CN2668072Y

CN2668072Y - Self-retraction antiskid thorn-like filter

Info

Publication number: CN2668072Y
Application number: CNU2003201287862U
Authority: CN
Inventors: 林徐; 徐林
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-26
Filing date: 2003-12-26
Publication date: 2005-01-05
Anticipated expiration: 2013-12-26

Abstract

The utility model provides a self-retraction antiskid thorn-like filter, comprising a supporter, a filter portion, a taking-out hook and an antiskid thorn. The antiskid thorn and the filter portion are integration; a connecting ring is provided between the antiskid thorn and the filter portion; the antiskid thorn can change the included angle between the antiskid thorn and the supporter together with the filter portion; the tip flat surface of the antiskid thorn is parallel to the filter. The advantages of the self-retraction antiskid thorn-like filter are that: due to the fact that the antiskid thorn and the filter portion are the integration, and make the ring type connection with the supporter, when the diameter of the filter is decreased, the thorn can retract into the filter, which avoids the guide tube wall being scratched, decreases the conveying resistance force, prevents the jammed phenomenon of the filter in the guide tube happening, and facilitates the taking-out of the filter.

Description

Self-retracted antiskid spine type strainer

Technical field:

This utility model belongs to the intervention medical device of a kind of medical device product, particularly a kind of Self-retracted antiskid spine type strainer.

Background technology:

Self-retracted antiskid spine type strainer (hereinafter to be referred as filter) is a kind of intervention medical device that is specifically designed to mortality lung infraction due to the prevention venous thrombosis.Since sixties Mo, filter came out, existing both at home and abroad tens kinds of products were widely used in clinical.But at present the most practical a kind of be " vena cava filter " (patent No. is ZL01248188.2), be both in ten days, to take out the dual-purpose filter that can forever put again.No matter this filter is on technology, still on the deploying type shape, compare all and improve a lot with filter in the past, but it still has the following disadvantages: 1, the direction of anti-skidding thorn is changeless, this just makes filter scratch induction system easily in course of conveying, the end of keeping away that filter is stuck in induction system and can not moves forward also can appear, the serious consequence that causes operation to stop.2, be welded on the filter supporter owing to anti-skidding thorn, thus production cost increased, and have problems such as quality of welding spot, wire annealing, make the quality of filter itself and safety be difficult to guarantee.

Summary of the invention:

The purpose of this utility model provides a kind of filter, the anti-skidding thorn of this filter bounces back in it is sent to delivery conduit the time automatically, has reduced transporting resistance, has avoided the damage of anti-skidding thorn to tube wall, overcome the phenomenon appearance that filter blocks in delivery conduit, more helped the taking-up of filter.

The purpose of this utility model is achieved in that it comprises supporter, filter house, taking-up hook and anti-skidding thorn, and anti-skidding thorn is located on filter house and the connecting ring that supporter is connected, and it can change direction along with the filter diameter variation.

Advantage of the present utility model and effect are: because anti-skidding thorn and filter house are one, and become ring type to be connected with supporter, so when the filter diameter reduces (hour be to be admitted in the delivery conduit), this thorn can bounce back in the filter, avoid scratching conduit, reduce transporting resistance, prevent that the taking-up of the filter of being more convenient for from appearring in the phenomenon that filter blocks in conduit.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is anti-skidding thorn and supporter connection diagram.

The specific embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing:

See Fig. 1-2, this utility model concrete structure is as follows: when filter house 2 was connected with supporter 1 ring, the ring end steel wire of filter house 2 continued to prolong, and forms anti-skidding thorn 4 and most advanced and sophisticated plane 5 thereof.When the filter reduced, the angle of filter house 2 reduces, and anti-skidding thorn 4 is that rotate in the counterclockwise direction at the center with the connecting ring, up to should stinging withdrawal, and makes the most advanced and sophisticated plane 5 of thorn parallel with supporter and catheter wall.It is constant in the center of filter to keep taking out hook 3 in the diameter contraction process.

Claims

1. Self-retracted antiskid spine type strainer, comprise supporter, filter house, taking-up hook and anti-skidding thorn, it is characterized in that: anti-skidding thorn (4) is an one with filter house (2), be connecting ring between the two, anti-skidding thorn (4) can be with the angle between filter house (2) change and the supporter (1), and anti-skidding perverse most advanced and sophisticated plane is parallel with filter house.