Meadox Medicals, Inc.

Scimed Life Systems, Inc.

Kevin S Weadock

David J Lentz

Richard J Zdrahala

Jack Tant

An implantable prosthesis includes a porous polymeric member having pores present in its wall structure wherein these pores contain a variety of therapeutically useful compositions including, collagen, genetically altered cells and piezoelectric materials. A process of preparing such a prosthesis is also disclosed.

Implantable members for receiving therapeutically useful compositions

Devices and methods for rendering an intravascular stent radioactive in-situ, after stent placement. A stent is provided having a tubular body and a first substance immobilized on body. The first substance preferably has a high and selective affinity for a second substance which can be radioactive, cytotoxic or thrombolytic. The first substance can also have an affinity for growth factors or thrombolytic, chemolytic or cytotoxic agents. The stent can be placed across a stenosed blood vessel region, preferably after dilation by angioplasty or atherectomy. After stent placement within the vessel, the second substance can be injected into the blood stream of a patient. With each pass through the stent, the second substance is increasingly bound to the first substance on the stent. Suitable complementary substance pairs include avidin and radio-labeled biotin, protamine and radioactive heparin, and protein and anti-protein antibody.

In-situ radioactive medical device

A heparin-collagen dispersion is provided for impregnating a vascular prosthesis with heparin and collagen. The dispersion is prepared at an alkaline pH to allow the addition of heparin without causing the agglutination of collagen from the dispersion. The impregnation of collagen and heparin within the prosthesis effectively prevents blood loss and thrombus formation after implantation of the prosthesis.

Vascular graft impregnated with a heparin-containing collagen sealant

Vascular graft with a heparin-containing collagen sealant

An implantable prosthesis comprising an expanded polytetraethylene member having pores present in its wall structure wherein said pores contain a solid insoluble biocompatible, biodegradable material of natural origin. A process of preparing said prostheses is also disclosed.

Growing community of inventors

Bound Brook, NJ, United States of America

Kevin S Weadock