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| Number | Title | Issue Date |
| 7988728 | Physiological demand responsive control system A demand responsive physiological control system for use with a rotary blood pump; said system including a pump controller which is capable of controlling pump speed of said pump; said system further including a physiological controller, and wherein said physiologic... | 08/02/2011 |
| 7819916 | Blood pump system for artificial heart and apparatus supervisory system A blood pump system for an artificial heart including: a control unit for controlling a blood pump, the control unit including a first alarm generating part for generating a first alarm signal according to the state of the blood pump, and a speaker for outputting an... | 10/26/2010 |
| 7303581 | Artificial heart using magnetohydrodynamic propulsionh An implantable artificial heart apparatus which has no moving parts. It employs the technology of magnetohydrodynamics (MHD) to induce flow of human blood. An MHD propulsion unit is a device which applies magnetic and electric fields to blood to propel the conductiv... | 12/04/2007 |
| 7239098 | Digital adaptive sensorless commutational drive controller for a brushless DC motor Various embodiments of an electrical motor, a brushless DC motor controller, and applications thereof. In one embodiment, a fluid-moving device is provided with a brushless DC motor and a motor controller. The controller may include a set of comparators and a clocke... | 07/03/2007 |
| 7229474 | Method for controlling the position of a permanent magnetically supported rotating component Since disruptive forces can be continuously exerted upon a rotor during a pulsatile flow through a pump with a magnetically mounted rotor (permanent magnets and addition control current coils), it is necessary to adjust position i.e. modify axial rotor position very... | 06/12/2007 |
| 7175588 | Method and system for detecting ventricular collapse A pump system includes an implantable pump including a motor having a rotor and a stator. The stator includes a plurality of stator windings, and a motor controller is coupled to the motor to energize the windings so as cause the rotor to turn. A time-based system p... | 02/13/2007 |
| 7169109 | Methods and apparatus for controlling heart assist devices An apparatus for a heart assist device, comprising a processing unit for computing the blood flow rate from the arterial pressure curve and for predicting at every heartbeat the closing time of the heart valve from the curve of the blood flow rate. The processing un... | 01/30/2007 |
| 7065409 | Device communications of an implantable medical device and an external system An implantable medical device, external unit, and method for establishing communication between them are disclosed. The external unit learns the frequencies of transmission and reception for the implant. The transmit frequency of the implant is learned by the extern... | 06/20/2006 |
| 6991595 | Adaptive speed control for blood pump A blood pump may be adapted to sense the onset of left ventricular collapse by monitoring a pulsatility index, and may adjust the pump speed to maintain the index at a setpoint. The pulsatility index may be measured by the amount of difference between the maximum an... | 01/31/2006 |
| 6949066 | Rotary blood pump diagnostics and cardiac output controller A method and apparatus for controlling a ventricular assist device are disclosed. The method includes the step of providing a ventricular assist device which can be defined in terms of operational parameters such as pump speed or current. Measuring at least one phys... | 09/27/2005 |
| 6669624 | Temporary heart-assist system A balloon is positionable in the patient's descending aorta. The balloon includes a balloon catheter and two pressure sensors that electrically couple to an extra-corporeal controller. The balloon itself also couples pneumatically to the extra-corporeal c... | 12/30/2003 |
| 6623420 | Physiological heart pump control A blood pump is joined in parallel flow between the left ventricle and aorta of a patient's heart. The pump includes an inlet pressure sensor and cooperating controller for measuring inlet pressure to the pump to control operation thereof. The controller ... | 09/23/2003 |
| 6540658 | Left-right flow control algorithm in a two chamber cardiac prosthesis A biventricular cardiac prosthesis has a flow balance control system to balance blood flow through the left and right sides of the prosthesis to maintain a patient's left atrial pressure within physiologic bounds. The prosthesis can be configured to have ... | 04/01/2003 |
| 6511413 | Single cannula ventricular-assist method and apparatus A system for assisting the failing ventricle, which utilizes a single blood displacement chamber and a single cannula. The cannula is inserted into the failing ventricle cavity and is connected to a blood displacement actuator. The device produces blood d... | 01/28/2003 |
| 6494825 | System for stress relieving the heart muscle and for controlling heart function An apparatus and method for relieving stress on a heart muscle tissue in a wall of a heart having a chamber. A plurality of biocompatible and implantable elongate strips are configured to be connected to the heart wall and disposed about the chamber such ... | 12/17/2002 |
| 6458164 | Artificial heart with energy recovery An apparatus for use in an artificial heart assembly includes an internal coil adapted to be implanted beneath the skin of a subject and an external coil coupled to transmit electric power to the internal coil through the skin of the subject. The apparatu... | 10/01/2002 |
| 6443884 | Ventricular assist device capable of promoting recovery of cardiac function A ventricular assist device 10 includes a blood conduit 14, which carries the blood ejected from the ventricle to the ventricular assist device, a one-way valve 22, which is provided in the blood conduit and can open only toward the ventricular assist dev... | 09/03/2002 |
| 6443983 | Centrifugal blood pump apparatus A centrifugal impeller-type pump for transporting blood has a new and improved design in the impeller, to allow for the elimination of stagnant flow areas, and a geometrical design that minimizes damage to the blood components. A system for controlling an... | 09/03/2002 |
| 6422990 | Blood pump flow rate control method and apparatus utilizing multiple sensors A flow rate control method and apparatus for a blood pump is provided wherein multiple sensors are utilized to measure physical dimensions of a ventricle to calculate either a cross sectional area or a volume of the ventricle during distention and contrac... | 07/23/2002 |
