CN200973739Y

CN200973739Y - Intervertebral disc sleeve type fiber annular tissue incising scalpel

Info

Publication number: CN200973739Y
Application number: CN 200620028683
Authority: CN
Inventors: 谭锐; 吴大光
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-04-26
Filing date: 2006-04-26
Publication date: 2007-11-14
Anticipated expiration: 2016-04-26

Abstract

A sleeve incision knife for fibrous ring of intervertebral disk belongs to a medical instrument, and is characterized in that a knife bar is positioned inside a sleeve in a way that the front end thereof is in screw connection with a regulating rode; the middle part of the knife bar is movably connected with a bushing that is in fixed connection with the sleeve; and a spring is arranged on a part of knife bar between the front end and the bushing. The blade of the knife is tapered (or arc or linear), and the cross section of the tapered blade is crisscross or likes the Chinese character 'mi'. When used in surgery, the tail end of the sleeve is covered around the operation site to separate from the surrounding tissues, and the knife bar is pushed out of the sleeve by rotating the regulating rod to incise the diseased part, with good safety and high accuracy. The incision depth is controlled by adjusting the rotation angle of the regulating rod. The utility model has the advantages of shortened operation time, no damage to nerves and vessels, rapid postoperative recovery, less postoperative sequelae, simple structure, and low cost.

Description

Annulus fibrosus disci intervertebralis sleeve incision knife

Technical field

This utility model relates to the improvement of fibrous ring incision knife, is a kind of annulus fibrosus disci intervertebralis sleeve incision knife specifically, belongs to medical apparatus and instruments.

Background technology

Along with Wicresoft's development of intervertebral disc prolapse operation, increasing intervertebral disc prolapse patient accepts Wicresoft's treatment.But, the most thorny issue is in the intervertebral disc prolapse Minimally Invasive Surgery: after annulus fibrosus disci intervertebralis is " mound shape " protuberance outthrust, because the inside vertebral pulp pressure of outthrust is higher, cause the fibrous ring and the posterior longitudinal ligament tension force at outstanding position to increase, make the protuberance site surface smooth, tough hard, dural sac and nerve root are adjoined in the outthrust surface simultaneously.Adopt traditional long handle fibrous ring incision knife; because blade does not have protector; when cutting the outthrust surface; in order not damage dural sac and nerve root; will dural sac and nerve root be drawn back in addition safekeeping with nerve hook, increase the difficulty and the time of operation, regular meeting causes dural sac to break or the harassing and wrecking and the damage of nerve root again; overprotection can directly cause the nerve root edema, and postoperative patient occur to be suffered from limb the pain increased and consequence such as numbness.In addition, the patient uses traditional long handle fibrous ring incision knife firmly to be difficult for grasping, the little outthrust surface texture that is difficult to puncture of exerting oneself, the excessive tissue such as Intraabdominal blood vessel that injures easily again of exerting oneself.

Summary of the invention

The purpose of this utility model is at above-mentioned deficiency, provide a kind of simple in structure, cost is low, can accurately cut annulus fibrosus disci intervertebralis, the reliable annulus fibrosus disci intervertebralis sleeve of operation safety incision knife.

The purpose of this utility model is achieved in that

This annulus fibrosus disci intervertebralis sleeve incision knife is made of the knife bar that has cutter head, is characterized in that knife bar is positioned among the sleeve, and the knife bar front end is connected with adjusting rod, and adjusting rod is threaded with barrel forward end; Knife bar middle-end and lining are slidingly connected, and lining is fixedlyed connected with sleeve; Be provided with spring around the knife bar middle-end between knife bar front end and lining.

This annulus fibrosus disci intervertebralis sleeve incision knife can be furnished with at least one knife bar with difformity and size cutter head, and the cutter head cutting edge shape can be circular arc, linear or taper etc.; The cross sectional shape of taper blade can be cross or M shape etc.

