JPH0130164Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an intracorporeal ultrasound diagnostic device in which an optical viewing tube is incorporated into the ultrasound probe main body so that organs can be abutted and diagnosed while being visually recognized.

As an intrabody cavity ultrasound diagnostic device that combines an optical viewing tube for observing the inside of a body cavity and an ultrasound probe for obtaining ultrasound signal images, those shown in FIGS. 1 and 2 have been proposed. . In these figures, reference numeral 1 denotes an ultrasonic probe head, which has an ultrasonic signal transmission/reception window 2 formed on its side, and a small diameter shaft 4 connected to its rear via a curved portion 3. 4 contains a cord for transmitting and receiving ultrasonic signals, a wire for driving a mirror in the ultrasonic probe head 1, etc. (not shown). This shaft body 4 passes through the channel of the insertion section 6 in which the optical viewing tube 5 is disposed, and its rear end is connected to the drive section 9 via the optical viewing tube proximal portion 7 and channel insertion port 8. There is. A light guide cable 10 and an eyepiece section 11 that is inclined with respect to the axial direction of the insertion section 6 are connected to the optical viewing tube proximal section 7 . Further, the drive section 9 is
A gripping handle 12 is connected to the lower part thereof, and a signal cable 13 is inserted therethrough, and a drive motor 14 is connected to the rear thereof.

In the above-mentioned ultrasound diagnostic apparatus, in order to obtain an ultrasound image, the insertion section 6 and the ultrasound probe head 1 are inserted into a body cavity, and a predetermined organ is captured within the field of view of the optical tube 5 in the insertion section 6. Ultrasonic probe head 1 at 15
The window 2 of the ultrasound probe head 1 is brought into contact with the organ 15 by bending the curved portion 3 as shown in FIG.

However, in the conventional apparatus described above, the ultrasound probe head 1 and the curved part 3 are located in front of the tip of the optical viewing tube 5.
Because the insertion part protrudes relatively long, the observation field of the optical viewing tube 5 is obstructed when inserting it into a body cavity or when bringing the ultrasound probe head 1 into close contact with an organ 15. 6 must be pushed down to bend the curved portion 3 and come into contact with it, which poses a problem in that it is difficult to operate and requires skill.

This idea was made in view of the above-mentioned points, and by making it possible to form a large cutout window in the insertion section that faces the tip of the optical viewing tube, the field of view of the optical viewing tube through the insertion section and the head of the ultrasound probe is improved. In addition, the curved portion can be curved in the viewing direction so that the probe head can be seen when the ultrasound probe head is brought into contact with an organ for ultrasound diagnosis. The part is curved in the viewing direction at the bending part, but by arranging the rotational drive shaft in the insertion part on the opposite side of the viewing direction of the optical viewing tube, the external force applied to the rotational drive shaft inserted into the bending part is prevented when the tube is bent. It is an object of the present invention to provide an intra-body cavity ultrasonic diagnostic device which is made smaller so as to reduce damage to the rotational drive shaft.

In order to achieve the above object, the present invention includes an insertion section in which an ultrasound probe head and a curved section are sequentially provided from the distal end side, a notch window cut out on the outer periphery of the insertion section behind the curved section, and the notch window. an optical viewing tube provided in the insertion section from the tip to the proximal side; a bending operation means capable of bending the bending portion at least in the visual field direction of the optical viewing tube; and an ultrasonic wave outputting device provided in the head of the ultrasound probe. and a rotational drive shaft that is inserted into the insertion portion and rotationally drives the ultrasound emitting means, and the rotational drive shaft is disposed within the insertion portion on a side surface opposite to the visual field direction of the optical viewing tube.

