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4846831 Manual back-up drive for artificial heart  
A manual back-up emergency drive device for air driven artificial hearts, particularly for the "Jarvik-7" heart, is adapted to be instantly connected to the air drive lines for the heart in the...
4846152 Single-stage axial flow blood pump  
A miniature high-speed intravascular blood pump is formed as a single stage with two rows of rotor blades and a single row of stator blades within a tubular housing. The rotor's first row produces...
4817586 Percutaneous bloom pump with mixed-flow output  
The outside diameter of an intravascular axial flow blood pump is reduced without reducing the size of its journal bearings by causing the pumped blood stream to exit through apertures in the...
4809676 Heart assist device and method of implanting it  
An implantable heart assist device includes member to be surgically positioned about the aorta, and includes a series of electromagnetic segments connected electrically to a source of electricity...
4781716 Artificial heart  
An improved artificial heart (10) for pumping blood. The artificial heart (10) comprises first and second pump units (12 and 14), each including a pump body (16) defining a collapsible bellows...
4779614 Magnetically suspended rotor axial flow blood pump  
An implantable axial flow blood pump maximizes the blood flow while minimizing the dimensions of the pump. By magnetically suspending a rotor of relatively small diameter coaxially in a...
4775887 Observation apparatus for artificial organs  
An observation apparatus for an artificial organ such as an artificial heart includes a first casing having the artificial heart and a video signal generating and transmitting apparatus therein...
4753221 Blood pumping catheter and method of use  
An elongated catheter for pumping blood through at least a portion of a being's vascular system. The catheter is of sufficiently small diameter and flexiblility to enable it to be passed through...
4688998 Magnetically suspended and rotated impellor pump apparatus and method  
A novel pump apparatus and method, the pump including a magnetically suspended and rotated impellor inside the pump housing. A novel sensor system detects the position of the impellor and thus...
4666443 Biventricular circulatory assist system and method  
A biventricular circulatory support system for a human patient is described. A mechanical first pump for assuming at least a part of the pumping load of the patient's left ventricle is implanted...
4662358 Electronic control system for a cardiac prosthesis  
An electronic control system for controlling the operation of a cardiac prosthesis is disclosed. The cardiac prosthesis includes dominant and subordinate ventricles which receive blood in response...
4651716 Method and device for enhancement of cardiac contractility  
An apparatus for ultrasonic irradiation of the heart either when the chest is open after surgery or through the chest wall. It may also be used in conjunction with electrical defibrillation...
4627419 Blood pump apparatus and method  
A blood pump apparatus and method for pumping blood and pressure treating blood for minimizing hemolysis, platelet degradation, microthrombus and bubble formation. A blood pump apparatus for...
4625712 High-capacity intravascular blood pump utilizing percutaneous access  
Full-flow cardiac assist is provided for cardiogenic shock patients without major surgery by a miniature axial-flow pump which can be inserted into the heart through the femoral artery and driven...
4621617 Electro-magnetically controlled artificial heart device for compressing cardiac muscle  
An artificial heart or heart strengthening device to simulate the natural heart pulsation of mammals by electromagnetic means which may operate alone or in conjunction with the natural heart.
4597381 Apparatus for monitoring an artificial internal organ  
The apparatus is intended to monitor operation of an artificial internal organ, such as an auxiliary heart, which is to be attached to the patient's body on the outer side. An optical fiber for...
4583525 Artificial heart driving apparatus  
Positive pressure and negative pressure are alternately applied to artificial hearts so as to drive the same. Each of driving systems includes a pressure sensor, and a solenoid valve connected...
4583523 Implantable heart assist device and method of implanting same  
The implantable heart assist device includes an elongated assembly extending transversely between the ribs of a person from the rib cage to the aorta of the heart to be assisted. The elongated...
4573883 Disposable blood pump  
A hemocompatible flexible diaphragm and flexible wall pumping chamber positioned in a rigid body and actuated by alternating positive and negative fluid pulses. An inlet valve and an outlet valve...
4565497 Pump actuator  
An actuator is described for use in a pump having a pump chamber whose contents are expelled by movement of a pair of pusher plates toward one another. The actuator includes opposed solenoid...
4557673 Implantable pump  
A chamber structure in a blood pump or the like is described. The structure includes a deformable sac having an annular side wall which is held in a rigid condition, and a pair of opposed circular...
4553532 Externally valved shunt for cardiopulmonary bypass pump  
To decrease hemolysis and reduce the cost of single use disposable tubing used during surgery, valve elements pivotally suspended in the bypass pump compression chamber respond to gravity and...
4524466 Continuous rotation reversible pitch axial thrust heart pump  
A continuous and unidirectional rotation reversible pitch axial thrust heart pump having a blood handling housing with first inlet and outlet check valves connected to the housing and second inlet...
4516567 Sequential pneumatic control device, supplied with electric energy  
The invention relates to a sequential pneumatic control device, supplied with electric energy, for a total cardiac prosthesis (4) formed by a biventricular monobloc assembly with pneumatic...
