CN2335575Y

CN2335575Y - Micro-arterial clamp

Info

Publication number: CN2335575Y
Application number: CN 98201810
Authority: CN
Inventors: 张绍东
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-03-03
Filing date: 1998-03-03
Publication date: 1999-09-01
Anticipated expiration: 2008-03-03

Abstract

The utility model relates to a micro arterial clamp which is formed by the folding of titanium wires. The titanium wires are bent into a small ring and then are bent into a bigger ring. Two rings are superposed and both ends of the titanium wires are cross. One end of both ends of each titanium wire is folded inwards to be a U shape. U-shaped wires are mutually parallel. The other end is made into a single branch which is slightly shorter than U-shaped parts. The U-shaped parts and the single branch part are mutually parallel and superposed. The full length of the micro arterial clamp can be 4 to 6 millimetres.

Description

Miniature bulldog clamp

This utility model relates to a kind of the folder and closes minute blood vessel, blocking blood flow, and can open at any time, make the device of revascularization.

In the basic research of cerebrovascular, be extensive use of rat and make cerebral ischemic model at present.Deposit in numerous models, blocking-up intraluminal middle cerebral artery occlusion in rats (MCA) blood flow causes the rat brain ischemia, after a period of time, recovers the Focal Cerebral Ischemia Reperfusion model of vascular flow again, the practical situation during the most approaching human cerebral infarction.The method that realizes this model mainly contains two: threading method.Promptly in the rat internal carotid artery, insert a thin nylon wire to the ramose initial position of MCA, blocking-up MCA blood flow.After a period of time line is extracted out, recovered blood flow.The method is simple to operate, but the ischemia instability, the ischemic area variation is big.Ideal method is that folder closes method, with bulldog clamp the MCA folder is closed, and blocking blood flow after a period of time, is opened clip, recovers blood flow.The method ischemia determines that blocking position is clear and definite, and the ischemic area variation is little.But the method fails always to realize that because be not exclusively used in the bulldog clamp of rat, existing bulldog clamp is used for the people on rat, volume is big, and Heavy Weight is not suitable for rat.

The purpose of this utility model provides a kind of miniature bulldog clamp that can be used for rat, and its volume is little, and is in light weight, can press from both sides easily to close rat MCA and opening again, causes rat brain focal ischemia re-perfusion model.

The purpose of this utility model is achieved in that whole bulldog clamp is converted into by a titanium silk, with one section titanium silk, and earlier curved little ring, curved bigger ring, two rings are overlapping, and little ring is arranged in macro ring, and titanium silk two ends intersect, and this is an annular section.Titanium silk two ends, an end takes the shape of the letter U to inflection, and the gap of U-shaped silk parallel portion is less than the titanium filament diameter, and the other end is single, slightly is shorter than the U-shaped part, and suitable crooked titanium silk makes the U-shaped part parallel, overlapping with single part, and this closes part for folder.The bulldog clamp total length can be the 4-6 millimeter according to need.

This utility model is owing to adopted the Titanium silk to be bent into miniature bulldog clamp, and its volume is little, and is in light weight, simple operation, and the utmost point is applicable to that folder closes capillary vessel in the microsurgery.Titanium silk good springiness, nontoxic, with tissue compatible.Also can keep somewhere in the body, make permanent folder and close use.It can be widely used in the field such as each animal experimental, microsurgery in the basic medical research.

Concrete structure of the present utility model is provided by following examples and accompanying drawing:

Fig. 1 is that this miniature bulldog clamp amplifies overall diagram, shows that being in folder closes state.Fig. 2 shows that miniature bulldog clamp is in open mode.Fig. 3 closes the part partial enlarged drawing for bulldog clamp folder, shows the mutual alignment of bulldog clamp U-shaped part and Dan Zhiduan.

This folder closes by the elasticity folder of titanium silk.Under operating microscope, clamp the macro ring of miniature bulldog clamp with special tweezers, make folder close part and open, can press from both sides and close MCA, blocking blood flow.When needs are opened MCA, only need to reclamp the big loop section of bulldog clamp with tweezers, make folder close part and open, take out bulldog clamp, can recover blood flow.

Claims

1. miniature bulldog clamp is characterized in that: be converted into two eclipsed rings that differ in size by an one metal wire, after the tinsel two ends intersected, an end was converted into U-shaped, and the other end is single, and the two is parallel to each other, overlapping, the about 4-6 millimeter of total length.

2. according to the bulldog clamp of claim 1, it is characterized in that: the tinsel that is converted into miniature bulldog clamp is selected the titanium silk for use.