Protective guide device for knee joint meniscus repair operation

Abstract

The invention discloses a protection guiding device for a knee joint meniscus repair operation, and relates to the technical field of medical instruments, the protection guiding device comprises an elastic connecting pipe, the upper end of the elastic connecting pipe is communicated with a guiding fixing plate, the lower end of the elastic connecting pipe is communicated with a special-shaped guiding hose, and a dielectric elastomer is wrapped in the pipe wall of the special-shaped guiding hose. According to the protection guiding device for the knee joint meniscus repair operation, bending guiding is achieved in a narrow knee joint through a flexible material, the guiding effect is enhanced, disturbance to tissue of the knee joint of a patient is small, meanwhile, long-time expansion of a wound of the patient is avoided, postoperative wound healing is facilitated, and the comfort level of the patient is improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a protective guide for knee meniscus repair surgery. Background Art

[0002] The knee joint has medial and lateral crescent-shaped bones on the tibial articular surface, called menisci. The edges are thicker and closely connected to the joint capsule, while the center is thinner and free. Normal menisci increase the concavity of the tibial condyle and cushion the medial and lateral condyles of the femur to increase the stability of the joint and buffer shock.

[0003] A torn meniscus in the knee joint cannot repair itself and requires surgical treatment. When the torn meniscus is located in the white area (the area without blood vessels), there are no conditions for healing. The torn part can be removed and smoothed. When the torn meniscus is located in the red area (the area with blood vessels), it is possible to heal and the meniscus can be repaired by suturing. When the posterior horn of the meniscus is torn using the inside-out repair technique, the puncture needle can easily damage the important blood vessels and nerves behind the knee joint. Once the consequences of the injury are serious, a guide head is needed to reach the knee joint to be repaired in advance for guidance, and guide the tool to the surgical area.

[0004] The current guide for knee meniscus repair surgery uses a hard and non-contractible method to expand the wound. During prolonged knee meniscus repair surgery, the guide will cause the wound to expand, further affecting the elasticity of the skin around the wound, which is not conducive to postoperative suturing. In addition, the guide device mostly uses a hard metal tube for guidance, which cannot be bent inside the narrow knee joint, and the guiding effect is poor. During the guidance process, damage to other tissues in the knee joint is inevitable. At the same time, the guide is large in size, which increases the opening area, which is not conducive to later healing.

[0005] How to develop a protective guide for knee meniscus repair surgery, using flexible materials to achieve bending guidance inside the narrow knee joint, enhancing the guiding effect with less disturbance to the tissue of the patient's knee joint, while avoiding long-term expansion of the patient's wound, facilitating postoperative wound healing, and improving patient comfort, has become a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0006] The purpose of the present invention is to provide a protective guide for knee meniscus repair surgery to solve the problems listed in the background technology.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] The invention discloses a protective guide for knee meniscus repair surgery, comprising an elastic connecting tube, the upper end of which is connected to a guide fixing plate, the lower end of which is connected to a special-shaped guiding hose, and the tube wall of the special-shaped guiding hose is coated with a dielectric elastomer.

[0009] Preferably, the guide fixing plate is in a bell-mouth shape.

[0010] Preferably, the lower side of the guide fixing plate is connected to an external traction airbag.

[0011] Preferably, a built-in anchoring body is connected to the outer peripheral surface of one end of the special-shaped guide hose, and the installation position of the built-in anchoring body is close to the connection end between the elastic connecting tube and the special-shaped guide hose;

[0012] The other end of the special-shaped guide hose is connected with a flexible protective head.

[0013] Preferably, a perfusion port is provided on the outer side wall of the guide fixing plate, a perfusion tube is provided inside the guide fixing plate, and one end of the perfusion tube is connected to the perfusion port.

[0014] Preferably, the other end of the perfusion tube is connected to the external traction balloon and the internal anchor body respectively.

[0015] Preferably, the special-shaped guide hose is divided into a telescopic zone and a torsion zone, and the inner wall of the tube at the telescopic zone is spirally coated with a tubular dielectric elastomer;

[0016] A plurality of wavy dielectric elastomers are coated at equal intervals in the tube wall at the torsion zone;

[0017] The tubular dielectric elastomer and the wavy dielectric elastomer are connected to an external controller through a pipeline in the special-shaped guide hose.

