Cutter for transverse carpal ligament
By designing a transverse carpal ligament cutter, a hollow transparent tube guides the blade to precisely cut the transverse carpal ligament, solving the problems of low release efficiency and accidental injury risk in minimally invasive surgery, and achieving smaller incisions and higher safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2026-03-20
AI Technical Summary
In current minimally invasive surgeries, the release efficiency of the transverse carpal ligament is low, the space is limited, and there is a risk of accidentally injuring the median nerve. Traditional instruments cannot efficiently complete the arthroscopic cutting of the transverse carpal ligament.
Design a transverse carpal ligament cutter, including a blade and a hollow transparent tube shell. The hollow transparent tube shell guides the blade to precisely cut the transverse carpal ligament. The avoidance part is designed to protect the median nerve. It is used in conjunction with an arthroscopy to provide a clear field of vision and reduce the size of the incision.
This method improves the efficiency of arthroscopic release of the transverse carpal ligament, reduces the probability of accidental injury to the median nerve, and reduces the minimally invasive incision to 3.5-4.0mm, thereby enhancing the accuracy and safety of the surgery.
Smart Images
Figure CN224008442U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical instrument technical field especially, is a wrist transverse ligament cutter. BACKGROUND
[0002] In the modern medical field, carpal tunnel syndrome is a common peripheral nerve compression disease, mainly due to the compression of median nerve by wrist transverse ligament, for the patient who is ineffective in conservative treatment, usually need to carry out surgical treatment to release wrist transverse ligament, relieve the compression of median nerve, carpal tunnel syndrome surgery adopts open operation mode, although can effectively release wrist transverse ligament, but there are the defects such as big surgical trauma, long postoperative recovery time, high risk of incision infection, with the continuous development of minimally invasive surgical technique, wrist transverse ligament release under arthroscopy gradually becomes an important treatment means.
[0003] Due to the special position and structure of wrist transverse ligament, open operation of carpal tunnel syndrome has the risk of long recovery time, postoperative pain and large scar, high infection risk, nerve injury and more bleeding, when developing minimally invasive arthroscopic surgery, usually contains the following four steps, skin incision, palmaris longus release, wrist transverse ligament decomposition and cutting, median nerve release, in the third step-wrist transverse ligament decomposition and cutting, due to the use of arthroscopic operation, space is limited, using the existing surgical equipment tool cannot efficiently release and cut wrist transverse ligament, brings the operation trouble to the operator. UTILITY MODEL CONTENTS
[0004] The utility model aims at providing a wrist transverse ligament cutter to solve the above-mentioned problems existing in the prior art, which can effectively improve the release efficiency of wrist transverse ligament under arthroscopy and the success rate of surgery, and greatly reduce the probability of injuring the median nerve, while reducing the minimally invasive incision by about half.
[0005] To achieve the above object, the utility model provides the following scheme:
[0006] The utility model provides a kind of wrist transverse ligament cutter, including blade and hollow transparent tube shell, the hollow transparent tube shell can accommodate arthroscope, the front end of the hollow transparent tube shell has first avoiding part and second avoiding part, the first avoiding part and the second avoiding part are left-right symmetrical, the top end of the first avoiding part is connected with the top end of the second avoiding part at first connecting place, the bottom end of the first avoiding part is connected with the bottom end of the second avoiding part at second connecting place, the middle part of the first avoiding part and the middle part of the second avoiding part are recessed to the rear end direction of the hollow transparent tube shell, the distance from the second connecting place to the rear end of the hollow transparent tube shell is greater than the distance from the first connecting place to the rear end of the hollow transparent tube shell;The top end of the blade is fixedly arranged in the first connecting place, the bottom end of the blade is fixedly arranged in the inside of the second connecting place, and the cutting edge part of the blade can be exposed outside the hollow transparent tube shell.
[0007] Preferably, a blocking area is left between the outer edge of the first connecting place and the top end of the blade, and a shovel protection area is left between the outer edge of the second connecting place and the bottom end of the blade.
[0008] Preferably, the hollow transparent tube shell is a medical high borosilicate glass tube shell.
