High-capacity intravascular blood pump utilizing percutaneous access
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United States of America Patent
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-
Dec 2, 1986
Grant Date -
N/A
app pub date -
Sep 28, 1983
filing date -
Sep 28, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Full-flow cardiac assist is provided for cardiogenic shock patients without major surgery by a miniature axial-flow pump which can be inserted into the heart through the femoral artery and driven via a flexible cable from an external power source. The cable is contained within the catheter attached to the pump. The catheter also provides a conduit to supply the pump bearings with a blood-compatible purge fluid at a rate and pressure sufficient to prevent thrombus formation and introduction of blood elements between rotating and stationary elements of the pump. Due to the very small diameter of the pump, rotational speeds on the order of 10,000 to 20,000 rpm can be used to produce a blood flow on the order of about four liters per minute without significant hemolysis.
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