CN216257314U

CN216257314U - Transverse carpal ligament push broach for minimally invasive carpal tunnel syndrome

Info

Publication number: CN216257314U
Application number: CN202122186514.9U
Authority: CN
Inventors: 王祺; 任龙韬
Original assignee: TAIYUAN CITY CENTRE HOSPITAL
Current assignee: TAIYUAN CITY CENTRE HOSPITAL
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2022-04-12
Anticipated expiration: 2031-09-10

Abstract

The utility model provides a transverse carpal ligament push-type broach for minimal access surgery of carpal tunnel syndrome, belongs to medical instrument technical field, uses flat head operation scissors or ordinary operation scissors to damage peripheral nerve or the technical problem of tissue easily when solving the minimal access surgery of carpal tunnel syndrome and cutting open transverse carpal ligament, and the solution is: one end fixed mounting of cutter arbor is on the handle, and the other end of cutter arbor sets up the tool bit, wherein: the side surfaces of the front side and the rear side of the tool bit are both arranged to be wedge-shaped inclined surfaces, the end surface of the free end of the tool bit is arranged to be a flat blunt surface, the middle of the tool bit is provided with an opening to the inner side, the rear side of the opening is provided with a cutting edge, the opening of the opening and the opening of the cutting edge are both acute angles, the angle of the opening of the cutting edge is larger than that of the opening, and the bottom of the cutting edge is in transitional connection with the wedge-shaped inclined surfaces through a conical surface. The utility model has simple structure and convenient use, can avoid damaging surrounding tissues when incising the transverse carpal ligament, has obvious falling feeling when completely incising the transverse carpal ligament, and can avoid side injury.

Description

Transverse carpal ligament push broach for minimally invasive carpal tunnel syndrome

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to a transverse carpal ligament push broach for minimally invasive carpal tunnel syndrome.

Background

Carpal tunnel syndrome (carpal tunnel syndrome) is the most common peripheral nerve entrapment syndrome, well developed in middle-aged people, and is a series of symptoms and signs caused by entrapment of the median nerve in the wrist. Paget first described the disease in 1853.

The clinical manifestations of carpal tunnel syndrome are mainly numbness, stabbing pain or burning pain of the index finger, middle finger and ring finger with pressurized median nerve, aggravated at night after day work, even pain and wakening in sleep; localized pain often radiates to the elbow and shoulder; poor abductive muscle of the thumb, which is occasionally accompanied by an object, suddenly loses its hand when carrying the object. Clinically, atrophy of the muscles of the thenar of the thumb can be caused by long-term pathological changes of a part of patients; even intermittent skin whitening and cyanosis can occur; patients with severe disease may develop cyanosis of the thumb and forefinger, necrosis of the fingertips or atrophic ulcers, which become irreversible changes.

Clinically, the patient with serious symptoms and ineffective conservative treatment for 2 months should be treated by early operation. Carpal tunnel decompression is commonly performed by transepithelial carpal ligament dissection. The surgical incision is generally an arc incision protruding from the radial edge of the hypothenar to the ulnar side and extending to the wrist, so that the damage to the palmar branch of the median nerve can be avoided. The long metacarpal tendon and the flexor carpi radialis tendon are respectively retracted towards two sides to expose the median nerve and the transverse carpal ligament, and the transverse carpal ligament is cut along the ulnar side of the median nerve from the near to the far so as to avoid damaging the return branch of the median nerve, because about 23 percent of the human median nerve returns to the branch and passes through the transverse carpal ligament to the thenar muscle. After the transverse carpal ligament is incised, the condition in the carpal tunnel is explored, if the median nerve is adhered to the peripheral tendon bursa, the median nerve is loosened carefully, and if a new organism exists in the carpal tunnel, the surgery is removed. The transverse carpal ligament does not need to be reconstructed after being cut, and the wound is sutured after the hemostasis is thorough. The plaster of the short arm after operation is fixed at the wrist stretching position for 7-9 days to prevent the flexor tendon from herniating, and then the plaster is removed to start active activities.

At present, when a transverse carpal ligament is cut through a minimally invasive carpal tunnel syndrome operation, a flat-head operation scissors or a common operation scissors are used, and the opening width of the scissors is not easy to control and is very sharp, so that the median nerve, the superficial arch artery and vein of the palm, the tendon of the extensor finger and the like are easy to damage.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and solve the technical problem that peripheral nerves or tissues are easily damaged by using flat-head surgical scissors or common surgical scissors during the minimally invasive surgery for carpal tunnel syndrome.

In order to solve the problems, the technical scheme of the utility model is as follows:

the utility model provides a transverse carpal ligament push-type broach for minimal access surgery of carpal tunnel syndrome, it includes tool bit, cutter arbor and handle, the one end fixed mounting of cutter arbor is on the handle, and the other end of cutter arbor sets up the tool bit, wherein: the utility model discloses a cutter head, including the tool bit, the front and back both sides side of tool bit all sets up to wedge inclined plane, and the free end terminal surface of tool bit sets up to glossy blunt face, and the middle part of tool bit is to the inboard opening that sets up, and the rear side of opening sets up the blade, and the opening of opening and the opening of blade of opening all are the acute angle to blade open-ended angle is greater than opening's angle of opening, and the bottom of blade is through conical surface and wedge inclined plane transitional coupling.

Further, the width of the cutter head is 4mm, and the diameter of the cutter rod is 4 mm.

Furthermore, the material of cutter arbor and tool bit is stainless steel.

Further, the cutter arbor and tool bit integrated into one piece.

