Softening catheter

Details Softening catheter Softening catheter

Filed on

1988-03-22

Date issued

1989-07-11

Examiner

Pellegrino, Stephen C.

Patent Class

Surgery

SubClass

Means for introducing or removing material from body for...

SubSubClass

Treating material introduced into or removed from body...

Other Related Categories

604265, 604280, 128768, A61M 500

Type

Patent

Status

active

Patent number

048468126

Description

ABSTRACT:
A tubular cannula has distal and proximal end portions, a central passageway from the distal end portion of the proximal portion and a transition section connecting the distal and proximal end portions. The proximal end portion has larger inner and outer diamters and has thicker walls than does the distal end portion. The diameter difference and thickness are effectuated in a gradual manner in a transition section. The cannula is constructed of a material that softens on being inserted into a living body and/or contacted with an aqueous medium. The cannula combines kink resistance external of the living body with the advantages of a softening and generally swellable catheter.

REFERENCES:
patent: 3566874 (1971-03-01), Shepherd
patent: 4381008 (1983-04-01), Thomas et al.
patent: 4596563 (1986-06-01), Pande
patent: 4636346 (1987-01-01), Gold et al.
patent: 4668221 (1987-05-01), Luther
patent: 4728322 (1988-03-01), Walker et al.

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