CN211834529U

CN211834529U - Multifunctional knee joint single condyle replacement operation incision spreader

Info

Publication number: CN211834529U
Application number: CN201922349963.3U
Authority: CN
Inventors: 杨涛; 涂意辉; 薛华明; 文涛; 马童; 薛龙; 管梦颖
Original assignee: Shanghai Yangpu Central Hospital
Current assignee: Shanghai Yangpu Central Hospital
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-11-03
Anticipated expiration: 2029-12-24

Abstract

The application relates to a multifunctional knee joint unicondylar replacement surgery incision spreader. The device comprises an adjusting and opening device and a first bearing arm and a second bearing arm which are respectively connected with the adjusting and opening device. The adjusting and opening device connects the two bearing arms in a zigzag inverted tooth meshing manner and can horizontally and transversely slide with each other; the arc-shaped section of the first bearing arm can reduce the influence caused by the height difference of the planes of the patella side incision edge and the knee inner side incision edge, and can effectively match the plane difference of the incision; the rake-shaped drag hook can pull the lateral incision edge of the patella with uniform force; the second bearing arm adopts an arc-shaped T-shaped design, can be properly inserted among the femoral condyle, the tibial platform and the medial collateral ligament, ensures that the draw hook is fixed to be clamped at a required position and cannot move up and down, can expand the medial collateral ligament of the knee inwards, plays a role in protecting the ligament from being damaged when the tibial platform cuts bones, and can effectively protect the safety of important tissues such as a posterior joint capsule in the knee and the like when the tibial platform cuts the bones.

Description

Multifunctional knee joint single condyle replacement operation incision spreader

Technical Field

The application relates to the technical field of medical equipment, in particular to a multifunctional knee joint unicondylar replacement surgery incision spreader.

Background

Currently, knee joint unicondylar replacement surgery is widely performed clinically, and compared with total knee replacement, the knee joint unicondylar replacement surgery can keep more bone mass, is closer to physiological knee joint motion function, and has better proprioception and knee joint mobility and faster recovery of patients. However, injury to the medial collateral ligament of the knee is "catastrophic" for unicondylar knee surgery, meaning failure of the unicondylar knee replacement procedure, and this injury is mostly due to intraoperative procedural injury, which is a significant challenge especially for beginners. A small incision beside a patella is adopted in knee joint unicondylar replacement surgery, the patella does not need to be turned outwards in the surgery, the operation such as osteotomy is needed to be carried out after the incision is effectively retracted by virtue of a draw hook in the surgery, and important tissues such as collateral ligaments on the inner side of the knee are easily injured when a tibial plateau is used for osteotomy. The current commonly used S-shaped retractor for the medial collateral ligament in the knee is narrow in width, and an operator cannot observe the position condition of the retractor after the retractor is placed in an incision and effectively supports and protects important tissues such as the medial collateral ligament in the knee.

The existing incision spreader 4 for knee joint unicondylar replacement surgery is provided with two annular handles 41 and two spreading arms 42 connected with the annular handles 41, wherein the tail ends of the two spreading arms 42 are respectively provided with a rake-shaped skin drag hook 43, and the two spreading arms 42 are opened and closed through a connecting shaft 40, as shown in fig. 4. After the skin and the subcutaneous tissue are cut in the operation, the rake-shaped skin drag hook 43 of the skin spreader 4 is placed into the cut incision, the annular handle 41 is controlled by two fingers to be spread to any angle according to the requirement, so that the rake-shaped skin drag hook 43 of the skin spreader 4 evenly pulls the skin and the subcutaneous tissue at two sides, and the operation of an operator is convenient. However, this structure always requires the opening/closing degree of the ring handle 41 to be controlled by fingers, requires an assistant to assist the operation, and is easily displaced during the operation.

Disclosure of Invention

The utility model aims at the weak point of above-mentioned prior art, provide a multi-functional knee joint unicondylar replacement operation incision struts ware for adopt to accomplish knee joint unicondylar replacement under the little incision of wicresoft, convenient to use can effectively protect the important tissue of knee medial collateral ligament, knee back in, prevent the iatrogenic damage that the operation arouses.

The purpose of the application is realized by the following technical scheme:

a multi-functional knee unicondylar replacement surgical incision distractor, comprising: the adjusting and opening device and the first bearing arm and the second bearing arm are respectively connected with the adjusting and opening device.

The first carrying arm comprises: the arc-shaped section is connected with the first connecting section and the first opening section, an included angle between an extension line of the first connecting section and an extension line of the first opening section is 90 degrees, the arc-shaped section has an inward radian, the first connecting section is connected with the arc-shaped section at a first end point of the arc-shaped section and forms an included angle of 60-70 degrees with a tangent line of the first end point, the first opening section is connected with the arc-shaped section at a second end point of the arc-shaped section and forms an included angle of 90 degrees with a tangent line of the second end point, the outer surface of the first connecting section is provided with a toothed upper edge, and the tail end of the first opening section is provided with a rake-shaped drag hook.

