Sacculus expansion catheter for drug treatment

Abstract

The invention provides a sacculus expansion catheter for drug treatment, which comprises a catheter and a plurality of sacculus bodies fixed on the catheter. The catheter adopts a multi-cavity catheter and comprises a guide wire cavity penetrating through the whole catheter, a sacculus expansion cavity and a drug loading cavity used for accommodating drugs; the sacculus expansion catheter is provided with at least two sacculus bodies which can be separated in expansion to form a closed blood vessel cavity between a blood vessel wall, the sacculus expansion cavity is respectively communicated with one or more corresponding sacculus body / bodies, and the expansion and contraction of the sacculus bodies are controlled through the sacculus expansion cavity; and the parts of the catheter between adjacent sacculus bodies are provided with an opening communicated with the drug loading cavity so that the drugs can be dissolved in the closed blood vessel cavity. Drug losses of the traditional sacculus expansion catheter for drug treatment can be overcome, the drugs can be dissolved in the blood of a patient to treat the pathological area, the narrow area of the blood vessel can be expanded effectively, the high-pressure effects of external drugs on the pathological blood vessel wall can be reduced, and potential adverse effects of the external drugs on the human body can also be avoided.

Description

technical field [0001] The present invention relates to a balloon dilation catheter, more particularly to a drug treatment balloon dilation catheter for treating vascular stenosis, which includes a catheter and a balloon body fixed to the catheter. Background technique [0002] Balloon dilatation catheter is a tool for endovascular angioplasty, which has been widely used in clinical medicine of percutaneous transluminal angioplasty and percutaneous transluminal angioplasty. Under the guidance of medical imaging equipment, the balloon dilation catheter is pushed to the stenotic part of the blood vessel through percutaneous puncture technology, and the balloon is expanded under strict monitoring, so that the stenotic part of the blood vessel is expanded, so as to achieve the purpose of improving blood circulation . However, due to the elastic retraction of dilated blood vessels, proliferation of blood vessel wall cells, and tearing of the intima, the balloon can only temporar...

AI Technical Summary

Problems solved by technology

However, because the drug is located on the surface of the balloon, the current drug therapy balloon dilatation catheter has problems such as non-operative drug loss and uneven drug delivery.

Moreover, for lesions that are continuous, long, or located in several adjacent sections of a blood vessel, the long balloon used will appear "banana-shaped" (that is, bend), which will affect the therapeutic effect

[0008] Therefore, the medical treatment balloon dilatation catheter of the prior art can not meet the treatment requirement well

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