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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...
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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 position...
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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 sleeve...
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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...
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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...
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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,...
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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)....
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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.
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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 the...
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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...
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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...
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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...
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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. The...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 and...
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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 and...
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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...
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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...
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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 can...
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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 parameter...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 capacity...
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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...
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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...
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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...
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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...
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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...
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