CN2601642Y

CN2601642Y - Two-steps discharging awl-net cavity vein filter

Info

Publication number: CN2601642Y
Application number: CN 03200732
Authority: CN
Inventors: 陈光利; 梁熙虹
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-01-13
Filing date: 2003-01-13
Publication date: 2004-02-04
Anticipated expiration: 2013-01-13

Abstract

The utility model relates to a conical net type caval filter with two step release, comprising a plurality of straight stainless steel silks. One end of the silks are fixed together as a fixing end, the silks uniformly spread with the fixing end bend outward in identical angle. The silks entirety form a conoid stainless steel strainer. The stainless steel silks are divided into two groups, each group comprises three to six silks. A group is short stainless steel silks group with shorter length of stainless steel silks. The other group is long stainless steel silks group, the length of the silks is longer and hooks are arranged on the end of the silks. The two groups of stainless steel silks are uniformly distributed at intervals. The utility model adopts two different groups of short or long stainless steel silks and is released in two steps so that the problem of position offset is solved and the lung infarction can be better prevented.

Description

Two steps discharged the awl-net cavity vein filter

Technical field

This utility model relates to a kind of medical apparatus and instruments, is meant a kind of two steps release awl-net cavity vein filter that prevents that deep venous thrombosis from coming off and causing the lung infraction especially.

Background technology

The form of existing vena cava filter is a lot, but mostly be to discharge in a step, promptly once open when implanting, as the Radix Curcumae odor type filter of U.S. COOK company, four lower limbs are opened simultaneously in the dispose procedure, wayward vena cava filter lay form, may produce the top and leave centrage, the position skew appears in the deflection sidewall, cause the opening of sieve size of duty inhomogeneous, influence filter effect.

The existing vena cava filter complex structure that can prevent the position skew requires processing technology high, as: the SimonNitionl filter is to make with Ultimum Ti.

Summary of the invention

The purpose of this utility model is to provide a kind of two steps to discharge the awl-net cavity vein filter, and it adopts long and short two groups of stainless steel silk groups, discharges in two steps, has solved the problem of position skew, prevents the lung infraction better.

The purpose of this utility model is achieved in that

A kind of two steps discharge the awl-net cavity vein filter, it comprises: some straight stainless steel silks 1, their end flocks together fixing, be stiff end 2, every stainless steel silk outwards bends identical even angle by stiff end respectively and opens, its whole cone-shaped stainless steel wire gauze filter that forms, some stainless steel silks are divided into 2 groups, every group 3～6, one group is short stainless steel silk group 101, and its stainless steel silk length is short slightly, and another group is long stainless steel silk group 102, its stainless steel silk length grows slightly and end has crotch 3, two groups of stainless steel silk groups are spaced apart equably mutually, discharge in two steps during implantation, and short stainless steel silk group discharges earlier, long afterwards stainless steel silk group discharges again, and stiff end is provided with the guiding joint and emits 4.

Described crotch-shaped is for tangentially bending along taper bottom surface circumference earlier, again along this circumferential outer direction bending of dispersing.Described guiding engages to emit and is shaped as the short tube that seal the front portion.

This utility model has following advantage and good effect:

This vena cava filter can make the lung infraction drop to 0.6% from 36% after implanting postcava or superior vena cava, reached better clinical effectiveness, this utility model is in conjunction with the advantage of existing filter, use simple structure, effectively prevented to occur in the implantation process skew, improve its performance, prevent the lung infraction better.

Description of drawings

Fig. 1 is the front view of this utility model embodiment;

Fig. 2 is the vertical view of this utility model embodiment.

The specific embodiment

Describe this utility model in detail below in conjunction with drawings and Examples.

As shown in the figure, a kind of two steps discharge the awl-net cavity vein filter, it comprises: some straight stainless steel silks 1, their end flocks together fixing, be stiff end 2, every stainless steel silk outwards bends identical even angle by stiff end respectively and opens, its whole cone-shaped stainless steel wire gauze filter that forms, some stainless steel silks are divided into 2 groups, and 3～6 every group, one group is short stainless steel silk group 101, its stainless steel silk length is short slightly, another group is for long stainless steel silk group 102, its stainless steel silk length grow slightly and end to have 3, two groups of stainless steel silk groups of crotch spaced apart equably mutually, discharge in two steps during implantation, short stainless steel silk group discharges earlier, and long afterwards stainless steel silk group discharges again, and stiff end is provided with the guiding joint and emits 4.

Described crotch-shaped is for tangentially bending along taper bottom surface circumference earlier, again along this circumferential outer direction bending of dispersing.Described guiding engages to emit and is shaped as the short tube that seal the front portion, prevents anterior jagged, acute angle damage vein, is beneficial to many stainless steel silks again and fixes.

Present embodiment has been selected the 316L charcoal wire for use, and diameter is 0.45mm.Divide 2 groups by eight steel wires, 4 every group totally 8 steel wires form, an end is fixed, other end homodisperse becomes awl netted, fixes an end and adopts riveted joint or laser weld, its length 3～5mm.One group by four long slightly steel wires, and length is 4.5～5cm, and end is made little hook (0.5～1mm).Other one group four short slightly steel wires, length is 4.2～4.7cm, two groups of space uniform distribution.In implanting dispose procedure, four short steel wire groups at first discharge, carry out coarse positioning by the steel wire tension effect, owing to do not establish crotch, so integral body still can move by trace, the operator can adjust filter discharge the long steel wire group of another group buckle more fully behind the appropriate location this moment, owing to top band crotch, this filter is fixedly secured by the form of carefully adjusting, position, prevents the skew of filter position thereby reach.

Claims

1. a step discharges the awl-net cavity vein filter, it comprises: some straight stainless steel silks (1), their end flocks together fixing, be stiff end (2), every stainless steel silk outwards bends identical even angle by stiff end respectively and opens, its whole cone-shaped stainless steel wire gauze filter that forms, it is characterized in that: some stainless steel silks are divided into 2 groups, every group 3～6, one group is short stainless steel silk group (101), and its stainless steel silk length is short slightly, and another group is long stainless steel silk group (102), its stainless steel silk length grows slightly and end has crotch (3), two groups of stainless steel silk groups are spaced apart equably mutually, discharge in two steps during implantation, and short stainless steel silk group discharges earlier, long afterwards stainless steel silk group discharges again, and stiff end is provided with the guiding joint and emits (4).

2. two steps according to claim 1 discharge the awl-net cavity vein filter, it is characterized in that: described crotch-shaped is for tangentially bending along taper bottom surface circumference earlier, again along this circumferential outer direction bending of dispersing.

3. two steps according to claim 1 discharge the awl-net cavity vein filter, it is characterized in that: described guiding engages to emit and is shaped as the short tube that seal the front portion.