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5405383 Articulated heart pump and method of use  
An articulated, intravascular pump having multiple pump sections linked together for relative motion and driven by a common drive cable is disclosed. Each pump section is relatively short, so that...
5399145 Blood pump  
A novel cardiac assist blood pump is disclosed. The blood pump comprises a pump chamber, a pressurizing chamber provided adjacent to the pump chamber, a rotor chamber provided adjacent to the...
5397349 Muscle and air powered LVAD  
A method for providing ventricular assist to a patient with a weak or nonfunctional heart includes attaching an artificial ventricle to a patient and pumping said artificial ventricle with a...
5385548 Balloon catheter for retrograde perfusion  
A catheter for retrograde perfusion of the heart through the coronary sinus, which has an infusion lumen for introducing perfusion liquid into the heart, a self inflating balloon, and a channeled...
5385581 Magnetically suspended and rotated rotor  
The impellor of a blood pump is supported by permanent magnets on the impellor and pump housing and stabilized by an electromagnet on the housing. A control circuit supplies current to the...
5383839 External plate valves for controlling blood flow through a shunt of a cardiopulmonary bypass pump  
External inlet and outlet pinch-type plate valves for controlling the blood flow through a compressible shunt of a cardiopulmonary bypass pump wherein the valves are not fixedly connected to the...
5372573 Blood flow  
A provision of improving the flow of blood through a region of increased impedance is disclosed. The provision comprises assisting blood flow is said region by means of a pump placed in or around...
5364337 Muscle powered cardiac assist system  
A method and apparatus for providing assistance to a patient's heart using a surgically prepared skeletal muscle. A skeletal muscle, such as the latissimus dorsi, is carefully separated from the...
5360445 Blood pump actuator  
An implantable blood pump actuator uses an efficient direct drive voice coil linear motor to power an hydraulic piston. The motor is immersed in oil and has but one moving part, a magnet which is...
5358519 Muscle control and monitoring system  
Apparatus and method for monitoring the performance of skeletal muscle used in a skeletal muscle powered cardiac assist system. The longest term monitoring is performed by an oxygen sensor which...
5350413 Transcutaneous energy transfer device  
An improved transcutaneous energy transfer (TET) device comprises a primary winding for placement on or near a skin surface, and a secondary winding for implantation under said skin surface. A...
5348528 Cardiac assist device  
Apparatus to assist a patient's heart. The apparatus includes a main pump to be mounted on the patient's chest wall. The pump is able to reciprocate to generate a compression stroke and an...
5346458 Electrohydraulic energy converter for cardiac assist devices and artificial hearts  
An apparatus for converting electric energy into pumping energy is disclosed. The apparatus is utilized to drive a cardiac assist device or an artificial heart. These devices are volume...
5344443 Heart pump  
A heart pump having a housing with a central longitudinal axis, inlet means and an outlet means is disclosed. A stationary shaft extends axially within the housing and the means are provided for...
5344386 Stimulation system for a skeletal muscle  
A stimulation system for a skeletal muscle in a patient having a heart tred with cardiomyoplasty, for use as a supplement to a conventional cardiac pacemaker circuit, includes a stimulation unit...
5332403 LVAD with t-shape and unidirectional valve  
A ventricular assist device comprises an artificial ventricle including a blood compartment, a pumping compartment and a pumping membrane separating the respective blood and pumping compartments....
5324323 Multiple channel cardiosynchronous myoplasty apparatus  
A neuromuscular stimulation apparatus and procedure, which employs multiple channels of stimulation for the purpose of supplying directional control of blood flow in addition to augmenting the...
5318501 Linear motion, muscle-actuated cardiac assist device  
A linear motion, muscle-actuated cardiac assist device novelly uses a powering muscle whose contractions and relaxations are made in a substantially linear fashion, as opposed to the curvilinear...
5314469 Artificial heart  
A cyclic action, electromechanically operated artificial heart having a pusher plate assembly disposed between a pair of bladders for alternately compressing one bladder containing blood directed...
5312341 Retaining apparatus and procedure for transseptal catheterization  
The invention comprises retaining apparatus for transseptal catheterization and a procedure for the use of same. The retaining apparatus is a selectively deployable retaining means disposed at or...
5300113 Cardiac ventricular assistance device particularly for compensating for weakened heart muscle function and for maintaining the vital body functions  
A single cardiac ventricular assistance device intended to integrate the ctions of a ventricular assistance device (V.A.D.) proper and of an aortic balloon pump (IABP) includes a single energy...
5300112 Articulated heart pump  
An articulated, intravascular pump having multiple pump sections linked together for relative motion and driven by a common drive cable is disclosed. Each pump section is relatively short, so that...
5290227 Method of implanting blood pump in ascending aorta or main pulmonary artery  
This invention relates to a method of surgically implanting a blood pump into the ascending aorta or pulmonary artery of a patient with a diseased or damaged heart ventricle. One preferred type of...
5287861 Coronary artery by-pass method and associated catheter  
A coronary-bypass method uses a collapsible stent made of a biocompatible material and having an inherent spring bias tending to form the stent into a substantially tubular opened configuration....
