a conical balloon

Abstract

The invention belongs to the technical field of medical instrument manufacturing, and relates to a conical stair. The conical stair comprises an expandable balloon and a balloon catheter. The balloon wraps the periphery of the balloon catheter and comprises a first conical section, a second conical section and a cylindrical connecting section which are connected in sequence. The first conical section is made of a non-compliance material, the second conical section is made of a semi-compliance material, and the cylindrical connecting section is made of a compliance material. According to the conical stair, the conical balloon with different-diameter sections is adopted and is more suitable for the situation that the inner diameter is gradually reduced into a conical shape in the axial direction of the blood vessel, the implanting process of a stent can be completed with one time operation, and thus the surgical difficulty is greatly lowered. The compliance of the overall materials of the conical balloon is changed, balloon pressurization expansion can be carried out according to practical vasculopathy features, the balloon can adapt to the plastic deformation of the form of the blood vessel, and the situation of poor wall attaching of the stent is relieved. An ultrasonic sensor is installed in the balloon for positioning, and the conical stair is not like X-rays which can harm the body of a patient.

Description

technical field [0001] The invention relates to a medical balloon used in the technical field of medical device manufacturing to treat tapered diseased blood vessels by percutaneous coronary artery stent intervention, in particular to a tapered balloon suitable for expanding tapered vascular stents. Background technique [0002] Nowadays, cardiovascular disease has become the largest category of diseases that endanger human life and health. The number of deaths due to cardiovascular and cerebrovascular diseases in the world reaches 15 million every year, ranking first in human death due to diseases. Because of its high efficiency and minimal invasiveness, percutaneous coronary stenting has become the most basic and main interventional therapy for the treatment of coronary atherosclerotic stenosis. Percutaneous coronary stent implantation uses balloon catheter technology to hold the metal stent on the periphery of the balloon, and uses the balloon delivery system to make the ...

AI Technical Summary

Problems solved by technology

In addition, the balloons used in conventional vascular stent interventional therapy are either compliant as a whole, and the balloon is uniformly inflated as a whole, which increases the shear stress on the vessel wall at the tapered vessel, causing stent thrombosis; or the balloon as a whole is non-compliant Sexual, not dilatable based on actual vascular lesion

Both types of balloons are difficult to adapt to the plastic deformation of the vessel shape, and cannot achieve accurate positioning of the stent

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