Cardiopulmonary bypass system using vacuum assisted venous drainage
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United States of America Patent
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Nov 13, 2001
Grant Date -
N/A
app pub date -
Aug 15, 1997
filing date -
Aug 15, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
A cardiopulmonary by-pass system having a vacuum assisted venous drainage system including a hard-shelled venous reservoir which is closed to atmosphere. The reservoir having a blood inlet for supplying blood removed under negative pressure during operation of the cardiopulmonary by-pass system to the reservoir, a blood outlet for removing blood from the reservoir, and a vacuum inlet for supplying a vacuum to the reservoir. A vacuum supply is also included for providing a predetermined desired vacuum of approximately -70 to -25 mmHG from a house wall vacuum source to the venous reservoir via the vacuum inlet. A patient support unit is also provided for receiving blood from the reservoir blood outlet, treating and returning revitalized removed blood under positive pressure. A vacuum regulator subassembly is also provided for manually setting the predetermined desired vacuum. A valve subassembly is further provided for manually enabling and disabling a vacuum from being supplied to the reservoir. The valve subassembly additionally includes a check valve for automatically disabling a vacuum from being supplied to said reservoir.
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