Method and apparatus for determining pressure and detecting occlusions in a syringe pump
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United States of America Patent
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Sep 7, 1993
Grant Date -
N/A
app pub date -
Sep 23, 1992
filing date -
Sep 23, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A syringe pump is disclosed in which the pressure in the syringe is monitored. The syringe pump includes a force detector which detects the force on the plunger of the syringe. The force on the plunger of the syringe is converted into a force by means of an algorithm which is independent of the cross-sectional area of the syringe. The algorithm calculates the pressure by subtracting a predetermined frictional force from the measurement force and multiplying the result by a calibration pressure divided by the difference between a calibration force and the predetermined frictional force.
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