Achilles tendon stitching instrument

Abstract

The invention discloses an achilles tendon stitching instrument, and particularly relates to the technical field of medical instruments, the achilles tendon stitching instrument comprises a high-strength line for stitching and curved needle assemblies connected to the two ends of the high-strength line, each curved needle assembly comprises a hollow needle body, a needle point body and a needle hoop, the high-strength line penetrates through the two hollow needle bodies, and the needle hoop is connected to the needle point body. Wire hoops are fixedly arranged at the ends, away from the needle tip, of the two needle tip bodies, the two ends of the high-strength wire are fixedly connected with the two wire hoops respectively, the needle hoops comprise needle tip inner hoops, and the needle tip inner hoops are fixed to the ends, close to the needle tip bodies, of the hollow needle bodies. The needle point body is limited through the needle point inner hoop and the needle point outer hoop, so that the needle point body can only be pulled outwards from the hollow needle body, reverse retraction is avoided, the design limits the one-way traction direction, compared with a traditional suture mode, the mode is more flexible, suture of the achilles tendon broken end can be completed only through one-in and one-out operation, the technical difficulty can be reduced, and meanwhile the suture efficiency is improved. The method is close to the minimally invasive surgery concept, epidermis incisions are reduced, and the recovery efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical appliances, and more particularly to an Achilles tendon suture device. Background Art

[0002] In recent years, with the increase in the number of people doing outdoor sports and improper sports protection measures, the incidence of Achilles tendon rupture has continued to rise. Achilles tendon rupture is a common disease of the sports system, usually caused by sports injuries or knife wounds. Achilles tendon rupture is common in sports, heavy physical labor and other scenes. Since the Achilles tendon directly affects the plantar flexion and other functions of the foot, it directly affects the patient's walking and labor, so Achilles tendon suture is usually required after the injury. Minimally invasive treatment of Achilles tendon is the current development direction in the field of surgery. Compared with traditional open surgery, minimally invasive surgical treatment of Achilles tendon rupture has the advantages of less trauma, less pain for patients, shorter hospitalization time, and fewer wound complications. Commonly used minimally invasive methods in China include skin puncture minimally invasive surgery, arthroscopic minimally invasive surgery, etc. The micro-Achilles tendon system used in recent years to treat closed Achilles tendon rupture can further shorten the operation time and reduce the possibility of sural nerve damage. A suture device is required for Achilles tendon suture.

[0003] For example, the prior art publication number CN105852923A discloses a minimally invasive Achilles tendon suturing instrument. During minimally invasive Achilles tendon suturing surgery, the surgical incision is located proximal to the Achilles tendon rupture site. A minimally invasive suture instrument is used to introduce the minimally invasive suture thread from the Achilles tendon insertion point into the Achilles tendon sheath tissue and then lead it out through the surgical incision. This invention can avoid damaging the sural nerve while also avoiding making a surgical incision at the Achilles tendon rupture site, which could disrupt local blood flow. Another example is the prior art publication number CN107736904A, which discloses an Achilles tendon suture instrument. The needle guide hole on the instrument is designed to provide two different threading methods, including parallel threading and cross threading, increasing efficiency and facilitating surgery. A handle is also added to pull out or push in the Achilles tendon suture instrument, making it easier to hold. The handle is detachable to accommodate different surgeons' surgical habits.

