Surendra A Amin

US Patent:

48985910, Feb 6, 1990

Filed:

Aug 9, 1988

Appl. No.:

7/229991

Inventors:

Vern L. Liebmann - Sugar Land TX
Glenda S. Villman - Freeport TX
Surendra A. Amin - Lake Charles LA

Assignee:

Mallinckrodt, Inc. - St. Louis MO

International Classification:

A61M 2500

US Classification:

604282

Abstract:

Inner and outer layers of a braided body portion of an intravascular catheter as well as a soft tip portion are formed from different proportioned blends of nylon and copolymer of ester linked polyethylene and polyamide to produce optimum mechanical properties in the catheter. One or more surfaces of the catheter are coated with a hydrogel containing a copolymer of polyurethane and polyvinylpyrrolidone to provide improved lubricity and antithrombogenicity.