Flow rate controller for a medication infusion pump

Details Flow rate controller for a medication infusion pump Flow rate controller for a medication infusion pump

1997-02-25

1998-07-28

Buiz, Michael

Surgery

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

Treating material introduced into or removed from body...

A61M 3100

Patent

active

057856818

ABSTRACT:
A flow rate controller is provided for regulating the flow rate of medication delivered to a patient by an implantable medication infusion pump of the constant flow type, to minimize or prevent flow rate increases attributable to fluctuations in ambient pressure. The infusion pump comprises an implantable pump housing with a pressurized medication reservoir therein for continuous flow delivery to the patient through a baseline flow path including a restrictor such as a capillary tube. The controller comprises a pressure responsive control valve for connecting a secondary restrictor such as an additional capillary tube in series with the baseline flow path, to prevent undesired increase in the medication flow rate in the event that the patient temporarily encounters a high altitude ambient pressure.

REFERENCES:
patent: 4258711 (1981-03-01), Tucker et al.
patent: 4714462 (1987-12-01), Didomenico
patent: 4931050 (1990-06-01), Idriss
patent: 5061242 (1991-10-01), Sampson
patent: 5088983 (1992-02-01), Burke
patent: 5207666 (1993-05-01), Idriss et al.

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