EP4568590A1 - Pièce à main médicale motorisée pour fonctionnement 2-en-1 et instrument médical manuel avec fonctionnement 2-en-1 - Google Patents

Pièce à main médicale motorisée pour fonctionnement 2-en-1 et instrument médical manuel avec fonctionnement 2-en-1

Info

Publication number
EP4568590A1
EP4568590A1 EP23754197.4A EP23754197A EP4568590A1 EP 4568590 A1 EP4568590 A1 EP 4568590A1 EP 23754197 A EP23754197 A EP 23754197A EP 4568590 A1 EP4568590 A1 EP 4568590A1
Authority
EP
European Patent Office
Prior art keywords
rotation
motor handpiece
medical
shaft
end effector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23754197.4A
Other languages
German (de)
English (en)
Inventor
Andre Buerk
Thomas Hagen
Simone Hermle
Lilian Killinger
Juergen Barth
Roland-Alois Hoegerle
Uwe Schaz
Aaron VOGLER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aesculap AG
Original Assignee
Aesculap AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aesculap AG filed Critical Aesculap AG
Publication of EP4568590A1 publication Critical patent/EP4568590A1/fr
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
    • A61B17/1613—Component parts
    • A61B17/1622—Drill handpieces
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/00234—Surgical instruments, devices or methods for minimally invasive surgery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
    • A61B17/1613—Component parts
    • A61B17/1631—Special drive shafts, e.g. flexible shafts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
    • A61B17/1613—Component parts
    • A61B17/162—Chucks or tool parts which are to be held in a chuck
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
    • A61B17/1613—Component parts
    • A61B17/1622—Drill handpieces
    • A61B17/1624—Drive mechanisms therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
    • A61B17/1659—Surgical rasps, files, planes, or scrapers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
    • A61B17/1695—Trepans or craniotomes, i.e. specially adapted for drilling thin bones such as the skull
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
    • A61B2017/1602—Mills

