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AIR DETECTION SYSTEM AND METHOD FOR DETECTING AIR IN A PUMP OF AN INFUSION SYSTEM

  • US 20130261993A1
  • Filed: 03/27/2013
  • Published: 10/03/2013
  • Est. Priority Date: 03/30/2012
  • Status: Active Grant
First Claim
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1. A method for detecting air in a chamber of an infusion system comprising:

  • moving, with an actuator device, a plunger against a chamber containing fluid;

    detecting, with a sensor, a force acting on the plunger as it moves against the chamber;

    electronically communicating a measurement of the force from the sensor to a processor; and

    determining, with the processor, that the chamber contains air when;

    (1) a trigger event occurs in which a change in the force exceeds a threshold; and

    (2) subsequent to the trigger event a differential between a baseline average force acting on the plunger and a current average force acting on the plunger exceeds an expected force differential within a defined delay range.

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