Posterior cruciate ligament protection device for total knee arthroplasty

Abstract

The invention discloses a posterior cruciate ligament protection device for total knee arthroplasty, which comprises two strip-shaped plates, a protective cover is arranged between the two strip-shaped plates, the surface of the protective cover is provided with rhombic holes, and the surface of the protective cover is provided with grooves. According to the posterior cruciate ligament protection device, the strip-shaped plate and the protection cover are unfolded and surround the surface of the posterior cruciate ligament, the two side edges of the protection cover are connected together through the magnetic attraction effect of the magnets, then the posterior cruciate ligament can be completely wrapped, a bone saw is blocked outside the protection cover, an operator can conduct operation at ease, the operation time is shortened, and the operation efficiency is improved. And secondly, the whole protective cover is of a net-shaped structure and has the characteristic of being easy to deform, so that the protective cover can be adjusted in real time according to the actual length of the posterior cruciate ligament, and the practicability of the device is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical equipment, in particular to a posterior cruciate ligament protection device for total knee replacement. Background Art

[0002] Artificial knee replacement is an effective method for treating severe osteoarthritis of the knee joint. Depending on whether the posterior cruciate ligament is retained during the operation, artificial knee replacement can be divided into two types, one is artificial knee replacement with the posterior cruciate ligament removed, and the other is artificial knee replacement with the posterior cruciate ligament retained. The advantages of retaining the posterior cruciate ligament include less surgical trauma, bone retention, proprioception, joint stability, etc. When performing tibial plateau osteotomy during artificial knee replacement, a bone saw is usually used to perform a plane cut on the tibial plateau from front to back. During this process, the bone saw can easily saw the posterior cruciate ligament that ends at the center of the posterior part of the tibial plateau, resulting in ligament damage, fracture and loss of function. If the posterior cruciate ligament is to be retained, the posterior cruciate ligament must be protected during the operation to avoid bone saw damage. In the prior art, a bone knife can be used to insert the front of the posterior cruciate ligament to block the bone saw during the operation. However, bone knife instruments have the disadvantages of large size and difficult operation, and it is not easy to grasp the insertion depth. Too shallow has no protective effect, and too deep will damage the bone around the ligament and cause fractures.

[0003] After searching, the application number is: CN201610037625.4. A posterior cruciate ligament protection device for total knee replacement belongs to the field of medical devices. The fixed guard plate has a groove structure on the inner surface, so it can wrap and protect the posterior cruciate ligament and the lower end of the posterior cruciate ligament, preventing the lower end of the tibial side of the posterior cruciate ligament from being fractured during surgery.

[0004] When the above invention is used, the cutting edge needs to be driven into the bone of the tibial plateau. If the depth of the nail is shallow, its stability is poor and it is easy to shake during the operation. If the depth of the nail is deep, the bone surface attached to the posterior cruciate ligament is easily damaged, and the overall effect of the operation cannot be guaranteed.

[0005] In order to solve the above problems, the present application provides a posterior cruciate ligament protection device for total knee replacement. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a posterior cruciate ligament protection device for total knee replacement.

[0007] The objective of the present invention is achieved through the following technical scheme: a posterior cruciate ligament protection device for total knee replacement, comprising a strip plate, a protective cover is arranged between two of the strip plates, a diamond-shaped hole is opened on the surface of the protective cover, a groove is opened on the surface of the protective cover, and a magnet is bonded in the groove by an adhesive, and a sleeve is welded on the outer side of the strip plate.

[0008] Preferably, the magnets are provided in two groups, and the two groups of magnets are respectively arranged on two sides of the protective cover, with the positive poles of one group of magnets facing outwards and the negative poles of the other group of magnets facing outwards.

[0009] Preferably, the strip plate is made of spring steel.

[0010] Preferably, a plurality of the diamond-shaped holes are provided, and the plurality of the diamond-shaped holes are distributed on the surface of the protective cover in a rectangular array.

[0011] Preferably, the protective cover is made entirely of titanium metal.

[0012] Preferably, the strip plate and the protective cover are arranged in a welded one-piece structure.

[0013] The present invention has the following advantages:

[0014] 1. In the present invention, the strip plate and the protective cover are unfolded and wrapped around the surface of the posterior cruciate ligament. The magnetic attraction of the magnet is used to connect the two sides of the protective cover together, so that the posterior cruciate ligament can be fully wrapped, and the bone saw is blocked outside the protective cover, so that the surgeon can operate with confidence, shorten the operation time, and ensure that the posterior cruciate ligament and surrounding bones will not be injured, which greatly improves the practicality of the device. Secondly, the protective cover has a mesh structure as a whole and has the characteristic of being easy to deform, so that the protective cover can be adjusted in real time according to the actual length of the posterior cruciate ligament, further improving the practicality of the device.

[0015] 2. In the present invention, magnets of different surfaces are arranged on both sides of the protective cover, and the magnetic attraction characteristics of the magnets are utilized to make the connection or separation of the two sides of the protective cover very convenient, thereby facilitating the installation or removal of the protective cover and greatly improving the convenience of use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of the back structure;

[0019] Figure 3 It is a schematic diagram of the structure of the protective cover;

[0020] Figure 4 It is a schematic diagram of the side structure.

