Methods and apparatus for measuring aspiration pressure at low aspiration volumes

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United States of America Patent

PATENT NO 9909945
SERIAL NO

14432983

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method adapted to allow aspiration verification of a liquid such as a biological liquid or liquid reagent at low aspiration volumes (e.g., less than 25 μL). The method includes attempting to aspirate a volume of a liquid into a probe at an aspiration frequency, measuring an aspiration pressure associated with the attempted aspiration of the liquid and providing a measured pressure signal, and filtering the measured pressure signal with a filter. The filter has a passband frequency containing the aspiration frequency and excluding the frequencies of a disturbance causing noise in the measured pressure signal. Apparatus for carrying out the method are provided, as are other aspects.

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Patent Owner(s)

  • SIEMENS HEALTHCARE DIAGNOSTICS INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dunfee, William D Newark, US 19 161

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