Angioplasty device with embolic recapture mechanism for treatment of occlusive vascular diseases

Abstract

An angioplasty device with emboli pull-in mechanism is provided that includes an infusion catheter with a proximal end and a distal end. A balloon catheter having an inflatable cavity formed by an inner wall and an outer wall is disposed coaxially with the infusion catheter. The balloon catheter has a proximal end and a distal end. The distal end of the balloon catheter is sealingly attached to the infusion catheter. And the balloon catheter has at least one communicating channel disposed from the outer wall to the inner wall of the balloon catheter. A suction catheter is disposed between the balloon catheter and the infusion catheter. The suction catheter is in fluid communication with the at least one communicating channel in the balloon catheter.

Description

FIELD OF INVENTION [0001] The present invention relates to a medical device suitable for use in intravascular angioplasty. BACKGROUND OF THE INVENTION [0002] Release of atherosclerotic debris is the primary cause of ischemic events such as stroke or myocardial infarction during a routine intravascular angioplasty. A standard balloon inflates and deflates via the change in pressure induced by contrast material and saline. The balloon provides a radial force to the surrounding vessel wall resulting in dilation of occlusive lesions in the vessel wall. The process nevertheless releases debris from the site of angioplasty that can migrate distally with the blood flow to occlude small blood vessels resulting in catastrophic outcomes. While the balloon is completely inflated, the loosened plaque particles are compressed against the vessel wall. However, once the balloon is deflated, the plaque particles can move freely with the blood stream into the distal vasculature and embolize arteries...

AI Technical Summary

Problems solved by technology

Release of atherosclerotic debris is the primary cause of ischemic events such as stroke or myocardial infarction during a routine intravascular angioplasty.

The balloon provides a radial force to the surrounding vessel wall resulting in dilation of occlusive lesions in the vessel wall.

The process nevertheless releases debris from the site of angioplasty that can migrate distally with the blood flow to occlude small blood vessels resulting in catastrophic outcomes.

However, once the balloon is deflated, the plaque particles can move freely with the blood stream into the distal vasculature and embolize arteries of various sizes.

Conventional angioplasty balloons cannot provide protection against debris generated during an angioplasty procedure.

However, the use of new embolic protection devices requires insertion and position of the device into the artery distal to the angioplasty site.

In many cases the lumen of the artery at the atherosclerotic site is reduced to a point that passage of any extra device is difficult.

Furthermore, tortuosity and angulation of the distal vessels prevent successful placement of protection devices.

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