[0021] In the figure, 1- strip plate, 2- protective cover, 3- diamond hole, 4- magnet, 5- groove, 6- sleeve. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] like Figure 1-4 As shown, a posterior cruciate ligament protection device for total knee replacement surgery includes a strip plate 1, a protective cover 2 is arranged between two strip plates 1, a diamond hole 3 is opened on the surface of the protective cover 2, a groove 5 is opened on the surface of the protective cover 2, and a magnet 4 is bonded in the groove 5 by an adhesive, a sleeve 6 is welded on the outer side surface of the strip plate 1, a plurality of diamond holes 3 are opened, and the plurality of diamond holes 3 are distributed on the surface of the protective cover 2 in a rectangular array.

[0029] In one embodiment, the strip plate 1 and the protective cover 2 are unfolded and wrapped around the surface of the posterior cruciate ligament. The magnetic attraction of the magnet 4 is used to connect the two sides of the protective cover 2 together, so that the posterior cruciate ligament can be fully wrapped, and the bone saw is blocked outside the protective cover 2, so that the surgeon can operate with confidence, shorten the operation time, and ensure that the posterior cruciate ligament and surrounding bones will not be injured, which greatly improves the practicality of the device. Secondly, the protective cover 2 has a mesh structure as a whole and is easy to deform, so that the protective cover 2 can be adjusted in real time according to the actual length of the posterior cruciate ligament, further improving the practicality of the device.

[0030] Specifically, two groups of magnets 4 are provided. The two groups of magnets 4 are respectively provided on two sides of the protective cover 2 , with the positive pole of one group of magnets 4 facing outwards and the negative pole of the other group of magnets 4 facing outwards.

[0031] In one embodiment, after the protective cover 2 is wrapped around the posterior cruciate ligament, the two side edges of the protective cover 2 are magnetically attracted together by the magnetic attraction of the two groups of magnets 4, so as to tightly wrap and protect the posterior cruciate ligament.

[0032] Specifically, the strip plate 1 is made of spring steel.

[0033] In one embodiment, by utilizing the excellent elastic properties of spring steel, external force is applied to unfold the strip plate 1, which is then wrapped around the posterior cruciate ligament. After the external force is withdrawn, the strip plate 1 will automatically return to its original position, forming a ring shape and wrapping around the surface of the posterior cruciate ligament.

[0034] Specifically, the protective cover 2 is made of titanium metal as a whole.

[0035] In one embodiment, titanium metal has the characteristics of being easily deformed and not easily corroded by blood, so after coming into contact with the posterior cruciate ligament, no allergies will occur, thus greatly ensuring postoperative safety.

[0036] Specifically, the strip plate 1 and the protective cover 2 are arranged in a welded integrated structure.

[0037] In one embodiment, welding has the advantages of good connection performance, high structural rigidity, good integrity, etc., so that the strip plate 1 and the protective cover 2 are not easy to separate and disconnect.

[0038] The working process of the present invention is as follows: the strip plate 1 and the protective cover 2 are unfolded and wrapped around the surface of the posterior cruciate ligament, and the magnetic attraction of the magnet 4 is used to connect the two sides of the protective cover 2 together, so that the posterior cruciate ligament can be fully wrapped, and the bone saw is blocked outside the protective cover 2, so that the surgeon can operate with confidence, shorten the operation time, and ensure that the posterior cruciate ligament and the surrounding bones will not be injured, which greatly improves the practicality of the device. Secondly, the protective cover 2 has a mesh structure as a whole and has the characteristic of being easy to deform, so that the protective cover 2 can be adjusted in real time according to the actual length of the posterior cruciate ligament, further improving the practicality of the device; magnets 4 with different surfaces are respectively arranged on both sides of the protective cover 2, and the magnetic attraction characteristics of the magnet 4 are used to make it very convenient to connect or separate the two sides of the protective cover 2, thereby facilitating the installation or removal of the protective cover 2, greatly improving the convenience of use of the device.

[0039] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A posterior cruciate ligament protection device for total knee replacement, comprising a strip plate (1), characterized in that: A protective cover (2) is arranged between the two strip plates (1), a diamond-shaped hole (3) is provided on the surface of the protective cover (2), a groove (5) is provided on the surface of the protective cover (2), and a magnet (4) is bonded in the groove (5) by an adhesive, and a sleeve (6) is welded to the outer side surface of the strip plate (1).

2. A posterior cruciate ligament protection device for total knee replacement according to claim 1, characterized in that: The magnets (4) are provided in two groups, and the two groups of magnets (4) are respectively provided on two sides of the protective cover (2), the positive poles of one group of magnets (4) are outwards, and the negative poles of the other group of magnets (4) are outwards.

3. The posterior cruciate ligament protection device for total knee replacement according to claim 1, characterized in that: The strip plate (1) is made of spring steel.

4. The posterior cruciate ligament protection device for total knee replacement according to claim 1, characterized in that: A plurality of the diamond-shaped holes (3) are provided, and the plurality of the diamond-shaped holes (3) are distributed on the surface of the protective cover (2) in a rectangular array.

5. The posterior cruciate ligament protection device for total knee replacement according to claim 1, characterized in that: The protective cover (2) is entirely made of titanium metal.

6. The posterior cruciate ligament protection device for total knee replacement according to claim 1, characterized in that: The strip plate (1) and the protective cover (2) are arranged in a welded integrated structure.

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