This invention will be specifically explained below with reference to the drawings. 3 to 12 show an embodiment of this invention. In these figures, reference numeral 21 denotes an insertion section, and an ultrasound probe head 23 having an ultrasound transmission/reception window section 22 from the front to the side, and a curved section 24 are connected to the tip of the insertion section 21 in order from the front to the side. These insertion section 21, ultrasound probe head 2
3. The curved portions 24 are configured to have approximately the same diameter.
A cutout window 25 cut out in the visual field direction is formed on the outer periphery of the insertion portion 21 behind the curved portion 24, and an endoscope guide tube 26 is disposed from the cutout window 25 to the rear end of the insertion portion 21. A perspective-viewing endoscope 27 of the same diameter is inserted and removably inserted. In the case of the illustrated device for intra-abdominal organ diagnosis, the cutout window 25 formed in the insertion portion 21 is located on the right side when viewed from the operator in the normal usage state, and the cutout window 25 has a perspective-view type inside. The distal end of the endoscope 27 is positioned so that the diagonally right front is within the field of view of the endoscope. The perspective-viewing endoscope 27 used has a viewing direction of approximately 45 degrees or more. Further, the inclination angle of the viewing direction of the cutout window 25 formed in the insertion section 21 is formed in the range of 5 degrees to 25 degrees, so that the field of view of the endoscope 27 is adjusted to the insertion section 21.
It is configured so that it is not obstructed by the outer periphery.

A hand portion main body 28 is connected to the rear end of the insertion portion 21, and a grasping grip 29 that is inclined approximately 60 degrees forward with respect to the axial direction is integrally attached to the upper outer periphery of the hand portion main body 28 in normal use. connected and configured to be grasped with one hand. This prevents the grip 29 from coming into contact with the body wall and getting in the way even if the insertion section 21 is tilted significantly, especially when the insertion section 21 is inserted into a body cavity to diagnose deep organs. The head of the grip 29 has a substantially spherical bending operation part 30, and a bending operation lever 31 is protruded from the bending operation part 30 so that the grip 29 can be operated with the thumb of the hand holding the grip 29. It's getting old.

Drive device 32 with built-in ultrasonic scanning motor
is configured separately from the grip 29,
The drive device 32 and the grip 29 are connected by a flexible drive cable 33.
Further, the drive device 32 is connected to a display device 36 including a cathode ray tube 35 via a signal cable 34. Furthermore, a flexible light guide cable 38 is connected to the front of the eyepiece 37 of the oblique-viewing endoscope 27, and is connected to a light source device 39. This light guide cable 3
8 and the drive cable 33 are used to improve operability so as not to interfere with the insertion of the insertion section 21 into the body cavity, the operation of bringing the ultrasound probe head 23 into contact with a predetermined organ, and the ultrasound diagnostic operation. , are connected in the same lateral direction to the endoscope eyepiece section 37 and the bending operation section 30 of the head of the grip 29, respectively.

The ultrasound probe head 23 and the curved portion 24 are
It is configured as shown in the figure. That is, a medium chamber 40 is formed in the ultrasound probe head 23,
An ultrasonic transducer 41 and a mirror 4 are provided in this medium chamber 40.
2 are arranged facing each other. This vibrator 4
A signal cable 43 inserted from the drive device 32 through the insertion portion 21 is connected to the mirror 42 , and a shaft portion 44 is formed on the mirror 42 .
A flexible drive shaft 45 is connected to. On the other hand, the bending section 24 is configured by pivotally supporting a plurality of joint members 46, which are covered with a rubber jacket 47, and further provided with a bending operation section 30 at the tip joint member 46.
The operation wire 48 inserted through the hole is fastened thereto.