[0009] Preferably, the inside wall of the hollow transparent tube shell has a limiting protrusion, the limiting protrusion is arranged between the blade and the rear end of the hollow transparent tube shell, the limiting protrusion can prevent the arthroscope from moving towards the blade, the distance between the limiting protrusion and the rear end of the hollow transparent tube shell is 7.90cm or 11.00cm, the outer diameter of the hollow transparent tube shell is 3.05cm, and the inner diameter is 2.95cm.
[0010] Preferably, the rear end of the hollow transparent tube shell has a first handle and a second handle, and the first handle and the second handle are left-right symmetrical; the length of the first handle and the second handle is 2.5cm.
[0011] Preferably, the hollow transparent tube shell, the first handle and the second handle are integrally formed.
[0012] Preferably, the first avoiding part and the second avoiding part are smoothly connected.
[0013] Preferably, the front end of the hollow transparent tube shell is smooth.
[0014] Preferably, the top end of the blade can be detached from the first connecting place, and the bottom end of the blade can be detached from the inside of the second connecting place.
[0015] Preferably, an upper clamping groove is formed in the inner side of the first connecting portion, a lower clamping groove is formed in the inner side of the second connecting portion, the top end of the blade can be embedded in the upper clamping groove, and the bottom end of the blade can be embedded in the lower clamping groove.
[0016] The wrist transverse ligament cutter provided by the utility model has the following technical effects compared with the prior art:
[0017] The wrist transverse ligament cutter provided by the utility model has the following technical effects compared with the prior art: BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.
[0019] Figure 1 It is a schematic view of the wrist transverse ligament cutter provided by the utility model;
[0020] Figure 2 It is a schematic view of the wrist transverse ligament cutter provided by the utility model; Figure 1The front view;
[0021] Figure 3 for Figure 2 Top view;
[0022] Figure 4 for Figure 2 The right view;
[0023] In the figure: 1-blade, 2-hollow transparent tube shell, 3-first clearance part, 4-second clearance part, 5-first connection, 6-second connection, 7-scooping protection area, 8-first handle, 9-second handle, 10-blocking area, 11-limiting protrusion. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] The purpose of this invention is to provide a transverse wrist ligament cutter to solve the problems existing in the current minimally invasive techniques. By reducing the incision size by about half, it can more effectively improve the release efficiency and success rate of arthroscopic transverse wrist ligament and greatly reduce the probability of accidental injury to the median nerve.
[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0027] like Figures 1-4 As shown, this utility model provides a transverse carpal ligament cutter, including a blade 1 and a hollow transparent tube shell 2. The hollow transparent tube shell 2 can accommodate an arthroscope. The front end of the hollow transparent tube shell 2 has a first clearance portion 3 and a second clearance portion 4. The first clearance portion 3 and the second clearance portion 4 are symmetrical. The top end of the first clearance portion 3 and the top end of the second clearance portion 4 are connected to a first connection point 5. The bottom end of the first clearance portion 3 and the bottom end of the second clearance portion 4 are connected to a second connection point 6. The middle part of the first clearance portion 3 and the middle part of the second clearance portion 4 are both recessed towards the rear end of the hollow transparent tube shell 2. The distance from the second connection point 6 to the rear end of the hollow transparent tube shell 2 is greater than the distance from the first connection point 5 to the rear end of the hollow transparent tube shell 2. The top end of the blade 1 is fixedly disposed at the first connection point 5, and the bottom end of the blade 1 is fixedly disposed inside the second connection point 6. The cutting edge of the blade 1 can be exposed outside the hollow transparent tube shell 2.