Definitions

  • the disclosure relates to a medical motor handpiece for driving a distal end effector (tool), having a handle portion.
  • tools/instruments and associated instrument handpieces/hand instruments are used, for example, for processing bones, cartilage in arthroscopic procedures, in spinal surgery and similar orthopedic/surgical treatments, as well as for processing organic material in neurosurgery.
  • the tools/instruments have a handpiece/handle/handle section and possibly replaceable effectors, such as milling cutters, rotary knives, a polishing head or the like.
  • the effector is mounted in a shaft of the tool/instrument at its distal end, possibly rotatably driven.
  • a hydraulic, pneumatic or electric motor drive is provided as a tool drive, which is operatively connected to the tool head (effector) via a torque transmission train within the tool and/or the hand instrument or the handle section.
  • the drives can be integrated in the tool and/or in the hand instrument or designed as external drive units that are coupled to the tool or the hand instrument via power supply lines or torque transmission lines.
  • Bendable shafts for medical hand instruments are well known and usually have a proximal and a bendable distal shaft section.
  • the distal shaft section and the proximal shaft section each have an oblique end/an end face that is positioned relative to the respective shaft section axis.
  • the bevels/inclined end sections/end faces each have essentially the same angle of attack. That is why the bevels fit together in such a way that the proximal and distal shaft sections form a straight shaft/tube in a certain relative rotational position. If the distal shaft section now rotates about its longitudinal axis relative to the proximal shaft section and the proximal shaft section stops, the distal shaft section is inevitably angled by the raised end faces/end sections.
  • DE 102017 010 033 A1 also discloses a medical device with a guide unit, which has a guide tube with a longitudinal axis, a proximal first coupling part firmly connected to it and a cylindrical jacket-shaped swivel head distally, as well as with an actuation tube which is axially movable in the guide tube and connected to the swivel head , which causes the swivel head to pivot using a proximal operating element.
  • the operating element can be pivoted about the longitudinal axis and causes the pivoting head to pivot with axial displacement of the actuating tube.
  • US 9,597,093 B2 shows a tool which can be coupled to a drive unit in a torque-transmitting manner at its proximal end and which has a tool head at its distal end.
  • the tool head can be pivoted relative to a tool shank by rotating a sleeve arranged in the area of the tool head.
  • the tasks and goals of the disclosure are to eliminate or at least reduce the disadvantages of the prior art and in particular an intuitive one
  • the medical motor handpiece is characterized by a preferably sleeve-shaped control element, which is rotatably held on a distal end portion of the handle section about a longitudinal axis of the handle and can be coupled to the end effector in such a way as to transform a rotational movement of the control element in a first direction of rotation into a movement of the end effector and when the control element rotates in a second direction of rotation opposite to the first direction of rotation, to effect a function on the end effector.
  • the motor handpiece can be coupled to the end effector via a shaft and the operating element can cause the end effector to be bent relative to the shaft when the operating element rotates in the first direction of rotation.
  • the end effector can preferably have a first coupling device and the shaft can have a second coupling device, which are in active engagement with one another in a coupling state, wherein a rotational movement of the operating element in the second direction of rotation releases the active engagement between the first coupling device and the second coupling device.
  • the motor handpiece can be designed such that in a plan view of the end effector, the first direction of rotation is aligned in a clockwise direction of rotation and the second direction of rotation is aligned in a counterclockwise direction of rotation.
  • the handle section and/or the operating element has at least one indicator, preferably in the form of a numerical scale and/or a pictogram, for indicating the movement of the end effector and/or the function.
  • At least one latching and / or stop unit (locking device), in particular in the form of a ball pressure element, can be provided, which is intended and designed to limit the rotational movement of the operating element at end positions and / or a resistance to rotational movement on the operating element in at least to an intermediate rotation position.
  • An advantageous embodiment according to the disclosure can further be characterized by a locking unit, which locks a rotational movement of the operating element in the first direction of rotation and in the second direction of rotation in a locking position and unlocks it in an unlocking position.
