CN111839841A

CN111839841A - Be arranged in articular turnover hand prosthesis and surrounding bone cement stripping off device

Info

Publication number: CN111839841A
Application number: CN202010723291.2A
Authority: CN
Inventors: 解凤宝; 史春宝; 程振博; 郝孟娟
Original assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Current assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2020-10-30

Abstract

The application relates to a device for stripping prosthesis and surrounding bone cement in a joint revision hand, belonging to the field of joint revision surgery; it comprises a handle and a blade arranged at one end of the handle; a slide way is arranged at one end of the handle, which is far away from the blade, the slide way is positioned at the axis of the handle and also extends along the length direction of the handle, a push rod is arranged in the slide way, and the push rod slides in the slide way along the length direction of the slide way; one end of the push rod protrudes out of the end part of the handle, and the other end of the push rod is connected with the blade extending into the slide way. This application has and supports the blade through the handle, need not increase blade thickness, and then reduces the blade and injures the effect of skeleton probability.

Description

Be arranged in articular turnover hand prosthesis and surrounding bone cement stripping off device

Technical Field

The application relates to the field of joint revision operations, in particular to a device for stripping prosthesis and surrounding bone cement in a joint revision hand.

Background

Currently, joint revision surgery involves stripping a damaged prosthesis from the surrounding bone tissue or cement and re-implanting a new prosthesis. The dissector is an essential instrument in the operation of the joint revision surgery and is very important for the smooth operation of the surgery. Whether the peripheral bone is affected by the prosthesis extraction or not has an important function of smooth postoperative rehabilitation.

In view of the above-mentioned related technologies, the inventor believes that the existing revision instrument prosthesis and the blade and the handle of the bone cement stripper are rigidly fixed, the blade is guaranteed by the rigidity of the blade in the operation process, the blade needs enough thickness for supporting, and if the bone cement around the prosthesis of a patient is relatively thin in the operation process, the thick blade is easy to hurt the bone.

Disclosure of Invention

In order to reduce the problem that the thickness of the blade is increased to easily damage the bone, the application provides a prosthesis and surrounding bone cement stripping device for an articular turnover hand.

The application provides a be arranged in articular turnover hand prosthesis and surrounding bone cement to peel off device adopts following technical scheme:

a device for stripping prosthesis and surrounding bone cement in an articular joint revision hand comprises a handle and a blade arranged at one end of the handle;

a slide way is arranged at one end of the handle, which is far away from the blade, the slide way is positioned at the axis of the handle and also extends along the length direction of the handle, a push rod is arranged in the slide way, and the push rod slides in the slide way along the length direction of the slide way;

one end of the push rod protrudes out of the end part of the handle, and the other end of the push rod is connected with the blade extending into the slide way.

Through adopting above-mentioned technical scheme, at the in-process of performing the operation, handle and false body butt, then to the catch bar application of force, thereby the catch bar removes to release the blade from handle inside, and the blade gets into to peel off between false body and the bone cement, peels off the in-process at the blade, and the handle plays the effect of support to the blade mainly, thereby makes blade itself not play the effect of support, need not increase the thickness of blade, and then avoids too thick blade to cause the damage to the skeleton.

Preferably, one end of the push rod, which is far away from the blade, is fixedly connected with a hemispherical stressed part.

Through adopting above-mentioned technical scheme, the edge that the atress portion reduced the catch bar tip to exist, and the better and palm of hemispherical atress portion laminating, when the application of force to the catch bar, atress portion and palm laminating reduce the uncomfortable sense that the catch bar led to the fact to the palm.

Preferably, two limit grooves which are the same as the slide rail in the length direction are formed in the circumferential surface of the inner wall of the slide rail, the limit grooves are rectangular and are symmetrically arranged, and the blades are located in the limit grooves.

Through adopting above-mentioned technical scheme, two of blade are in the spacing inslot to make the spacing groove spacing to the blade, avoid the in-process that the blade removed to produce and rotate or skew, thereby avoid the blade to cause the damage to the skeleton.

Preferably, the limiting groove penetrates through the whole handle.

Through adopting above-mentioned technical scheme, make things convenient for the whole of catch bar and blade to take out to more make things convenient for the blade to change, improve the efficiency of work.

Preferably, one end of the push rod, which is close to the blade, is fixedly connected with two clamping plates, the end part of the blade is positioned between the two clamping plates, the clamping plates are in threaded connection with screws, and the screws penetrate through the end parts of the blade.

Through adopting above-mentioned technical scheme, convenient quick stable carries out fixed mounting to the blade, and when the blade is changed to needs, change blade that also can be quick improves the efficiency of work.