The second carrying arm comprises: the second linkage segment and the second section of strutting, the contained angle that second linkage segment and second strutting between the section is 90, the second linkage segment has an end opening's cavity, first linkage segment slidable inserts in the cavity, the upper portion of second linkage segment with adjust strutting arrangement and connect, the end that the section was strutting to the second is equipped with "T" type drag hook of an arcuation, "T" type drag hook includes an curved connecting portion and follows the drag hook portion that connecting portion extended to centre of a circle direction, the terminal edge of drag hook portion becomes the arc form.

Adjust distraction device and be equipped with adjustable locking device, include: the handle is connected with the fixed part and can rotate around a connecting shaft, the lower edge of the handle is provided with inverted teeth which can be engaged with the upper toothed edge on the first bearing arm, and a tensioning structure is arranged at the connecting shaft so that the inverted teeth can be tightly engaged with a part of the upper toothed edge when the handle is not stressed. During adjustment, the thumb presses the handle, so that the inverted teeth on the lower edge of the handle are in an open state under the action of the tensioning structure, the length of the first connecting section of the first bearing arm inserted into the cavity of the second bearing arm is adjusted in a sliding mode until the notch is spread to a proper position, the handle is released, the tensioning structure returns, the inverted teeth on the lower edge of the handle restore to the horizontal position, and the inverted teeth reset and are occluded, so that the two bearing arms are fixed.

Wherein, the tension structure can be a spring plate. After the handle receives the power towards the fixed part, spring leaf elastic bending, the pawl of handle lower edge is open state, releases the handle, and the spring leaf kick-backs straightly, and the pawl of handle lower edge resumes horizontal position, and the pawl interlock that resets to two fixed bearing arms.

When the knee joint retractor is used, the angle of the T-shaped retractor is adjusted, the T-shaped retractor is inserted in the direction of the tibial plateau and the medial groove of the knee, the T-shaped retractor is just clamped among the femoral condyle, the tibial plateau and the medial collateral ligament of the knee, and the medial collateral ligament of the knee can be expanded inwards; the arc-shaped section at the rear part of the drag hook is inserted into the rear part of the tibial platform to prop open the rear joint capsule in the knee in a limited way. Then, the rake-shaped retractor is used for retracting the patella side incision edge by means of the adjusting and opening device, the two bearing arms are manually opened in the inner and outer directions, and the adjusting and opening device is meshed with the sawtooth-shaped inverted teeth of the first bearing arm step by step until the incision is opened to a proper position, so that the incision is conveniently exposed, and the inner collateral ligament is more safely protected from being damaged when the tibial platform cuts the bone.

According to the multifunctional knee joint unicondylar replacement surgery incision spreader, the two bearing arms are connected by the adjusting spreading device in a zigzag inverted tooth meshing mode, and can horizontally and transversely slide mutually; the special design of the arc-shaped section of the first bearing arm can reduce the influence caused by the height difference of the planes of the patella side incision edge and the knee inner side incision edge, and can effectively match the plane difference of the incision; the rake-shaped drag hook can pull the lateral incision edge of the patella with uniform force; the second bearing arm adopts an arc-shaped T-shaped design, can be properly inserted among the femoral condyle, the tibial platform and the medial collateral ligament, ensures that the draw hook is fixed to be clamped at a required position and cannot move up and down, can not only inwards prop open the medial collateral ligament of the knee, plays a role in protecting the ligament from being damaged when the tibial platform cuts bones, but also can effectively protect the safety of important tissues such as a posterior joint capsule in the knee and the like when the tibial platform cuts the bones. The utility model provides a multi-functional knee joint unicondylar replacement operation incision struts ware can conveniently carry out manual controllable incision effectively to strut under the little incision of wicresoft, and the important tissue such as the protection knee medial collateral ligament of maximize just only needs alone can accomplish the operation, labour saving and time saving.

Drawings

FIG. 1 is a schematic view of a preferred embodiment of the present multifunctional knee unicondylar replacement surgical incision distractor.

Fig. 2 is a schematic structural view of a use state of the embodiment shown in fig. 1. To better illustrate how this is used, the thigh A, calf B, patella C, surgical incision D, tibia E, femoral condyle F are shown as references.

Fig. 3 is a partially enlarged view of the connection between the adjustment distractor and the first and second bearing arms of the embodiment shown in fig. 1.

FIG. 4 is a schematic view of a prior art incision distractor for use in knee unicondylar replacement surgery.

Detailed Description

The present application is further described with reference to the following drawings and examples, but the present application is not limited to the following examples, and all similar structures and similar variations thereof should be included in the scope of the present application.

The multi-functional knee unicondylar replacement surgery incision distractor shown in fig. 1 comprises: an adjusting and opening device 1, and a first bearing arm 2 and a second bearing arm 3 which are respectively connected with the adjusting and opening device 1.

