Medication infusion pump with fluoropolymer valve seat

Details Medication infusion pump with fluoropolymer valve seat Medication infusion pump with fluoropolymer valve seat

1994-06-24

1995-07-18

Weiss, John G.

Surgery

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

Treating material introduced into or removed from body...

6048921, 137359, 137364, A61M 100, F16L 500

Patent

active

054337100

ABSTRACT:
A medication infusion pump is provided for use in the programmable delivery of a selected medication to a patient, wherein the pump includes a fluoropolymer valve seat engageable with a nonmetallic valve member. The fluoropolymer valve seat defines a substantially inert and nonadherent surface to prevent accumulation of medication deposits thereon. Such deposits are believed to occur as a result of shear denaturation and/or precipitation in the vicinity of the valve seat, in response to relatively high compression forces applied to the medication as the valve member opens and closes. The fluoropolymer valve seat provides a surface which is particularly nonadherent to protein based medications, such as insulin.

REFERENCES:
patent: 2402950 (1946-07-01), Culver et al.
patent: 2519541 (1950-08-01), Bryant
patent: 4034959 (1977-12-01), Morrison
patent: 4163544 (1979-08-01), Fowler et al.
patent: 4560375 (1985-12-01), Schulte et al.
patent: 4568250 (1986-02-01), Falk et al.
patent: 4573994 (1986-03-01), Fischell et al.
patent: 4958661 (1990-09-01), Holtermann
patent: 5178366 (1993-01-01), Kojima et al.

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