CN211511891U

CN211511891U - Gun type nerve dissector

Info

Publication number: CN211511891U
Application number: CN201921905960.7U
Authority: CN
Inventors: 杨明
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2020-09-18
Anticipated expiration: 2029-11-07

Abstract

The patent of the utility model belongs to the technical field of medical instrument, concretely relates to gun type nerve stripper, include handle, support frame, bolt, solid fixed cylinder, removal core, enclosure nut, spring, stay tube and peel off the silk. Compared with the prior art, the utility model has strong adaptability, and can meet the operation requirements under different anatomical structure loosening degrees and soft tissue deformation degrees; the length of the working end is adjustable, the bending flexibility is strong, and the cutting function is achieved; in the operation, under the condition of limited operation range, the application can reduce the times of changing the operation visual field and effectively shorten the operation time.

Description

Gun type nerve dissector

Technical Field

The patent of the utility model belongs to the technical field of medical instrument, concretely relates to gun type nerve dissector.

Background

The existing nerve dissector is only composed of a dissecting head, a handle and a dissecting rod for connecting the dissecting head and the handle. In operation, the dissector head is used to dissect the nerve and its surrounding soft tissue.

There are some disadvantages in using existing nerve dissectors: the extension length of the stripping head can not be adjusted, and when the extension length is not enough, the nerve is easy to fall off; when the extension is too long, other tissues are easily injured by touch during the too long stripping; the stripping head has no toughness, and is easy to cause touch injury under the condition of limited operation space and visual field; the existing stripping heads push and pull the stripping rod backwards in a manual pushing mode to drive the stripping heads to move, the stripping heads cannot be retracted timely in the mode, doctors need to pay attention to the position states of the stripping heads at any time during surgery, and otherwise nerve injury is easily caused; the shape of the stripping head is single, and the adaptability to different anatomical structure loosening degrees and soft tissue deformation degrees is poor; the stripping head has no cutting function.

SUMMERY OF THE UTILITY MODEL

The utility model provides a to foretell problem, a gun type nerve dissector is provided.

In order to achieve the above object, the utility model discloses a technical scheme be: a gun type nerve dissector is characterized by comprising a handle, a support frame, a bolt hole, a fixed cylinder, a movable core, a closed nut, a spring, a support tube and a dissecting wire; the handle is hinged with the support frame through a bolt; the left side of the moving core is provided with external threads which can be movably connected with the closed nut, the right side of the moving core can enter the cavity at the left side of the fixed cylinder and is in sliding connection with the cavity, and the spring is sleeved at the small diameter part at the right end of the moving core; the supporting tube is fixedly connected with the fixed cylinder; the stripping wires are T-shaped and can be bent, and the head parts of the stripping wires are provided with tool bits; the movable core, the fixed cylinder and the support tube are internally provided with holes for the stripping wire cutter head and the linear part to pass through, and the left end of the stripping wire can be fixed on the left side of the movable core through the closed nut.

Preferably, the handle is fixedly connected with the movable core bolt hole, and the support frame is fixedly connected with the fixed cylinder through the bolt hole.

Preferably, the shape of the stripping wire cutter head is a straight round head shape, a sheet shape or a hook knife shape, and the surface of the cutter head is smooth and round; the stripping wire is made of one of medical titanium alloy and stainless steel.

Preferably, the length of the working end of the stripping wire exposed out of the supporting tube can be adjusted by pulling the handle.

Preferably, the material of the closed screw cap, the movable core, the fixed cylinder, the supporting tube, the handle and the supporting frame is one of medical plastics and stainless steel.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

compared with the prior art, when the utility model is used for neurosurgery operation of a patient, (1) the requirements of the nerve dissector under different anatomical structure loosening degrees and soft tissue deformation degrees can be met, and the operation adaptability is strong; (2) the length of the working end is adjustable, the bending flexibility is strong, the cutting function is realized, the nerve falling or the touch injury in the stripping process can be avoided, the cutting function can be realized, and the operation is convenient; (3) in the operation, under the condition of limited operation range, the application can reduce the times of changing the operation visual field and effectively shorten the operation time.

Drawings

In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings used in the description of the embodiment will be briefly introduced, and fig. 1 is a gun-type nerve dissector provided in embodiment 1;

FIG. 2 is a left side view and a front view of the handle, wherein FIG. 2a is a left side view of the handle and FIG. 2b is a front view of the handle;

FIG. 3 is a front view and a left side view of the support frame, wherein FIG. 3a is a front view of the support frame and FIG. 3b is a left side view of the support frame;

FIG. 4 is a front view and a left side view of the stationary barrel and the support tube, wherein FIG. 4a is a front view of the stationary barrel and the support tube, and FIG. 4b is a left side view of the stationary barrel and the support tube;

FIG. 5 is a front and left side view of the moving core; wherein FIG. 5a is a front view of the moving core, and FIG. 5b is a left side view of the moving core;

FIG. 6 is a close-up nut;

FIG. 7 is a release wire;

fig. 8 is an enlarged view of the three-shaped cutting head of the part of the release thread a, wherein fig. 8a-1 to 8a-3 are three views of a straight round head-shaped cutting head, fig. 8b-1 to 8b-3 are three views of a sheet-shaped cutting head, and fig. 8c-1 to 8c-3 are three views of a hook-shaped cutting head.

1-handle, 2-support frame, 3-bolt, 4-fixed cylinder, 5-removal core, 6-blind nut, 7-spring, 8-stay tube, 9-stripping wire, 10-bolt hole.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the present invention is not limited to the limitations of the specific embodiments of the present disclosure.