| 6395027 | Artificial heart with arrhythmia signalling An artificial heart assembly may be provided with a blood inlet conduit adapted to be implanted within a subject, a blood outlet conduit adapted to be implanted within the subject, a pumping mechanism implanted within the subject that pumps blood from the... | 05/28/2002 |
| 6363276 | Magnetically suspended fluid pump and control system with defibrillator A blood pump for assisting a heart is provided having a stator and a rotor. The rotor is magnetically radially supported creating a suspension gap between the stator and the rotor. The rotor can be supported axially by a Lorentz force bearing and can be m... | 03/26/2002 |
| 6293901 | Magnetically suspended fluid pump and control system A blood pump for assisting a heart is provided by a stator and a rotor. The rotor is magnetically supported creating a suspension gap between the stator and the rotor. The rotor can be supported axially by a Lorentz force bearing and can be magnetically r... | 09/25/2001 |
| 6168624 | Apparatus and methods for revascularization and perfusion The invention is practiced by introducing a catheter (10)into the left ventricle of the heart. Deployment of an intraventricular pump assembly (12) from the end of catheter (10) is carried out by pushing holding device (24) in direction of the arrow (26).... | 01/02/2001 |
| 6110098 | System and method of mechanical treatment of cardiac fibrillation There is provided an implanted system and method for delivering subsonic mechanical waves to one or more selected patient areas, the areas including the patient's heart and/or lungs. The mechanical waves are delivered for the purpose of treating fibrillat... | 08/29/2000 |
| 6106551 | Communication method for implantable medical device A medical assembly, such as an artificial heart assembly, adapted to be implanted within a living subject is composed of an implantable data communications interface adapted to receive an encoded data signal from a data communications interface located ou... | 08/22/2000 |
| 5980571 | Substitute-heart control apparatus A substitute-heart control apparatus for controlling a substitute heart provided in a living body, including an information obtaining device which non-invasively obtains, from the living body, physical information relating to blood circulation in the livi... | 11/09/1999 |
| 5888242 | Speed control system for implanted blood pumps An automatic speed control system continually adjusts the speed of an implanted cardiac assist blood pump to an optimum level for the varying physiological needs of the patient. It does this by periodically iteratively incrementing the speed setpoint of t... | 03/30/1999 |
| 5674281 | Artificial heart braking system An artificial heart assembly, designed for implantation into a subject, which may be a total artificial heart or a ventricular assist device. The heart assembly has a blood inlet conduit, a blood outlet conduit, a pumping mechanism for pumping blood from ... | 10/07/1997 |
| 5569156 | Electrohydraulic ventricular assist device The invention is directed to a unified system for an electrohydraulic ventricular assist device adapted for implantation in the thorax and for cannulation to the blood circulatory system comprising an internal electronic controller for generating an actua... | 10/29/1996 |
| 5562596 | Method and apparatus for controlling the flow of a medium A quantification of approximate entropy is determined on a set of data by comparing subsets of the data. The comparison reveals the regularity and stability of similar patterns amongst subsets of the data. The comparisons perform such that the contributio... | 10/08/1996 |
| 5537335 | Fluid delivery apparatus and associated method A fluid delivery apparatus including a chamber for holding a conduit, such as a portion of a human vascular tissue, a fluid supply source for delivering a fluid into the conduit and a fluid pressure modulating device for modulating the fluid pressure supp... | 07/16/1996 |
| 5352180 | Method and apparatus for regulating the flow rate of a periodic flow heart prosthesis The invention relates to a method and apparatus enabling the blood flow rate conveyed by a heart prosthesis drive by an electrical actuator (18) to be adapted to the flow rate available in the patient's venous return. An apparatus includes a sensor (11) f... | 10/04/1994 |
| 5232434 | Fluid feeding pump unit A pump unit for assisting in the blood feeding operation of a heart includes a pair of pumps 7a, 7b connected in parallel with each other. When the pump 7a (or 7b) has reached its expanded position and the pump 7b (or 7a) has reached its contracted positi... | 08/03/1993 |
| 5108360 | Monitoring system for medical pump A monitoring system for a medical pump having a reversible operating body for compressing/expanding a space for accommodating a fluid, suction/ejection ports communicating via a no-return valve with this space and units for driving the reversible operatin... | 04/28/1992 |
| 5100374 | Apparatus for driving blood pump An apparatus for driving a blood pump such as an artificial heart. The apparatus comprises a first pressure pulse generator, a second pressure pulse generator, a pressure detector for detecting the pressure produced by the first pressure pulse generator, ... | 03/31/1992 |
| 5064353 | Pressure responsive linear motor driven pump Pumping apparatus which compresses or decompresses an actuating fluid alternately, which is in turn used to pump an artificial heart. To reduce the size of the apparatus, a diaphragm which contains a non-compressible actuating liquid is driven reciprocati... | 11/12/1991 |
| 5030197 | Apparatus for driving blood pump An apparatus for driving a blood pump such as an artificial pump. The apparatus comprises a pressure pulse generator for producing pressure pulses, a pressure detector for detecting the pressure produced by the pressure pulse generator, and an electrical ... | 07/09/1991 |
| 4974774 | Medical appliance driving apparatus A medical appliance driving apparatus includes positive and negative pressure sources and an isolator having an input chamber and an output chamber which are defined by a movable membrane. A first switching valve is connected to the positive pressure sour... | 12/04/1990 |
| 4827906 | Apparatus and method for activating a pump in response to optical signals from a pacemaker A method and apparatus for activating a pulsatile heart-lung bypass pump, intra-aortic balloon pump or the like on a patient whose heart is externally paced by a pacemaker of the type having a surface with an optical indicating device which emits optical ... | 05/09/1989 |
| 4787368 | Medical device driving system A system for driving a medical device includes a positive pressure source; a first electromagnetic valve connected with the positive pressure source; an negative pressure source; a second electromagnetic valve connected with the negative pressure source; ... | 11/29/1988 |
