Matches 101 - 150 out of 171 < 1 2 3 4 >
Match Document Document Title
5318592 Cardiac therapy system  
A cardiac therapy system for use with a conventional cardiac pacemaker ciit is controlled by activity signals of the autonomous nervous system (ANS) in a patient's body which constitute a measure...
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...
5251621 Arrhythmia control pacer using skeletal muscle cardiac graft stimulation  
An antiarrhythmia pacemaker and method detect and confirm the occurrence of an abnormal condition of a patient's heart selected from the group comprising tachycardia, fibrillation and precursors...
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 attachd...
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.
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...
5169379 In-series ventricular assist system and method of controlling same  
An in-series ventricular assist system for assisting the circulation of blood in a patient is disclosed. A pumping bladder is disposed in the thoractic aorta of the patient and selected physiologic...
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 area...
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...
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...
5059167 Retroperfusion and retroinfusion control apparatus, system and method  
Retroperfusion control apparatus for supplying arterial blood of a patient to the venous side of the patient's heart including a pump having an inlet and an outlet and a piston movable through a...
5040536 Intravascular pressure posture detector  
Apparatus and method for detecting changes in the posture of a patient. Two pressure sensors are chronically implanted at different places in the cardiovascular system. One may be positioned in the...
5020516 Circulatory assist method and apparatus  
Improved cardiocirculatory assistance is provided to a patient by detecting the onset of ventricular ejection in the cardiac cycle of the patient and selectively increasing intrathoracic pressure...
5006111 Medical pump device and a method for compensating a deviation of a measured blood flow rate  
A medical pump device is constructed so that a pulsation force is applied to the blood in the vicinity of an artery, which is reconstructed after a bypassing operation has been completed, so as to...
4976681 Pacer interface device  
A method and device for providing a timing signal to a medical device in response to light emitting indicators on a cardiac pacer. The device is optically coupled to the light emitting indicators,...
4976729 Elliptical artificial heart  
An artificial heart device for producing heart pumping action as part of a total artificial heart implant comprising a semi-rigid housing of approximate ellipsoidal configuration which encloses a...
4957504 Implantable blood pump  
An implantable blood pump (10) for providing either continuous or pulsatile blood flow to the heart. The pump includes a stator (16) having a cylindrical opening (14), an annular array (36 or 38)...
4934996 Pressure-controlled intermittent coronary sinus occlusion apparatus and method  
The coronary sinus is intermittently occluded by use of means for occluding the sinus, a pressure transducer for sensing the fluid pressure within the sinus and providing corresponding fluid...
4922910 Cannula having an electrode  
A cannula has an electrode therein for detecting electrocardiographic signals. The electrode is located in the inner wall of the cannula and has anti-thrombus characteristics. The electrode...
4902272 Intra-arterial cardiac support system  
An intra-arterial cardiac support system including multiple balloons for placement in the descending aorta with one balloon serving as a pumping balloon and one or more balloons serving as valve...
4883055 Artificially induced blood pulse for use with a pulse oximeter  
An artificially induced blood pulse used for measuring oxygen saturation in arterial blood is produced by a cuff, wrapped around a body member having an artery upstream from a testing site, when a...
4865581 Retroperfusion control apparatus, system and method  
Retroperfusion control apparatus for supplying arterial blood of a patient to the venous side of the patient's heart including a pump having an inlet and an outlet and a piston movable through a...
4863461 Artificial ventricle  
An artificial ventricle for replacing the human heart and comprising a shell formed from an upper housing and a lower base. A plurality of thin-walled, flexible pumping diaphragm layers are...
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...
4822357 Auxiliary artificial heart  
An auxiliary artificial heart which comprises a pump having a single opening that is connected to the aorta and is operable in synchronism with the heart of the patient to assist the normal...
4813952 Cardiac assist device  
A muscle-powered pump to assist the natural heart is disclosed. The device comprises an oblate, spheroidal-shaped pumping chamber surrounded by innervated muscular tissue. The device may be coupled...