  • the locking unit can preferably be designed as a locking slide, which is arranged on the operating element in order to move axially between the locking position and the unlocking position.
  • the locking slide has a spring element which presses the locking slide into the locking position.
  • the latching and/or stop unit can be designed in the form of at least one ball pressure element and have a spring force adjustment element, preferably in the form of a grub screw, for continuously adjusting a spring force of the ball pressure element.
  • the motor handpiece can be coupled to the end effector via a shaft and the shaft can be coupled in a rotationally fixed manner to a rotation transmission sleeve of the motor handpiece. It may also be preferred if the operating element transmits its rotational movement to the rotation transmission sleeve via a radial adjustment pin.
  • the motor handpiece can have a connection at a proximal end section for coupling the motor handpiece to a drive unit and a locking unit, which is connected to the control element in such a way that rotation of the control element in the second direction of rotation is blocked when the motor handpiece is connected to the Drive unit is coupled.
  • the locking unit can have a locking bar which is coupled to the operating element and shifts in the proximal direction when the operating element rotates in the second direction of rotation.
  • the drive unit can also form a stop, so that a movement of the locking bar in the coupled state of the motor handpiece and the drive unit is blocked/locked by the drive unit.
  • the disclosure relates to a medical hand instrument with a medical motor handpiece according to the disclosure and an end effector, which is coupled to the motor handpiece via a shaft in order to transmit torque from the motor handpiece to the end effector.
  • the disclosure relates to a (motor) handpiece with a rotary operating unit with which tool ejection can be initiated and the angulation of the distal tip can be adjusted in several stages.
  • a safety function (ON / OFF), as with known handpieces, ensures that the tool cannot be accidentally ejected when ON.
  • FIG. 1 shows a perspective view of a medical hand instrument according to a first embodiment of the present disclosure
  • FIG. 2 shows another perspective view of the medical hand instrument according to the first embodiment of the present disclosure
  • FIG. 3 is a partial longitudinal sectional view of a motor handpiece of the medical hand instrument according to the first embodiment
  • FIG. 4 is a cross-sectional view of the motor handpiece of the medical hand instrument according to the first embodiment
  • FIG. 5 is a partial longitudinal sectional view of a distal end portion of the medical hand instrument according to the first embodiment in a straight shaft shape
  • FIG. 6 is a partial longitudinal sectional view of the distal end portion of the medical hand instrument according to the first embodiment in an angled shaft shape
  • FIG. 7 is a partial longitudinal sectional view of the distal end portion of the medical hand instrument according to the first embodiment in a release state
  • 8 is an isometric perspective view of the motor handpiece of the medical hand instrument according to the first embodiment
  • 9 is a partial longitudinal sectional view of the motor handpiece of the medical hand instrument according to the first embodiment
  • FIG. 10 is a perspective longitudinal sectional view of the handheld medical instrument according to a modification of the first embodiment
  • FIG. 12 shows a perspective view of the medical hand instrument according to the first embodiment in an operating state
  • FIG. 13 shows a perspective view of the medical hand instrument according to the first embodiment in an operating state
  • FIG. 14 shows an isometric perspective view of a motor handpiece of a medical hand instrument according to a second embodiment
  • 16 is a cross-sectional view of the medical hand instrument according to the second embodiment.
  • FIG. 1 shows in perspective a medical hand instrument 1 according to a first embodiment of the present disclosure.
  • the medical one Hand instrument 1 has a medical motor handpiece 2, which has a proximal handle section 4 and which, as shown schematically in FIG. 1, can be coupled to a drive unit 6.
  • the drive unit 6 can also be accommodated in the motor handpiece 2 and supplied with energy via a power supply connection.
  • the hand instrument 1 has a distal tool (end effector/effector section) 8, which can be coupled to or decoupled from the motor handpiece 2, in particular to the handle section 4, via a (tool) shaft 10.
  • the tool 8 can be designed, for example, as a milling cutter, drill or polishing head.
  • the tool 8 When the shaft 10 is coupled to the handle section 4, torque is transmitted from the drive unit 6 via a torque transmission train arranged in the hand instrument 1, in particular the handle section 4 and the shaft 10, to the tool 8 in order to set it in rotation .