4512726 Pump adaptable for use as an artificial heart  
A pump adaptable for use as a human heart includes first and third pump chambers separated from an intermediate second chamber which may house a motor. The chambers are separated by diaphragms...
4506658 Pericardiac circulatory assistance device  
A circulatory assistance device for implantation in the human body to assist a failing heart. The device comprises a truncated conical structure, made up of rigid pieces connected by volumetric...
4493314 Heart pump  
A pulsatible outflow, continuous and non-sucking inflow, artificial heart pump utilizes a pump body in which the ends of a pair of passages open at two spaced locations on the body. One of the...
4465063 Cardiac flow measurement system and method  
The volume of blood pumped by an artificial ventricle or ventricular assist device is extracorporeally monitored as a function of the volume of fluid used to drive the ventricle. The ventricle is...
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...
4457673 Pump and actuator mechanism  
A pump is described in which a flexible enclosure defines a pump chamber whose contents are expelled by movement of a pusher plate engaged with the enclosure. The pusher plate is moved by an...
4448190 Control system for body organs  
In a body organ control system having a pulse generator connected to a source of electrical power for generating a series of electrical timing pulses, an auxiliary pumping device is attached to a...
4437815 Pump, and an apparatus incorporating the pump for infusing liquid medicine  
The pump has a chamber in which a piston reciprocates to pump a liquid. The piston is moved by having secured thereto the armature of at least one electromagnet (preferably two). The coil of the...
4427470 Vacuum molding technique for manufacturing a ventricular assist device  
A ventricular assist device and a method of manufacturing the ventricular assist device. The device is generally flat in shape and gently curved so that it may be comfortably implanted under the...
4375941 Method and apparatus for pumping blood  
A pump and method for moving a fluid, as blood, having a body and end members forming a cylindrical chamber. A free floating piston located in the chamber is moved along the length of the chamber...
4314550 Method of treating an arrested heart  
A heart in induced arrest such as ischemic arrest during a surgical operation is treated to protect it from stiffness, rigor, contracture and a decrease in diastolic compliance or elasticity by...
4250872 Blood pulsating and/or pumping device  
A continuous length of flexible polymeric tubing having a smooth fissureless inner surface throughout is provided with a region intermediate its ends which region has an inside diameter greater...
4240409 Apparatus for assisting circulation of blood  
Apparatus is disclosed for mechanically assisting circulation of blood in a patient for periods of up to a week or two until the patient's heart strengthens sufficiently to take over the full...
4221548 Dual action solenoid pump  
A pump for moving a fluid, as blood, having a body and end members forming a cylindrical chamber. A free floating piston located in the chamber is moved along the length of the chamber with a...
4213207 Artificial heart and method of pumping blood  
A construction having utility as a replacement for one or both chambers of a human heart, constituting a pump which operates in accordance with solenoid principles. A hollow and firm cylindrical...
4185617 Magnetically driven cardiac-assist pump system  
A magnetically driven pump system designed for use with a body-implantable heart-assist device. The system includes a body-implantable bellows-type pump adapted to transfer fluid to and from the...
4162543 Artificial heart  
An artificial heart comprising at least one blood circulating pump having a transparent housing divided into two chambers by a diaphragm. One of the chambers is a hydraulic chamber having an inlet...
4135253 Centrifugal blood pump for cardiac assist  
A centrifugal blood pump and method of pumping blood is disclosed to provide assistance for a dysfunctional heart. The pump is provided with a magnetic drive system which permits a synchronous...
4129129 Venous return catheter and a method of using the same  
A method and device for connecting a life support machine to the heart of a patient during open heart surgery which includes a two-stage venous return catheter having spaced inlet openings in the...
4105016 Heart pump  
A centrifugal blood pump and method of pumping blood to reduce the pressure in either the right or left ventricle in synchronism with the ventricular contractions of a failing heart. The pump is...
4084266 Artificial implant with fiber-flocked blood-contacting surface  
Blood-contacting surfaces of artificial implant devices which have been flocked with fibers of a blood-compatible polymeric material to promote formation of a stable and viable biological lining...
4080958 Apparatus for aiding and improving the blood flow in patients  
Improved blood pumping apparatus is disclosed which includes a smooth avalvular deflatable section through which blood flows, said section mounted within a rigid avalvular airtight housing, gas...
4058855 Cardiac pumping device  
A pulsatile flow pumping unit adapted to serve as a total cardiac replacement device, a cardiac assist pump for orthotopic placement, for extracorporeal application in conjunction with a membrane...
4014318 Circulatory assist device and system  
A circulatory assist device and system are provided for controlling, wholly or partially, the pumping of blood through a blood vessel or vascular prosthesis. The assist device is comprised of an...
4008710 Blood pump  
A blood pump comprises a rigid outer wall which defines a squeeze pump that is operated by a pumping medium. A valve mechanism is used for controlling the flow of blood through the pump. The...
3995617 Heart assist method and catheter  
Method and device for augmenting the action of an ailing heart having an incompetent aortic valve or incompetent left ventricle wherein blood is directly sucked from the left ventricle, while...