Double-balloon stent with side holes for expandable branch vessels

Abstract

The invention relates to a branch vessel expanding double-balloon support provided with side holes. The branch vessel expanding double-balloon support comprises an expandable compression support and a double-balloon structure in the expandable compression support, and the double-balloon structure comprises a main branch balloon and a side branch balloon; the expandable compression support comprises two parts which are connected and different in outer diameter, and the two parts, different in outer diameter, of the expandable compression support are arranged in parallel and comprise the main vessel opening part and the main vessel and branch vessel opening part; in addition, the main branch balloon is longer than the side branch balloon and intersects with the side branch balloon, and the length of the side branch balloon stops at the starting position of the support with the smaller outer diameter; the side holes parallel to the long axis direction of the supports are formed in the outer diameter changing position, and the diameter of the side holes is slightly larger than the diameter of the side branch balloon catheter. Markers corresponding to the side holes in position are arranged at the far end of the side branch balloon. The balloon support can expand the main branch and side branch vessels at the same time and is convenient to use and easy to operate.

Description

technical field [0001] The invention belongs to the field of cardiovascular stent medical devices, in particular to an expansion device for use after vascular stenosis (bifurcation lesion), in particular to a double-balloon stent with side holes that can expand branch blood vessels. Background technique [0002] Balloon stent is a treatment device applied to coronary artery and other blood vessel stenosis. By setting the balloon inside the stent, the balloon catheter is introduced into the stenosis of the blood vessel through a micro guide wire for pre-expansion, and then the stent is introduced. The balloon is inflated by injecting the contrast agent, and then the stent installed outside the balloon is expanded to support the narrowed blood vessel. This method is a minimally invasive interventional operation, which has been widely promoted because of its small harm to patients. [0003] However, most of the current balloon stents are for single-vessel lesions, and for bifu...

AI Technical Summary

Problems solved by technology

This patent has the following disadvantages: 1: The position and direction of the opening of the side hole are determined to be sent into the bracket first, and then into the branch micro guide wire

2. The side hole can position the long axis of the stent, but it cannot guarantee that the side hole is facing the opening of the branch, further adjustment is required, and it is very difficult to rotate the stent after it is inserted into the blood vessel

3. For cases where there are lesions at the opening of the branch, it is already very difficult to simply pass the guide wire, and entering the branch through the side hole of the stent in this invention will further increase the difficulty of the operation

[0005] For coronary artery bifurcation lesions, there are disadvantages such as complicated operation, incomplete stent coverage, and ridge formation caused by stent deformation.

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