Self-adaptive piston blood pump
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United States of America Patent
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Jul 2, 2013
Grant Date -
Mar 5, 2009
app pub date -
Aug 27, 2008
filing date -
Aug 27, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A self-adjusting fluid pump that includes a piston pump containing at least one piston with a pressure sensor. The fluid pump including at least one fluid-containing pump chamber within the piston pump, adjacent to said piston, wherein advancing the piston causes fluid flow from the pump chamber to a biological destination, and retracting the piston causes fluid to passively till the pump chamber. A microprocessor, senses piston pressure to calculate the rate of fluid input flow into the pump chamber for each pump cycle. If the output flow rate deviates from the input flow rate by a pre-specified value range, the microprocessor adjusts the piston pump to match the output flow rate with the input flow rate by increasing or decreasing stroke rate (piston velocity), stroke volume, or a combination of both.
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