CN103316417A - Cone-shaped balloon dilatation catheter - Google Patents

Abstract

The invention discloses a cone-shaped balloon dilatation catheter. A balloon is cone-shaped, the balloon diameter of a proximal end is larger than the balloon diameter of a distal end, preferably, the balloon diameter of the proximal end of the cone-shaped balloon is 0.05 mm larger than the balloon diameter of the distal end of the cone-shaped balloon, and polymers carried with anti-proliferative drugs cover the surface of the dilatation balloon. By means of the cone-shaped balloon dilatation catheter, stenosis lesions of cone-shaped blood vessels can be better solved.

Description

Conical saccule dilating catheter

Technical field

The present invention relates to medical instruments field, particularly a kind of sacculus dilating catheter.

Background technology

Atherosclerosis is the aging modal pathological change form of human vas, is characterized in that ductus arteriosus wall thickens hardening, follows the string and tube chamber dwindles, and mainly involves big-and-middle-sized tremulous pulse and coronary artery.Along with atherosclerotic continuous progress, involve vessel lumen narrow greater than 75% the time, the corresponding organ ischemia symptom can appear.Narrow in order effectively to remove, improve ischemia symptom, stenotic lesion is carried out behind the predilation implanted metal support to come physical property to remove narrow be the most effective treatment means by using sacculus at present.

Fig. 1 is sacculus dilating catheter schematic diagram of the prior art.Present existing sacculus dilating catheter is comprised of (because the present invention partly improves the sacculus that has sacculus dilating catheter now catheter block, conduit reinforcement, conduit and sacculus, other parts are identical with existing sacculus dilating catheter, so in diagram, do not identify), sacculus be with nylon make cylindrical.Sacculus and blood vessel diameter after the expansion are suitable, select corresponding pre-expansion sacculus and rear expansion sacculus according to the lesion vessels reference diameter.Get involved the doctor and by arteries (femoral artery or radial artery) sacculus dilating catheter is sent to diseased region, accurately behind the location, stenotic lesion is carried out balloon expandable.Under the effect of pressure, balloon wall is expressed to blood vessel wall with atherosclerotic plaque, thereby removes local luminal stenosis, improves blood flow.

Existing dilating sacculus is the identical cylindrical dilatation sacculus of two ends lumen diameter, but in the Surgery of reality, find, the blood vessel of human body is that tapered (blood vessel near-end to far-end is tapered a bit, there is gap in the two ends diameter), if select conventional sacculus may make blood vessel near-end or far-end the insufficient or arteria coronaria rupture perforation of predilation occur, this is so that at a loss what to do when getting involved doctor and selecting suitable sacculus for the taper angiostenosis, can not choose the dilating sacculus of suitable this pathological changes.

Summary of the invention

Can not remove the deficiency of taper angiostenosis in order to overcome existing blood saccule dilating catheter, the invention provides a kind of conical saccule dilating catheter, this sacculus can better be removed the stenotic lesion of taper blood vessel.

The present invention proposes a kind of sacculus dilating catheter, this sacculus is tapered, and its proximal part stent diameter is greater than the distal end stent diameter.

Preferably, the proximal part stent diameter of the sacculus of this taper is than the large 0.5mm of distal end stent diameter.

Preferably, this balloon surface bag has the polymer that carries anti-proliferative drugs.

Utilize the sacculus of taper of the present invention can better solve the stenotic lesion of taper blood vessel.

Description of drawings

Fig. 1 is the schematic diagram of sacculus dilating catheter in the prior art;

Fig. 2 is the structure chart of conical saccule dilating catheter of the present invention.

The specific embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.

Because the sacculus in the existing sacculus dilating catheter is identical cylindrical of two ends lumen diameter, therefore when running into the tapered situation of blood vessel of human body, if select conventional sacculus may make blood vessel near-end or far-end the insufficient or arteria coronaria rupture perforation of predilation occur.Therefore the present invention proposes a kind of conical saccule dilating catheter, and this sacculus is a kind of physical solution has the polymer that carries anti-proliferative drugs except the surface bag of human body coronary artery, renal artery, cerebrovascular stenosis sacculus dilating catheter, and this sacculus is made by nylon.

Fig. 2 is the structure chart of conical saccule dilating catheter of the present invention.

The present invention partly improves sacculus on the basis of original sacculus dilating catheter, and its catheter block, conduit reinforcement and conduit are identical with existing sacculus dilating catheter, no longer are described at this.With reference to Fig. 2, the configuration design of dilating sacculus 1 is tapered, wherein the proximal part stent diameter is greater than the distal end stent diameter, for example, can the proximal part balloon diameter be set to than the large 0.5mm of distal end diameter, also can be set to other values, to select different models according to the practical situation of patient's blood vessel.When target vessel is the taper blood vessel, use the taper balloon expandable can make the better of target lesion near-end pre-expansion, far-end can not cause because balloon diameter is excessive the angiorrhexis perforation simultaneously.Utilize conical saccule dilating catheter of the present invention can better solve the stenotic lesion of taper blood vessel.

This conical saccule dilating catheter of the present invention is identical with material and the induction system of existing sacculus, and material is made by nylon material, and difference is that mainly its shape is different, and existing sacculus is cylindrical, and sacculus of the present invention is to be designed to taper.Balloon diameter and blood vessel diameter after the expansion are suitable, select corresponding sacculus according to the lesion vessels reference diameter.Get involved the doctor and by arteries (femoral artery or radial artery) sacculus is sent to diseased region, accurately behind the location, carry out balloon expandable.Under the effect of pressure, sacculus is expressed to blood vessel wall with atherosclerotic plaque, thereby removes local luminal stenosis, improves blood flow.

Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; be understood that; the above only is specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (3)

1. a conical saccule dilating catheter is characterized in that, this sacculus is tapered, and its proximal part balloon diameter is greater than the distal end balloon diameter.

2. conical saccule dilating catheter according to claim 1 is characterized in that, the proximal part balloon diameter of this taper foley's tube is than the large 0.5mm of distal end balloon diameter.

3. sacculus dilating catheter according to claim 1 and 2 is characterized in that, this balloon surface bag has the polymer that carries anti-proliferative drugs.

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