  • the hand instrument 1 it is known that the tool 8 can be angled relative to the shaft 10 (indicated by the arrow C in FIG. 1). This means that the tool 8 and the shaft 10 can, as described in more detail below, be angled relative to one another in such a way that a longitudinal axis S1 of the tool 8 and a shaft longitudinal axis S2 of the shaft 10 form an angle not equal to 180°, in particular smaller than 180° (cf .Fig. 6).
  • a sleeve-shaped operating element 12 is provided for this purpose in the hand instrument 1 according to the disclosure.
  • the operating element 12 is arranged at a distal end section of the handle section 4 and is rotatable about a longitudinal axis of the handle in a first direction of rotation A and in a second direction of rotation B that is opposite to the first direction of rotation A.
  • the motor handpiece 2 has the handle section 4 and the distally arranged operating element 12, which are arranged coaxially to one another, wherein the operating element 12 can be rotated relative to the handle section 4.
  • the first direction of rotation A is defined in the hand instrument 1 according to the present disclosure as a rotation of the operating element 12 relative to the handle section 4 to the left.
  • the first direction of rotation A in a distal plan view of the tool 8 corresponds to a clockwise rotation of the operating element 12.
  • the operating element 12 in the hand instrument 1 can also be rotated relative to the handle section 4 in the second direction of rotation B, which is opposite to the first direction of rotation A.
  • the second direction of rotation B is defined in the top view of the tool 8 as a rotation of the operating element 12 counterclockwise or as a rotation to the right.
  • the arrow D in FIG Second direction of rotation B ensures a simple and quick tool change.
  • Figs. 3 and 4 show partial sectional views of the hand instrument 1 according to the first embodiment.
  • an adjusting pin 14 is arranged in the radial direction of the operating element 12.
  • a radially outer end portion of the adjusting pin 14 is received in an axial groove 16, which is formed on an inner circumferential surface of the operating element 12.
  • the adjusting pin 14 is received in a rotation transmission sleeve 18.
  • the rotation transmission sleeve 18 is connected to the shaft 10 in a rotationally fixed manner, so that a movement of the adjusting pin 14 in the circumferential direction causes a rotation of the rotation transmission sleeve 18 and the tool 8.
  • Fig. 5 shows a longitudinal cross section of a distal end section of the hand instrument 1 in a straight shaft shape. Ie the control element 12 is not rotated relative to the handle section 4 (zero position). As a result, the tool 8 and the shaft 10 are not angled and the longitudinal axis S1 of the tool 8 is collinear with the shaft longitudinal axis S2. As can be seen in FIG.
  • the shaft 10 has a proximal shaft section 20 which faces the handle section 4 and can be coupled to it, and a distal shaft section 22 which can be coupled to the tool 8. If the operating element 12 is not rotated relative to the handle section 4 and the shaft 10 is in the straight shaft shape, the proximal shaft section 20 and the distal shaft section 22 are therefore arranged in a line or have an angle of 0° to one another.
  • the proximal shaft section 20 is designed essentially tubular and has an end face 24 positioned in the longitudinal axis S2 of the shaft at its distal end section.
  • the distal shaft section 22 is also approximately tubular. The tube tapers towards the distal end.
  • the distal shaft section 22 has an end face 26 positioned in the longitudinal axis S2 of the shaft at its proximal end section.
  • the raised end faces 24, 26 each have an angle of attack of preferably 22.5° to a plane normal to the longitudinal axis S2 of the shaft. If the shaft 10 is in a straight shaft shape or stretched out, the two raised end faces 24, 26 are offset from one another in such a way that the long ends of the raised end faces 24, 26 lie opposite one another in relation to the shaft longitudinal axis S2.
  • the employed end faces 24, 26 rest on one another.
  • the raised end faces 24, 26 do not necessarily have to have an angle of attack of 22.5°. Angles of attack of, for example, 10°, 18°, 30°, 45° or any other angle of attack are also conceivable.
  • the distal shaft portion 22 is designed to be coupled to the tool 8.
  • the distal shaft section 22 represents a tool holder, with the tool 8 in the tool holder is recorded and is rotatably mounted relative to the tool holder, ie the distal shaft section 22.
  • a first coupling device 28 is arranged in the distal shaft section 22.
  • a second coupling device 30 is provided on the tool 8, which in a coupling state realizes a coupling between the tool 8 and the distal shaft section 22 by interacting with the first coupling device 28 in order to fix the tool 8 in the distal shaft section 22 in the axial direction A.
  • the longitudinal axis S1 of the tool 8 or the distal shaft section 22 and the shaft longitudinal axis S2, i.e. the longitudinal axis of the proximal shaft section 20 in FIG. 5, form an angle of 0°.
