Measuring and testing – Volume or rate of flow – Using differential pressure
Patent
1996-07-24
1998-11-17
Dombroske, George M.
Measuring and testing
Volume or rate of flow
Using differential pressure
604 4, A61M 3700
Patent
active
058379053
ABSTRACT:
A system and method for delivery of cardioplegic solution to the heart of a patient incorporates novel venturi flow cells individually adapted for insertion in the blood and crystalloid solution lines together with transducers for measuring a pressure drop across each venturi flow cell and transmitting it to a microprocessor to calculate flow rate for display on a monitor. The novel self-venting and self-priming transducers and venturi flow cells are incorporated in a disposable cassette. The transducers in the disposable cassette are removably snap connected to a hand set or plug housing which communicates with the computer or microprocessor and monitor. A novel variable ratio valve permits infinitely variable ratios of blood and crystalloid solution.
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Galt Kenneth M.
Strauss Brian
White George W.
Amrozowicz Paul D.
Bethel George F.
Bethel Patience K.
Dombroske George M.
Gish Biomedical Inc.
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