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5135467 Implantable system and method for coronary perfusions assistance  
An implantable coronary perfusion assist system to divert blood from large arteries, such as the aorta, to small arteries, such as the coronary arteries where additional blood flow is needed. The...
5135539 Quick-connect, totally implantable cardiac prosthesis with floating membranes and removable sensitive elements  
This invention relates to an implantable cardiac prosthesis constituted by a quick-connect, one-piece module comprising two ventricular chambers, rendered biocompatible, independent and activated...
5133744 Tubular-valued artificial heart  
The artificial heart is designed for intrathoracic implantation, while its operation is effected by means of an extracorporeal control and energy feed system, form by a reduced console and...
5131905 External cardiac assist device  
An external cardiac assistance device is provided for augmenting cardiac contractions. The device includes a flexible, non-distensible shell adapted to be positioned over the base of the heart. A...
5129789 Means and method of pumping fluids, particularly biological fluids  
A system for pumping of fluids, particularly biological fluids such as blood, including a tubular length of magnetostrictive material. One-way valves are positioned generally in opposite ends of...
5118264 Purge flow control in rotary blood pumps  
A blood pump includes a housing an inlet and outlet communicating with a pump chamber. A rotor received in the pump chamber is rotated by a drive motor. A drive shaft extending between the motor...
5112349 Heart assist pump  
A temporary circulatory assist pump is disclosed for implantation in the heart of a patient through the femoral artery. The pump is driven by a flexible drive shaft extending through a catheter...
5112292 Helifoil pump  
A temporary circulatory assist pump is disclosed for implantation in the heart of a patient through the femoral artery. The pump is driven by a flexible drive shaft extending through a catheter...
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...
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...
5100383 Catheters permitting controlled diffusion  
A non-thrombogenic surface is provided by forming a reservoir from which anticoagulant solution can permeate through a flexible wall (5, 6) of bio-compatible permeable material. Such reservoirs...
5098256 Viscous seal blood pump  
A blood pump includes a housing having an inlet and outlet communicating with a pump chamber. A rotor received in the pump chamber is rotated by a drive motor. A drive shaft extending between the...
5098442 Muscle contraction control by intramuscular pressure monitoring  
A technique for monitoring the performance of a skeletal muscle used in a cardiac assist sytem. The skeletal muscle is surgically wrapped about the heart, the descending aorta, or a chamber...
5098370 Heart assist device  
There is provided a heart assist system aimed at saving lives of patients who's heart is failing temporarily. The assist system comprises means for continuously monitoring the hemodynamic...
5092879 Intraventricular artificial hearts and methods of their surgical implantation and use  
A method of treating heart failure is disclosed in which, without removing the damaged heart, implantation of prosthetic blood-pumping means within the natural heart sustains its function. The...
5089020 Monoseptal, bi-ventricular artificial heart  
A total artificial heart, comprising a heart enclosure and an interior rigid septum attached at its periphery to the interior surface of the heart enclosure. This septum divides the heart into two...
5089019 Muscle work output monitor by intramuscular temperature variation measurement  
Apparatus and method for monitoring performance of a skeletal muscle powered cardiac assist system. A chronically implantable temperature sensor is imbedded within the skeletal muscle. Muscle...
5089018 Total heat prosthesis  
Total heart prosthesis including a casing implantable in the pericardial cavity, the geometry of which is similar to that of the natural heart, with a motor device inside the casing which...
5069680 Muscle stimulator with variable duty cycle  
Apparatus and method of controlling a muscle stimulator by varying the duty cycle. The muscle stimulator is particularly adapted to a skeletal muscle powered cardiac assist system. An activity or...
5067960 Muscle fitness detection by colorimetry  
Apparatus and method for monitoring the performance of skeletal muscle used in a skeletal muscle powered cardiac assist system. The monitoring is performed by an oxygen sensor which determines 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...
5061256 Inflow cannula for intravascular blood pumps  
An inflow cannula for intraortic blood pumps has a curved, spring-loaded body for blind retrograde insertion through the aortic arch, and a soft, beveled foldable but resilient tip which properly...
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...
5055005 Fluid pump with levitated impeller  
A fluid pump with rotary impeller is disclosed which comprises an electromagnetically driven rotary impeller levitated by localized opposed fluid forces. Levitation by localized opposed fluid...
5045051 Leak detector  
A system for detecting leakage in a device having a fluid-driven membrane inserted in the body, for example, a balloon pump, includes a fluid drive circuit with a moisture remover having a...
