Flow control system
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United States of America Patent
Stats
-
Jul 21, 1987
Grant Date -
N/A
app pub date -
Apr 26, 1985
filing date -
Apr 26, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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