Method and apparatus for controlling infusion volume

Details Method and apparatus for controlling infusion volume Method and apparatus for controlling infusion volume

1997-06-11

1999-05-04

Thorpe, Timothy S.

Pumps

Condition responsive control of pump drive motor

Single motor control element responsive to means sensing...

417 18, 604 67, 604253, F04B 4900

Patent

active

058996656

ABSTRACT:
A flow sensor detects drops of infusion fluid that enter the drip chamber of an infusion system and generates a drop-detection signal indicating each drop detected. A setting controller receives the drop-detection signals from the flow sensor and counts the drops detected and then determines the fluid-flow rate of infusion fluid into the drip chamber. The setting controller then sets the infusion pump so that the fluid-flow rate of the infusion pump substantially matches the fluid-flow rate of the drip chamber. A motion sensor detects drip-chamber movement and generates a motion-detection signal indicating the motion state of the drip chamber. A maintaining controller is coupled to receive the motion-detection signal from the motion sensor. The maintaining controller also stores a signal that indicates a stationary drip chamber. The maintaining controller compares the motion-detection signal to the stored signal to determine if drip chamber movement has occurred, and if drip-chamber movement has occurred it maintains the fluid-flow rate of the infusion pump as set immediately prior to the detection of drip-chamber movement.

REFERENCES:
patent: 4786800 (1988-11-01), Kamen
patent: 4857048 (1989-08-01), Simons et al.

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