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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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5332403 |
LVAD with t-shape and unidirectional valve
A ventricular assist device comprises an artificial ventricle including a blood compartment, a pumping compartment and a pumping membrane separating the respective blood and pumping compartments.... |
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5324323 |
Multiple channel cardiosynchronous myoplasty apparatus
A neuromuscular stimulation apparatus and procedure, which employs multiple channels of stimulation for the purpose of supplying directional control of blood flow in addition to augmenting the... |
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5318501 |
Linear motion, muscle-actuated cardiac assist device
A linear motion, muscle-actuated cardiac assist device novelly uses a powering muscle whose contractions and relaxations are made in a substantially linear fashion, as opposed to the curvilinear... |
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5314469 |
Artificial heart
A cyclic action, electromechanically operated artificial heart having a pusher plate assembly disposed between a pair of bladders for alternately compressing one bladder containing blood directed... |
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5312341 |
Retaining apparatus and procedure for transseptal catheterization
The invention comprises retaining apparatus for transseptal catheterization and a procedure for the use of same. The retaining apparatus is a selectively deployable retaining means disposed at or... |
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5300113 |
Cardiac ventricular assistance device particularly for compensating for weakened heart muscle function and for maintaining the vital body functions
A single cardiac ventricular assistance device intended to integrate the ctions of a ventricular assistance device (V.A.D.) proper and of an aortic balloon pump (IABP) includes a single energy... |
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5300112 |
Articulated heart pump
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... |
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5290227 |
Method of implanting blood pump in ascending aorta or main pulmonary artery
This invention relates to a method of surgically implanting a blood pump into the ascending aorta or pulmonary artery of a patient with a diseased or damaged heart ventricle. One preferred type of... |
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5287861 |
Coronary artery by-pass method and associated catheter
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.... |
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5282849 |
Ventricle assist device with volume displacement chamber
A ventricle assist device for placement within a living body and including a self contained drive motor for generating pumping action with respect to a hydraulic pumping fluid. The ventricle... |
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5273518 |
Cardiac assist apparatus
Regulators for improved cardiac assist systems of the type including skeletal muscle powered fluid pressure means, a cardiac cup and/or an aortic balloon pump. The regulators convert the positive... |
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5271746 |
Implantable blood pump with inextensible deformable closed bag
The invention relates to an implantable blood pump of the type comprising a shell, a closed deformable bag, an inlet valve and an outlet valve, a drum arranged to roll over a wall of the bag, a... |
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5269811 |
Primary fluid actuated, secondary fluid propelling system
A primary fluid actuated, secondary fluid propelling system, suitable for use, for example, as an implantable, artificial heart device, comprises a unidirectional pump for pumping... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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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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.... |
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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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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... |
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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... |