04531943 is referenced by 316 patents and cites 10 patents.

A catheter for insertion in a body orifice or blood vessel comprising an elongated tubular body with a soft, symmetrically deformable member on the distal end thereof for decreasing the likelihood of injury to body tissue upon the insertion and removal thereof. In one embodiment, the tip member comprises a toroidally shaped inflatable and non-distensible expandable "balloon" mounted on the end of the otherwise relatively rigid tip of the catheter. The catheter has a lumen extending the length thereof and communicating with the tip member whereby a fluid may be introduced to control the size, shape and firmness of the tip member. In a second embodiment, the soft deformable tip member comprises an annular plastic or rubber sleeve surrounding the otherwise rigid tip of the catheter and normally extending there beyond by a predetermined distance. The thickness or composition of the sleeve is varied about a circumferential ring so as to provide a preferred location for the collapse of the sleeve.

Title
Catheter with soft deformable tip
Application Number
6/520996
Publication Number
4531943
Application Date
August 8, 1983
Publication Date
July 30, 1985
Inventor
Gilmore T Schjeldahl
Minnetonka
MN, US
Mark A Rydell
Excelsior
MN, US
Robert A Van Tassel
Minnetonka
MN, US
Agent
Douglas L Tschida
Thomas J Nikolai
Orrin M Haugen
Assignee
Angiomedics Corporation
MN, US
IPC
A61M 25/00
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