| 摘要 |
<p>This invention is a blood pump (20) comprising a pump mechanism (24) having an outer sleeve (32), an inner sleeve (38), and an impeller (not shown). The pump mechanism (24) is movable between a closed, preferably retracted position (not shown) wherein one or both of an inlet port (34), an outlet port (48) are sealed by the inner, and/or outer sleeve (38, 32) for inserting the pump mechanism (24) into the heart. An open, preferably extended position (shown) wherein the inlet, and outlet ports (34, 48) are open to allow the impeller to pump blood through the ports. The pump mechanism (24) preferably retracts so that it has less length, and is more readily maneuvered when it is in its closed position (not shown). Also disclosed are a bearing portion (not shown) within a cap of the impeller (not shown) with a flow of lubricating liquid between the bearing portion, a cap (not shown), and a method of using the pump (20).</p> |