5282849 Ventricle assist device with volume displacement chamber  
A ventricle assist device for placement within a living body and including a self contained drive motor for generating pumping action with respect to a hydraulic pumping fluid. The ventricle...
5273518 Cardiac assist apparatus  
Regulators for improved cardiac assist systems of the type including skeletal muscle powered fluid pressure means, a cardiac cup and/or an aortic balloon pump. The regulators convert the positive...
5271746 Implantable blood pump with inextensible deformable closed bag  
The invention relates to an implantable blood pump of the type comprising a shell, a closed deformable bag, an inlet valve and an outlet valve, a drum arranged to roll over a wall of the bag, a...
5269811 Primary fluid actuated, secondary fluid propelling system  
A primary fluid actuated, secondary fluid propelling system, suitable for use, for example, as an implantable, artificial heart device, comprises a unidirectional pump for pumping...
5267940 Cardiovascular flow enhancer and method of operation  
An implanted cardiovascular assist pump is connected with the proximal descending thoracic aorta. The pump inlet is connected with the aorta at substantially the site of the first pressure/flow...
5263979 Artificial heart  
The invention is directed to an artificial heart having a pump, first and second pair of switching valves, and an electronic control unit which is arranged to control the valves to be actuated...
5256132 Cardiac assist envelope for endoscopic application  
A cardiac assist envelope for endoscopic application to permit the anatomic insertion of the envelope through an endoscopic cannula in which the body of the envelope is formed of a flexible but...
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...
5230692 Intra-aortic balloon pump  
An intra-aortic balloon pump of this invention comprises a catheter (4) which introduces a pumping media, a wrapped membrane (5) which is mounted on one end of the catheter (4), a protection...
5211659 Pump system suitable as a heart assist device  
Artificial heart type devices are made into practical heart assist devices by making the blood chambers of the device disposable or by adapting the blood chambers to accept disposable inserts. The...
5195518 System and method for enhancing collateral cardiac blood flow  
There is provided a system and method for enhancing collateral blood flow to the heart of a patient having angina with otherwise normal cardiac function. Skeletal muscle from the patient is...
5195942 Cardiac arrest treatment  
A method and apparatus are described for resuscitating a person who has suffered cardiac arrest. The method includes threading a balloon through the aorta until it lies along the ascending aorta,...
5193977 Flexible membrane sealless centrifugal pump  
Centrifugal pumps (10) are disclosed having nonrotatable membranes (21) to rotate fluid in a pumping chamber having at least a first open passage inlet (71) and an open passage outlet (91)....
5181518 Method of evaluating cardioprotective agents  
A bioassay and model is disclosed for screening experimental cardioprotective drugs and techniques, which employs small laboratory animal hearts in a model which mimics the pathophysiologic process.
5178515 Medical pump  
A medical pump comprises a casing having side walls, a peripheral wall, and a pump chamber defined thereby, an inlet port formed substantially in the central portion of one of the side walls of...
5176619 Heart-assist balloon pump with segmented ventricular balloon  
A heart-assist device which includes a flexible catheter carrying at least a ventricular balloon, such balloon corresponding in size and shape to the size and shape of the left ventricle in the...
5171207 Apparatus and method of use for pulsatile blood flow  
An apparatus and a method of use are disclosed which assist in pulsating blood to a patient during cardiopulmonary bypass surgery and assists in weaning a patient after cardiopulmonary bypass...
5169378 Intra-ventricular expansible assist pump  
An expansible assist pump for implantation through the femoral artery (left ventricle) or the femoral vein (right ventricle) is used as circulatory support in patents with severe cardiac shock....
5169381 Ventricular assist device  
A ventricular assist device for documenting compressive forces on the right and left ventricular surface of a heart in terms of pressure reactions transmitted from fluid contents in sacs adjacent...
5163910 Intracatheter perfusion pump apparatus and method  
An intracatheter pump apparatus and method is described for infusing fluids through a lumen of a catheter. The intracatheter pump includes a motor or power source on the outside of the catheter...
5158097 Paraneural stimulating lead  
This invention pertains generally to an implantable medical lead for stimulating muscle or tissue contraction and a method for using the same, and specifically to a paraneural electro-stimulating...
5147281 Biological fluid pumping means and method  
A ventricular assist device for temporary assistance to persons with failing or damaged hearts. A container includes inlet and outlet ports to the patient's circulatory system and a pumping...
5147388 Auxiliary artificial heart of the embedded-in-body type  
An auxiliary artificial heart embedded in the human body. The auxiliary artificial heart has an apex cordis area ring and a body. The apex cordis area ring is embedded in a cut-out apex cordis...
5147392 Pumping drive unit  
A pumping unit is disclosed which alternately applies a positive and a negative pressure, both of given values, to aa drive chamber of an artificial heart. In a first and a second embodiment, air...
5145333 Fluid motor driven blood pump  
A rotary blood pump includes an impeller in a pump chamber driven by a fluid motor. In a first preferred embodiment, the fluid motor includes a rotary member having a series of cupped fluid...
5139517 Orthotopic intraventricular heart pump  
An intraventricular pump (IVP) is a surgically-implanted orthotoxic heart pump capable of augmenting either one or both of the heart's ventricles. The IVP pumps blood using an internal diaphragm...