Infusion pump with occlusion sensitive shutoff
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United States of America Patent
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Sep 14, 1993
Grant Date -
N/A
app pub date -
Aug 14, 1991
filing date -
Mar 10, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An infusion pump, suitable for medical applications, has a movable carriage which is arranged gradually to depress the plunger of a syringe. The carriage moves along a fixed rod at a rate determined by the rotation of a lead screw. Any excess pressure in the infusion line produces a back-pressure on the plunger which causes an axial force to be exerted on the carriage and thus on the lead screw. When this force exceeds a predetermined value, indicative of an occlusion of he infusion line, the lead screw will move axially so compressing a spring and causing a clutch to become decoupled, causing infusion to cease and an alarm to sound.
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