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US 4,969,865 AGranted
Helifoil pump
AssigneeAmerican BioMed, Inc.
InventorsNed H. C. Hwang, David P. Summers
Life of this patent
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Abstract
A temporary circulatory assist pump is disclosed for implantation in the heart of a patient through the femoral artery. The pump is driven by a flexible drive shaft extending through a catheter and being connected to a power source outside the body of the patient. The pump utilizes a helical-shaped foil impeller to pump blood at a rate of approximately three to four liters per minute through the circulatory system of the patient.
Claims7
A temporary circulatory assist pump, comprising:
- (a) an elongate, cylindrical housing means having at least one intake port and at least one discharge port, said housing means for passage through a human blood vessel and insertion into a heart;
- (b) a single helically-shaped foil impeller having a leading edge, a trailing edge and an axis extending therebetween, said impeller being co-axially positioned within said housing means and cooperating with said housing means to form a pump for assisting the heart of a patient to pump blood;
- (c) extravascular power means connected to said pump for driving said impeller;
- and
- (d) drive shaft means connecting said pump to said power means.
2 more elements
Dependencies are inferred from the claim text.