The first carrier arm 2 comprises: the first connecting section 21, the arc section 22 and the first opening section 23, the arc section 22 has an inward curvature and is located between the first connecting section 21 and the first opening section 23, the outer surface of the first connecting section 21 has a toothed upper edge 210, and the end of the first opening section 23 is provided with a rake-shaped hook 24. The first end point of the arc-shaped section 22 is connected with the first connecting section 21, and the first connecting section 21 and the tangent of the first end point of the arc-shaped section 22 form an included angle of 60-70 degrees; the second end point of the arc segment 22 is connected to the first flared segment 23, the first flared segment 23 forms an angle of 90 ° with the tangent of the second end point of the arc segment 22, and the angle between the extension of the first connection segment 21 and the extension of the first flared segment 23 is substantially 90 °.

The second carrier arm 3 includes: the included angle between the second connecting section 31 and the second expanding section 32 is substantially 90 °, the second connecting section 31 has a cavity 33 with an opening end, the first connecting section 21 is slidably inserted into the cavity 33, the upper portion of the second connecting section 31 is connected with the adjusting and expanding device 1, the end of the second expanding section 32 is provided with an arc-shaped T-shaped draw hook 34, the T-shaped draw hook 34 comprises an arc-shaped connecting portion 341 and a draw hook portion 342 extending from the connecting portion 341 to the circle center direction, and the end edge of the draw hook portion 342 is arc-shaped.

As shown in fig. 3, the adjusting and distracting device 1 is provided with an adjustable locking device, which comprises: a fixed part 11 and a handle 12 connected with the fixed part 11 and rotatable around a connecting shaft, wherein the lower edge of the handle 12 is provided with inverted teeth 120 which can be engaged with the upper edge 210 of the teeth on the first bearing arm 21, and a spring leaf 13 is arranged at the connecting shaft. During adjustment, a thumb presses the handle 12 in the direction of an arrow H, the spring piece 13 is elastically bent, the pawl 120 on the lower edge of the handle is in an open state, the length of the first connecting section 21 of the first bearing arm 2 inserted into the cavity 33 of the second bearing arm 31 is adjusted in a sliding mode until the notch is spread to a proper position, the handle 12 is released, the spring piece 13 rebounds and is straight, the pawl 120 on the lower edge of the handle 12 restores to a horizontal position, and the pawl 120 resets and engages, so that the two bearing arms are fixed.

When in use, as shown in fig. 2, the angle of the T-shaped draw hook 34 is adjusted, and the T-shaped draw hook is inserted along the direction of the tibial plateau and the medial knee sulcus, so that the T-shaped draw hook is just clamped among the femoral condyle, the tibial plateau and the medial knee ligament, and the medial knee ligament can be expanded inwards; the arc-shaped section at the rear part of the drag hook is inserted into the rear part of the tibial platform to prop open the rear joint capsule in the knee in a limited way. Then, the rake-shaped retractor is used for retracting the patella side incision edge by means of the adjusting and opening device, the two bearing arms are manually opened in the inner and outer directions, and the adjusting and opening device is meshed with the sawtooth-shaped inverted teeth of the first bearing arm step by step until the incision is opened to a proper position, so that the incision is conveniently exposed, and the inner collateral ligament is more safely protected from being damaged when the tibial platform cuts the bone.

The above description is only illustrative of the preferred embodiments of the present application and is not intended to limit the scope of the present application in any way. Any changes or modifications made by those skilled in the art based on the above disclosure should be considered as equivalent effective embodiments, and all the changes or modifications should fall within the protection scope of the technical solution of the present application.

Claims

1. A multi-functional knee joint unicondylar replacement surgery incision spreader which is characterized by comprising: the device comprises an adjusting and opening device, a first bearing arm and a second bearing arm, wherein the first bearing arm and the second bearing arm are respectively connected with the adjusting and opening device;

the first carrying arm comprises: the first connection section is connected with the first spreading section, an included angle between an extension line of the first connection section and an extension line of the first spreading section is 90 degrees, the arc section has an inward radian, the first connection section is connected with the arc section at a first end point of the arc section and forms an included angle of 60-70 degrees with a tangent line of the first end point, the first spreading section is connected with the arc section at a second end point of the arc section and forms an included angle of 90 degrees with a tangent line of the second end point, the outer surface of the first connection section is provided with a toothed upper edge, and the tail end of the first spreading section is provided with a rake-shaped drag hook;

the second carrying arm comprises: the angle between the second connecting section and the second spreading section is 90 degrees, the second connecting section is provided with a cavity with an opening end, the first connecting section is slidably inserted into the cavity, the upper part of the second connecting section is connected with the spreading adjusting device, the tail end of the second spreading section is provided with an arc-shaped T-shaped drag hook, the T-shaped drag hook comprises an arc-shaped connecting part and a drag hook part extending from the connecting part to the circle center direction, and the tail end edge of the drag hook part is arc-shaped;

adjust distraction device and be equipped with adjustable locking device, include: the handle is connected with the fixed part and can rotate around a connecting shaft, the lower edge of the handle is provided with inverted teeth which can be engaged with the upper toothed edge on the first bearing arm, and a tensioning structure is arranged at the connecting shaft so that the inverted teeth can be tightly engaged with a part of the upper toothed edge when the handle is not stressed.

2. The multi-functional knee unicondylar replacement surgical incision distractor of claim 1, wherein: the tensioning structure is a spring piece.