  • a coupling state between the tool 8 and the distal shaft section 22 is shown in FIG. That is, the first coupling device 28, which is mounted in/on the distal shaft portion 22, and the second coupling device 30, which is provided on the tool 8, engage with each other.
  • the tool 8 has a tool head/effector 32, for example a milling head, and a tool shank 34.
  • the tool head 32 and the tool shank 34 are connected to one another in a rotationally fixed manner.
  • the tool shaft 34 is rotatably mounted in the distal shaft section 22 using a rolling bearing unit 36.
  • a drive shaft 38 extends through the proximal shaft section 20 and is non-rotatably connected to the tool shaft 34 and applies torque from the drive unit 6 to the tool shaft 34 in the form of a torque transmission train.
  • the rolling bearing unit 36 has at least one, here exactly two, rolling bearings 40, more precisely ball bearings, which are spaced apart from one another in the axial direction A, but which can alternatively also be designed as plain bearings.
  • the rolling bearings 40 are accommodated in a bearing housing 42, which is part of the rolling bearing unit 36.
  • the second coupling device 30 is inserted into the bearing housing 42 and is therefore not provided directly on the tool 8.
  • the rolling bearing unit 36 and thus also the bearing housing 42 is arranged fixed on the tool shank 34 in the axial direction A.
  • the second coupling device 30 it would also be conceivable for the second coupling device 30 to be provided directly on the tool shank 34.
  • the second coupling device 30 is designed as an axial securing groove 44 which extends continuously in the circumferential direction of the bearing housing 42 or runs around it.
  • the axial securing groove 44 preferably has a semicircular or circular segment-shaped cross section.
  • the first coupling device 28, which is provided in the distal shaft section 22, has at least one locking ball 46.
  • the diameter of the locking ball 46 is selected so that the locking ball 46 can be accommodated in the axial locking groove 44.
  • the axial locking groove 44 preferably completely surrounds at least one section of the locking ball 46 that contacts the axial locking groove 44.
  • the locking ball 46 is held in the axial locking groove 44 on its side opposite the axial locking groove 44 by a distal end of a locking pin/slider 48.
  • the locking pin 48 is part of the first coupling device 28.
  • the locking pin 48 is fixed in the radial direction R.
  • the locking pin 48 is displaceable or movable in the distal shaft section 22 in the axial direction.
  • the locking ball 46 is accommodated in the axial locking groove 44 and is held by the locking pin 48 in the radial direction in the axial locking groove 44.
  • This position of the locking pin 48 in the axial direction A is referred to as the coupling position.
  • An edge 63 at the distal end of the proximal shaft section 20 prevents the locking pin 48 from moving in the axial direction towards the proximal shaft section 20.
  • the proximal shaft section 20 has a fixed outer tube 50, a ring gear 52 with internal teeth 54, a pinion 56 with external teeth 58 and an eccentric locking bushing 60.
  • the ring gear 52 is positioned within the outer tube 50 and the longitudinal axis of the outer tube 50 corresponds to Longitudinal axis of the ring gear 52.
  • the outer tube 50 and the ring gear 52 are therefore arranged concentrically.
  • the ring gear 52 is connected to the rotation transmission sleeve 18, ie to the operating element 12, via a hollow shaft 62 accommodated in the proximal shaft section 20.
  • the outer tube 50 is designed as a stationary tube and therefore does not move.
  • the distal end of the outer tube 50 has the raised end face 24.
  • the distal end of the outer tube 50 also has a receiving bore 64 and a receiving pin for a rolling bearing 66.
  • the outer tube 50 has a groove/groove for the balls of the rolling bearing 66.
  • the distal shaft section 22 is mounted on the roller bearing 66.
  • the adjustment bushing 68 is stored in the receiving bore 64 of the proximal shaft section 20.
  • the adjustment bushing 68 is connected to the pinion 56 via a flexible silicone hose 70 in such a way that a rotation of the pinion 56 is transmitted to the adjustment bushing 68.
  • the flexible silicone hose 70 is attached to the adjustment bushing 68 and the pinion 56, for example by welding or gluing.
  • the adjustment bushing 68 is also positively connected to the distal shaft section 22 via a driving pin (not shown), so that a rotation of the adjustment bushing 68 is transmitted to the distal shaft section 22.
  • Fig. 6 shows a longitudinal cross section through the distal end section of the shaft 10, with the distal shaft section 22 relative to the proximal shaft section 20 at a respective angle of attack of the two end faces 24, 26 by 22.5 ° and therefore by 45 ° is angled.
