Monitor for intravenous injection system for detecting occlusion and/or infiltration
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United States of America Patent
Stats
-
Jul 23, 1985
Grant Date -
N/A
app pub date -
Jun 13, 1983
filing date -
Jun 13, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A monitor is described for use with an intravenous injection system of the type that includes an accumulator (18) located between the pump (14) and the needle (28) that connects to the patient's vein. The monitor generates an alarm when there is infiltration (no resistance to outflow, as when the needle withdraws from a vein) or occlusion (the needle is blocked). The monitor includes a pressure sensor (32) coupled to the accumulator, and a circuit (34) which responds to the rate of change of the pressure to operate an alarm when the rate of change exceeds a predetermined amount such as 5 mm Hg, but only when it exceeds that value over a particular time period such as 10 seconds or one minute.
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