Preferably, still be equipped with the extraction tool on the atress portion, the extraction tool includes the slide bar with atress portion threaded connection, and the cover is equipped with the removal portion on the slide bar, and the one end fixedly connected with that the stress portion was kept away from to the slide bar blocks the portion.

Through adopting above-mentioned technical scheme, the cooperation between removal portion and the stop part can utilize the removal portion to realize pulling out of blade to blockking the inertia force that the impact produced, and is convenient quick, has still reduced the probability that the blade produced and has rocked simultaneously, reduces the blade and produces the probability of warping or causing the injury to the skeleton.

Preferably, the moving part is cylindrical, and a plurality of annular grooves are formed in the circumferential surface of the moving part.

Through adopting above-mentioned technical scheme, under the effect of columniform removal portion and the recess of seting up on the removal portion, removal portion and hand laminating are better, make things convenient for more to removal portion application of force, are favorable to once only pulling out the blade, reduce the damage that the action of pulling out the blade caused the skeleton.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the handle is internally provided with a slideway, a push rod is arranged in the slideway, one end of the push rod is connected with a blade, the blade moves along with the push rod, and the blade can extend out of or retract into the push rod, so that the blade is supported by the handle without thickening the blade, and the probability of damage of the blade to bones is reduced;

2. the one end that the blade was kept away from to the catch bar is equipped with the extraction tool, and the extraction tool includes the slide bar of being connected with the catch bar, and the cover is equipped with removal portion on the slide bar, and the one end fixedly connected with stop part of catch bar is kept away from to the slide bar, and removal portion slides and leads to the fact the impact to stop part, utilizes the inertial force of production to pull out the blade down, and convenient and fast reduces the probability that the action of pulling out the blade led to the fact the damage to the skeleton.

Drawings

FIG. 1 is a schematic view showing the overall structure of the peeling apparatus in the example.

FIG. 2 is a schematic structural view of the embodiment of the prominent push rod.

FIG. 3 is a schematic structural view showing the connection relationship between the blade and the push rod in the embodiment.

FIG. 4 is a schematic structural diagram of the connection relationship between the extractor and the push rod in the embodiment.

FIG. 5 is a schematic view showing a state of use of the peeling apparatus in the embodiment.

Description of reference numerals: 1. a handle; 11. a slideway; 12. a limiting groove; 2. a blade; 3. a push rod; 31. a force receiving portion; 32. a splint; 33. a screw; 4. a puller; 41. a slide bar; 42. a moving part; 421. a groove; 43. a blocking portion.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

The arthroplasty procedure involves stripping the damaged prosthesis from the surrounding bone tissue or cement and re-implanting a new prosthesis. The existing detacher is a necessary instrument in the operation of the joint revision surgery and is very important for the smooth operation of the surgery. Whether the peripheral bone is affected by the prosthesis extraction or not has an important function of smooth postoperative rehabilitation.

The embodiment of the application discloses a device for stripping prosthesis and surrounding bone cement in a joint revision hand. Referring to fig. 1 and 2, the peeling apparatus includes a handle 1 and a blade 2 mounted on the handle 1; one end of the handle 1 is provided with a circular slide way 11, the slide way 11 extends along the length direction of the handle 1 and penetrates through the whole handle 1, the inner wall of the slide way 11 is also provided with two limiting grooves 12, the two limiting grooves 12 are symmetrically arranged, and the limiting grooves 12 extend along the length direction of the slide way 11 and penetrate through the whole handle 1; a push rod 3 is arranged in the slideway 11. The blade 2 is also positioned in the slideway 11, and two sides of the blade 2 are positioned in the two limit grooves 12; the blade 2 can be prevented from rotating in the moving process, and further the damage of the blade 2 to bones can be avoided.

Referring to fig. 1 and 2, one end of the push rod 3, which is far away from the blade 2, is fixedly connected with a hemispherical stress part 31, and the stress part 31 is attached to the palm, so that the push rod 3 can be better and conveniently applied with force, and discomfort of the edge on the push rod 3 to the palm is reduced.

Referring to fig. 3, one end of the push rod 3 close to the blade 2 is fixedly connected with two symmetrically arranged clamping plates 32, the blade 2 is positioned in a gap formed by the two clamping plates 32, one of the two clamping plates 32 is inserted with a screw 33, and the screw 33 passes through the blade 2 and is in threaded connection with the other clamping plate 32; therefore, the blade 2 is fixed through the screw 33, the blade 2 is conveniently and stably and quickly installed on the push rod 3, and the blade 2 is conveniently detached and replaced when the blade 2 needs to be replaced.

