Pressure differential valve and infusion set

Details Pressure differential valve and infusion set Pressure differential valve and infusion set

1997-02-13

1999-08-10

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604 80, 604258, 251 61, A61M 514

Patent

active

059351004

ABSTRACT:
A method and infusion set for consecutively draining liquid medicines from a plurality of containers, such as two containers (1, 2) containing said liquid medicines, the liquid medicine via a differential pressure valve (5a) is fed into a drip chamber (6), wherein the fluid flow is permitted initially from one container (1) by the higher fluid pressure and differential force area from the first container (1) on a diaphragm disk (15), whereby the fluid flow from the second container (2) is stopped and, later an automatic switch to a second container (2) as a source of fluid is effected when the fluid flow from the almost drained first container (1) is at a lower fluid pressure and a smaller differential force area and is exceeded by a higher fluid pressure of the second container (2) and the larger differential force area.

REFERENCES:
patent: 4237880 (1980-12-01), Genese
patent: 4343305 (1982-08-01), Bron
patent: 4534764 (1985-08-01), Mittleman et al.
patent: 4966199 (1990-10-01), Ruschke
patent: 5025829 (1991-06-01), Edwards et al.
patent: 5520661 (1996-05-01), Lal et al.

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