MEANS FOR USING SINGLE FORCE SENSOR TO SUPPLY ALL NECESSARY INFORMATION FOR DETERMINATION OF STATUS OF MEDICAL PUMP
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United States of America Patent
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Issued Date -
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app pub date -
Jun 27, 2008
filing date -
Oct 16, 2002
priority date (Note) -
Abandoned
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Abstract
A medical pump, for use with a cassette having a pumping chamber, includes a pumping element with a piston slider assembly which intermittently pressurizes the pumping chamber during a pumping cycle and has a piston head connected to a main body with a single pressure sensor positioned there between. A camshaft is associated with the pumping element, an inlet control element, and an outlet control element for closing the pumping chamber to flow when the pumping chamber is pressurized. A processing unit receives pressure and position data from the pressure sensor and a position sensor associated with the pumping element, and processes this data to determine the operating condition of the pump. The operating conditions determined include: blocked fluid flow, no fluid in the line, no cassette associated with the pump, proper pump priming, or proper valve sealing.
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