CN213963561U - Hook knife for minimally invasive incision of transverse carpal ligament - Google Patents

Abstract

The utility model discloses a minimal access opens bush-hook of transverse carpal ligament, it includes the blade, the one end of blade is extended there is the handle of a knife, the other end top of blade has the tool bit, the handle of a knife is connected with the blade and is the obtuse angle, the tool bit has and is inside sunken arc sword blade, the opening of sword blade is towards the one end of handle of a knife, the knife tip is located one side that the blade was kept away from to the sword blade, the outside of tool bit is the back of a knife blade for being arcuation design, the position of knife tip is less than the peak position of the back of a knife blade, the back of a knife blade is equipped with the wing structure of separation, the handle of a knife is equipped with anti-skidding groove. The utility model relates to an exquisiteness accords with art person's operation custom, inserts the tool bit along the little incision passageway of wrist cross striation, and the blade is deepened along wrist cross ligament below, and the art person utilizes the obtuse angle design to improve the operational reliability of bush-hook distal end department in the time of through the tractive handle of a knife, makes the bush-hook distal end keep upwarping in the tractive, and the bush-hook tightly hooks wrist cross ligament to utilize the sword edge vertically to open wrist cross ligament along the application of force direction, this bush-hook bodily form is less, accords with the minimal access operation theory.

Description

Hook knife for minimally invasive incision of transverse carpal ligament

Technical Field

The utility model relates to the technical field of medical equipment, more specifically relates to a minimal access opens bush-hook of transverse carpal ligament.

Background

Carpal tunnel syndrome is the most common one of peripheral nerve entrapment syndromes, and is a series of symptoms and signs caused by entrapment of the median nerve in the wrist. Pain and sensory numbness are generated in the thumb, the index finger and the middle finger due to the compression of the median nerve of the wrist, sensory dysfunction at the tip of the finger is usually presented in the early stage, the finger is usually wakened due to numbness or burning pain for hours after falling asleep and is relieved after moving, neurotrophism appears in a few patients due to long course of disease, internaloid muscle atrophy, interstitial skin whitening and cyanosis occur, cyanosis occurs in the thumb and the index finger of severe patients, and the current treatment mode is mainly conservative treatment and operation treatment. The invalid patient of conservative treatment often needs the operation treatment, and the operation is mostly open operation in order to open the transverse ligament of wrist in order to decompress at present, reduces the ligament and just to the oppression of neutral nerve, though decompression release is comparatively thorough, but the wound is big, and postoperative rehabilitation time is longer.

Chinese patent No. CN204016430U discloses a carpal tunnel incision decompression knife, which comprises a separation plate inserted into an incision of a cut wrist and separated between a transverse carpal ligament and a median nerve, wherein the separation plate is provided with a guide mechanism, and a knife which is matched with the guide mechanism to move directionally so as to cut the transverse carpal ligament. In the course of performing an operation using the carpal tunnel incision decompression knife, the isolation plate needs to be inserted between the transverse carpal ligament and the median nerve of the wrist, and the movement of the knife is controlled by the guide mechanism to cut off the transverse carpal ligament for decompression. The carpal tunnel incision decompression knife has a large incision, and risks of pressing skin in an incision area and damaging median nerves when the carpal tunnel incision decompression knife is inserted into a large-size isolation plate. Still others have replaced the spacer with a similar cannula, which again requires the insertion of the cannula followed by the insertion of the scalpel along the cannula. Although the combination design of similar sleeve pipe, division board has its novel one side, but the actual operation equipment is comparatively loaded down with trivial details, and normal use is often inconvenient in less incision, also is not favorable to the convenient operation of art person.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a small, the wicresoft inserts the reliable wicresoft of operation and opens the bush-hook of transverse carpal ligament, utilizes this wicresoft to open the bush-hook of transverse carpal ligament to carry out the carpal tunnel decompression, and it is little to have the wound, uses reliably, operates advantages such as handy.

