Method and apparatus for detection of occlusions
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United States of America Patent
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Mar 26, 2002
Grant Date -
N/A
app pub date -
Oct 28, 1999
filing date -
Oct 29, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method and apparatus for automatically detecting an occlusion or drive system failure in a medication infusion system is provided. The electrical current to an infusion pump is measured and compared against a baseline average current. If the current exceeds a threshold amount, an alarm is triggered. Alternatively, pump motor encoder pulses are measured during a pump cycle. If the number of pulses do not correspond within a normal range, an alarm is triggered. After any alarm is triggered, the pump motor is driven in reverse for an incremental distance in order to relieve the fluid pressure in the system.
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