Matches 51 - 100 out of 171 < 1 2 3 4 >
Match Document Document Title
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...
6511412 Cardivascular support control system  
An apparatus for assisting cardiac function of a patient includes an inflatable chamber operably positionable with respect to an aorta of the patient, a percutaneous access device implantable with...
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...
6506146 Apparatus for supporting heart performance  
In a means for support of the performance of a heart ( 1 ) in which fluid is taken from blood vessels via an external pump ( 7 ) and is returned to the blood vessels, the amount of fluid being...
6468041 Magnetically levitated apparatus  
There is provided a magnetically levitated apparatus wherein an impeller has one side supported by an electromagnet and the other side supported and magnetically levitated by an attractive force...
6461351 Energy delivery system and method for performing myocardial revascularization  
An energy delivery system for performing myocardial revascularization on a heart of a patient including an energy pulse source that produces energy pulses sufficient to create channels in a wall of...
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...
6458323 Method and device for the vascular pressure-controlled selective perfusion of fluids through blood vessels  
A method for selective perfusion of fluids through blood vessels is controlled by the pressure in the blood vessels. A tubing line open at the proximal end for the perfusion of fluids through a...
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...
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...
6440059 Magnetohydrodynamic cardiac assist device  
A left ventricular assist device (LVAD) utilizing MHD principles, wherein an aortic electrode assembly is located within a main femoral artery in the aorta, in the vicinity of the heart of a...
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...
6406422 Ventricular-assist method and apparatus  
A system for ventricular-assist of the normal heart action utilizes an intraventricular device with a limited volume which is expanded at a critical time, for a critical duration and with a volume...
6406421 System and method of determining skeletal muscle contraction by serial lead impedance measurements  
There is provided a system and method for continually monitoring the occurrence of contraction during stimulation of skeletal muscle which is employed in a cardiac assist-type system. During...
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...
6375607 Magnetically suspended fluid pump and control system  
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...
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...
6251061 Cardiac assist device using field controlled fluid  
A cardiac assist device and method of use for assisting the function of a heart. The assist device includes a compressor positioned against the epicardial wall of the heart and a field generator...
6241652 Fluid circulator for nonlinear compliant circuits  
Flow in nonlinearly compliant leaky fluid circuits is controlled by alteration of control variables in fluid pathways external to the leaky circuits. In analogous practical applications, blood flow...
6221104 Anterior and interior segment cardiac restoration apparatus and method  
The symptoms of congenital heart failure are addressed in this surgical procedure for mounting a patch in the ventricle of the heart to reduce ventricular volume. Placement of the patch is...
6176848 Intravascular blood pump  
A blood pump having a motor housing and a pump housing which are rigidly connected to one another in an axially spaced relationship. Both housings are of substantially the same diameter and are...
6176822 Intracardiac blood pump  
A blood pump comprises a drive portion (11) and a pump portion (12) prolongated by a flexible hose (13). Pressure sensors (60, 61) determine the differential pressure between the inlet side and the...
6129660 Method of controlling blood pump  
When a current is set, a PI control portion performs proportional integration control, a power amplifying circuit performs power amplification, whereby a current flowing through a motor is...
6127410 Compositions, apparatus and methods for facilitating surgical procedures  
Methods are provided for conducting surgical procedures in a patient wherein, during the surgical procedure, autonomous ventricular electrical conductivity and escape beats are reversibly and...
6123724 Heart assist method and apparatus employing magnetic repulsion force  
A heart is artificially contracted to pump blood an artificial device that employs electromagnetic force. That device includes electromagnetic coils attached to ribs of the animal and permanent...
6123726 Portable drive system for artificial heart  
A portable drive system for an artificial heart can be provided that includes a blood pump 1 having a blood seal for sealing a rotation shaft 13, a system drive section 45 including a purge...
6120431 Method for assisting stystolic and diastolic cardiac function  
The present invention pertains to an apparatus for assisting a patient's heart operation. The apparatus comprises a mechanism for expanding and collapsing a right ventricle free wall of a heart of...