  • the distal shaft section 22 is rotated by 180° about its own longitudinal axis S1 compared to the position in FIG. 5. In this position, the raised end faces 24, 26 rest completely/flatly on one another again. However, due to the rotation of the distal shaft section 24, the long ends of the raised end faces 24, 26 are positioned next to one another. The angles of attack of the turned end faces 24, 26 thus add up. As a result, the distal shaft section 22 is angled by twice the angle of attack of the raised end faces 24, 26 compared to the proximal shaft section 20.
  • the driving pin is arranged opposite the securing bushing 60.
  • the 45° position represents the reversal point for this construction.
  • the adjustment bushing 68 has rotated through 180° in this position. If the ring gear 52, i.e. the operating element 12, rotates further, the distal shaft section 22 would rotate back into the starting position (zero position).
  • the locking ball 46 is held by the locking pin 48 in the radial direction R in the axial securing groove 44 even when the distal shaft section 22 is angled in the maximum adjustable angular position or maximum angle with respect to the proximal shaft section 20 is.
  • the tool 8 is also secured in this angular position in the axial direction A in the distal shaft section by the engagement between the first coupling device 28 and the second coupling device 30.
  • the torque train in particular the drive shaft 38, towards the tool shaft 34, which is arranged in the transition region between the distal shaft section 22 and the proximal shaft section 20, is flexible.
  • This flexible section of the torque train allows the distal section of the tool shaft 34 with tool head 32 to be angled together with the distal shaft section 22 relative to the torque train in the proximal shaft section 20.
  • the flexible section of the torque train is designed so that it has a torque that is applied to a proximal Section of the tool shaft 34 is exerted, can continue to be transferred to the tool head 32.
  • Fig. 7 is a longitudinal sectional view of the distal end portion of the shaft 10 in a release state between the tool 8 and the distal shaft portion 22. That is, in the position shown in Fig. 7, the first coupling device 28 and the second coupling device 30 are not in operative engagement with each other, so that the tool 8 can be removed or changed.
  • the operating element 12 is rotated in the second direction of rotation B (see FIG. 2).
  • the locking ball 46 is no longer accommodated in the axial locking groove 44. Instead, it is held by the locking pin 48 in the radial direction R against an outer peripheral surface of the bearing housing 42.
  • the locking pin 48 must move in the axial direction A towards the proximal shaft section 20. This is prevented in the coupling state by the running edge 63 of the proximal shaft section 20. However, the edge 63 is interrupted at one point of a locking pin receiving recess 72.
  • the distal shaft section 22 rotates relative to the proximal shaft section 20 in a direction opposite to the bending, for example by (-)18 °, until the locking pin 48 is positioned relative to the proximal shaft section 20 is that it is at the same height as the locking pin receiving recess 72 in the circumferential direction.
  • a biasing element 74 which is part of the first coupling device 28, presses the locking pin 48 in the axial direction A towards the proximal shaft section 20. The biasing element 74 thus pushes the locking pin 48, more precisely its proximal end, which is designed as a locking projection 76, into the locking pin receiving recess 72.
  • the position in which the locking pin 48 is when its locking projection 76 engages the locking pin receiving recess 72 is referred to as the release state or release position.
  • the release position the distal end of the locking pin 48 is no longer opposite the axial locking groove 44. This means that the locking ball 46 is not held in the axial locking groove 44 in the radial direction R.
  • the tool 8 is therefore no longer fixed in the axial direction A relative to the distal shaft section 22. If, starting from the coupling state, a tensile force (in the axial direction A) is applied to the distal end of the tool 8, the locking ball 46 is released from the axial locking groove 44. In this way, the tool 8 can be uncoupled from the distal shaft section 22.
  • FIG 8 shows a perspective view of the distal end portion of the motor handpiece 2 according to the first embodiment without the shaft 10 being coupled to the handle portion 4.
  • a rotation of the operating element 12 in the first direction of rotation A causes the tool 8 to bend
  • a rotation of the operating element 12 in the second direction of rotation B releases the coupling between the tool 8 and the shaft 10, or the distal shaft section 22, by releasing the operative engagement between the first coupling device 28 and the second coupling device 30.
  • indicators 78 in the form of arrows which indicate the directions of rotation, are attached to the control element 12.