[0018] Compared with the prior art, the beneficial technical effects of the present invention are:

[0019] 1) The elastic connecting tube is located at the wound of the patient, and the wound of the patient can compress the elastic connecting tube, which can effectively avoid the expansion of the wound and increase the comfort of the patient during the operation;

[0020] 2) The guide fixing plate can not only guide the instruments in the repair surgery, but also form a sterile area at the patient's knee, solving the problem that it is difficult to place a drape at the patient's knee during surgery;

[0021] 3) The wall of the special-shaped guide hose is coated with a dielectric elastomer, which can cause the dielectric elastomer to undergo compression deformation in the thickness direction and expansion deformation in the plane direction through changes in the electric field, thereby driving the special-shaped guide hose 5 to turn inside the narrow knee joint, providing guidance for the instruments in the process of meniscus repair of the knee joint, and preventing the surgical instruments from causing damage to other areas of the patient;

[0022] 4) The special-shaped guide hose can be compressed, and a smaller incision is required to place the special-shaped guide hose into the patient's knee joint, with less disturbance to other tissues inside the patient's knee joint.

[0023] In general, a protective guide for knee meniscus repair surgery uses flexible materials to achieve bending guidance inside the narrow knee joint, which enhances the guiding effect and causes less disturbance to the tissues in the patient's knee joint. At the same time, it avoids long-term expansion of the patient's wound, facilitates postoperative wound healing, and improves the patient's comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 A cross-sectional view of the working state of a protective guide for knee meniscus repair surgery according to the present invention Figure 1 (External traction airbag, internal anchor body and telescopic zone extension working state);

[0026] Figure 2 A cross-sectional view of the working state of a protective guide for knee meniscus repair surgery according to the present invention Figure 2 (External traction airbag, internal anchor body and telescopic zone contracted working state);

[0027] Figure 3 A cross-sectional view of the working state of a protective guide for knee meniscus repair surgery according to the present invention Figure 3 (Working status of external traction airbag, internal anchor and torsion zone);

[0028] Figure 4 It is a cross-sectional view of a non-working state of a protective guide for knee meniscus repair surgery according to the present invention;

[0029] Figure 5 It is a three-dimensional schematic diagram of a non-working state of a protective guide for knee meniscus repair surgery according to the present invention.

[0030] Explanation of the reference numerals: 1. Guide fixing plate; 2. External traction airbag; 3. Elastic connecting tube; 4. Internal anchor body; 5. Special-shaped guide hose; 501. Telescopic zone; 502. Torsion zone; 6. Flexible protective head; 7. Infusion port; 8. Infusion tube; 9. Tubular dielectric elastomer; 10. Wavy dielectric elastomer. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] like Figure 1-5 As shown, a protective guide for knee meniscus repair surgery includes an elastic connecting tube 3, the upper end of the elastic connecting tube 3 is connected to the guide fixing plate 1, and the lower end of the elastic connecting tube 3 is connected to the special-shaped guide hose 5, and the tube wall of the special-shaped guide hose 5 is coated with a dielectric elastomer, wherein the elastic connecting tube 3 is located at the wound of the patient, and the wound of the patient can compress the elastic connecting tube 3, which can effectively avoid the expansion of the wound and increase the comfort of the patient during the operation;

[0033] At the same time, the guide fixing plate 1 can not only guide the instruments in the repair surgery, but also form a sterile area at the patient's knee, solving the problem that it is difficult to place a drape at the patient's knee during surgery.

[0034] Furthermore, the wall of the special-shaped guide hose 5 is coated with a dielectric elastomer, which can cause the dielectric elastomer to undergo compression deformation in the thickness direction and expansion deformation in the plane direction through changes in the electric field, thereby driving the special-shaped guide hose 5 to bend inside the narrow knee joint, thereby providing guidance for instruments in the process of meniscus repair of the knee joint, thereby preventing surgical instruments from causing damage to other areas of the patient. The overall structure is light and has a small mass, and the patient will not feel drooping.

[0035] The special-shaped guide hose 5 can be compressed, and a smaller incision is required to place the special-shaped guide hose 5 into the patient's knee joint, with less disturbance to other tissues inside the patient's knee joint.

[0036] Specifically, the guide fixing plate 1 is in a trumpet shape, is integrally injection-molded, and is green in color, which allows doctors to watch it for a long time without causing visual fatigue.

[0037] Specifically, the lower part of the guide fixing plate 1 is connected to the external traction airbag 2. When the external traction airbag is inflated, the upper surface of the external traction airbag abuts against the lower surface of the guide fixing plate, and the lower surface of the external traction airbag abuts against the skin at the patient's knee joint.

[0038] Specifically, the outer peripheral surface of one end of the special-shaped guide hose 5 is connected with a built-in anchor body 4, and the installation position of the built-in anchor body 4 is close to the connection end between the elastic connecting tube 3 and the special-shaped guide hose 5. The built-in anchor body can be expanded by filling with gas or liquid, and the built-in anchor body is not made of flexible material, and the maximum expansion volume is fixed. When the maximum volume of the built-in anchor body is reached, it will not be able to continue to be inflated with gas or liquid, which effectively avoids overfilling of gas or liquid in the built-in anchor body and causes adverse effects on the patient's knee joint.