Furthermore, the opening angle of the notch is 2-5 degrees, and the depth of the notch is 2-3 mm; the opening angle of the cutting edge is 10-15 degrees, and the depth of the cutting edge is 1-1.5 mm; the inclination of the conical surface is 1-3 degrees.

Furthermore, the front side surface and the rear side surface of the handle are both provided with planes, and the width direction of the front side surface and the width direction of the rear side surface of the handle are parallel to the width direction of the corresponding wedge-shaped inclined surface.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model has simple structure and convenient use, can avoid damaging peripheral tissues such as median nerve, palm superficial arch artery and vein, extensor tendon and the like when incising the transverse carpal ligament, has obvious falling feeling when completely incising the transverse carpal ligament, and can avoid side injury.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is an enlarged view of a portion of the cutter head;

fig. 3 is a partially enlarged top view of the cutter head.

In the figure, 1 is a cutter head, 11 is a wedge-shaped inclined plane, 12 is a flat and blunt plane, 13 is a gap, 14 is a cutting edge, 2 is a cutter bar, and 3 is a handle.

Detailed Description

The utility model is described in further detail below with reference to the figures and examples.

As shown in fig. 1 to 3, a transverse carpal ligament push broach for minimally invasive carpal tunnel syndrome comprises a blade bit 1, a blade bar 2 and a handle 3, wherein one end of the blade bar 2 is fixedly installed on the handle 3, and the other end of the blade bar 2 is provided with the blade bit 1, wherein: the utility model discloses a cutting tool, including tool bit 1, cutting edge 14, the front and back both sides side of tool bit 1 all sets up to wedge inclined plane 11, and the free end terminal surface of tool bit 1 sets up to glossy blunt face 12, and the middle part of tool bit 1 is to the inboard notch 13 that sets up, and the rear side of notch 13 sets up blade 14, and the opening of notch 13 and the opening of blade 14 all are the acute angle to the angle of blade 14 opening is greater than the angle of notch 13 opening, and the bottom of blade 14 is through conical surface and 11 transitional coupling of wedge inclined plane.

Furthermore, the opening angle of the notch 13 is 2-5 degrees, and the depth of the notch is 2-3 mm; the opening angle of the cutting edge is 10-15 degrees, and the depth of the cutting edge is 1-1.5 mm; the inclination of the conical surface is 1-3 degrees.

Further, the width of tool bit 1 is 4mm, and the diameter of cutter arbor 2 is 4mm, and the material of cutter arbor 2 and tool bit 1 is the stainless steel, cutter arbor 2 and tool bit 1 integrated into one piece.

Further, the front side and the rear side of the handle 3 are both set to be a plane, and the width direction of the front side and the rear side of the handle 3 is parallel to the width direction of the corresponding wedge-shaped inclined surface 11. The direction of the wedge-shaped inclined plane 11 is consistent with the direction of the plane of the handle 3 in the operation, and the direction of the cutting edge 14 of the push broach is grasped by the handle 3.

In the process of the practical use of the utility model,

the minimally invasive incision of the transverse carpal veins is about 1.5cm, skin and subcutaneous tissues are incised layer by layer, the transverse carpal ligaments are stripped up and down to expose the transverse carpal ligaments, and the push broach for the transverse carpal ligaments provided by the utility model is used for longitudinally incising to relieve the compression on the middle nerves. The push broach head is a smooth blunt head, and the middle fork is sharp so as to cut off the transverse carpal ligament; the width direction of the handle is consistent with the direction of the cutter head, which is beneficial to controlling the strength and the direction when cutting the ligament.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The utility model provides a transverse carpal ligament push-type broach for minimal access surgery of carpal tunnel syndrome, it includes tool bit (1), cutter arbor (2) and handle (3), the one end fixed mounting of cutter arbor (2) is on handle (3), and the other end of cutter arbor (2) sets up tool bit (1), its characterized in that: the utility model discloses a cutting tool, including tool bit (1), both sides side all sets up to wedge inclined plane (11) around tool bit (1), the free end terminal surface of tool bit (1) sets up to glossy blunt face (12), the middle part of tool bit (1) sets up opening (13) to the inboard, the rear side of opening (13) sets up blade (14), the opening of opening (13) and the opening of blade (14) all are the acute angle, and blade (14) open-ended angle is greater than opening (13) open-ended angle, the bottom of blade (14) is through conical surface and wedge inclined plane (11) transitional coupling.

2. The transverse carpal ligament push broach for minimally invasive surgery of carpal tunnel syndrome as claimed in claim 1, wherein: the width of the cutter head (1) is 4mm, and the diameter of the cutter bar (2) is 4 mm.

3. The transverse carpal ligament push broach for minimally invasive surgery of carpal tunnel syndrome as claimed in claim 1, wherein: the cutter bar (2) and the cutter head (1) are made of stainless steel.

4. The transverse carpal ligament push broach for minimally invasive surgery of carpal tunnel syndrome according to any one of claims 1 to 3, wherein: the cutter bar (2) and the cutter head (1) are integrally formed.

5. The transverse carpal ligament push broach for minimally invasive surgery of carpal tunnel syndrome as claimed in claim 1, wherein: the opening angle of the notch (13) is 2-5 degrees, and the depth of the notch (13) is 2-3 mm; the opening angle of the cutting edge (14) is 10-15 degrees, and the depth of the cutting edge (14) is 1-1.5 mm; the inclination of the conical surface is 1-3 degrees.

6. The transverse carpal ligament push broach for minimally invasive surgery of carpal tunnel syndrome as claimed in claim 1, wherein: the front side surface and the rear side surface of the handle (3) are both set to be planes, and the width directions of the front side surface and the rear side surface of the handle (3) are parallel to the width directions of the corresponding wedge-shaped inclined surfaces (11).