CN2195951Y

CN2195951Y - Catheter for expanding heart blood vessel

Info

Publication number: CN2195951Y
Application number: CN 94224369
Authority: CN
Inventors: 陈伟文; 陈传荣
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-07-21
Filing date: 1994-07-21
Publication date: 1995-05-03
Anticipated expiration: 2004-07-21

Abstract

The utility model relates to a double-concave sacculus dilation catheter which is composed of a double-concave saccule outer catheter, an inner catheter, and a y-shaped joint. When the utility model is used, the blood circulation can not blocked completely because a double-concave structure is arranged on the sacculus. In addition, the space between the outer catheter and the inner catheter is relatively large, which makes the sacculus engorged, cuts down the emptying time, and in turn further reduces the influence on blood circulation. The utility model has the advantages of high curative effect, safety, easy operation, and low cost.

Description

Catheter for expanding heart blood vessel

This utility model relates to a kind of improvement of angiocarpy sacculus dilating catheter.

The comparatively ideal sacculus dilating catheter that is used for diseases such as narrow cardiac valve of dilation therapy and trunk so far is aboveground (INOUE) foley's tube (U.S. Patent number 4,327,736), generally acknowledged any polyethylene balloon dilating catheter that is better than being used for same purpose.But because of the cross section of aboveground sacculus is garden shape, cause the complete occlude blood circulation of process of expansion, can cause severe hypotension, even realize of short duration forfeiture and tic that certain risk is arranged.

The purpose of this utility model provides the incomplete occlude blood circulation of a kind of balloon expandable process sacculus dilating catheter.

The purpose of this utility model can reach by following measure: sacculus is made the cross section be double concave, the full order of process of expansion sacculus is earlier from far-end, near-end and be central part at last then.The expansive force that produces when sacculus is full makes narrow cardiac valve or trunk obtain expansion, and in this process, part blood still can pass through from the groove of sacculus both sides, and blood circulation not exclusively is blocked.

The utility model has the advantages that: the process of expansion sacculus can be fine be fixed on narrow positions and not slippage and do not wear out ventricle, and TPER and emptying time are shorter, and be simple to operate, little to the blood circulation influence.Secondly, owing to have only interior outer catheter, reduced exhaustor between interior outer catheter than aboveground sacculus, thus in space between outer catheter bigger, make the time shortening of the full and emptying of sacculus, further reduce sanguimotor influence.In addition, the double concave sacculus is when the narrow Bicuspid valve of expansion, and because of similar surgery Bicuspid valve elastic separating plier structure after the inflation, thereby it is more reasonable to be the sacculus of garden shape than the cross section.

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

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

Below in conjunction with accompanying drawing this utility model is described in further detail.

With reference to Fig. 1, this utility model reaches " Y " type joint (4) that combines together with outer catheter (2) by sacculus (1), outer catheter (2), inner catheter (3) and forms.On inner catheter (3) the near-end ferrule acus (5) is arranged, have " L " type interface (6) and sacculus to fill hole (7) on " Y " type joint (4), full hole (7) communicates with sacculus (1) by the space between outer catheter (2) and inner catheter (3).

With reference to Fig. 2, sacculus (1) is by internal layer rubber (8), outer layer rubber (9), and the thickening layer sheet rubber (11) of middle level nylon wire (10) and outer layer rubber (9) is formed.Last 0 degree of outer layer rubber (9) and middle level nylon wire (10) and 180 degree (longitude) have been located rib (12), make the full process of sacculus (1) vertical dual-cavity (13) occur.

During operation, the concave-concave sacculus dilating catheter is injected the narrow positions of cardiac valve or trunk etc., injecting the dilution contrast agent fast from the full hole (7) of sacculus partly expands sacculus (1) far-end earlier, and the whole conduit of pulling back makes the middle part of sacculus (1) be embedded in stenosis,---near-end---central authorities order expands rapidly sacculus this moment (1) from far-end, this expansible order make sacculus (1) well " lock " be difficult for slippage in narrow positions.Dual-cavity (13) structure on the sacculus (1) makes its full process narrow positions still have blood to pass through to reduce to sanguimotor influence.Owing to do not need exhaustor between outer catheter (2) and inner catheter (3), thereby the space is bigger, make the full and emptying time shortening of sacculus (1), also have the effect of minimizing to the blood circulation influence.

Claims

1, a kind of novel angiocarpy sacculus dilating catheter, reaching " Y " type joint (4) that combines together with outer catheter by sacculus (1), outer catheter (2), inner catheter (3) forms, 0 degree and 180 degree (longitude) that it is characterized in that the middle level nylon wire (10) of sacculus (1) and outer layer rubber (9) have been located rib (12), are vertical double-concave structure (13) when making sacculus (1) full.