CN108095781B

CN108095781B - Patella retractor

Info

Publication number: CN108095781B
Application number: CN201810045553.7A
Authority: CN
Inventors: 李杨; 田华; 王彩梅
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2018-01-17
Filing date: 2018-01-17
Publication date: 2023-09-08
Anticipated expiration: 2038-01-17
Also published as: CN108095781A

Abstract

The application provides a patella retractor which is used for pulling a knee extension device to the outer side of a femoral outer side condyle in a unicondylar joint replacement operation so as to separate the knee extension device from the femoral outer side condyle. The application solves the problem that the articular surface of the patella is easy to be damaged when the traditional patella retractor is used for pulling and separating the knee extension device from the outer condyle of the femur in the unicondylar joint replacement operation.

Description

Patella retractor

Technical Field

The application relates to the technical field of orthopedic surgical instruments, in particular to a patella retractor.

Background

Good surgical field exposure is critical to the surgical procedure during orthopedic surgery. The existing patella retractor is convenient to use in total knee arthroplasty, and the patella retractor is placed on the outer side edge of a tibia platform, so that a knee extension device is pulled and separated from a femur outer side condyle, and the exposure of a knee joint outer side structure is realized.

In the unicondylar arthroplasty, the situation of the cartilage surface of the outer femoral condyle needs to be observed, and the continuous unicondylar replacement or the total knee replacement is determined, but in the unicondylar arthroplasty, the incision is narrow and is positioned at the inner side of the patella, the outer edge of the tibial plateau cannot be exposed, and the existing patella retractor cannot be placed as in the total knee arthroplasty, so that the operation of pulling and separating the knee extension device from the outer femoral condyle is difficult.

Specifically, if the tip of the existing patella retractor is placed on the lateral side of the femoral lateral condyle and forcibly pulled, the knee extension device is separated from the femoral lateral condyle, the patella retractor is easy to touch the articular surface of the patella, so that the articular surface of the patella is damaged, and therefore, the existing patella retractor cannot meet the protection requirement on the articular surface of the patella when being used in unicondylar arthroplasty.

Disclosure of Invention

The application mainly aims to provide a patella retractor which solves the problem that in the prior art, in the unicondylar joint replacement operation, when an existing patella retractor is used for pulling and separating a knee extension device from a femoral outside condyle, the articular surface of the patella is easy to damage.

In order to achieve the above object, the present application provides a patellar retractor for pulling a knee extension device to the outside of a lateral femoral condyle in a unicondylar arthroplasty to separate the knee extension device from the lateral femoral condyle, comprising: a handle; the traction part is used for supporting the outer side face of the outer side condyle of the femur, the traction part is connected with the handle, and an avoidance hole is formed in the traction part and used for avoiding the patella in the knee extension device in the process of pulling the knee extension device so as to avoid the joint surface damage of the patella.

Further, the traction part is sheet-shaped, and the surface of the traction part contacting with the lateral side of the lateral femoral condyle is matched with the shape of the lateral side of the lateral femoral condyle.

Further, the pulling portion is bent in an S shape.

Further, the traction part is sheet-shaped, and an included angle is formed between the sheet-shaped traction part and the handle.

Further, the traction part is in arc transition connection with the handle.

Further, an end of the pulling portion remote from the handle forms an insertion tip.

Further, the patella drag hook also comprises an adjusting part, the first end of the adjusting part is connected with the traction part, an adjusting space is formed between the adjusting part and the traction part, and the second end of the adjusting part forms an adjusting operation end.

Further, the two adjusting parts are in strip shape, the two adjusting parts are arranged at intervals, and the first ends of the two adjusting parts are connected with the insertion tip of the pulling part.

Further, the second ends of both adjustment portions have a hand piece.

Further, the adjustment portion extends along a curve. .

Further, the handle, the pulling part and the adjusting part are of an integrated structure.

By applying the technical scheme of the application, the traction part is inserted from the incision of the unicondylar joint replacement operation, so that the traction part is supported on the outer side surface of the outer side condyle of the femur, and meanwhile, the avoiding hole is positioned at the position of the patella, so that the traction part is prevented from touching the joint surface of the patella, and then, a user pulls the handle, and the handle drives the traction part to pull the knee extension device, so that the knee extension device is pulled and separated from the outer side condyle of the femur. The patella retractor provided by the application can effectively pull and separate the outer condyle of the femur of the patella in the unicondylar joint replacement operation without damaging the articular surface of the patella, and the practicability of the patella retractor is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

FIG. 1 shows a schematic view of a patella retractor according to an alternative embodiment of the present application;

fig. 2 shows a schematic view of the patella retractor of fig. 1 in use.

