Flow control system

Details Flow control system Flow control system

1985-04-26

1987-07-21

Dority, Jr., Carroll B.

Surgery

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

Treating material introduced into or removed from body...

128DIG13, 1374875, 340619, A61F 200

Patent

active

046815635

ABSTRACT:
A dual controller for an IV infusion system comprises a microprocessor to concurrently control the rate of infusion through two IV units. The control of the rate of infusion is provided by a stepper motor driven regulator which is selectively positionable for compressibly engaging the IV tubing. A flow sensor employs a case of infrared transparent material which mounts to a drip chamber of the infusion unit. The flow sensor provides an output pulse to the microprocessor in response to a drop of fluid in the drip chamber interrupting a light path extending from an array of light emitting diodes and a photo transistor. The light emitting diodes are pulsed between energized and non-energized states so that changes in the ambient light level do not adversely effect the sensed drop rate.

REFERENCES:
patent: 3655095 (1972-04-01), Kienitz
patent: 4094318 (1978-06-01), Burke et al.
patent: 4372304 (1983-02-01), Avakian
patent: 4504263 (1985-03-01), Steuer et al.
patent: 4509943 (1985-04-01), Hanzawa
patent: 4570639 (1986-02-01), Miodounik

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