  • an indicator sleeve 80 which is attached to the handle section 4 in a rotationally fixed manner distal to the operating element 12, the user can quickly identify which direction of rotation corresponds to which function when operating the hand instrument 1.
  • the user can therefore assign the respective function, namely angling or uncoupling, to the individual directions of rotation A, B.
  • the motor handpiece 2 together with the control element 12 thus enables intuitive operation and integration of the two functions.
  • a locking slide 82 is arranged on the motor handpiece 2 according to the first embodiment.
  • the locking slide 82 is fixed in the operating element 12 in the radial and circumferential directions so that the locking slide 82 can only move in the axial direction relative to the operating element 12 between a (distal) locking and a (proximal) unlocking position. In the locking position, the operating element 12 cannot be rotated relative to the handle section 4, as explained in more detail below.
  • a distal pin section 83 of the locking slide 82 protrudes in order to fix or hold the operating element 12 in the circumferential direction relative to the handle section 4.
  • the recesses of the locking ring 84 preferably correspond to the indicators 78 attached to the outer circumferential surface of the indicator sleeve 80. The user can therefore simply set the tool 8 to be angled at a defined angle and fix the angled tool 8 at this angle.
  • the locking slide 82 In order to be able to rotate the operating element 12 relative to the handle section 4 to adjust the angle or to release the clutch, the locking slide 82 must therefore be moved from the locking position to the unlocking position, i.e. in the proximal direction.
  • the locking slide 82 is biased in the axial direction against the operating element 12 via a spring element 86.
  • the spring element 86 is arranged between the locking slide 82 and a stop surface of the operating element 12 in such a way that it presses the locking slide 82 into the locking position, ie in the distal direction.
  • the spring element 86 consequently exerts an automatic restoring force on the locking slide 82 in order to hold it in the locking position.
  • the motor handpiece 2 does not have a spring element 86.
  • an additional ball pressure element 88 is provided in the motor handpiece 2 according to the modification of the first embodiment.
  • This has a spring element 90, which presses a ball 92 in the proximal direction against a sliding link (dome locking ring) 94 (see FIG. 11) which is firmly accommodated in the handle section 4.
  • Dome-shaped locking recesses 96 are formed on the sliding link 94, which can at least partially accommodate the ball 92.
  • the locking recesses 96 correspond to defined angles through which the tool 8 can be angled relative to the shaft 10 when the operating element 12 is rotated in a certain way. That is, when the control element 12 is rotated by the defined angle relative to the handle section 4, the ball pressure element 88 rotates with the control element 12 until the defined angle is reached, at which the ball 92 falls into the corresponding locking recess 96 due to the preload force of the spring element 90 the slide gate 94 takes effect. The additional ball pressure element 88 therefore enables haptic feedback for the user when adjusting the angle.
  • the motor handpiece 2 shows the medical handpiece 1 according to the first embodiment in an operating state in which the motor handpiece 2 is connected to the drive unit 6.
  • the motor handpiece 2 has the connection at its proximal end section, which, as shown in FIG. 12, can accommodate a motor cable 98.
  • the motor handpiece 2 further has a locking slide 100, which can be displaced in the proximal direction in the OFF position (see FIG. 13) in order to release the connection between the shaft 10 and the motor handpiece 2.
  • the locking slide 100 has a locking bar 102, as can be seen in FIG Direction of rotation B, ie when releasing the active engagement between the first coupling device 28 and the second coupling device 30, extended in the proximal direction.
  • FIG. 14 shows a motor handpiece 2 for a medical hand instrument 1 according to a second embodiment. It can be seen that the motor handpiece 2 according to the second embodiment does not have a locking slide 82. The omission of the locking slide 82 enables an improved view of the operating field, more intuitive operation and reduced cleaning effort.
  • two ball pressure elements 104 are arranged in the operating element 12, as shown in FIG. 15. These each have a spring element 106, which presses a ball 108 as a locking body against the locking ring (locking plate) 84. That is, the spring element 106 presses the ball 108 in the distal direction against the locking ring 84. As can be seen in FIG. 16, this has recesses with which the balls 108 are connected. As mentioned above, the ball pressure elements 104 press against the locking ring 84 with their distal end sections, ie the balls 108.
  • the ball pressure elements 104 each have a spring force adjustment means in the form of a grub screw 110.
  • a spring force adjustment means in the form of a grub screw 110.

