Delivery system for intravascular device with netting

Abstract

In a cardiac double stent having an outer netting over an inner scaffolding, a limiting ridge for defining advancement of the outer netting over the inner scaffolding, and locking clips integrated in the outer netting for engaging the scaffolding at the insertion limit, assures definite placement and avoids shifting or movement from retracting of the delivery device. The delivery device further includes restricting ridges limiting advancement of the inner netting to overlie the inner scaffolding a substantially equal portion on the proximate and distal ends of a guide wire such that balloon catheter expands first at the overlying portion outside the inner scaffolding to sealably contact the lumen wall on each side of the scaffolding to prevent contamination.

Description

Background technique [0001] Many medical intravascular devices are currently used temporarily or permanently in the human body to address conditions related to hypertension, diabetes and stroke. One example of an intravascular device is a stent used eg in coronary angioplasty. Stents are small mechanical devices that can be implanted within vascular structures, such as blood vessels or veins, that are mechanically expandable to maintain a patent lumen at the site of stenosis, allowing a substantially unobstructed blood flow path therethrough. Stents can also be used to support areas of vessel walls that are prone to collapse. [0002] Mechanical re-dilation of narrowed vessels sometimes results in tissue damage at the site of the stenosis or obstruction. Such injury often stimulates thrombus formation at the site and releases tissue fragments that then block fluid flow within the vessel. In addition, if the condition progresses further, it can cause significant neoinitial h...

AI Technical Summary

Problems solved by technology

However, local drug delivery through stents is limited by the size of the surface area available for drug elution

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