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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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6254525 |
Cardiac assist system and method thereof
A cardiac assist system includes a sensor that is operative to sense the electrical activity of a patient's heart. The sensed electrical activity is processed to determine the onset of ventricular...
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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...
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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...
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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...
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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,...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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4775887 |
Observation apparatus for artificial organs
An observation apparatus for an artificial organ such as an artificial heart includes a first casing having the artificial heart and a video signal generating and transmitting apparatus therein and...
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4662358 |
Electronic control system for a cardiac prosthesis
An electronic control system for controlling the operation of a cardiac prosthesis is disclosed. The cardiac prosthesis includes dominant and subordinate ventricles which receive blood in response...
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4662355 |
Pump regulation device
The invention provides a pump regulation device. It is characterized in that the device (21) comprises: means for recording the real pressure (24) and a reference pressure, means, on the one hand...
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4588404 |
Total cardiac prosthesis
The invention prosthesis is formed by a biventricular monoblock unit which comprises a sealed case implantable in the pericardial cavity. The actuating device is formed by two membranes working...
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4583525 |
Artificial heart driving apparatus
Positive pressure and negative pressure are alternately applied to artificial hearts so as to drive the same. Each of driving systems includes a pressure sensor, and a solenoid valve connected...
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4559648 |
Safety control valve for an artificial heart
A safety drive for an artificial heart, if the right drive should fail it is simply put out of operation, while if the left drive fails, the right drive, which is still functioning, is switched...
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4547911 |
Implantable heart pump
A mechanical heart for implantation into the human body is run at a higher frequency which is a harmonic multiple of a normal heart beat frequency, and the pump chamber volume is reduced,...
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4519043 |
Solenoid activated closure device
A solenoid closure servo control eliminates impact of the solenoid poles against each other upon closure of the device. A model of the device closure is obtained from a parameter of initial gap....
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4516567 |
Sequential pneumatic control device, supplied with electric energy
The invention relates to a sequential pneumatic control device, supplied with electric energy, for a total cardiac prosthesis (4) formed by a biventricular monobloc assembly with pneumatic...
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4488099 |
Real time servo control apparatus and method
Real time servo control in a nonlinear, cyclical dynamic system adjusts the energy applied to a prime mover from a source of the energy as a linear function of an error between the measured load...
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4453537 |
Apparatus for powering a body implant device
An apparatus for powering a pressure actuated body implant device is disclosed. Preferably, the apparatus is utilized to power an artificial heart. The apparatus comprises a reservoir implantable...
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4231354 |
Pulsatile blood pumping apparatus and method
An intracorporeal, extracorporeal, cardiac assist, perfusion device or other pulsatile blood pumping system for circulating blood within living tissue under automatic control. Plural physiologic...
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4162543 |
Artificial heart
An artificial heart comprising at least one blood circulating pump having a transparent housing divided into two chambers by a diaphragm. One of the chambers is a hydraulic chamber having an inlet...
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4086653 |
Pneumatic pump monitor
A monitor for a pneumatically driven blood pump receives an input correlated to mechanical operation of the blood pump and electrically transforms the information to clinical information related to...
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3966358 |
Pump assembly
A pump assembly is disclosed which includes a pump which is externally controlled to vary with time the volume and/or the pressure of fluid pumped therethrough. A memory unit is programmed to...
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3783453 |
SELF-REGULATING ARTIFICIAL HEART
This invention describes a complete artificial heart system which is capable of providing complete self-regulative control of the pumping action of the heart. It comprises a right and left...
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3771173 |
ARTIFICIAL HEART
An artificial heart capable of acting as a substitute for a natural heart comprising a casing constructed of a material compatible with tissue of a living being and of a size to fit within the...
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3550162 |
BLOOD PUMP CONTROL SYSTEM
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3541612 |
FLUID ACTUATED AND REGULATED ARTIFICIAL IMPLANTABLE HEART SYSTEM
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3518702 |
IMPLANTABLE BODY ACTUATED ARTIFICIAL HEART SYSTEM
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3491377 |
SELF-TRIGGERING STANDBY VENTRICLE FOR HEART ASSIST
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3425064 |
TRANSDUCER FOR ARTIFICIAL HEART
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