This utility model is simple in structure, can select existing stainless steel and other metal materials and standard member for use, and adopts conventional processes to make, and implements easily.This utility model is applied in intervertebral disc prolapse Minimally Invasive Surgery fibrous ring and cuts; at first barrel end is fixed in operative site; make with on every side other separate tissue and separate; the turn adjusting rod makes the slowly mobile barrel end incision diseased region that stretches out of knife bar then, is issued to the purpose of cutting the fibrous ring tissue safely, accurately, reliably in telescopic protection.The penetraction depth of cutter head is accurately controlled by the angle of adjusting rod turn, thereby has shortened operating time, has reduced the harassing and wrecking to nerve, has stopped the damage of nerve and blood vessel, makes patient's post-operative recovery fast, and the sequela shape is few.The utlity model has advantages such as simple in structure, that cost is low, can accurately cut annulus fibrosus disci intervertebralis, operation safety is reliable, have promotional value.

Description of drawings

Fig. 1 is the structural representation of a kind of embodiment of this utility model.

Fig. 2 is an A-A cross-sectional view among Fig. 1.

Fig. 3 is that cutting edge shape is the structural representation of rectilinear cutter head.

Fig. 4 is that cutting edge shape is that the tapered cross-section is the structural representation of criss-cross cutter head.

Fig. 5 is a B-B cross-sectional view among Fig. 4.

Among the figure: 1 adjusting rod, 2 sleeve terminations, 3 sleeves, 4 knife bars, 41 knife bar front ends, 42 knife bar middle-ends, 5 cutter heads, 6 linings, 7 springs.

The specific embodiment

This utility model is further described with the embodiment that provides below in conjunction with accompanying drawing.

With reference to accompanying drawing 1,2, this annulus fibrosus disci intervertebralis sleeve incision knife is made of the knife bar 4 that has cutter head 5, and knife bar is positioned among the sleeve 3, and knife bar front end 41 is connected with adjusting rod 1, and the sleeve termination 2 that adjusting rod is connected with sleeve is threaded.Knife bar middle-end 42 is slidingly connected with lining 6, and lining is fixedlyed connected with sleeve.Be provided with spring 7 around the knife bar middle-end between knife bar front end and lining.

During operation, earlier jacket casing is covered on the fibrous ring place, the turn adjusting rod makes knife bar move along downward direction among Fig. 1 then, and cutter head stretches out barrel end and cuts fibrous ring, and operation is accurate because sleeved protection makes, safety, reliable.

This utility model designer implements a series of this annulus fibrosus disci intervertebralis sleeve incision knifes by embodiment, sleeve diameter is respectively 1.0,0.8,0.6,0.5 centimetres, and the cutter head cutting edge shape can be circular arc (as shown in Figure 1), linear (as shown in Figure 3) or taper (as shown in Figure 4); The cross sectional shape of taper blade can be cross (as shown in Figure 5) or M shape (accompanying drawing omission) or the like, to adapt to the cutting operation to different lesions.Set the screw thread that adjusting rod is connected with the sleeve termination and the fit dimension parameter of other parts, can reaching rotation adjusting rod one, all to control the cutter head dinting depth be 1 millimeter, and to define the cutter head dinting depth be 1 centimetre.Inner clinic trial, simple to operate, time saving and energy saving, can accurately cut the favorable comment that annulus fibrosus disci intervertebralis, operation safety reliably are subjected to the medical worker, obtain promising result.

Claims

1, a kind of annulus fibrosus disci intervertebralis sleeve incision knife is made of the knife bar that has cutter head, it is characterized in that knife bar is positioned among the sleeve, and the knife bar front end is connected with adjusting rod, and adjusting rod is threaded with barrel forward end; Knife bar middle-end and lining are slidingly connected, and lining is fixedlyed connected with sleeve; Be provided with spring around the knife bar middle-end between knife bar front end and lining.

2, annulus fibrosus disci intervertebralis sleeve incision knife according to claim 1 is characterized in that the cutter head cutting edge shape is circular arc, linear or taper.

3, annulus fibrosus disci intervertebralis sleeve incision knife according to claim 2, the cross sectional shape that it is characterized in that the taper blade is cross or M shape.