Expansible and infusable balloon catheter

Abstract

The invention discloses a balloon catheter capable of expanding lesion and capable of infusing a location of lesion. A balloon portion of the catheter is of a double-layer structure, an inner layer is a semi-compliance or non-compliance expansible balloon, and an outer layer is a high-resilience compliance balloon; the outer-layer balloon covers on the inner-layer balloon, and a certain quantity of micro-pores penetrating the balloon wall are distributed in the high-resilience compliance balloon. When the balloon is independently filled and expanded, the high-resilience compliance balloon is passively expanded so as to expand the location of the lesion; and after the balloon is filled and expanded, when the high-resilience balloon is filled with a perfusion solution, medicine can be infused to a lumen of the human body by virtue of the micro-pores in the balloon wall. Compared with the medicine balloon, the dosage of the medicine can be more precisely controlled; the dosage of the medicine and the type of the dosage can be changed according to requirements; and due to the pressure of the filled outer-layer balloon, the infused medicine can enter deeper blood vessel wall tissue, and a better treatment effect can be achieved. The balloon catheter can also be used for infusing stem cells and other substances at a fixed point.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and relates to a balloon catheter, in particular to an expandable and infusible balloon catheter. Background technique [0002] Drug-eluting stents (DES) have been available for more than 10 years, clinical research and real-world results have confirmed that they greatly reduce the restenosis rate of bare metal stents, but a large number of studies have also pointed out that DES has delayed endothelial healing caused by polymers after implantation , endothelialization insufficiency, and local vascular allergic inflammation. [0003] The development and use of drug-coated balloons (Drug Eluting Balloon, DEB) is aimed at such problems of DES. Before the use of drug balloons, pre-dilation of ordinary balloons (non-compliant or semi-compliant balloons) must be performed in any case, and drug balloons are only used as drug delivery devices. The drug is released and diffused into the blood ve...

AI Technical Summary

Problems solved by technology

[0005] In the prior art, patent publications such as CN105288823A, CN105079951A, CN10541304A, US20110281019A1, and US20120150142A1 are mostly trying to increase the drug loading, increase the adhesive strength of the drug on the balloon wall, and reduce the drug loss during the delivery process of the balloon. Solve fundamental problems such as uncontrollable dose of effective drugs and inability to use repeatedly in one operation for the same patient

Although CN205268803U, CN105079951A, CN104436421A, CN103877673A, CN103908730A, CN203852722U, CN203736601U, CN104436421A and other patent documents propose to close the two ends of the diseased blood vessel, directly perfusing the blood vessel between the two ends solves the problem of narrow drug dosage. Vascular lesions cannot be used directly, stenotic lesions must be pre-dilated with a conventional balloon (non-compliant or semi-compliant balloon) prior to perfusion

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