Wherein the above figures include the following reference numerals:

1. a lateral femoral condyle; 2. a knee extension device; 10. a handle; 20. a pulling part; 21. avoidance holes; 30. an adjusting part; 31. a hand piece.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The application provides a patella retractor, which aims to solve the problem that the articular surface of a patella is easy to be damaged when a patella retractor is used for pulling and separating a knee extension device from a femoral outside condyle in the unicondylar joint replacement operation in the prior art.

As shown in fig. 1 and 2, the patellar retractor is used for pulling the knee extension device 2 to the outer side of the femoral outer side condyle 1 in the unicondylar arthroplasty, so that the knee extension device 2 is separated from the femoral outer side condyle 1, the patellar retractor comprises a handle 10 and a pulling part 20, the pulling part 20 is used for supporting the outer side surface of the femoral outer side condyle 1, the pulling part 20 is connected with the handle 10, and an avoidance hole 21 is formed in the pulling part 20, and the avoidance hole 21 is used for avoiding the patella in the knee extension device 2 in the process of pulling the knee extension device 2 so as to avoid the joint surface injury of the patella.

The traction part 20 is inserted from an incision of the unicondylar arthroplasty, the traction part 20 is supported on the outer side surface of the outer side condyle 1 of the femur, and meanwhile, the avoidance hole 21 is positioned at the position of the patella, so that the traction part 20 is prevented from touching the joint surface of the patella, after that, a user pulls the handle 10, the handle 10 drives the traction part 20 to pull the knee extension device 2, and the knee extension device 2 is pulled and separated from the outer side condyle 1 of the femur.

As shown in fig. 1, the pulling portion 20 is in a sheet shape, and the surface of the pulling portion 20 in a sheet shape that contacts the lateral surface of the femoral lateral condyle 1 is adapted to the shape of the lateral surface of the femoral lateral condyle 1. The surface of the traction part 20, which is contacted with the outer side surface of the femur outer side condyle 1, is matched with the shape of the outer side surface of the femur outer side condyle 1, so that the traction part 20 can be better attached to the outer side surface of the femur outer side condyle 1, the traction part 20 is prevented from damaging the outer side surface of the femur outer side condyle 1 in the traction process, and meanwhile, the traction part 20 in a sheet shape is convenient for production and processing.

In the embodiment shown in fig. 1, the traction portion 20 is bent in an S shape, and is adapted to the shape of the lateral side of the femoral lateral condyle 1 of the human body, so that the traction portion 20 is better attached to the lateral side of the femoral lateral condyle 1, scratch on the femoral lateral condyle 1 of the human body is avoided, and the practicability of the patellar retractor is further improved.

In an embodiment of the present application, the pulling portion 20 is sheet-shaped, and an included angle is formed between the sheet-shaped pulling portion 20 and the handle 10. The patella retractor in the embodiment has a simple structure, is convenient to produce and process, and is beneficial to reducing the processing cost of the patella retractor.

In the embodiment shown in fig. 1, the pulling part 20 is connected to the handle 10 in a circular arc transition. Therefore, no edge angle exists in the patella retractor, and when the patella retractor is in contact with the femur external condyle 1 or the knee extension device 2, the patella retractor is effectively prevented from damaging the femur external condyle 1 or the knee extension device 2 due to the sharp edge angle on the surface.

As shown in fig. 1, the end of the pulling portion 20 remote from the handle 10 forms an insertion tip. In this way, insertion of the pulling portion 20 from the incision is facilitated.

As shown in fig. 1, the patella retractor further includes an adjusting portion 30, a first end of the adjusting portion 30 is connected to the pulling portion 20, an adjusting space is formed between the adjusting portion 30 and the pulling portion 20, and a second end of the adjusting portion 30 forms an adjusting operation end. When in use, the pulling part 20 and the adjusting part 30 are inserted together from the incision of the unicondylar arthroplasty, the pulling part 20 is supported on the outer side surface of the outer femoral condyle 1, meanwhile, the avoiding hole 21 is positioned at the patella position, then, a user presses the adjusting operation end of the adjusting part 30, the adjusting space between the adjusting part 30 and the pulling part 20 is increased, the knee extension device 2 is pulled and separated from the outer femoral condyle 1, and the operative field of the unicondylar arthroplasty is increased.

Because the traction part 20 is supported on the outer side surface of the femur outer side condyle 1, a user can pull and separate the knee extension device 2 from the femur outer side condyle 1 by pressing the adjusting part 30, the traction part 20 plays a role similar to a lever, the femur outer side condyle 1 and the knee extension device 2 can be effectively separated, the femur outer side condyle 1 is prevented from being pulled by the adjusting part 30 along with the knee extension device 2, meanwhile, the traction damage to quadriceps around the patella and the patellar tendon is reduced, and the practicability of the patellar drag hook is further improved.

