High support nitinol tube guidewire with plastic plug transition

Details High support nitinol tube guidewire with plastic plug transition High support nitinol tube guidewire with plastic plug transition

1995-03-30

1997-01-28

Hindenburg, Max

Surgery

Truss

Pad

128657, A61B 500

Patent

active

055969968

ABSTRACT:
A catheter guidewire having an elongate core wire, an elongate tube defining a tube lumen, the proximal end of the tube being affixed to the distal end of the core wire. The tube has a smooth exterior surface and one or more plug segments filling the tube lumen, each plug segment having a stiffness less than that of the core wire and less than that of the proximally preceding plug segment. The proximal end of the proximal most plug segment is affixed to the distal end of the core wire, the distal end of the tube is affixed to the distal most plug segment. A smoothly rounded distal tip extends beyond and is affixed to the distal end of the tube. The tube may be formed of a super-elastic metallic member or formed from a synthetic resin. The tube wall thickness is preferably between 0.002 inches and 0.005 inches.

REFERENCES:
patent: 3789841 (1974-02-01), Antoshkiw
patent: 4884579 (1989-12-01), Engelson
patent: 4925445 (1990-05-01), Sakamoto et al.
patent: 5067489 (1991-11-01), Lind
patent: 5069226 (1991-12-01), Yamauchi et al.
patent: 5176149 (1993-01-01), Grenouillet
patent: 5243996 (1993-09-01), Hall
patent: 5452726 (1995-09-01), Burmeister et al.
55-Nitinol-The Alloy with a Memory: Its Physical Metallurgy, Properties, and Applications, by Jackson et al., 1972, Prepared under contract for NASA. Foreword, pp. 1-2, p. 1037.

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