CN2238055Y

CN2238055Y - Marmem pipe type internal support

Info

Publication number: CN2238055Y
Application number: CN 95228192
Authority: CN
Inventors: 徐林
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-28
Filing date: 1995-12-28
Publication date: 1996-10-23
Anticipated expiration: 2005-12-28

Abstract

The utility model relates to a memory alloy pipe type internal bracket. The essential technical proposal is that a memory alloy bracket body is pipe-shaped, and a plurality of transverse cutting slots are arranged on the bracket body. The utility model has the advantages that radial tension can not exist when materials is transported into a pipe cavity because the bracket body can not have mesh holes after the bracket is expanded, and the transporting resistance is small, so the operation is convenient. The force in the direction of the inside diameter of the pipe cavity is large, thus effectively blocking the cells of the pipe cavity to grow, and preventing further occlusion. An inner wall is smooth, pipe wall mucosas and suspending objects are hard to generate, and the utility model has good orientation and can not easily surge. The utility model has simple structure and is convenient to clean and sterilize.

Description

Memorial alloy tubular type inner support

This utility model belongs to a kind of medical device.

Interventional radiology is a novel medical science subject that began in recent years to rise, and inner support then is a medical device important in the interventional therapy.At present, the kind of inner support is a lot, a kind of " memory type inner support " wherein arranged, and shape is spring-like, must pull into long filament during conveying and enter in the body lumen, ambient temperature reaches the body temperature after-contraction and becomes spring-like, make inner support be difficult for accurately being placed in diseased region, because the features of shape of spring, radially holding capacity is little for it, after being subjected to certain external force, Longitudinal Warping can take place.A kind of in addition " tubular type inner support " processes with seamless steel pipe, adds the capable vertical joint-cutting of number on the tube wall, be thin tube-like before carrying, be transported to diseased region after, make its expansion by inferior vena cava balloon dilation, and the shape after the maintenance expansion, its surface is mesh.Because after the expansion mesh is arranged, lumen organization easily grows into, and causes new obstruction, compliance is poor simultaneously, stimulates tissue growth easily: owing to add balloon expandable, operation inconvenience.

The purpose of this utility model provides a kind of memorial alloy tubular type inner support, good bending property, degree of crook self-closing phenomenon can not occur when big yet, transporting resistance is little, bigger radial tension is arranged, simultaneously tube chamber inner tissue is not easy to invade internal stent, avoids tube chamber to stop up again, and is placed on and is difficult for slippage in the tube chamber.

The purpose of this utility model is achieved in that it comprises stake body, and its technical scheme main points are: the stake body of memorial alloy has several horizontal joint-cuttings in a tubular form on the stake body.

Support of the present utility model two ends can also have several vertical joint-cuttings.

During use, with this utility model under lower temperature conditions, make it be rolled into the direct rod shape of minor diameter, be sent to intraluminal diseased region with release catheter, because the effect of body temperature makes the rapid spreading of stake body of memorial alloy, for the support that has only horizontal joint-cutting, be straight-tube shape behind the spreading, it is applicable to thinner tube chamber; Have the support of several vertical joint-cuttings for two ends, two ends are horn-like behind the spreading, and it is applicable to thicker tube chamber, prevents slippage.Owing to the spreading of support enlarges narrow tube chamber, reach the purpose of curing the disease.

This utility model and existing product are compared, and have following advantage: (1) owing to adopt memory alloy material and scientific and reasonable structure, as long as guarantee that temperature is lower than phase transition temperature when carrying in tube chamber, do not have radial tension, and transporting resistance is little, is convenient to operation; When support with after the tissue of tube chamber contacts, ambient temperature raises, and makes it rapid spreading, produces very big radial tension, the maintenance tube chamber is unobstructed.(2) the plate-shaped tubes wall construction can effectively hinder the tube chamber cell and grows into, and simultaneously because inner wall smooth, flow resistance is little, and rack inner wall is difficult for producing float such as mucosa, thereby can prevent effectively that tube chamber is inaccessible again.(3) carry before and after length do not change, be convenient to the location, and the dawn because there is vertical joint-cutting at the support two ends, and the two ends spreading becomes horn-like, be fixed on comparison extra heavy pipe intracavity and be difficult for slippage, keep the effect and the reliability of treatment.(4) simple in structure, be convenient to clean, sterilize.

Below in conjunction with accompanying drawing example is described further.

Fig. 1 is embodiment 1 structural representation.

Fig. 2 is the A-A cutaway view of Fig. 1.

Fig. 3 is embodiment 2 structural representations.

Fig. 4 is the view of example 2 spreading in tube chamber.

See Fig. 1,2, the concrete structure of embodiment 1 is as follows: piped stake body 1 is made by Ultimum Ti, has several uniform horizontal joint-cuttings 2 on the stake body 1.After the described stake body 1 of present embodiment was transported to intraluminal diseased region, spreading was the straight-tube shape (see figure 1).

See Fig. 3,4, the concrete structure of embodiment 2 is as follows: tubular bracket body 1 is made by Ultimum Ti, and the middle part of stake body 1 has uniform horizontal joint-cutting 2, and the two ends of stake body 1 have uniform vertical joint-cutting 3.See Fig. 4, when the described stake body 1 of present embodiment is transported in the tube chamber behind the diseased region, middle spreading becomes straight-tube shape, and the two ends spreading is horn-like.

Claims

1, a kind of memorial alloy tubular type inner support comprises stake body, it is characterized in that: the stake body of memorial alloy has several horizontal joint-cuttings in a tubular form on the stake body.

2, inner support according to claim 1 is characterized in that; The two ends of stake body have several vertical joint-cuttings.