Tendon protector for knee joint cruciate ligament reconstruction

Abstract

A tendon protector for knee joint cruciate ligament reconstruction is used for guiding tendons to enter a femoral tunnel and is characterized by comprising a guide head and an operating handle, the guide head can be embedded into an entrance of the femoral tunnel and comprises a guide head body and an opening, and the opening extends inwards from the side face of the guide head body and allows the tendons to be laterally separated from the guide head body; a guide channel opposite to the femur tunnel is formed in the guide head body, and the opening is communicated with the guide channel; the operating handle is connected with the guide head body and comprises a bent avoiding section which is connected with the guide head body and extends upwards in a bent mode and a handheld section which is connected with the upper end of the bent avoiding section and extends upwards. The structure of the tendon protector is specifically limited, the guide head capable of being embedded into the femoral tunnel entrance is arranged to guide the tendon to enter the femoral tunnel, the folding angle is reduced, the tendon smoothly enters the femoral tunnel, and transplantation of the tendon is more convenient to complete.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of knee joint ligament treatment device, concretely relates to a tendon protector for knee joint cross ligament reconstruction. BACKGROUND

[0002] Knee arthroscopy cross ligament reconstruction surgery needs to carry out complex tendon transplantation operation, in the ligament reconstruction process, tendon enters from tibial tunnel, is pulled to femoral tunnel through non-absorbable line, since there is a certain angle in the entrance of femoral tunnel, especially when the corner is big in the reconstruction of posterior cruciate ligament, tendon is not easy to pull into femoral tunnel when entering the entrance of femoral tunnel, and tendon is easy to cut, thereby being easy to cause the extension of operation time and operation failure, and there is the risk of postoperative ligament retearing. CONTENT OF UTILITY MODEL

[0003] The utility model aims at overcoming the shortcomings of prior art, and provides a tendon protector for knee joint cross ligament reconstruction.

[0004] The utility model adopts the following technical scheme:

[0005] A tendon protector for knee joint cross ligament reconstruction is used for guiding tendon to enter femoral tunnel, and is characterized by comprising a guide head and an operating handle,

[0006] The guide head can be embedded into the entrance of femoral tunnel, and comprises a guide head body and an opening extending inward from the side of the guide head body for the lateral separation of tendon from the guide head body, a guide channel opposite to the femoral tunnel is formed in the guide head body, and the opening is communicated with the guide channel;

[0007] The operating handle is connected with the guide head body, and comprises a curved avoiding section extending upward and connected with the guide head body and a hand holding section extending upward and connected with the upper end of the curved avoiding section.

[0008] Further, the diameter of the guide head body gradually decreases along the direction of tendon entering the femoral tunnel.

[0009] Further, the curved avoiding section forms an arc transition surface with the opposite surface of the joint surface.

[0010] Further, the curved avoiding section comprises a connecting section connected with the guide head body and an arc transition section curved upward and connected with the connecting section, and the arc transition surface extends upward from the outer side of the connecting section to the outer side of the arc transition section.

[0011] Further, the guide head body forms a first chamfer with the opposite surface of the inward movement of tendon.

[0012] Further, the opposite two sides of the opening form a second chamfer.

[0013] Further, the guide head body is integrally formed with the curved avoiding section.

[0014] Further, the outer side surface of the handheld section is arc-shaped.

[0015] From the above description of the utility model, compared with the prior art, the beneficial effects of the utility model are: the structure of the tendon protector is specifically defined, the guide head embedded in the femoral tunnel entrance is arranged to guide the tendon into the femoral tunnel, reduce the folding angle, and make the tendon smoothly enter the femoral tunnel, which is more convenient for completing the tendon transplantation; in addition, the first chamfer is arranged on the opposite surface of the guide head and the tendon entering direction, a smooth contact surface is formed instead of a rough femoral tunnel surface, the cutting of the tendon entering is reduced, the tendon is protected, the tendon is prevented from being torn due to cutting, surgical failure is prevented, and the success rate of the operation is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure diagram of the tendon protector Figure 1

[0017] Figure 2 It is a structure diagram of the tendon protector Figure 2

[0018] Figure 3 It is a structure diagram of the tendon protector Figure 3

[0019] Figure 4 It is a cooperation diagram of the tendon protector and the knee joint

[0020] In the figure, 1 is a guide head, 2 is an operating handle, 11 is a guide head body, 12 is an opening, 13 is a guide channel, 14 is a first chamfer, 15 is a second chamfer, 21 is a curved avoiding section, 22 is a handheld section, 23 is an arc-shaped transition surface, 24 is a connecting section, and 25 is an arc-shaped transition section. DETAILED DESCRIPTION

[0021] The utility model is further described through specific embodiments.

[0022] Referring to Figures 1 to 4 Fig. 1, a tendon protector for knee joint cross ligament reconstruction is used for guiding the tendon into a femoral tunnel and comprises a guide head 1 and an operating handle 2.