[0004] Existing Achilles tendon suturing methods include incision and suturing (Krackow lock-edge suturing, etc.), minimally invasive suturing (percutaneous assisted Bunnel suturing), etc. The former usually requires a longer incision before suturing, and the suture management is relatively complicated. The latter requires more complex auxiliary devices, etc., before further treatment, and the learning curve is also longer. Based on this, the present invention provides an Achilles tendon suturing device, which is used to reduce technical difficulty while being as close to the concept of minimally invasive surgery as possible, reducing epidermal incisions, and improving recovery efficiency. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an Achilles tendon suture device, which limits the needle tip body by an inner needle tip hoop and an outer needle tip hoop so that it can only be pulled outward from the hollow needle body to avoid reverse retreat. This design limits the unidirectional pulling direction and is more flexible than the traditional suturing method. Only two operations of "one in and one out" are required to complete the suturing of the Achilles tendon stump. While reducing the technical difficulty, it can also be close to the concept of minimally invasive surgery, reduce epidermal incisions, and improve recovery efficiency to solve the problems arising from the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an Achilles tendon suture device, comprising a high-strength wire for suturing and a curved needle assembly connected to both ends of the high-strength wire, the curved needle assembly comprising a hollow needle body, a needle tip body and a needle hoop, the high-strength wire passes through two hollow needle bodies, and both needle tips are fixed with a wire hoop at one end away from the needle tip, the two ends of the high-strength wire are respectively fixedly connected to the two wire hoops, the needle hoop comprises a needle tip inner hoop, the needle tip inner hoop is fixed to one end of the hollow needle body close to the needle tip body, a needle tip outer hoop is fixed on the needle tip inner hoop, and the needle tip outer hoop is clamped with the needle tip body.

[0007] In a preferred embodiment, both needle tip bodies are fixed with a wire hoop at one end away from the needle tip, and the two ends of the high-strength wire are fixedly connected to the two wire hoops respectively. The wire hoop can tightly fix the high-strength wire to the tail of the needle tip body through a physical locking structure, avoiding loosening or slipping caused by tension changes in traditional knotting methods, and is particularly suitable for scenarios withstanding repeated pulling.

[0008] In a preferred embodiment, the outer wall of the needle tip body is integrally formed with an annular protrusion, and two annular grooves distributed upper and lower are formed between the annular protrusion and the outer wall of the needle tip body. The needle tip inner hoop and the needle tip outer hoop are respectively clamped in the two annular grooves, which can prevent the needle tip body from automatically moving out of the hollow needle body and prevent the needle tip body from being pulled into the hollow needle body.

[0009] In a preferred embodiment, the cross section of the annular protrusion is set to be conical, and the needle tip inner hoop is in contact with the outer wall of the annular protrusion, which can improve the limiting effect of the needle tip inner hoop on the needle tip body.

[0010] In a preferred embodiment, a needle tip annular groove is provided on the surface of the two needle tips away from the annular protrusion, which makes it easier for doctors to use a needle holder to pull out the needle tips, saving time and effort.

[0011] In a preferred embodiment, the hollow needle body retracts toward one end of the needle tip to prevent the needle tip from retracting. The cross-section of the hollow needle body is set to be semicircular. Compared with the circular cross-section, the contact area with the tissue during puncture is more concentrated on the edge of the arc, which can reduce the tissue resistance during puncture and make the curved needle assembly easier to pass through dense tissues such as the Achilles tendon, and is particularly suitable for precise puncture when the Achilles tendon is ruptured.

[0012] The technical effects and advantages of the present invention are as follows:

[0013] 1. The present invention limits the position of the needle tip by the inner and outer needle tip hoops, so that the needle tip can be pulled out from the hollow needle body, but cannot be pulled back into the hollow needle body, which limits the pulling direction. Compared with the traditional suturing method, the method of use is diverse and can be selected according to the situation. It only requires one in and one out, one time on each side, and a total of times to complete the suturing of the upper / lower ends of the Achilles tendon. While reducing the technical difficulty, it can also be close to the concept of minimally invasive surgery, reduce epidermal incisions, and improve recovery efficiency.

[0014] 2. By providing an annular protrusion on the needle tip body to cooperate with the needle tip outer hoop, the needle tip outer hoop can effectively restrict the needle tip body, effectively preventing the needle tip body from moving out of the hollow needle body, and providing a needle tip ring groove on the needle tip body to facilitate the doctor to pull the needle tip body to move with the help of tools, which is more time-saving and labor-saving to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 Schematic diagram of the hollow needle body and needle tip of the present invention;

[0017] Figure 3 A cross-sectional view of the hollow needle body, needle ferrule and needle tip of the present invention;

[0018] Figure 4 is a cross-sectional view of the needle tip and wire hoop of the present invention;

[0019] Figure 5 is a cross-sectional view of the hollow needle body of the present invention;

[0020] Figure 6 Schematic diagram of the suture structure of Scheme 1;

[0021] Figure 7 This is a schematic diagram of the suture structure of scheme 2;

[0022] Figure 8 Schematic diagram of the suture structure of scheme three.

