Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Corporeal artificial heart – heart assist – control... – Including electrical power generating means
Reexamination Certificate
2000-04-27
2003-07-15
Snow, Bruce (Department: 3738)
Prosthesis (i.e., artificial body members), parts thereof, or ai
Corporeal artificial heart, heart assist , control...
Including electrical power generating means
C600S016000, C417S017000, C318S523000
Reexamination Certificate
active
06592620
ABSTRACT:
FIELD OF THE INVENTION
The present invention concerns a novel power system for an implantable heart pump.
BACKGROUND OF THE INVENTION
A most important consideration with implanted artificial heart pumps and their associated control and power systems are reliability and safety. They must be capable of working properly for extended periods of time without replacement of implanted parts. All parts and systems as used must be biocompatible. They must be capable of use without impeding the proper circulation and functioning of blood through clotting or cell damage.
Also of great importance are quality of patient life considerations. The implanted pump and control and power system must be small and preferably without any wires or other structures protruding through the skin. The system must interfere with normal patient activities to the minimum extent possible. Therefore, the system should be capable of functioning for at least limited periods of time with untethered operation so that the patient may bathe comfortably and engage in other activities. Any external components must be easy and comfortable for the patient to use on his own.
One major consideration relates to redundancy in the power and control system. A certain amount of redundancy especially as to parts, such as batteries and motors, is essential in order that the system meet safety requirements. Therefore, systems that lack any redundancy are not considered acceptable. On the other hand, too much redundancy even including those components extremely unlikely to fail can add unnecessary size, complexity and cost to a system.
It is therefore an object of the present invention to provide a power and control system that is reliable and safe, without requiring unnecessary redundancy. The advantages of the present invention will become apparent as the description proceeds.
SUMMARY OF THE INVENTION
In accordance with the present invention, a novel implantable blood pump is provided. The pump includes a pump housing, a rotor mounted for rotation within the housing with the rotor having an elongated shaft portion and an impeller, and first and second stators for aiding in rotation of the impeller. A stator driver is provided for driving the stators. The pump also includes a microprocessor, and first and second batteries. The batteries, microprocessor and driver are interconnected and programmed so that during normal operation only one of the batteries is in use at a time for powering both stators simultaneously.
As used herein, a “battery” comprises a single sell or plurality of cells which are connected together to operate as a unit.
In the illustrative embodiment, the driver comprises two stator drivers. A multiplexer is provided for coupling the drivers to the stators in a desired manner, although it is preferred that only one driver be used during normal operation for driving both stators.
In the illustrative embodiment, the system includes an external transcutaneous energy transmission coil and an external power source. The system may also include an external monitor.
In one embodiment, the invention concerns a method for controlling the drive system for an electrical, implantable heart pump. It includes the steps of providing first and second batteries, a microprocessor, a transcutaneous energy transmission coil, a driver, and first and second stators, and using only one of the batteries at a time during normal operation of the system to power both stators simultaneously.
A more detailed explanation of the invention is provided in the following description and claims and is illustrated in the accompanying drawing.
REFERENCES:
patent: 3518997 (1970-07-01), Sessions
patent: 3620220 (1971-11-01), Murphy, Jr.
patent: 3738371 (1973-06-01), Raddi et al.
patent: 3757795 (1973-09-01), Anderson
patent: 3783877 (1974-01-01), Bowers
patent: 4102344 (1978-07-01), Conway et al.
patent: 4134408 (1979-01-01), Brownlee et al.
patent: 4173796 (1979-11-01), Jarvik
patent: 4346335 (1982-08-01), McInnis
patent: 4441210 (1984-04-01), Hochmair et al.
patent: 4957504 (1990-09-01), Chardack
patent: 5049134 (1991-09-01), Golding et al.
patent: 5129789 (1992-07-01), Thornton et al.
patent: 5290227 (1994-03-01), Pasque
patent: 5317220 (1994-05-01), Godkin
patent: 5358514 (1994-10-01), Schulman et al.
patent: 5405367 (1995-04-01), Schulman et al.
patent: 5613935 (1997-03-01), Jarvik
patent: 5676651 (1997-10-01), Larson, Jr. et al.
patent: 5697953 (1997-12-01), Kroll et al.
patent: 5722930 (1998-03-01), Larson, Jr. et al.
patent: 5769877 (1998-06-01), Barreras, Sr.
M. Arabia, et al. “A New Automatically Controlled Electric Tah”,Trans Am Soc Artif Intern Organs, vol. XXVI, pp. 60-65 (1980).
P. J. Miller et al. “In Vivo Evaluation of a Compact Implantable Left Ventricular Assist System (LVAS)”,Trans Am Soc Artif Intern Organs, vol. XXIX, pp. 551-555 (1983).
D.B. Gernes, et al. “Development of an Implantable, Integrated, Electrically Powered Ventricular Assist System”,Trans Am Soc Artif Intern Organs, vol. XXIX, pp. 546-550 (1983).
G. Rosenberg et al., “An Electric Motor-Driven Total Artificial Heart: Seven Months Survival in the Calf”,Trans Am Soc Artif Intern Organs, vol. XXV, pp. 69-71 (1984).
J. Moise et al., “Experimental Evaluation of Complete Electrically Powered Ventricular Assist System”,Trans Am Soc Artif Intern Organs, vol. XXXI, pp. 202-205 (1985).
Jal S. Jassawalla et al., “In Vitro and In Vivo Testing of a Totally Implantable Left Ventricular Assist System”,Trans Am Soc Artif Intern Organs, vol. XXXIV, pp. 470-475 (1988).
Narayanan Ramasamy et al, “Chronic Ovine Evaluation of a Totally Implantable Electrical Left Ventricular Assist System”,Tran Am Soc Artif Intern Organs, vol. XXVV, pp. 402-404.
William J. Weiss et al., “In Vivo Performance of a Transcutaneous Energy Transmission System with the Penn State Motor Drive Ventricular Assist Device”,Trans Am Soc Artif Intern Organs, vol. XXXV, pp. 284-288.
Tofy Mussivand, et al., “In Vitro and In Vivo Performance Evaluation of a Totally Implantable Electrohydraulic Left Ventricular Assist System”,Trans Am Soc Artif Intern Organs, vol. XXXV, pp. 433-435.
Innovative Ventricular Assist System (IVAS), RFP NHLBI-HV-94-25, pp. 47-53 (1994).
Innovative Ventricular Assist System (IVAS), RFP NHLBI-HV-94-25, pp. 23-24 (1994).
Gauthier Raymond G.
Lancisi David M.
Wampler Richard K.
Gerstman George H.
Kriton Medical, Inc.
Shaw Seyfarth
Snow Bruce
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