CN2342833Y

CN2342833Y - Conductor for coronary artery plastic operation

Info

Publication number: CN2342833Y
Application number: CN 98206575
Authority: CN
Inventors: 吴光熙; 蒲忠杰
Original assignee: 蒲忠杰; 吴光熙
Current assignee: Lepu Medical Technology Beijing Co Ltd
Priority date: 1998-07-03
Filing date: 1998-07-03
Publication date: 1999-10-13
Anticipated expiration: 2008-07-03

Abstract

The utility model relates to a conducting wire for coronary artery plastic operation, which comprises a leading wire with a contractile section, a smooth head fixedly connected to the head part of the leading wire, a spring wound on both ends of the leading wire and separately fixedly connected with the smooth head and the step of the leading wire, and a casing tube of the leading wire, wherein the front end of the leading wire is mainly made of conical metal wires; the casing tube is sheathed on the spring and approached to the top end of a conduit pipe, and the front end and the back end of the casing tube are separately in smooth transition with the leading wire and the top end of the conduit pipe to present in a bullet head shape. A leading-wire expended filament which is in a coiled-wire shape and is made of superelastic filaments can be fixed on the end of the leading wire, wherein the length of the leading-wire expended filament is from 100cm to 200cm and the diameter of the leading-wire expended filament is from 5cm to 200cm. The leading-wire expended filament ensures the smooth transition between the conduit pipe and the conducting wire in order that the conduit pipe can easily reach the parts which are abruptly turned or seriously blocked, and thus, the replacement is convenient.

Description

Coronary artery urethroptasty lead

This utility model relates to a kind of plain conductor that is used for coronary artery urethroptasty and coronary artery expansion support conveying usefulness.

At present when treatment angiostenosis and obstruction disease; conduit or support often can't be sent to the lesion that needs some sharp-pointed turnings of process just can reach; also can't be sent to the serious lesion of stopping up has taken place; wherein the key of problem is the design of conduit and lead; with regard at present commercially available lead; its common shortcoming is: the transition position between catheter tip and lead is too sharp-pointed; it not only makes conduit be difficult to by complex-shaped path; especially can not be by the place of sharp-pointed turning be arranged; more likely scratch blood vessel; cause danger to the patient; moreover, in clinical practice, run into through regular meeting that the requirement lead is stayed original position but need to change the situation of conduit; present widespread usage is the conduit of more remodeling fast of type linearly, and its shortcoming is the sterilization difficulty.

But the purpose of this utility model is to provide a kind of coronary artery urethroptasty lead that makes catheter tip and lead contact position smooth transition and have the lead-in wire expansion path with quick replacing catheter functions.

Of the present utility model being characterised in that: it contains the lead-in wire 2 that cross-sectional constriction and the front end overwhelming majority are made of tapered filament, with affixed smooth 1 of lead-in wire 2 head, one end and smooth 1 affixed and affixed and part or all of usefulness of step on the other end and the lead-in wire 2 have the spring 3 that the material of higher X ray absorbance makes and are enclosed within on the spring 3 and its front end and going between 2 is very smooth transition and the top of rear end and conduit 6 is the bullet shaped lead-in wire sleeve pipe 4 of the petition of smooth transition on the lead-in wire 2.In addition, pass conduit 6 back at lead-in wire 2 and can be connected with length between 100-200cm, by the lead-in wire expansion path 5 with NiTi super-elasticity filament made of diameter after reeling between 5-200mm at the end of lead-in wire 2.Detail as per accompanying drawing.

In order in conjunction with the embodiments this utility model to be done detailed describing below, show as follows employed accompanying drawing number of present specification and title brief introduction:

Fig. 1, the coronary artery urethroptasty vertical section zoomed-in view of lead;

The A-A section zoomed-in view of Fig. 2, Fig. 1;

Embodiment:

Ask for an interview accompanying drawing.The 1st, smooth head, it is a kind of hemispheric part in addition that is made of plastic, its effect is that prevent to go between 2 front end punctures blood vessel when carrying.The 2nd, lead-in wire, it is made of cross-sectional constriction and the tapered stainless steel silk of the front end overwhelming majority, also available NiTi alloy silk constitutes, its external diameter is in the 0.1-0.8mm scope, its front end can be made stepped step, and its stagewise size and quantity depend on that its length is generally between 150-200cm to the requirement of 2 the flexibility of going between, it and weld between smooth 1, also can be bonding.The 3rd, spring, it is to make with metal Pt-7%Ta, also available stainless steel silk is made, and requires it that higher X ray absorbance is arranged.Its end is mutually bonding with smooth 1, the other end is bonding with the step on the lead-in wire 2, and its effect at first is to absorb X ray, is convenient to develop, secondly 2 the fracture that also is to prevent to go between especially will prevent from the lead-in wire 2 with the top end of conduit 6 phenomenon of ruptures to take place.In a single day when fracture accident taking place, just can from conduit 6, withdraw from lead-in wire 2 by means of spring 3.The 4th, the lead-in wire sleeve pipe made from metal or macromolecular material that is that sub warhead opens, be installed on the transition position of conduit 6 tops and lead-in wire 2, be enclosed within outside the spring 3 with pressure sintering, also available bonding method, its tail end stretches into the top end that is certain inclination angle of conduit 6, its head end is then tangent with the step that is certain inclination angle of lead-in wire 2 as far as possible, thereby it and conduit 6 smooth transition both can have been made, to prevent to go between 2 fracture, more can make lead be easy to have by those place of sharp-pointed turning, the head end that also can make it is the unlikely blood vessel that punctures along with the course of conveying of lead-in wire 2.The 5th, the lead-in wire expansion path, it is made with the NiTi superelastic wire, its diameter is slightly less than the diameter of lead-in wire 2, length is between 100-200cm, be rolled into wheel-like structure, diameter can be contained in the etui between 5-200mm, also available gripping object is fixed its tail end, and its head then welds mutually with the tail end that passes behind the conduit 6 of lead-in wire 2.As long as open etui or take off gripping object, it becomes straight line automatically under the super-elasticity effect, equals lead-in wire 2 has been extended, as long as fix lead-in wire expansion path 5 this moment, just can withdraw from conduit 6 so that realize quick-replaceable purpose.

By drawing as seen, it had both overcome the problem of sharp transitions too between the front end of the ubiquitous conduit 6 of present commercially available lead and the lead-in wire 2, need the pathological changes that just can reach and the serious pathological changes of stopping up has taken place so that conduit 6 can successfully be sent to, and be convenient to change conduit 6 through sharp-pointed turning.

Claims

1. coronary artery urethroptasty lead, contain leaded, smooth head and spring, it is characterized in that: it contains cross-sectional constriction and lead-in wire (2) that the front end overwhelming majority is made of tapered filament, the smooth head (1) affixed with the head of lead-in wire (2), affixed and the affixed and part or all of usefulness of step on the other end and the lead-in wire (2) has the spring (3) that the material of higher X ray absorbance makes and is enclosed within on the spring (3) and is very slick transition between its front end and lead-in wire (2) and the bullet shaped lead-in wire sleeve pipe of petition (4) of the top smooth transition of rear end and conduit (6) with smooth head (1) to go up one end around lead-in wire (2).

2. a kind of coronary artery urethroptasty lead according to claim 1 is characterized in that: lead-in wire (2) pass conduit (6) back the end of this lead-in wire (2) can be connected with length between the 100-200cm, the back diameter lead-in wire expansion path made from NiTi super-elasticity filament (5) between 5-200mm of being reeled.