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US 5,112,292 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.
Claims3
A method of temporarily providing circulatory assistance to the heart of a patient, comprising the steps of:
- (a) positioning a pump carried by a catheter in the vascular system of a patient, said pump having intake port means at an intake end thereof, discharge port means at an opposite end thereof and a continuous rotating passage, said positioning step including inserting the intake port means of said pump into the heart of the patient and the discharge port means in the vascular system of the patient downstream of the heart.
- (b) creating a pressure differential in the pump for maximizing blood flow through the pump at a physiological pressure level;
- and
- (c) pumping blood from the intake port means to the discharge port means through the continuous rotating passage within the pump transforming mass displacement at the intake port means into transformational blood flow at the discharge port means.
1 more element
Dependencies are inferred from the claim text.