Infusion pump

Details Infusion pump Infusion pump

1988-03-29

1990-04-24

Pellegrino, Stephen C.

Surgery

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

Treating material introduced into or removed from body...

417 22, 417 36, 128DIG13, 222 14, 604155, A61M 500, F04B 4906

Patent

active

049196502

ABSTRACT:
A portable infusion pump assembly utilizing continuous drive propulsion means (8) to effect automatic and incremental displacement of a plunger (5) within a disposable syringe (3) so as to deliver accurately repeatable volumes of fluid from the syringe (3) over a predetermined period of time.
Intermittent drive of the continuous drive propulsion means (8) is effected. Comparison of desired delivery rate with actual delivery rate is made by use of angular displacement signals received from a shaft encoder (10) attached to the shaft of the continuous propulsion means (8).
This method of control also allows indirect measurement of fluid pressure in the syringe (3) without the need for a pressure sensor to be located in direct contact with the fluid being delivered.

REFERENCES:
patent: 4498843 (1985-02-01), Schneider et al.
patent: 4767406 (1988-08-01), Wadham et al.
patent: 4769009 (1988-09-01), Dykstra

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