Autotransfusion membrane system with means for providing reverse filtration
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United States of America Patent
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Jun 1, 1993
Issued Date -
N/A
app pub date -
Jul 16, 1991
filing date -
Mar 7, 1990
priority date (Note) -
Expired
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Abstract
An apparatus for recycling autologous blood from a patient for reinfusion back to the patient comprising suction means, means for admixing aspirated blood with a washing fluid, filtering means for filtering the admixture through an emboli filter, monitoring means for measuring the blood component levels or hematocrit in the filtered blood, filtration means for removing excess fluid and particulates from the blood, and reinfusion means is disclosed. The apparatus operates in three different modes--idling, filtration and reinfusion--in response to specified conditions. Embodiments for use during surgery for on-line purification and reinfusion on a real time basis are disclosed along with embodiments for use postsurgically when the wound site is closed. Means for performing reverse filtration in the membrane filter are also included for maintaining a consistent level of filtration through the membrane filter.
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