[0028] The wrist transverse ligament cutter provided by the utility model, the distance from the second connecting position 6 to the rear end of the hollow transparent tube shell 2 is greater than the distance from the first connecting position 5 to the rear end of the hollow transparent tube shell 2, the top end of the blade 1 is fixedly arranged at the first connecting position 5, the bottom end of the blade 1 is fixedly arranged at the second connecting position 6, that is, the top end of the blade 1 is arranged in an inclined manner towards the rear end of the hollow transparent tube shell 2, in arthroscopic surgery, when the surgery needs to separate and cut the wrist transverse ligament, the arthroscope is inserted into the hollow transparent tube shell 2, then the hollow transparent tube shell 2 with the arthroscope is inserted between the wrist transverse ligament and the median nerve, the second connecting position 6 is closer to the median nerve, the wrist transverse ligament is guided through the front end of the hollow transparent tube shell 2, so that the wrist transverse ligament is effectively separated from the median nerve, the median nerve is always on the side away from the first connecting position 5 of the second connecting position 6, the damage of the blade 1 to the median nerve is avoided, the middle part of the first avoiding part 3 and the middle part of the second avoiding part 4 are recessed towards the rear end of the hollow transparent tube shell 2, the blade edge part of the blade 1 can be exposed outside the hollow transparent tube shell 2, the wrist transverse ligament can be cut, the wrist transverse ligament can be accurately cut, the wrist transverse ligament is completely cut, the perfect combination of accurate cutting and nerve protection is realized; in addition, the hollow transparent tube shell 2 not only provides a clear visual space for the arthroscope, so that the doctor can observe the situation of the tissue in and around the hollow transparent tube shell 2 in real time during the surgery, the accuracy and safety of the surgery are improved, but also the cooperation of the hollow transparent tube shell 2 and the arthroscope makes the surgical operation more convenient, reduces the difficulty and risk of the surgery, secondly, the wrist transverse ligament cutter provided by the utility model can further reduce the arthroscopic incision, the conventional minimally invasive incision is about 1.0 cm, and the wrist transverse ligament cutter provided by the utility model can further reduce the minimally invasive incision to about 3.5-4.0 mm.
[0029] Further, the blocking area 10 is left between the outer edge of the first connecting position 5 and the top end of the blade 1, the blocking area 10 plays a blocking role on the wrist transverse ligament, so that when the wrist transverse ligament is pushed and cut, the wrist transverse ligament cannot be effectively cut by the blade 1 due to floating above the hollow transparent tube shell 2, the shovel protection area 7 is left between the outer edge of the second connecting position 6 and the bottom end of the blade 1, so that the wrist transverse ligament can be shoveled, so that the wrist transverse ligament is more efficiently separated from the median nerve, and the damage of the blade 1 to the median nerve is more effectively avoided.
[0030] As a more preferred embodiment of the embodiment, the hollow transparent tube shell 2 is a medical high borosilicate glass tube shell, has good transparency, can provide a clear visual space for the arthroscope, and has a certain hardness to meet the operation requirements.
[0031] As a more preferred embodiment of the present embodiment, the inner side wall of the hollow transparent tube shell 2 is provided with a limiting protrusion 11, which is arranged between the blade 1 and the rear end of the hollow transparent tube shell 2. The limiting protrusion 11 can prevent the arthroscope from moving towards the blade 1, avoid the arthroscope lens from directly contacting the blade 1 to wear the arthroscope lens, and also prevent the arthroscope lens from directly pushing the blade 1 out to disengage. The distance between the limiting protrusion 11 and the rear end of the hollow transparent tube shell 2 is 7.90 cm or 11.00 cm, the outer diameter of the hollow transparent tube shell is 3.05 cm, and the inner diameter is 2.95 cm, which is suitable for the installation requirements of two commonly used arthroscopes and meets the operation requirements.
[0032] Further, the rear end of the hollow transparent tube shell 2 is provided with a first handle 8 and a second handle 9, which are symmetrically arranged on the left and right sides. The length of the first handle 8 and the second handle 9 is 2.5 cm, which is convenient for holding and pushing forward during operation.
[0033] As a more preferred embodiment of the present embodiment, the hollow transparent tube shell 2 is integrally formed with the first handle 8 and the second handle 9, which is convenient for manufacturing.
[0034] As a more preferred embodiment of the present embodiment, the first avoiding part 3 and the second avoiding part 4 are smoothly connected, which effectively avoids damaging the median nerve.
[0035] As a more preferred embodiment of the present embodiment, the front end of the hollow transparent tube shell 2 is smooth, which effectively avoids damaging the median nerve.