Example 1

The present invention will be further described with reference to fig. 1-8, wherein the method of assembling the gun-type nerve dissector shown in fig. 1 comprises:

A. preparing materials:

the material of the sealing nut 6, the moving core 5, the fixed cylinder 4, the supporting tube 8, the handle 1, the supporting frame 2 and the stripping wire 9 is medical stainless steel, namely stainless steel containing 18% of chromium and 10% of nickel.

The fixed cylinder 4 and the supporting tube 8 are integrally designed and manufactured, the inner diameter of the left side of the fixed cylinder 4 is 10mm, and the inner diameter of the supporting tube 8 is 3 mm.

The length of the stripping wire is 477mm, the diameter of the position (the position of a cutter head) where the size of the stripping wire is the largest is 2.45mm, and the length of the cutter head is 5-6. mm.

The length of the spring 7 in a natural state is 55mm, and the distance between adjacent spirals is 2.5 mm.

B. The support frame 2 is fixedly connected with the fixed cylinder 4 through a bolt hole 10, namely the support frame 2 and the fixed cylinder 4 are fixed together through the bolt hole 10 by additionally installing a bolt;

the handle 1 and the movable core 5 are fixedly connected through the bolt hole 10, namely the handle 1 and the movable core 5 are fixed together through the bolt hole 10 and a bolt.

C. The spring 7 is sleeved outside the small diameter part at the rightmost end of the movable core 5, and then the right side of the movable core 5 and the spring 7 are inserted into the cavity at the left side of the fixed cylinder 4.

D. The support frame 2 and the handle 1 are hinged through a bolt 3.

E. The handle 1 is pulled, the support frame 2 and the handle 1 are tightened, the spring 7 is compressed to the shortest (shortened by 15mm compared with the natural state), a stripping wire 9 is selected, the stripping wire 9 penetrates into the movable core 5, the fixed cylinder 4 and the support tube 8 through a hole in the left side of the movable core 5 until a tool bit of the stripping wire 9 penetrates out of the support tube 8.

F. And screwing a sealing nut 6 to the left side of the movable core 5 and screwing, fixing the left end of the stripping wire 9 and finishing the assembly.

G. If the stripping wires 9 need to be replaced, the closing nut 6 is unscrewed, and the stripping wires 9 can be withdrawn and replaced with new stripping wires 9.

Use of gun-type nerve dissector: a preoperative doctor can detect the loosening degree of an anatomical structure and the deformation degree of soft tissues of an operation part through imaging equipment to select and install a proper stripping wire, namely if the anatomical structure is tightly bonded or even wraps nerves and blood vessels, the stripping wire with a sheet-shaped cutter head is suitable to be selected; if the anatomical structure is loosened to a greater extent, a stripping wire with a straight rounded nose tip may be selected; if a cutting operation is required during the surgery, a stripping wire with a hook knife head can be used. When the dissection structure/soft tissue is stripped, if the stripping is not enough to be unfavorable for completely cutting the harmful tissue, the handle can be pulled to extend the length of the stripping wire exposed out of the supporting tube, so as to completely strip the harmful tissue; when the stripping wire with the hook knife head is used for cutting, the handle is firstly tightened to enable the stripping wire to extend out of the supporting tube more, then the hook knife hooks the harmful tissue to be cut, then the handle is loosened to enable the stripping wire to gradually retract into the supporting tube, and the hook knife is driven to cut the harmful tissue.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes to be applied in other fields, but all the technical matters of the present invention are not departed from the technical contents of the present invention, and any simple modification and equivalent changes made to the above embodiments according to the technical matters of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A gun type nerve dissector is characterized by comprising a handle (1), a support frame (2), a bolt (3), a fixed cylinder (4), a movable core (5), a closed nut (6), a spring (7), a support tube (8) and a dissecting wire (9); the handle (1) is hinged with the support frame (2) through a bolt (3), the left side of the moving core (5) is provided with external threads which can be movably connected with the closed nut (6), the right side of the moving core (5) can enter the left cavity of the fixed cylinder (4) and is in sliding connection with the left cavity, and the spring (7) is sleeved on the part with the smallest diameter at the right end of the moving core (5); the supporting tube (8) is fixedly connected with the fixed cylinder (4); the stripping wires (9) are T-shaped and can be bent, and the working ends of the stripping wires are provided with tool bits; the inner holes of the moving core (5), the fixed cylinder (4) and the supporting tube (8) can allow the cutter head and the linear part of the stripping wire (9) to pass through, and the left end head of the stripping wire (9) can be fixed on the left side of the moving core (5) through the closed nut (6).

2. The gun-type nerve dissector according to claim 1, characterized in that the handle (1) and the movable core (5) are fixedly connected through a bolt hole (10), and the support frame (2) and the fixed cylinder (4) are fixedly connected through the bolt hole (10).

3. The gun-type nerve dissector according to claim 1, characterized in that the dissector wire (9) has a blade head with a shape of a straight round head, a sheet or a hook-knife, and the surface of the blade head is smooth and round; the stripping wire (9) is made of one of medical titanium alloy or stainless steel.

4. The gun-type nerve dissector according to claim 1, characterized in that the length of the working end of the dissector wire (9) exposed from the support tube (8) can be adjusted by pulling the handle (1).

5. The gun-type nerve dissector according to claim 1, characterized in that the sealing nut (6), the movable core (5), the fixed cylinder (4), the supporting tube (8), the handle (1) and the supporting frame (2) are made of one of medical plastics or stainless steel.