5007927 Muscle-powered cardiac assist device  
A method and apparatus is provided for enhancing blood circulation, and thereby reducing fatigue, in a skeletal muscle used for powering a cardiac assist device wherein the muscle is positioned to...
5006104 Heart pump having contractible guide mechanism for pusher plate  
A blood pump is disclosed that is useful as ventricle assist or replacement device comprising a housing having a blood chamber and inlet and outlet ports for the ingress and egress of blood to and...
4995857 Left ventricular assist device and method for temporary and permanent procedures  
A left ventricular assist device and method is utilized to relieve the hemodynamic burden on a diseased left ventricle in the heart of a patient by inserting a shunt having an impellar for...
4994017 Circulation apparatus  
A circulation apparatus with a compact construction and high reliability comprising a ring-shaped support frame which has a joint which can be connected in the vascular system and turbine blades...
4985014 Ventricular venting loop  
A catheter and fluid pumping apparatus and the method for bypassing portions of the heart to temporarily reduce the work load on the heart muscle. A double tube catheter is introduced into the...
4981484 Modified elliptical artificial heart  
An artificial heart device for producing heart pumping action as part of a total artificial heart implant comprising a housing of elongate configuration enclosing a pumping volume of sufficient...
4979936 Autologous biologic pump motor  
An apparatus and method for use in assisting a human heart is disclosed. A skeletal muscle is formed into a pouch which then surrounds a collapsible, shape-retaining bladder. The bladder is...
4979882 Spherical rotary machine having six rotary pistons  
A spherical rotary machine which may be embodied as a pump, internal combustion engine, compressor or similar other device includes an outer shell with a substantially spherical interior surface,...
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...
4969864 Venticular assist device  
A blood sac for a heart assist device having pump pusher plates attached to its sides and an actuator system that is pivotally attached to the plates. The actuator mechanism has a movable fulcrum...
4968293 Circulatory assist device  
An assist device for the heart comprises a continuous flow pump for moving blood through a vessel and a muscle powered device for supplying pulsatility to the flow of blood, to simulate human...
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)...
4957477 Heart assist jacket and method of using it  
A heart assist device for insertion into the thoracic cavity of a patient comprises a double-walled jacket (10) adapted to enclose at least the ventricular portion of the heart (H), at least the...
4955856 Method and apparatus for installing a ventricular assist device cannulae  
A method for installing a ventricular assist device cannula of a novel type including a blood drainage cannula tube having a first end and a second end and a blood inlet cannula tube having a...
4944722 Percutaneous axial flow blood pump  
The reliability and compactness of a percutaneously insertable intravascular axial flow blood pump are improved by connecting the pump's rotor and drive cable through a resiliently extendable...
4927407 Cardiac assist pump with steady rate supply of fluid lubricant  
A centrifugal pump for left ventricle assist includes a pump housing forming an impeller chamber with inlet and outlet passages and enclosing an impeller rotatable to move blood through the...
4925377 Pump  
A blood pump, particularly intended as an extracorporeal blood pump, comprises a pump cylinder and two discs spaced apart in the longitudinal direction of the cylinder and substantially filling...
4919647 Aortically located blood pumping catheter and method of use  
A catheter and a method of use for pumping of blood through a living being's vascular system. The catheter has an expandable distal end portion and is introduced into the aorta so that that...
4908012 Chronic ventricular assist system  
An implantable ventricular assist system uses a small high-speed axial flow blood pump which may be grafted into the patient's circulatory system. The pump includes a blood tube in which the pump...
4906229 High-frequency transvalvular axisymmetric blood pump  
A high-frequency transvalvular blood pump for temporary cardiac assist provides suction to decompress the ventricular cavity during both systole and diastole. The intake end of the pump is...
4902291 Collapsible artificial ventricle and pumping shell  
An artificial ventricle for use as part of a total artificial heart for implantation within a living being as part of its circulatory system. The ventricle includes a soft and flexible blood...
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...
4895557 Drive mechanism for powering intravascular blood pumps  
A disposable, sterilizable cable drive unit for an intravascular blood pump includes a rotor enclosed in a fluid-tight enclosure which can be slipped into the stator of a drive motor. The unit is...
4888011 Artificial heart  
An artificial heart system employing left and right pumping chambers each divided by a membrane into a blood pumping chamber and a hydraulic pumping chamber and a hydraulic pumping system for...
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...