[0023] The accompanying drawings are marked as follows: 1. high-strength wire; 2. curved needle assembly; 3. needle tip ring groove;

[0024] 21. Hollow needle body; 22. Needle tip; 23. Needle ferrule; 24. Thread ferrule;

[0025] 221, annular protrusion; 222, annular groove;

[0026] 231. Inner hoop of needle tip; 232. Outer hoop of needle tip. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Refer to the instruction manual Figures 1-8 The present invention provides an Achilles tendon suture device, comprising a high-strength wire 1 for suturing and a curved needle assembly 2 connected to both ends of the high-strength wire 1, the curved needle assembly 2 comprising a hollow needle body 21, a needle tip 22 and a needle hoop 23, the high-strength wire 1 passes through the two hollow needle bodies 21, the hollow needle body 21 shrinks toward one end of the needle tip 22 to prevent the needle tip 22 from retracting, the cross-section of the hollow needle body 21 is set to be semicircular, compared with the circular cross-section, the contact area with the tissue during puncture is more concentrated on the arc edge, which can reduce the tissue resistance during puncture, making it easier for the curved needle assembly 2 to pass through dense tissues such as the Achilles tendon, and is particularly suitable for precise puncture when the Achilles tendon is ruptured.

[0029] The two needle tip bodies 22 are fixed with a wire hoop 24 at one end away from the needle tip. The two ends of the high-strength wire 1 are fixedly connected to the two wire hoops 24 respectively. The wire hoop 24 tightly fixes the high-strength wire to the tail of the needle tip through a physical locking structure (such as an annular hoop, a snap design), avoiding loosening or slipping caused by tension changes in traditional knotting methods, and is suitable for Achilles tendon suture. The needle hoop 23 includes a needle tip inner hoop 231, and the needle tip inner hoop 231 is fixed to one end of the hollow needle body 21 close to the needle tip body 22. A needle tip outer hoop 232 is fixed on the needle tip inner hoop 231, and the needle tip outer hoop 232 is snapped into the needle tip body 22.

[0030] An annular protrusion 221 is integrally formed on the outer wall of the needle tip body 22, and an annular groove 222 is formed between the annular protrusion 221 and the needle tip body 22. The needle tip outer hoop 232 is sleeved on the outside of the needle tip body 22 and is engaged with the annular groove 222. The cross-section of the annular protrusion 221 is set to be conical, and the needle tip inner hoop 231 is in contact with the outer wall of the annular protrusion 221. A needle tip annular groove 3 is provided on the surface of the two needle tips 22 away from the annular protrusion 221 to facilitate the needle holder to pull out the needle tip body 22.

[0031] During actual operation, the position of the needle tip 22 is limited by the needle clamp 23, so that the doctor can pull the needle tip 22 from the hollow needle body 21 to the outside, but cannot pull the needle tip 22 into the hollow needle body 21 from the tail of the hollow needle body 21, thereby limiting the pulling direction. In this way, if the doctor does not want to use the curved needle assembly 2 as a force-bearing point and only wants to use the high-strength wire 1, the entire curved needle can be taken out along the insertion direction. Compared with the traditional method, although the improvement is smaller, the operation is simpler and the surgical difficulty is low.

[0032] If the doctor wants to use the curved needle assembly 2 as a force-bearing point, the needle tip 22 is pulled outward. During the specific operation, the doctor can use the needle holder to clamp it inside the needle tip ring groove 3, and then apply a large force to pull the needle tip 22 out from the needle tip outer hoop 232. At the same time, the high-strength wire 1 is driven to continue to be pulled out from the inside of the hollow needle body 21 and tightened, which is convenient for knotting and simple to operate, and can reduce the technical difficulty of Achilles tendon suture.

[0033] The specific usage plans are Plan 1, Plan 2 and Plan 3.