6099460 Electromagnetic heart assist technique and apparatus  
A heart can be artificially contracted to pump blood by separate electromagnets to the exterior surface of the heart and implanting another electromagnet inside a heart chamber. Electric currents...
6066085 Single chamber blood pump  
A blood pump apparatus can include a pump housing having a drive chamber containing a drive mechanism. A cupped member can be connected to the housing and the drive mechanism can include a motor...
6066086 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...
6008625 Use of double cells to power an implantable medical device  
A power source including two alkali metal/transition metal oxide cells discharged in parallel to power an implantable medical device is described. The first cell powers the medical device in both a...
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,...
5964694 Method and apparatus for cardiac blood flow assistance  
An intravascular microaxial pump has an integrated configuration that enables both the drive unit as well as the pumping segment to be advanced through a patient's vasculature. The device includes...
5891012 Coronary artery counterpulsation device and method  
A device and method are shown for improving coronary blood circulation and cardiac contractile function, synchronizing coronary perfusion pressure with the patient's cardiac cycle, by alternately...
5848962 Device for assisting cardiac function  
Disclosed is a device for assisting cardiac function having the following atures: at least one half-shell is provided, the interior and exterior contours of which are designed in such a manner...
5813972 Medical perfusion system with data communications network  
A medical perfusion system for use in connection with the medical treatment of a patient is provided with a first type of perfusion device in the form of a blood pump adapted to pump blood through...
5807234 Myostimulator control using metabolic demand and muscle performance  
In a cardiomyoplasty system, a rate responsive implantable device is disclosed which controls the stimulation of both the heart and a myoplasty muscle. The metabolic demand is used as a rate...
5713954 Extra cardiac ventricular assist device  
An artificial implantable heart assist system with an artificial myocardium employs a number of flexible, non-distensible tubes with the walls along their long axes connected in series to form a...
5707336 Ventricular assist device  
Cardiac ventricular assist apparatus adapted to be placed by insertion through an incision in the wall of the upper abdomen below the rib cage and an incision in the inferior aspect of the...
5697884 Cardiac assist device having circadian muscle simulation  
A cardiac assist device having circadian muscle stimulation. In particular the present invention operates in one of two states, either day mode or night mode. During the day mode, muscle...
5607385 Device and algorithm for a combined cardiomyostimulator and a cardiac pacer-carioverter-defibrillator  
A device and algorithm for a combined cardiomyostimulator and a cardiac pacer-cardioverter-defibrillator. In particular the present device operates, in a first embodiment, to deliver stimulation to...
5571176 Partially autogenous four chambered heart  
An autogenous heart having a physiology similar to a native heart is formed from two muscle segments which are wrapped about a mold and divided to form four chambers. To form this heart, two...
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...
5562595 Multiple therapy cardiac assist device having battery voltage safety monitor  
A cardiac assist system which provides simultaneous cardiac assistance during a confirmed cardiac arrythmia, but which provides for the inhibition of the cardiac assistance in the event battery...
5503615 Implantable cardiac ventricular assist device and controller thereof  
An implantable ventricular assist device is described which has only one moving part. This part consists of a conical rotor with vanes which spiral upward from the base in a direction opposite to...
5500004 Cardio myostimulation system with defibrillation  
A pacemaker system for a heart having an external muscle is used to control pacing of the heart during normal or even arrhythmic modes. In these modes, the muscle is stimulated synchronously with...
5431653 Knee joint flexion-gap distraction device  
A knee distraction device is provided for use in knee arthroplasty. A mechanism applies an adjustable distraction force between the tibial surface and a point on the distal femur of the flexed...
5383840 Biocompatible ventricular assist and arrhythmia control device including cardiac compression band-stay-pad assembly  
A ventricular assist device for a heart includes a compression band-stay-pad assembly for encircling substantially the entire heart perimeter and comprising an elongated band member or chain...
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...
5328442 System and method for stimulating a heart having undergone cardiac myoplasty using a single-chamber pacemaker  
A bifurcated lead adapter or lead used with an implantable stimulation device, such as a pacemaker, forms part of a stimulation system and method that senses depolarization of the ventricular...
Matches 51 - 100 out of 171 < 1 2 3 4 >