The curved direction of the curved portion 24 is set in the visual field direction of the endoscope 27 as shown in FIG. The ultrasonic transmitting/receiving window 22 is configured to fit within the field of view of the mirror 27. In this way, in the case of the one for intra-abdominal organ diagnosis shown in the figure, the endoscope 27 inserted into the insertion section 21
The visual field direction and the curved direction of the curved portion 24 are set to the right when viewed from the operator because the intra-abdominal organ 4
7. When using ultrasonic waves for diagnosis, it is naturally determined which part of the skin has many blood vessels and where the organs are located, and therefore the insertion position and insertion direction are medically determined, so it is normal. If the field of view is in the right direction in the usage state of
This is because it is suitable for operation and observation within a body cavity due to the close contact of item 3. Therefore, it goes without saying that the viewing direction and curved direction of the endoscope 27 used for ultrasonic diagnosis of organs other than those in the abdominal cavity do not have to be in the right direction.
Further, the ultrasonic transmitting/receiving window 22 provided in the ultrasonic probe head 23 is arranged in the viewing direction of the endoscope 27 so that when the bending portion 24 is bent, it is possible to visually confirm which part the window 22 is in contact with. It is arranged at a position perpendicular to the direction of curvature.

Further, as shown in FIG. 7, the cutout window 25 formed in the insertion portion 21 is formed in a connecting member 51 that connects the tip of the outer tube 50 constituting the insertion portion 21 and the curved portion 24. The outer tube 50 side of the connecting member 51 is fitted and fixed inside the outer tube 50, while the curved portion 24 side of the connecting member 51 engages the joint member 46 inwardly, and the outer circumference of the outer connecting member 51. It is fixed by screwing in screws 52. With this configuration, the inner side of the connecting portion between the joint member 46 and the connecting member 51 containing the drive shaft 53, the signal cable 43, the operating wire 48, etc. can be made wide. Furthermore, as shown in FIG. 9, the insertion portion 2
In order to make the cutout window 25 formed in the endoscope 1 large, the mirror drive drive shaft 53 inserted into the insertion section outer tube 50 is disposed on the opposite side to the viewing direction of the endoscope 27. Moreover, by arranging it in this way, when the curved portion is curved in the visual field direction of the optical viewing tube 27 for diagnosis, the rotational drive shaft 53 inserted into the insertion portion 21 can be curved as much as possible. Therefore, the external force applied to the rotary drive shaft 53 is small, and the damage caused is small.

Further, the connection between the insertion portion 21 and the proximal body 28 is as shown in FIG. That is, the pipe receiver 55 for holding and fixing the endoscope guide tube 26, the drive shaft tube 54, and the insertion section mantle tube 50, respectively, is attached to the proximal body 2.
A thread is formed on the outer periphery of this hand portion main body 28, and a cap 56 having a female thread is screwed from the outer circumferential direction to press and fix the pipe receiver 55 to the hand portion main body 28. Further, the mirror drive shaft 53 is supported by a bearing in a pipe receiver 55, and the end position of the pipe receiver 55 is the end, and the end of the drive shaft 53 is inserted through the grip grip 29. A flexible drive shaft 45 is connected thereto. This flexible drive shaft 45 is disposed within a flexible tube.

On the other hand, a fixing hole 57 communicating with the endoscope guide tube 26 is formed on the rear end side of the hand portion main body 28, and an O. A ring 58 is inserted into the fixing hole 57, and a spiral groove 59 is provided on the inner circumference of the hole 57.
The O-ring tightening body 61 with a protruding pin 60 that engages in is screwed in to press and deform the O-ring 58, and the deformed O-ring 58 tightens the endoscope 27 to fix the removal direction and rotation direction. At the same time,
Maintains airtightness. Further, the O-ring tightening body 61 is formed into a cylindrical shape so that the endoscope 27 can be inserted therethrough, and a lever 62 is provided protruding from the outer periphery of the rear part.

In such a configuration, as shown in FIG. 11, the operator grasps the grip 29 with one hand and also places his or her thumb on the bending operation lever 31 of the approximately spherical bending operation part 30 formed on the head of the grip 29. The insertion section 21 is inserted into a body cavity, for example, the abdominal cavity, through a trocar (not shown) while the abdomen of the patient is being applied. While observing diagonally forward to the right, move the ultrasound probe head 23 toward the organ 4.
Lead to 9. After confirming the organ 49, the user operates the bending operation lever 31 with the thumb, pulls the operation wire 48, and moves the bending portion 24 in the viewing direction of the endoscope 27 for intraperitoneal diagnosis as shown in the figure. The ultrasound probe head 23 and the window 22 for ultrasound transmission and reception are brought into view by curving it to the right as seen from the operator, and the ultrasound transmission and reception is performed while visually checking the organ 49 and the like, as shown in FIG. 12. The window 22 for the organ 49
It is placed in close contact with a predetermined part of the body.

