Catheter with selectively rigidified portion

Details Catheter with selectively rigidified portion Catheter with selectively rigidified portion

1984-02-21

1988-09-27

Pellegrino, Stephen C.

Surgery

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

Treating material introduced into or removed from body...

A61M 2500

Patent

active

047739010

ABSTRACT:
A catheter having a relatively soft body formed of a hydrophobic elastomer and a tip portion coated with a water insoluble hydrophilic polymer grafted thereto to impart, in the dry state, rigidity to the tip portion. In use the hydrophilic coating absorbs or adsorbs water with resultant softening of the coating so as to render the tip portion soft. A method of facilitating placement of a catheter utilizing a transitorily rigidified tip portion is taught.

REFERENCES:
patent: 3566874 (1971-03-01), Shephard et al.
patent: 3695921 (1972-10-01), Sheplard et al.
patent: 3736939 (1973-06-01), Taylor
patent: 4306563 (1981-12-01), Iwatshenko

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