According to the utility model discloses an aspect provides a bush-hook of wicresoft incision transverse carpal ligament, it includes the blade, the one end of blade is extended there is the handle of a knife, the handle of a knife is the obtuse angle design with the contained angle of blade, the other end top of blade is equipped with the tool bit, the tool bit is equipped with and is inside sunken arc sword blade, the opening of sword blade is towards the one end of handle of a knife, one side that the blade was kept away from to the sword blade is equipped with the knife tip, the outside back of a knife blade for being arcuation design of tool bit, the position of knife tip is less than the peak position of the back of a knife blade. Therefore, during operation, a small wrist incision is transversely cut at the wrist cross striation position of a patient, a cutter head is inserted into the wrist incision, the cutter body is deep along the lower part of the transverse carpal ligament, the arc design of the cutter back is matched with the obtuse-angle cutter handle to be flexibly used during insertion, the ligament and the nerve can be effectively protected, the focus can be smoothly reached, the incision operation is carried out, the cutter body below the cutter edge is similar to a partition plate, the lower median nerve and the ligament can be protected during the insertion of the cutter head, and the damage to soft tissues around a channel is reduced; the operator pulls the knife handle and simultaneously utilizes the obtuse angle design to improve the operation reliability at the far end of the hook knife, so that the far end of the hook knife keeps upwarping while pulling, the hook knife tightly hooks the transverse carpal ligament, and the knife edge is utilized to longitudinally cut the transverse carpal ligament along the force application direction; the cleaver is small in size, makes full use of the minimally invasive operation concept, is reasonable in design and facilitates operation of an operator.

In some embodiments, the bottom surface from the front end of the cutting head to the front end of the blade body is curved. From this, adopt the arc design, the tool bit of being convenient for and blade stretch into the wrist smoothly, simultaneously, also reduce the in-process that the front end of tool bit and blade is stretching into, to the damage of human tissue.

In some embodiments, the gradually widening width from the tip to the front tip of the tool tip constitutes a discrete wing structure. Therefore, the separated wing-shaped design is ingeniously combined with the obtuse angle, so that an operator can flexibly operate to pull out tissues below the transverse carpal ligament smoothly, and the blade body below the separated wing-shaped structure is flat and can protect the nerve and tendon tissues below the separated wing-shaped structure when being inserted.

In some embodiments, anti-slip grooves are formed in two side faces of one end, close to the knife body, of the knife handle. Therefore, in the operation, the doctor holds the anti-skidding groove of the knife handle by hand, and the holding force of the surgeon on the knife handle is enhanced.

In some embodiments, the tail end of the knife handle is arc-shaped, and grooves are arranged on two sides of the joint of the knife handle and the knife body. From this, the end of handle of a knife is circular-arc, improves the comfort level when the doctor holds the handle of a knife, and the recess is located the corner of handle of a knife and blade, is convenient for doctorse and nurses the observation position.

In some embodiments, the tool shank, the tool body, and the tool tip are of a unitary construction. Therefore, the design is ingenious, the use is simple, and the operation efficiency is improved.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model has the advantages of exquisite design, small cleaver body, full utilization of minimally invasive operation idea, convenient operation for operators, transversely cutting a small wrist incision at the wrist cross striation position of a patient, inserting a tool bit into the wrist incision, deepening the blade body along the lower part of the wrist cross ligament, skillfully combining the separation wing-shaped design with the obtuse angle, enabling the operators to flexibly operate to smoothly pull out the tissue below the wrist cross ligament and smoothly reach the focus, enabling the blade body below the separation wing-shaped structure to be flat and to be similar to a separation plate, protecting the right middle nerve and ligament below when being inserted, reducing the damage to the soft tissue around the channel, pulling the handle of the scalpel, keeping the far end of the cleaver upwarping when pulling, hooking the cleaver wrist ligament by the cleaver, longitudinally cutting the wrist cross ligament by the blade along the force application direction, and reducing the carpal canal by the cleaver for minimally invasive incision of the wrist cross ligament, has the advantages of small wound, reliable use and smooth operation.

Drawings

FIG. 1 is a schematic view of a hook for minimally invasive cleavage of transverse carpal ligament according to the present invention;

FIG. 2 is a side view of FIG. 1;

figure 3 is a schematic anatomical diagram of human hand tissue showing the structure of the transverse carpal ligament and the median nerve.

Detailed Description

The present invention will be further described with reference to the following embodiments.

It should be noted that in the following detailed description, the term "proximal" refers to an end closer to the heart of a patient, and the term "distal" refers to an end further from the heart of a patient.

As shown in figures 1 and 2, a minimal access surgery cuts bush-hook of transverse carpal ligament of an embodiment, it includes blade 1, and the near-end of blade 1 extends there is handle of a knife 2, and the distal end top of blade 1 has tool bit 3, and handle of a knife 2, blade 1 and tool bit 3 adopt the integral type structure, and handle of a knife 2 is the obtuse angle design with the contained angle of blade 1 junction. The tool bit 3 has an arc-shaped cutting edge 31 which is recessed inwards, and the opening of the cutting edge 31 faces one end of the tool holder 2. The knife point 30 is positioned at one side of the knife edge 31 far away from the knife body 1, the outer part of the knife head 3 is a knife back 32 in an arc shape, and the position of the knife point 30 is lower than the highest point 321 of the knife back 32.