Referring to fig. 4 and 5, the force receiving portion 31 is further provided with an extractor 4, the extractor 4 includes a sliding rod 41 in threaded connection with the force receiving portion 31 and a moving portion 42 sleeved on the sliding rod 41, and the moving portion 42 can slide along the sliding rod 41; one end of the sliding rod 41 far away from the force-bearing part 31 is fixedly connected with a blocking part 43; when the blade 2 needs to be pulled out, the pulling-out device 4 is installed on the stress part 31, then the moving part 42 moves towards the direction close to the stress part 31, finally the moving part 42 moves towards the direction close to the blocking part 43 with force, and the moving part 42 impacts the blocking part 43, so that the blade 2 is pulled out from between the bone cement and the prosthesis by inertia, and the operation is more rapid and convenient, and the operation is facilitated.

Referring to fig. 5, the moving portion 42 is cylindrical, and a plurality of uniformly distributed annular grooves 421 are formed on the circumferential surface of the moving portion 42, and the grooves 421 are attached to the fingers, so that the doctor can grasp the moving portion 42 more conveniently, apply force to the moving portion 42, and drive the moving portion 42 to move.

The implementation principle of the stripping device in the embodiment of the application is as follows: in the operation of stripping the prosthesis, one end of the handle 1, which is inserted with the blade 2, is abutted against the prosthesis to be separated, the blade 2 is positioned in the handle 1 at the moment, the blade 2 is aligned with the gap between the prosthesis and the bone cement, then the pushing rod 3 is applied with force, the blade 2 is pushed out of the handle 1, and the blade 2 extends out to enter the space between the bone cement and the prosthesis, so that the prosthesis is stripped. After the stripping operation is completed and the blade 2 needs to be pulled out, the puller 4 is firstly installed on the stressed part 31 of the push rod 3, then the moving part 42 is slid to make the moving part 42 far away from the blocking part 43, finally the moving part 42 is slid forcibly to make the moving part 42 move rapidly towards the direction close to the blocking part 43, impact is generated on the blocking part 43, the inertia force generated by the impact of the moving part 42 is utilized to drive the push rod 3 to move towards the direction far away from the prosthesis, and the blade 2 is pulled out to complete the pulling-out action of the blade 2, so that the operation can be continued conveniently.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A device for stripping prosthesis and surrounding bone cement in a joint revision hand is characterized in that: comprises a handle (1) and a blade (2) arranged at one end of the handle (1);

one end, far away from the blade (2), of the handle (1) is provided with a slide way (11), the slide way (11) is located at the axis of the handle (1) and also extends along the length direction of the handle (1), a push rod (3) is arranged in the slide way (11), and the push rod (3) slides along the length direction of the slide way (11) in the slide way (11);

one end of the push rod (3) protrudes out of the end part of the handle (1), and the other end of the push rod (3) is connected with the blade (2) extending into the slideway (11).

2. The device for the prosthetic-to-peripheral cement detachment in an articular revision hand of claim 1, characterized in that: one end of the push rod (3) far away from the blade (2) is fixedly connected with a hemispherical stressed part (31).

3. The device for the prosthetic-to-peripheral cement detachment in an articular revision hand of claim 1, characterized in that: two limiting grooves (12) which are the same as the length direction of the slide way (11) are formed in the circumferential surface of the inner wall of the slide way (11), the limiting grooves (12) are rectangular, the two limiting grooves (12) are symmetrically arranged, and the blade (2) is located in the limiting grooves (12).

4. A device for the prosthetic-to-peripheral cement detachment in an articular revision hand according to claim 3, characterized in that: the limiting groove (12) penetrates through the whole handle (1).

5. The device for the prosthetic-to-peripheral cement detachment in an articular revision hand of claim 1, characterized in that: one end of the push rod (3) close to the blade (2) is fixedly connected with two clamping plates (32), the end part of the blade (2) is positioned between the two clamping plates (32), a screw (33) is connected to the clamping plates (32) in a threaded mode, and the screw (33) penetrates through the end part of the blade (2).

6. The device for the prosthetic-to-peripheral cement detachment in an articular revision hand of claim 2, characterized in that: the drawing device is characterized in that a drawing device (4) is further arranged on the stress part (31), the drawing device (4) comprises a sliding rod (41) in threaded connection with the stress part (31), a moving part (42) is sleeved on the sliding rod (41), and a blocking part (43) is fixedly connected to one end, far away from the stress part (31), of the sliding rod (41).

7. The device for the prosthetic-to-peripheral cement detachment in an articular revision hand of claim 6, characterized in that: the moving part (42) is cylindrical, and a plurality of annular grooves (421) are formed in the circumferential surface of the moving part (42).