Landscapes

  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Medical Informatics (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Dentistry (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Surgical Instruments (AREA)

Abstract

La divulgation concerne une pièce à main médicale motorisée (2) servant à entraîner un effecteur d'extrémité distale (8, 22), comportant une partie manche (4), et un élément d'actionnement de préférence en forme de manchon (12) qui est maintenu de façon à tourner autour d'un axe longitudinal de manche au niveau d'une partie d'extrémité distale de la partie manche (4) et qui peut être couplé à l'effecteur d'extrémité (8, 22) pour transformer un mouvement de rotation de l'élément d'actionnement (12) dans une première direction de rotation en un mouvement de l'effecteur d'extrémité (8, 22) et en cas de mouvement de rotation de l'élément d'actionnement (12) dans une seconde direction de rotation, opposée à la première direction de rotation, pour effectuer une fonction sur l'effecteur d'extrémité (8, 22). La divulgation concerne également un instrument médical manuel (1) équipé d'une pièce à main médicale motorisée (2) selon la divulgation et un effecteur d'extrémité (8, 22) qui est couplé à la pièce à main motorisée (2) par l'intermédiaire d'un arbre (10, 20) en vue d'un transfert de couple de la pièce à main motorisée (2) à l'effecteur terminal (8, 22).
EP23754197.4A 2022-08-09 2023-08-03 Pièce à main médicale motorisée pour fonctionnement 2-en-1 et instrument médical manuel avec fonctionnement 2-en-1 Pending EP4568590A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022119979.7A DE102022119979A1 (de) 2022-08-09 2022-08-09 Medizinisches Motorhandstück für 2-in-1-Bedienung sowie medizinisches Handinstrument mit 2-in-1-Bedienung
PCT/EP2023/071589 WO2024033228A1 (fr) 2022-08-09 2023-08-03 Pièce à main médicale motorisée pour fonctionnement 2-en-1 et instrument médical manuel avec fonctionnement 2-en-1

Publications (1)

Publication Number Publication Date
EP4568590A1 true EP4568590A1 (fr) 2025-06-18

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Application Number Title Priority Date Filing Date
EP23754197.4A Pending EP4568590A1 (fr) 2022-08-09 2023-08-03 Pièce à main médicale motorisée pour fonctionnement 2-en-1 et instrument médical manuel avec fonctionnement 2-en-1

Country Status (6)

Country Link
US (1) US20260041439A1 (fr)
EP (1) EP4568590A1 (fr)
JP (1) JP2025526032A (fr)
CN (1) CN119654108A (fr)
DE (1) DE102022119979A1 (fr)
WO (1) WO2024033228A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005062827A2 (fr) 2003-12-19 2005-07-14 Spinascope Inc. Fraise a dissection haute vitesse pour chirurgie vertebrale
US8303594B2 (en) 2008-12-30 2012-11-06 Howmedica Osteonics Corp. Method and apparatus for removal of tissue
WO2012004766A2 (fr) 2010-07-07 2012-01-12 Yoseph Weitzman Dispositif chirurgical pour l'ablation de tissu
DE102011050602B4 (de) * 2011-05-24 2016-01-14 Aesculap Ag Spannfutteranordnung einer medizinischen Handbohr- oder Handfräsmaschine
WO2013134652A2 (fr) * 2012-03-08 2013-09-12 Zyga Technology, Inc. Procédé de réparation d'une fusion sacro-iliaque
EP3260061B1 (fr) 2013-11-29 2020-01-08 Chongqing Xishan Science & Technology Co.,Ltd. Fraise de meulage latéral à angle variable en continu et son composant d'entraînement
KR101454192B1 (ko) 2014-05-02 2014-11-04 가톨릭대학교 산학협력단 각도 조절이 가능한 의료용 전동 드릴
US9597093B2 (en) 2014-06-10 2017-03-21 Howmedica Osteonics Corp. Temporarily fixable angled drill
WO2016138443A2 (fr) * 2015-02-26 2016-09-01 Stryker Corporation Instrument chirurgical doté d'une région d'articulation
US10524820B2 (en) 2017-05-16 2020-01-07 Biosense Webster (Israel) Ltd. Deflectable shaver tool
DE102017010033A1 (de) 2017-10-27 2019-05-02 Joimax Gmbh Medizinische Vorrichtung
WO2019178575A1 (fr) * 2018-03-16 2019-09-19 Benvenue Medical, Inc. Instrumentation articulée et et ses procédés d'utilisation
US11116508B2 (en) * 2019-03-08 2021-09-14 Cilag Gmbh International Electrical potential shifting circuit for powered surgical stapler
DE102022107972A1 (de) * 2022-04-04 2023-10-05 Aesculap Ag Medizinisches Werkzeugsystem

Also Published As

Publication number Publication date
DE102022119979A1 (de) 2024-02-15
CN119654108A (zh) 2025-03-18
US20260041439A1 (en) 2026-02-12
JP2025526032A (ja) 2025-08-07
WO2024033228A1 (fr) 2024-02-15

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