[0023] ​​​The guide head 1 can be embedded into the femoral tunnel entrance, and includes a guide head body 11 and an opening 12 extending inward from the side of the guide head body 11 for the tendon to laterally separate from the guide head body 11. A guide channel 13 is formed inside the guide head body 11 opposite the femoral tunnel for the tendon to enter. The opening 12 is in communication with the guide channel 13. By arranging the guide head 1 that can be embedded into the femoral tunnel entrance, the tendon is guided to enter the femoral tunnel, the folding angle is reduced, the tendon smoothly enters the femoral tunnel, and the tendon transplantation is facilitated. The diameter of the guide head body 11 gradually decreases along the direction of the tendon entering the femoral tunnel. The diameter of the upper end is 9-10 mm, and the diameter of the lower end is 10-12 mm. Specifically, a first chamfer 14 is formed on the opposite surface of the guide head body 11 and the tendon moves inward. The first chamfer 14 is arranged on the guide head body 11 to form a smooth surface on the opposite surface of the guide head body 11 and the tendon moves inward, which replaces the rough surface of the femoral tunnel entrance, reduces the cutting of the tendon entering the femoral tunnel, protects the tendon, prevents the tendon from tearing due to cutting, causes the operation to fail, and improves the success rate of the operation. Further, the opposite two sides of the opening 12 are formed with a second chamfer 15 to ensure that when the guide head is removed after the tendon is installed, the opening 12 will not damage the tendon

[0024] The operating handle 2 is connected with the guide head body 11 and includes a curved avoiding section 21 that is bent upward and extends from the guide head body 11, and a hand holding section 22 that is connected with the upper end of the curved avoiding section 21 and extends upward. The guide head body 11 and the curved avoiding section 21 are integrally formed. Specifically, an arc transition surface 23 is formed on the opposite surface of the curved avoiding section 21 and the joint surface. The curved avoiding section 21 includes a connecting section 24 connected with the guide head body 11 and an arc transition section 25 that is curved upward and connected with the connecting section 24. By arranging the curved avoiding section 21, the operating handle 2 can avoid the joint surface and the ligament, and avoid damaging the joint surface and the ligament. The outer side of the hand holding section 22 is arc-shaped. The arc transition section 25 extends upward from the outer side of the connecting section 24 to the outer side of the arc transition section 25. Further, the curvature of the curved avoiding section is about 65-75°.

[0025] When the tendon protector defined in the embodiments of the present application is used to perform the knee joint cross reconstruction surgery, the following steps are specifically included:

[0026] Step one, explore the situation in the knee joint, and use a planer to remove the cross ligament stump, inflammatory synovium and other tissues;

[0027] Step two, use a femoral positioner to establish a femoral tunnel, and select a steel loop plate with a proper length according to the length of the femoral tunnel;

[0028] Step three, embed the guide head 1 into the entrance of the femoral tunnel by hand operating the handle 2, so that the guide channel 13 is opposite to the femoral tunnel;

[0029] Step four, using the loop steel plate connection tendon after the guide channel 13, tendon implantation in femoral tunnel, confirm the loop steel plate fixed, in the tibial tunnel using extrusion nail fixed tendon, arthroscopic again to explore the strength and function of the reconstructed ligament;

[0030] Step five, physiological saline flush incision, suture after auxiliary material cover bandage.

[0031] In summary, the application specifically limits the structure of the tendon protector, the guide head 1 embedded in the femoral tunnel entrance is set to guide the tendon into the femoral tunnel, reduce the folding angle, so that the tendon smoothly into the femoral tunnel, more convenient to complete the tendon transplantation; In addition, the first chamfer 14 is arranged on the opposite surface of the guide head 1 and the direction of the tendon, forming a smooth contact surface instead of the rough femoral tunnel surface, reducing the cutting of the tendon into, protecting the tendon, preventing the tendon from tearing due to cutting, leading to the failure of the operation, and improving the success rate of the operation.

[0032] The above is only the preferred embodiment of the present application, therefore cannot limit the scope of the present application, that is, the equivalent changes and modifications made according to the scope of the present application and the content of the specification should still be within the scope of the present application.

Claims

1. A tendon protector for knee cruciate ligament reconstruction, used to guide the tendon into the femoral tunnel, characterized in that: Includes guide head and operating handle, A guide head, which can be embedded in the femoral tunnel entrance, includes a guide head body and an opening extending inward from the side of the guide head body for the tendon to laterally detach from the guide head body. The guide head body has a guide channel formed inside that is opposite to the femoral tunnel, and the opening communicates with the guide channel. The operating handle is connected to the guide head body and includes a bending clearance section that extends upward and is connected to the guide head body, and a handheld section that extends upward and is connected to the upper end of the bending clearance section.

2. The tendon protector for knee cruciate ligament reconstruction according to claim 1, characterized in that: The diameter of the guide head body gradually decreases along the direction in which the tendon enters the femoral tunnel.

3. The tendon protector for knee cruciate ligament reconstruction according to claim 1, characterized in that: The bending clearance section and the opposite surface of the joint surface form an arc-shaped transition surface.

4. The tendon protector for knee cruciate ligament reconstruction according to claim 3, characterized in that: The bending avoidance section includes a connecting section connected to the guide head body and an upwardly curved transition section connected to the connecting section. The curved transition surface extends upward from the outer side of the connecting section to the outer side of the curved transition section.

5. The tendon protector for knee cruciate ligament reconstruction according to claim 1, characterized in that: The guide head body and the opposing surface of the tendon moving inward form a first chamfer.

6. The tendon protector for knee cruciate ligament reconstruction according to claim 1, characterized in that: The two opposite sides of the opening have a second chamfer.

7. The tendon protector for knee cruciate ligament reconstruction according to claim 1, characterized in that: The guide head body and the bending avoidance section are integrally formed.

8. The tendon protector for knee cruciate ligament reconstruction according to claim 1, characterized in that: The outer surface of the handheld segment is curved.

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