3879516 is referenced by 53 patents and cites 7 patents.

A catheter which is relatively rigid in compression and torsion while flexible in bending includes a unitary tubular member including inner and outer layers of a soluble polymer composition, such as polyurethane, whose adjoining surfaces are chemically bonded during manufacture. A filament core, preferably in the form of a coil of the same polymer is embedded within and chemically bonded to the tubular member to form a catheter whose molecules are aligned both longitudinally and along the direction of the coil. Methods of manufacture of the catheter include forming the polymer composition layers within a rigid tube and, alternatively, forming the layers over a rigid supporting rod.

Title
Method of constructing a catheter
Application Number
05/313,124
Publication Number
3879516
Application Date
December 7, 1972
Publication Date
April 22, 1975
Inventor
Wolvek Sidney
Agent
Darby & Darby
Assignee
Technibiotics
IPC
B29d 03/02
B29c 13/04
A61M 25/00
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