diameter of the capsule 103 C changes smoothly from the front end to the rear end like a cigar shape. I have.
- the capsule 103 C Since the outer diameter of the capsule 103 C is smoothly changed from the front end to the rear end, the capsule 103 C has a function and an effect of good insertability.
- FIG. 33 shows a capsule 103D of the second modification.
- the outer shape of the capsule body 141 is formed with a tapered portion 161 whose both ends of a cylindrical portion in the center are tapered (conical) in diameter. The front end and the rear end are flat as if cut.
- the insertability is good.
- it is shaped like a cut, miniaturization is possible.
- FIG. 34 shows a capsule 103 E of the third modified example.
- a capsule 103E shown in FIG. 34 is a capsule 103D shown in FIG. 33 in which the front end portion and the rear end portion are made substantially spherical instead of being flat.
- the outer shape of the capsule body 141 is formed with a tapered portion 161 in which both ends of the central cylindrical portion are tapered (conical) in diameter.
- the ends on the front and rear ends are substantially spherical.
- the front cover side and the rear end side are tapered and reduced in diameter, so that the insertability is good.
- FIG. 35 shows a capsule 103 F of the fourth modification.
- the constant pitch of the helical projections 14 3 formed on the outer surface of the capsule 103 F in this manner allows the capsule 103 F to rotate, thereby causing a depression in the inner wall surface of the luminal organ.
- the unevenness of the inner wall surface of the luminal organ is considered to be substantially constant, so that the capsule 103 can be efficiently propelled. .
- pitch is constant
- processing can be performed easily by setting the feed amount constant with respect to the rotation of the lathe during processing, and manufacturing can be performed at low cost.
- thrust can be generated efficiently with the entire capsule 103F because the feed amount per rotation in the narrow diameter part and the feed amount in one rotation in the large diameter part are the same. .
- Each of the above-mentioned capsules 103B etc. is a cordless type having no wire or tube at the rear, but a flexible tube is attached to the rear end (the opposite side of the tip cover 39) of this capsule 103B etc. It may be a cable-type capsule medical device which is rotatably mounted.
- the capsule medical device can be more effectively propelled or retracted by combining the propulsion by the spiral structure and the push and pull by the tube.
- FIG. 36 (A) shows a capsule 103G of the present embodiment
- FIG. 36 (B) shows an example of an acquired image obtained by the capsule 103G.
- the capsule 103G shown in FIG.36 (A) is, for example, provided with a hollow portion 162 along the longitudinal direction in the spiral projection 144 in the capsule103B of FIG.31.
- a hollow structure with an open end 162a that opens at the distal end 144a, and extends the end 144a to a position inside the viewing angle.
- the part 144a can be observed (by the acquired image).
- a hollow portion is provided inside the capsule body 141 to form a storage 164 capable of storing the medicine 163, and the storage portion 164 and the spiral projection are formed.
- a drug 16 stored in the storage section 16 4 with a micropump 16 6 that is driven for delivery (discharge drive) or suction driven between the tube 16 5 connecting the hollow section 16 3 of 16 3 and 16 2 3 is released from the open end 162a of the distal end through the hollow portion 162 of the spiral projection 144 so that the affected part or the like can be treated by administering a drug.
- a substance in the body such as a bodily fluid can be sucked from the open end 162a and stored in the storage section 1664.
- the medicine 163 stored in the storage section 164 is released from the open end 162a, and then the micropump 1665 is rotated in the reverse direction so that internal substances such as body fluids are released.
- the substance in the storage section 164 can be taken out of the capsule 103G and inspected in detail. ing.
- the helical projections 14 3 as a helical structure are used for releasing the drug 16 3, so that the helical structure can be used for propulsion and for the drug 16 3. It can also be used for release, and can realize a capsule 103G that is compact and has a function of imaging a body cavity and a function of releasing a drug for treatment.
- a capsule 103G having a function of collecting body fluids and other substances in the body cavity in the body cavity can also be realized.
- the propulsion force can be further improved, and the end portion 1443a is provided at the end portion 144a.
- the capsule 103G in FIG. 36 may be used only for releasing the drug 163, or may be used only for aspirating and collecting substances in the body.
