Matches 351 - 400 out of 598 < 1 2 3 4 5 6 7 8 9 10 11 12 >
Match Document Document Title
5658237 Cardiac assist device having improved muscle stimulation  
A cardiac assist device which provides an improved method of conditioning a skeletal muscle graft. In particular the present invention features a memory. The memory contains a regime to transform...
5653676 Step-down skeletal muscle energy conversion method  
This invention provides a simple skeletal muscle linear pull energy convertor which can harness the maximal amount of muscle power for a wide variety of implantable medical devices, including the...
5647380 Method of making a left ventricular assist device  
A method of making a left ventricular assist device (LVAD) using muscle wrapped around a mandrel to form a muscle pouch, the open end of which is sewn to a circular sheet of patch material having...
5643215 Gas exchange apparatus and method  
The invention comprises the use of helical propellers as pumping mechanisms, in various sizes and configurations, to improve upon present devices involving the circulation of liquid solutions...
5643172 Tubular circulatory assist device  
A circulatory apparatus for assisting the movement of fluids with a pulsatile flow. The circulatory apparatus includes a restrictable tube, an element for passively restricting a segment of the...
5632716 Apparatus and method of muscle training in dynamic cardiomyoplasty  
A pacemaker or similar cardiac and cardiomyoplasty muscle stimulator is provided which during a training period of said muscle, defining alternating training and augmentation phases. During...
5628719 In vivo mechanical energy source and perfusion pump  
An in vivo source of mechanical energy is provided in close proximity to its load. In the disclosed embodiments, the mechanical energy source is a miniaturized motor ("micromotor") and the load is...
5613935 High reliability cardiac assist system  
A high reliability cardiac assist system is provided for permanent use. An electric motor having dual sets of coils rotates the impeller of an intraventricular axial flow pump in the preferred...
5603337 Two-stage cardiomyoplasty  
Heart failure may be treated by grafting a skeletal muscle around the heart in a procedure called cardiomyoplasty. The muscle graft is stimulated to contract in synchrony with the heart by a burst...
5597377 Coronary sinus reperfusion catheter  
A catheter for retroperfusion of myocardium has an infusion tip, such that when retroperfusing myocardium, the tip extends within the coronary sinus to a depth in a range of about 2 to 4 inches (5...
5578012 Medical fluid pump  
A medical pump apparatus including an internally sterile pumping chamber having a flexible diaphragm forming a wall portion and a drive rod extending through the diaphragm in a rotating vane...
5575766 Process for the nonsurgical mapping and treatment of atrial arrhythmia using catheters guided by shaped guiding introducers  
A process for the treatment of atrial arrhythmia by use of ablation and/or mapping procedures comprising ablating discrete ablation tracks within the left and right atrium of the heart by use of...
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...
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...
5558617 Cardiac compression band-stay-pad assembly and method of replacing the same  
A ventricular assist device for a heart includes a compression band-stay-pad assembly for encircling substantially the heart perimeter and comprising an elongated band member or chain disposed in a...
5533957 Method of tissue retroperfusion  
A catheter for retroperfusion of myocardium has an infusion tip, such that when retroperfusing myocardium, the tip extends within the coronary sinus to a depth in a range of about 2 to 4 inches (5...
5531789 Sealing system of an artificial internal organ  
An artificial internal organ, such as an artificial heart, comprising a pump unit through which blood circulates and a drive shaft for driving the pump unit, the drive shaft having a shaft sealing...
5531776 Non-invasive aortic impingement and core and cerebral temperature manipulation method  
A method of non-invasively occluding the descending thoracic aorta to a desired extent in order to enhance cerebral and myocardial perfusion or the like, and/or of manipulating core and cerebral...
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...
5498228 Electromagnetic bi-ventricular assist device  
A device and method for assisting ventricular output in a human heart by compressing the heart. In the method, an electrocardiogram is generated as a function of the electrical activity of the...
5484385 Intra-aortic balloon catheter  
A balloon for an inter aortic balloon pump having an elongate tapered section extending from a proximal end of minimal diameter and progressively increasing in diameter toward the distal end. The...
5479946 Muscle energy converter  
A muscle energy converter comprised of a piston having an attachment head for connection to a muscle. The muscle energy converter also comprises a cylinder having a chamber in which the piston is...
5470208 Fluid pump with magnetically levitated impeller  
A fluid pump with a rotary impeller is disclosed which comprises an electromagnetically-driven, bearing-free, seal-free rotary impeller levitated by localized opposed, magnetic forces and by fluid...
5456715 Implantable mechanical system for assisting blood circulation  
Implantable mechanical system for assisting blood circulation using a blood circulation pump and wherein the system, being actuated by the power produced by the linear contraction of the skeletal...
5449342 Apparatus for assisting blood circulation  
An apparatus for assisting blood circulation includes an inflow tube which can be inserted into the right atrium from a peripheral blood vessel or which can be inserted into the left atrium from a...
5443504 Basic skeletal muscle energy conversion system  
This invention provides a simple skeletal muscle linear pull energy convertor which can harness the maximal amount of muscle power for a wide variety of implantable medical devices, including the...
5443503 Artificial heart pump  
An artificial heart pump comprises a cylindrical stator provided between the inner surface of a casing and a rotor so as to establish a blood flow channel between the outer surface of the stator...
5437601 Blood conduit and pulsatile cardiopulmonary bypass pump system  
A valveless blood conduit for pulsatile cardiopulmonary bypass pump constructed and arranged to provide a surge chamber, a pumping chamber and a reservoir portion, externally valved for use in a...
5433731 Mechanical defibrillator and method for defibrillating a heart  
An implantable heart defibrillator and a method for defibrillating a heart, employ a shock pulse generator for delivering a defibrillation shock to a heart, the delivered energy being mechanical....
5429144 Coronary artery by-pass method  
A stent is disposed in the myocardium so that it extends only in the myocardium. The stent may extend only partially through the myocardium, from the left ventricle of the heart or from a coronary...
5421807 Circulatory assist system  
A circulatory assist system includes a blood pump, a tube connected at one end portion thereof to the blood pump and having an inner space, a driving device having an outlet connected to the other...
5409444 Method and apparatus to reduce injury to the vascular system  
An apparatus and method for reducing peak systolic blood pressure and the rate of change of velocity of the blood flow in a living being by passively absorbing a portion of the blood pressure...
5409019 Coronary artery by-pass method  
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....
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 muscle...
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...
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...
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...
5376114 Cannula pumps for temporary cardiac support and methods of their application and use  
A cannula pump is provided which incorporates a miniature rotary pump into a cardiac cannula of essentially the same size as currently utilized with routine cardiopulmonary bypass. The pump may be...
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 a...
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...
5344385 Step-down skeletal muscle energy conversion system  
This invention provides a simple skeletal muscle linear pull energy convertor which can harness the maximal amount of muscle power for a wide variety of implantable medical devices, including the...
Matches 351 - 400 out of 598 < 1 2 3 4 5 6 7 8 9 10 11 12 >