4809681 Electrocardiographic measurement method for controlling an intra-aortic balloon pump  
A pair of spaced electrodes are disposed inside the thoracic aorta near the heart and are used to sense R- and P-waves in an ECG signal. The electrodes are moved to an ideal intra-aortic position,...
4804358 Coronary perfusion pump  
Coronary perfusion apparatus in which a catheter is held in place in the coronary artery by an intra-aortic balloon. The catheter carries a pressure sensor which is positioned adjacent the heart...
4782817 Ventricular support system  
An extracorporate ventricular support system includes a two bladder pump employing continuous gravity fill to the first bladder, while the second bladder is pneumatically driven to produce a...
4756302 Blood pumping system and method  
A heart-assist system and a method for operating same are described in which a pump is connected to a ventricle to receive output therefrom. An actuator operates to cause the pump to conduct a fill...
4697574 Pump for assistance in circulation  
A first balloon 11 plugs the aorta 1 during the diastole, upstream of the supraaortic arteries 2, 3. A second balloon 12 insures a propulsion of blood toward the coronaries 6,7. A pump 8 commands...
4665896 Power supply for body implant and method of use  
An implanted blood pump system is described wherein power for driving the pump is provided by a transcutaneous transformer having an external primary winding and an implanted secondary winding....
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...
4648385 Apparatus for driving a medical appliance  
With a driving system being separated by a diaphragm into two sections, a predetermined pressure is applied to the primary side of the diaphragm using air and helium gas or the like is used on the...
4598697 Blood pump apparatus  
There is provided a blood pump apparatus which can supply a pulsating flow of the blood to a body of a patient at a desired rate of flow. R waves are detected from an output of an...
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...
4541417 Coronary augmenter  
A coronary augmenter can affect blood flow in a patient. The augmenter has a timer and a stimulator. The timer can repetitively produce a trigger signal. The stimulator can repetitively apply to...
4459977 Coronary sinus retroperfusion apparatus for the treatment of myocardial ischemia  
An apparatus for diastolic blood retroperfusion of the coronary sinus in synchronism with the heartbeat rate for the treatment of infarctions. A connecting tube between an artery and the coronary...
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...
4376312 Hydraulically actuated cardiac prosthesis  
A cardiac prosthesis having a hydraulically actuated compressible blood pump. An actuation chamber adjacent the blood pump receives pulses of hydraulic actuation fluid from an actuator pump through...
4334180 Electromagnetic driving mechanism for oscillating displacement pumps  
Electromagnetic driving mechanism for oscillating displacement pumps (10) is described which comprises a linear motor (21, 22) and a control circuit (51, 52, 53, 54). The control circuit controls...
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...
4204524 Method and apparatus for controlling cardiac assist device  
Method and apparatus for controlling in-series cardiac assist devices which uses the afterload phase angle as the operating criterion. The phase of the pump driving waveform is controlled with a...
4192293 Cardiac assist device  
A cardiac assist device which operates by cyclically exerting pressure through an implanted inflatable sheath, which surrounds the myocardium. The sheath is rigid and encloses a bladder or...
4135496 Extracorporeal circulation apparatus  
The extracorporeal circulation apparatus in accordance with the invention comprises a plurality of pneumatic diaphragm pumps incorporated in parallel relationship in a single fluid-flow system of...
4046137 Solenoid operated blood pump drive system  
A solenoid operated drive system or actuating unit for driving blood pumps such as intra-arterial "balloon" pumps, implantable pulsatile pumps, external pumps and the like, wherein a shaft attached...
4034742 Apparatus for mechanically assisting circulation of the blood in the human body  
Apparatus for mechanically assisting circulation of the blood in the human body comprises a pumping chamber outside the cardiovascular system of a patient but communicating with said system through...
3985123 Method and means for monitoring cardiac output  
A cardiac output monitor. The monitor receives signals representing radial arterial pressure, balloon pressure, balloon drive and balloon volume from an intra-aortic balloon pumping system. These...
3974825 Remote electrical monitoring of gas activated blood pumps  
An electrical capacitance measurement system for monitoring at a distance the instantaneous blood volume within the body of an air or gas activated blood pump. Electrical capacitance changes within...
Matches 101 - 150 out of 171 < 1 2 3 4 >