As described above, the endoscope 27 faces the cutout window 25 formed on the side of the insertion section 21 behind the curved section 24, and its tip is obliquely viewed, so that the field of view is limited to the ultrasound probe head 21. Since the ultrasound probe head 23 can be bent in the viewing direction of the endoscope 27, the ultrasound probe can be inserted while viewing the organ without being obstructed by the curved portion 24, and the ultrasound probe can be inserted into the organ 49 in close contact with the organ 49. This can be done while visually checking both parts of the head 23, and the diagnosis can be made accurately and easily.
Furthermore, it is also possible to check which position the ultrasonic wave transmitting/receiving window 22 is in contact with.

In this invention, in the above embodiment, the insertion portion 2
Although the endoscope 27 is configured to be inserted into and removed from the insertion section 21, an optical system may be built into the insertion section 21.

As described above, according to this invention, when the ultrasound probe head is brought into contact with an organ for ultrasound diagnosis, the curved portion can be curved in the viewing direction so that the probe head can be visually recognized. The insertion section is curved in the viewing direction at the bending section, and a rotational drive shaft is arranged inside the insertion section on the opposite side of the viewing direction of the optical viewing tube, so that the rotational drive shaft that is inserted into the curved section is applied to the insertion section when the insertion section is bent. The external force can be reduced, thereby reducing the damage to the rotational drive shaft, and the notch window of the insertion part that exposes the tip of the optical viewing tube can be formed large, so that the field of view of the optical viewing tube can be adjusted from the insertion part to the ultrasonic wave. As a result of being prevented from being obstructed by the probe head, the ultrasound probe head can be inserted and guided accurately and safely while observing the inside of the body cavity with the optical viewing tube.

[Brief explanation of the drawing]

Figure 1 is a front view of a conventional ultrasound diagnostic device;
Fig. 2 is a usage state diagram of the same as above, Fig. 3 and the following shows an embodiment of this invention, Fig. 3 is a general schematic diagram of the ultrasonic diagnostic device, and Fig. 4 is an illustration of how the endoscope is removed from the insertion section. 5 is a view taken in the direction of arrow A in FIG. 4, FIG. 6 is a sectional view showing the ultrasound probe head and curved portion, and FIG. 7 is a cutout window and curved portion of the insertion section. 8 is a sectional view taken along the line B-B in FIG. 7, FIG. 9 is a cross-sectional view of the insertion portion, and FIG. 10 is a cutaway of the main part showing the main body of the proximal portion. A cross-sectional view, FIG. 11 is an explanatory view showing the state of use, and FIG. 12 is an explanatory view showing the field of view of the endoscope in FIG. 11. 21... Insertion section, 23... Ultrasonic probe head, 25... Notch window, 27... Optical viewing tube, 42...
...Mirror, 53...Mirror drive shaft.

Claims (1)

[Scope of utility model registration request] an insertion section in which an ultrasound probe head and a curved section are sequentially provided from the distal end side; a notch window cut out on the outer periphery of the insertion section behind the curved section; and an optical system provided in the insertion section from the notch window to the proximal side. a viewing tube, a bending operation means capable of bending the bending portion at least in the visual field direction of the optical viewing tube, an ultrasonic wave emitting means provided in the head of the ultrasound probe, and an ultrasonic probe that is inserted into the insertion portion and An intrabody cavity ultrasound diagnostic apparatus, comprising: a rotational drive shaft for rotationally driving a sound wave emitting means, the rotational drive shaft being disposed within the insertion section on a side surface opposite to the visual field direction of the optical viewing tube.