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US 5,112,349 AGranted
Heart assist pump
AssigneeAmerican BioMed, Inc.
InventorsDavid P. Summers, Jeddy D. Nixon
Life of this patent
Estimating the term…
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 the moineau pumping principal to pump blood at a rate of approximately three to four liters per minute through the circulatory system of the patient.
Claims4
A temporary circulatory assist pump, comprising:
- (a) an elongate, cylindrical biocompatible pump having at least one intake port and at least one discharge port, said pump being sized for passage through a human blood vessel and insertion into a heart;
- (b) said pump comprising a stator and a rotor whereby orbiting motion of the rotor moves a seal continuously through the stator for pumping of blood therethrough;
- (c) wherein said pump includes a discharge nozzle supported in line with said stator, said discharge nozzle including a restriction for pressurizing and jetting blood pumped therethrough;
- (d) wherein said pump further includes a venturi tube located in line with said discharge nozzle for forming a negative pressure area within said pump;
- (e) extravascular power means connected to said pump for driving said rotor;
- and
- (f) drive shaft means connecting said pump to said power means, said drive shaft means being connected to said rotor by a flexible joint, said flexible joint permitting flexure deformation thereby enabling said rotor to move through an orbital path upon rotation of said rotor by said power means.
4 more elements
Dependencies are inferred from the claim text.