Per-operational autotransfusion suction device
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United States of America Patent
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Nov 5, 1996
Grant Date -
N/A
app pub date -
Jul 5, 1994
filing date -
May 13, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A per-operational autotransfusion suction device has a suction cannular 1 with a tabular section nozzle 5, communicating with an inner passage 6, 9 in the cannula, the cannula passage being connected to a blood collecting recipient 41 in which a partial vacuum can be created by a vacuum source, the cannula passage communicating with an anticoagulant supply circuit having an anticoagulant feed control valve 15. The device has an independent vacuum circuit for sucking in only air and is connected to the vacuum source 40, to the blood collection recipient and to the valve. The valve has a vacuum chamber connected to a vacuum circuit 13, the vacuum chamber 49 having a deformable wall connected to a stopper which can close the anticoagulant feed circuit, the stopper being biased towards a closed position by a spring and capable of being biased towards an open position by deformation of the deformable wall when the pressure in the vacuum chamber is sufficiently low. The vacuum circuit communicates with an air vent 14 which can be shut off manually.
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