As shown in fig. 1, the two adjusting portions 30 are in a strip shape, the two adjusting portions 30 are arranged at intervals, and the first ends of the two adjusting portions 30 are connected with the insertion tip of the pulling portion 20. The interval between the two strip-shaped adjusting parts 30 is used for avoiding the joint surface of the patella, and meanwhile, the interval between the two strip-shaped adjusting parts 30 can be adjusted according to the sizes of the patella of different patients, so that the patella adjusting device is suitable for different patients. When the patella retractor is used, the traction part 20 is supported on the outer side surface of the femoral outer side condyle 1, the interval between the two adjusting parts 30 is adjusted according to the size of the patella of a patient, after adjustment, the two adjusting parts 30 are pressed simultaneously, the knee extension device 2 is pulled and separated from the femoral outer side condyle 1, the patella is not only pulled outwards, but also lifted upwards in the process of pressing the two adjusting parts 30, the traction damage to the quadriceps around the patella and the patellar tendon is reduced, and the practicability of the patella retractor is further improved.

As shown in fig. 1, the second ends of both adjustment portions 30 have a hand piece 31. Like this, the user is operated through handpiece 31 adjustment portion 30, sets up handpiece 31 and can make things convenient for the long-term gripping of user to the use experience of patella drag hook has been promoted and has been experienced the sense of well.

Optionally, the hand piece 31 is spherical, so that when the user holds the hand piece 31 for a long time, the spherical structure can effectively avoid the user from being scratched or fluctuated by the adjusting part 30, thereby improving the use experience of the patella retractor.

As shown in fig. 1, the adjustment portion 30 extends along a curve. In this way, the adjustment portion 30 does not have an angular edge, thereby avoiding damage to the knee extension device 2 during pulling of the knee extension device 2 using the adjustment portion 30.

Alternatively, the handle 10, the pulling part 20 and the adjusting part 30 are of an integral structure. Thus, the processing and manufacturing of the patella drag hook are facilitated, the assembly process is simplified, and the production efficiency of the patella drag hook is improved.

Optionally, the length of the pull 20 is set according to the size of the femoral lateral condyle 1. The length of the pulling portion 20 must not be too long to extend into the lateral side of the lateral femoral condyle 1, which would otherwise affect the operation of the lateral femoral condyle 1.

Because the bone sizes of children and adults are greatly different, and the bone sizes of different people are also greatly deviated, in order to make the patella retractor more widely suitable for the masses, the length of the pulling part 20 can be set to be a fixed number of sizes according to the statistical result of the size data of the femoral outside condyle 1, thus being convenient for batch production and popularization and use of the patella retractor.

Optionally, the handle 10, the traction portion 20 and the adjustment portion 30 are made of stainless steel materials, and the stainless steel materials can effectively prevent the patella retractor from rusting in the use process, so that the maintenance cost of the patella retractor is reduced.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present application, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A patellar retractor for pulling a knee extension device (2) toward the outside of a femoral outside condyle (1) in a unicondylar arthroplasty to separate the knee extension device (2) from the femoral outside condyle (1), comprising:

a handle (10);

the traction part (20), the traction part (20) is used for supporting the outer side surface of the femur outer side condyle (1), the traction part (20) is connected with the handle (10), an avoidance hole (21) is formed in the traction part (20), and the avoidance hole (21) is used for avoiding the patella in the knee extension device (2) in the process of pulling the knee extension device (2) so as to avoid the joint surface injury of the patella;

the patella retractor further comprises an adjusting part (30), wherein a first end of the adjusting part (30) is connected with the traction part (20), an adjusting space is formed between the adjusting part (30) and the traction part (20), and a second end of the adjusting part (30) forms an adjusting operation end.

2. The patellar retractor according to claim 1, wherein the pulling portion (20) is in a sheet shape, and a surface of an end portion of the pulling portion (20) in a sheet shape contacting a lateral surface of the femoral lateral condyle (1) is adapted to a shape of a lateral surface of the femoral lateral condyle (1).

3. The patella retractor according to claim 2, wherein the pulling portion (20) is S-curved.

4. The patella retractor according to claim 1, wherein the pulling portion (20) is sheet-like, the pulling portion (20) being sheet-like forming an angle with the handle (10).

5. The patellar retractor according to claim 1, wherein the pulling portion (20) is connected to the handle (10) in a circular arc transition.

6. The patellar retractor according to claim 2, wherein the end of the pulling portion (20) remote from the handle (10) is the end portion, which forms an insertion tip.

7. The patella retractor according to claim 1, wherein the two adjusting portions (30) are strip-shaped, the two strip-shaped adjusting portions (30) are disposed at intervals, and first ends of the two adjusting portions (30) are connected to the insertion tip of the pulling portion (20).

8. The patellar retractor according to claim 7, wherein the second ends of both adjustment portions (30) have a hand piece (31).

9. The patellar retractor according to claim 7, wherein the adjustment portion (30) extends along a curve.

10. The patellar retractor according to claim 1, wherein the handle (10), the pulling portion (20) and the adjustment portion (30) are of unitary construction.