The arc design of back of a knife 32 to and the front end of tool bit 3 is personally submitted the arc to the front end bottom of blade 1, and cooperation obtuse angle handle of a knife 2 is nimble to be used when inserting, can effectively protect ligament, nerve, and the focus is reachd smoothly to tool bit 3 and blade 1 of being convenient for. The width from the cutting tip 30 to the front tip of the cutting head 3 gradually becomes wider to form a separating wing-like structure 322. As shown in fig. 3, after the knife tip 30 hooks the transverse carpal ligament 101, in the process of pulling back, the separated wing-shaped structure 322 is skillfully combined with the knife handle 2 connected with the obtuse angle structure, so that the operation can be flexibly performed by an operator to smoothly pull out the tissue below the transverse carpal ligament 101, and the knife body below the separated wing-shaped structure 322 is flat in design and can protect the nerve and tendon tissue below the separated wing-shaped structure when inserted.

The tail end of the knife handle 2 is arc-shaped 23, grooves 22 are formed in two sides of the joint of the knife handle 2 and the knife body 1, and anti-skidding grooves 21 are formed in two side faces of one end, close to the knife body 1, of the knife handle 2. In the operation, the antiskid groove 21 department of 2 handles of a knife of doctor, reinforcing art person is to the power of controlling of handle of a knife 2 of bush-hook, and the end of handle of a knife 2 is circular-arc 23, improves the comfort level when the doctor holds handle of a knife 2, and recess 22 is located handle of a knife 2 and the corner of blade 1, is convenient for nurse the observation position.

As shown in fig. 3, during the operation, a small wrist incision 100 is transversely cut at the cross-wrist veins of the patient, the knife head 3 is inserted into the wrist incision 100, the knife body 1 is inserted deeply along the position between the cross-carpal ligament 101 and the median nerve 102, and then the operator pulls the knife handle 2 back, the distal end of the hook knife is kept tilted while pulling, the knife tip 30 of the hook knife tightly hooks the cross-carpal ligament 101, and the knife edge 31 is used for longitudinally cutting the cross-carpal ligament 101 along the force application direction.

The hook knife for minimally invasive incision of the transverse carpal ligament is exquisite in design, small in size, capable of fully utilizing the minimally invasive operation concept and convenient for operators to operate. The arc design of the knife back 32, the cooperation separates wing-like design 322 and combines ingeniously with the obtuse angle, can make the operation person operate in a flexible way to poke open transverse carpal ligament 101 below tissue smoothly, reach the focus smoothly, separate blade 1 of wing-like structure 322 below and be flat design, just similar an division board, can protect below just well nerve 102, transverse carpal ligament 101 when inserting, reduce the damage to the soft tissue around the passageway. The utility model has the advantages of small wound, reliable use and smooth operation.

The foregoing is only a few embodiments of the present invention, and it should be noted that, for those skilled in the art, other modifications and improvements can be made without departing from the inventive concept of the present invention, and all of them belong to the protection scope of the present invention.

Claims (6)

1. The utility model provides a wicresoft opens bush-hook of transverse carpal ligament, a serial communication port, including blade (1), the one end of blade extends there is handle of a knife (2), handle of a knife (2) are the obtuse angle design with the contained angle of blade (1), the other end top of blade (1) is equipped with tool bit (3), tool bit (3) are equipped with and are inside sunken arc sword blade (31), the opening of sword blade (31) is towards the one end of handle of a knife (2), one side that blade (1) was kept away from in sword blade (31) is equipped with knife tip (30), outside back of a knife blade (32) for being the arcuation design, the position of knife tip (30) is less than peak (321) position of back of a knife blade (32).

2. The bush-hook for minimally invasive incision of the transverse carpal ligament as in claim 1, wherein the bottom surface from the front end of the cutter head (3) to the front end of the cutter body (1) is arc-shaped.

3. The hook knife for minimally invasive incision of the transverse carpal ligament as in claim 2, wherein the blade tip (30) has a gradually increasing width from the front tip end of the blade head (3) to form a separate wing-shaped structure (322).

4. The bush hook for minimally invasive incision of the transverse carpal ligament according to any one of claims 1 to 3, wherein anti-slip grooves (21) are formed in two side surfaces of one end, close to the knife body (1), of the knife handle (2).

5. The bush-hook for minimally invasive incision of the transverse carpal ligament as in claim 4, wherein the tail end of the handle (2) is arc-shaped, and grooves (22) are arranged on two sides of the joint of the handle (2) and the blade body (1).

6. The bush-hook for minimally invasive incision of the transverse carpal ligament as in claim 1, wherein the knife handle (2), the knife body (1) and the knife head (3) are of an integrated structure.

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