[0034] Option 1: It can be used purely as a suture needle;

[0035] That is, it is used as a suture needle to directly penetrate as the main line / decompression line, etc. After the two curved needle components 2 pass through the upper / lower ends, the high-strength line 1 is driven to pass through the upper / lower ends of the Achilles tendon, and then the excess high-strength line 1 is cut off. After removing the hollow needle body 21 and the needle tip body 22, the high-strength line 1 can be directly knotted, and the high-strength line 1 is used to complete the suturing of the upper / lower ends of the Achilles tendon. Figure 6 shown.

[0036] Option 2: Double needle semicircle penetrating Achilles tendon method;

[0037] Compared with the first solution, the second solution mainly uses the curved needle assembly 2 as an object retained in the body. Specifically, the two hollow needle bodies 21 are respectively retained in the upper / lower ends of the Achilles tendon and used as sutures. Then the doctor only needs to pull out the needle tips 22 inside the two hollow needle bodies 21, and then tighten the high-strength line 1 between the two needle tips 22 to tie a knot, and then cut off the needle tips 22 and the excess high-strength line 1 to complete the suturing of the upper / lower ends of the Achilles tendon. Figure 7 shown.

[0038] Option 3: Double needle 1 / 4 circle penetration and inward rotation method;

[0039] Compared with the second scheme, the curved needle assembly 2 in the second scheme remains inside the Achilles tendon, and part of one of the hollow needle bodies 21 does not extend from the Achilles tendon sheath, which can make more contact with the inside of the Achilles tendon, so it can hook more Achilles tendons, which is suitable for Achilles tendons with broken ends. The other hollow needle body 21 extends from the Achilles tendon sheath. Then, the doctor needs to use a needle holder to pull out the needle tips 22 in the two hollow needle bodies 21 respectively, tighten the high-strength wire 1 and tie a knot, and finally cut off the excess high-strength wire 1 and the needle tip 22. Figure 8 shown.

[0040] Compared with traditional suturing methods, the above three solutions only require one in and one out, one time on each side, a total of two times, to complete the suturing of the upper / lower ends of the Achilles tendon. While reducing technical difficulty, it can also be close to the concept of minimally invasive surgery, reduce epidermal incisions, and improve recovery efficiency.

[0041] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An Achilles tendon suture device, characterized in that: The invention comprises a high-strength thread (1) for suturing and a curved needle assembly (2) connected to both ends of the high-strength thread (1), wherein the curved needle assembly (2) comprises a hollow needle body (21), a needle tip body (22) and a needle hoop (23), and the high-strength thread (1) passes through the two hollow needle bodies (21); The needle hoop (23) comprises a needle tip inner hoop (231), which is fixed to one end of the hollow needle body (21) close to the needle tip body (22); a needle tip outer hoop (232) is fixedly provided on the needle tip inner hoop (231), and the needle tip outer hoop (232) is clamped with the needle tip body (22).

2. The Achilles tendon suture device according to claim 1, characterized in that: A wire hoop (24) is fixedly provided at one end of the two needle tip bodies (22) away from the needle tip, and both ends of the high-strength wire (1) are fixedly connected to the two wire hoop (24) respectively.

3. The Achilles tendon suture device according to claim 1, characterized in that: The outer wall of the needle tip body (22) is integrally formed with an annular protrusion (221), and two annular clamping grooves (222) distributed vertically are formed between the annular protrusion (221) and the outer wall of the needle tip body (22), and the needle tip inner hoop (231) and the needle tip outer hoop (232) are respectively clamped in the two annular clamping grooves (222).

4. The Achilles tendon suture device according to claim 3, characterized in that: The cross section of the annular protrusion (221) is configured to be conical, and the needle tip inner hoop (231) contacts the outer wall of the annular protrusion (221).

5. The Achilles tendon suture device according to claim 3, characterized in that: A needle tip annular groove (3) is provided on the surface of the two needle tip bodies (22) on the side away from the annular protrusion (221), so as to facilitate the removal of the needle tip bodies (22) by the needle holder.

6. The Achilles tendon suture device according to claim 1, characterized in that: The hollow needle body (21) contracts toward one end of the needle tip body (22) to prevent the needle tip body (22) from retracting, and the cross section of the hollow needle body (21) is configured to be semicircular.

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