[0039] The other end of the special-shaped guide hose 5 is connected to a flexible protective head 6, which is semicircular in shape and has an opening at the top of the flexible protective head, so that the instruments required for knee joint repair surgery can reach the surgical area from the special-shaped guide hose. During the guiding process, the flexible protective head has little effect on the tissues in the knee joint and will not cause secondary damage.

[0040] Specifically, an infusion port 7 is provided on the outer wall of the guide fixing plate 1, and an infusion tube 8 is provided inside the guide fixing plate 1, one end of the infusion tube 8 is connected with the infusion port 7, and the other end of the infusion tube 8 is respectively connected with the external traction airbag 2 and the internal anchor body 4, so that medical staff can fill gas and / or liquid into the external traction airbag 2 and the internal anchor body 4 through the infusion port. Generally, during the operation, the internal anchor body 4 is filled first, and low-temperature saline is filled into the internal anchor body 4 to provide analgesia for the patient's wound site, and complement with anesthetics in the early stage of the operation to relieve the patient's discomfort. Then, according to the condition of the patient's skin, it is selected whether to replace the low-temperature saline and choose gas for filling instead;

[0041] After the internal anchoring body is filled, the volume is expanded and it will be stuck inside the wound of the patient's knee joint. Then, gas is filled into the external traction airbag 2. The external traction airbag and the internal anchoring body are in contact with the patient's skin over a large area to achieve the fixation operation, which is convenient for the special-shaped guide hose to guide the operation in the knee joint. At the same time, the hands of medical staff are freed, and they do not have to fix the hands in real time. While improving the patient's comfort during the operation, it also improves the work efficiency of medical staff.

[0042] At the same time, it prevents medical staff from holding the guide device for a long time, which may cause damage to the internal tissue of the patient's knee joint when they are tired and shake it for non-surgical purposes.

[0043] Specifically, the special-shaped guide hose 5 is divided into a telescopic zone 501 and a torsion zone 502. The tube wall at the telescopic zone 501 is spirally coated with a tubular dielectric elastomer 9. The tubular dielectric elastomer 9 can be extended and contracted when subjected to changes in the electric field, thereby meeting the length requirement of the telescopic zone 501 during the guiding process.

[0044] The tube wall at the torsion zone 502 is coated with four wavy dielectric elastomers 10 at equal intervals. By applying an electric field to the four wavy dielectric elastomers 10 respectively, the torsion zone 502 can be bent to meet the direction requirements of the torsion zone 502 during the guiding process.

[0045] The tubular dielectric elastomer 9 and the wavy dielectric elastomer 10 are connected to an external controller via a pipeline in the special-shaped guide hose 5; further, a surgical instrument channel, a wire channel and a catheter channel are provided in the special-shaped guide hose.

[0046] In addition, the programming technology of the external controller is known and can be implemented by operators in this field, and will not be described in detail herein.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A protective guide for knee meniscus repair surgery, comprising an elastic connecting tube (3), characterized in that: The upper end of the elastic connecting tube (3) is connected to the guide fixing plate (1), and the lower end of the elastic connecting tube (3) is connected to the special-shaped guiding hose (5), and the tube wall of the special-shaped guiding hose (5) is coated with a dielectric elastomer.

2. A protective guide for knee meniscus repair surgery according to claim 1, characterized in that: The guide fixing plate (1) is in a bell-mouth shape.

3. The protective guide for knee meniscus repair surgery according to claim 2, characterized in that: The lower part of the guide fixing plate (1) is connected to the external traction airbag (2).

4. The protective guide for knee meniscus repair surgery according to claim 3, characterized in that: The outer peripheral surface of one end of the special-shaped guide hose (5) is connected to a built-in anchor body (4), and the installation position of the built-in anchor body (4) is close to the connection end between the elastic connecting tube (3) and the special-shaped guide hose (5); The other end of the special-shaped guide hose (5) is connected to a flexible protective head (6).

5. A protective guide for knee meniscus repair surgery according to claim 4, characterized in that: A perfusion port (7) is provided on the outer side wall of the guide fixing plate (1), and a perfusion pipe (8) is provided inside the guide fixing plate (1), and one end of the perfusion pipe (8) is connected to the perfusion port (7).

6. The protective guide for knee meniscus repair surgery according to claim 5, characterized in that: The other end of the perfusion tube (8) is respectively connected to the external traction airbag (2) and the internal anchor body (4).

7. The protective guide for knee meniscus repair surgery according to claim 1, characterized in that: The special-shaped guide hose (5) is divided into a telescopic zone (501) and a torsion zone (502), and a tubular dielectric elastomer (9) is spirally coated inside the tube wall at the telescopic zone (501); A plurality of wavy dielectric elastomers (10) are coated at equal intervals in the tube wall at the torsion zone (502); The tubular dielectric elastomer (9) and the wavy dielectric elastomer (10) are connected to an external controller via a pipeline in the special-shaped guide hose (5).

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