[0036] Further, the top end of the blade 1 can be detached from the first connecting part 5, and the bottom end of the blade 1 can be detached from the inner side of the second connecting part 6, which is convenient for manufacturing and use.
[0037] As a more preferred embodiment of the present embodiment, the first connecting part 5 is provided with an upper clamping groove in the inner side, and the second connecting part 6 is provided with a lower clamping groove in the inner side. The top end of the blade 1 can be fixedly embedded in the upper clamping groove, and the bottom end of the blade 1 can be fixedly embedded in the lower clamping groove, which ensures that the blade 1 is stable during the operation and will not be loose or displaced.
[0038] As a more preferred embodiment of the present embodiment, the top end of the blade 1 is bonded with the first connecting part 5, and the bottom end of the blade 1 is bonded with the second connecting part 6, which effectively prevents the blade 1 from falling off during the operation and avoids damaging the median nerve caused by the falling off of the blade 1.
[0039] As a more preferred embodiment of the present embodiment, the wrist transverse ligament cutter provided by the utility model is designed as a disposable instrument, which is more conducive to post-production and profit.
[0040] The principle and implementation mode of the utility model are described by applying specific examples, and the above embodiment is only used for helping to understand the method and core idea of the utility model; meanwhile, for the general technical personnel in the field, the specific implementation mode and application range will be changed according to the idea of the utility model. In conclusion, the content of the specification should not be understood as the limitation of the utility model.
Claims
1. A transverse carpal ligament cutter, characterized in that: The device includes a blade and a hollow transparent shell. The hollow transparent shell can accommodate an arthroscope. The front end of the hollow transparent shell has a first clearance portion and a second clearance portion, which are symmetrical. The top ends of the first clearance portion and the second clearance portion are connected at a first connection point, and the bottom ends of the first clearance portion and the second clearance portion are connected at a second connection point. The middle portions of both the first and second clearance portions are recessed towards the rear end of the hollow transparent shell. The distance from the second connection point to the rear end of the hollow transparent shell is greater than the distance from the first connection point to the rear end of the hollow transparent shell. The top end of the blade is fixedly disposed at the first connection point, and the bottom end of the blade is fixedly disposed inside the second connection point. The cutting edge of the blade can be exposed outside the hollow transparent shell.
2. The transverse carpal ligament cutter according to claim 1, characterized in that: A blocking area is left between the outer edge of the first connection and the tip of the blade, and a scraping protection area is left between the outer edge of the second connection and the bottom of the blade.
3. The transverse carpal ligament cutter according to claim 1, characterized in that: The hollow transparent tube shell is a medical-grade borosilicate glass tube shell.
4. The transverse carpal ligament cutter according to claim 1, characterized in that: The inner wall of the hollow transparent tube shell has a limiting protrusion, which is located between the blade and the rear end of the hollow transparent tube shell. The limiting protrusion can prevent the arthroscope from moving toward the blade. The distance between the limiting protrusion and the rear end of the hollow transparent tube shell is 7.90cm or 11.00cm. The outer diameter of the hollow transparent tube shell is 3.05cm and the inner diameter is 2.95cm.
5. The transverse carpal ligament cutter according to claim 1, characterized in that: The hollow transparent tube shell has a first handle and a second handle at its rear end, and the first handle and the second handle are symmetrical from left to right; the length of the first handle and the second handle is 2.5cm.
6. The transverse carpal ligament cutter according to claim 5, characterized in that: The hollow transparent tube shell is integrally formed with the first handle and the second handle.
7. The transverse carpal ligament cutter according to claim 1, characterized in that: The first clearance portion and the second clearance portion are smoothly connected.
8. The transverse carpal ligament cutter according to claim 7, characterized in that: The front end of the hollow transparent tube shell is smooth.
9. The transverse carpal ligament cutter according to claim 1, characterized in that: The tip of the blade can be detached from the first connection, and the bottom of the blade can be detached from the inside of the second connection.
10. The transverse carpal ligament cutter according to claim 9, characterized in that: An upper slot is provided on the inner side of the first connection, and a lower slot is provided on the inner side of the second connection. The top end of the blade can be inserted into the upper slot, and the bottom end of the blade can be inserted into the lower slot.