- Various sensors such as a pressure sensor, a pH sensor, a temperature sensor, and a blood sensor are provided at the open end 162 a of the above-mentioned spiral projection 14 3 and the sensor wiring is arranged along the hollow 16 2. It may be arranged. A different type of sensor may be provided for each of the plurality of spiral protrusions .143, or the same type of sensor may be used. In this case, it is more convenient because, at the same time as the release of the drug 163 or the collection of the bodily fluid, the site and position measured by the sensor can be confirmed on the image.
- FIG. 37 shows a capsule 103 H of a modified example.
- This capsule 103 H is the same as the capsule 103 G of FIG. 36 (A), except that the storage section 16 4 inside the capsule 103 is not provided, and the micropump 160 provided inside the capsule 103 H is not provided. 6 is connected via a tube 16 5 to the hollow portion 16 2 of two doubly provided spiral projections 144. Then, when the micropump 1666 is rotated, for example, clockwise, the micropump 1666 performs an operation of sucking from the upper side to the lower side in FIG. 37, which is shown in a cross section in FIG. 37. The body fluid and the like can be sucked and stored in the hollow portion 62 of the spiral projection 144.
- a bodily fluid such as a bodily fluid and a substance to be tested are respectively suctioned and collected in the hollow portion 162 of the doubly provided spiral projections 144 at different portions, for example. be able to.
- This modification has substantially the same effect as the capsule 103 H of FIG.
- a ferromagnetic material such as iron or a magnetic material may be used instead of the magnet 108 serving as an electromagnetic field responsive part built in the capsule 103 or the like.
- an electric field may be applied instead of a magnetic field, and a charged substance or a dielectric substance may be incorporated in the capsule 103 or the like.
- the medical device body inserted into the body cavity is guided in the body cavity.
- the function of passing through the body cavity can be improved, and the medical device can be guided to the target site along the luminal organ in a short time by rotating the device, and is used for observation in the body cavity and various treatments.
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Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP04771603A EP1652466A4 (en) | 2003-08-06 | 2004-08-06 | MEDICAL DEVICE, MEDICAL DEVICE GUIDING SYSTEM, CAPSULE-TYPE MEDICAL DEVICE, AND CAPSULE-TYPE MEDICAL DEVICE GUIDING DEVICE |
| CN2004800218881A CN1829466B (zh) | 2003-08-06 | 2004-08-06 | 医疗装置、医疗装置引导系统、胶囊型医疗装置及胶囊型医疗装置引导系统 |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003288273A JP4137740B2 (ja) | 2003-08-06 | 2003-08-06 | カプセル型医療装置及びカプセル型医療装置誘導システム |
| JP2003-288273 | 2003-08-06 | ||
| JP2003-291771 | 2003-08-11 | ||
| JP2003291771A JP4153845B2 (ja) | 2003-08-11 | 2003-08-11 | 医療装置誘導システム |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2005013811A1 true WO2005013811A1 (ja) | 2005-02-17 |
Family
ID=34137918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/011628 Ceased WO2005013811A1 (ja) | 2003-08-06 | 2004-08-06 | 医療装置、医療装置誘導システム、カプセル型医療装置及びカプセル型医療装置誘導装置 |
Country Status (4)
| Country | Link |
|---|---|
| US (2) | US7623904B2 (ja) |
| EP (1) | EP1652466A4 (ja) |
| KR (1) | KR100796077B1 (ja) |
| WO (1) | WO2005013811A1 (ja) |
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| WO2006087287A1 (de) * | 2005-02-18 | 2006-08-24 | Siemens Aktiengesellschaft | Drahtlos navigierbare kapsel |
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| CN116076994A (zh) * | 2016-09-23 | 2023-05-09 | 上海安翰医疗技术有限公司 | 一种操控磁性胶囊的方法 |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20070260105A1 (en) | 2007-11-08 |
| US7697970B2 (en) | 2010-04-13 |
| EP1652466A4 (en) | 2013-01-23 |
| US20050085696A1 (en) | 2005-04-21 |
| EP1652466A1 (en) | 2006-05-03 |
| KR20060036112A (ko) | 2006-04-27 |
| KR100796077B1 (ko) | 2008-01-21 |
| US7623904B2 (en) | 2009-11-24 |
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