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6066085 |
Single chamber blood pump
A blood pump apparatus can include a pump housing having a drive chamber containing a drive mechanism. A cupped member can be connected to the housing and the drive mechanism can include a motor...
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6063115 |
Cardiac assistance system
A system to provide cardiac assistance to a patient's heart. The system includes a pulse generator adapted to be coupled to patient's heart and adapted to be coupled to a skeletal muscle ventricle...
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6058593 |
Method for producing a micro motor
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6057689 |
Apparatus and method for leak detection in a fluid-filled balloon useful to treat body tissue
An apparatus for detecting leaks in a fluid-filled device used to treat a patient's tissue includes an catheter having an expandable device defining a fluid reservoir about the distal end of the...
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6050932 |
Control circuit for an implantable heart-assist pump of the back-pressure balloon type
The pump (10) has variable volume means (24) co-operating with a distinct volume (20) through which the blood flows for the purpose of varying said volume (20) through which the blood flows in...
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6042347 |
Pedia-cadio pump
An implantable electric pump for assisting blood flow in a patient in need thereof comprises a non-rotating pump housing and an electric motor enclosed within the housing, all motor components...
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6030336 |
Pressure generator for a counterpressure cardiac assistance device
A pump comprises variable volume means inserted in an artery, in particular, the descending aorta, enabling the volume through which the blood flows in this location to be modified cyclically and...
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6030335 |
Implantable heart-assist pump of the back-pressure balloon type
The pump comprises: an essentially rigid body open at both ends and designed to be inserted in the down aorta artery; a flexible and elastic membrane (18) in the form of a sleeve connected in...
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6007478 |
Cannula having constant wall thickness with increasing distal flexibility and method of making
A cannula for use as for example on the inflow end of an implantable intravascular heart pump. The stiffness of the cannula is differentiated along its length, wherein its proximal end is stiffer...
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6008625 |
Use of double cells to power an implantable medical device
A power source including two alkali metal/transition metal oxide cells discharged in parallel to power an implantable medical device is described. The first cell powers the medical device in both a...
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6001056 |
Smooth ventricular assist device conduit
A smooth-walled non-crimped inflow conduit for an implantable ventricular assist system. The conduit has an internally smooth lumen surface for enhanced washing of the conduit under irregular blood...
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5984857 |
Step-down skeletal muscle energy conversion system
This invention provides a simple skeletal muscle linear pull energy convertor which can harness the maximal amount of muscle power for a wide variety of implantable medical devices, including the...
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5971910 |
Method and apparatus for assisting a heart to pump blood by applying substantially uniform pressure to the ventricles
An apparatus and method for assisting a heart to pump blood includes a housing that defines an internal chamber for receiving a heart. The housing has a first opening to supply fluid to the...
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5947892 |
Rotary blood pump
A blood pump that comprises a pump housing having a blood flow path therethrough, a blood inlet, and a blood outlet; a stator mounted to the pump housing, the stator having a stator field winding...
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5941813 |
Cardiac assist device
In a cardiac assist device, a housing has an inlet and outlet connectable to a patient's cardiovascular system. A pump is located within the housing to force blood that has entered through the...
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5935095 |
External slot valve for controlling blood flow through the outlet of a shunt of a cardiopulmonary bypass pump
An external slot valve for controlling blood flow through the outlet of a shunt of a cardiopulmonary bypass pump wherein a valve seat having a knife edge is fixedly connected to the fixed plate of...
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5928132 |
Closed chest intra-aortic balloon based ventricular assist device
A closed chest intra-aortic balloon catheter based ventricular assist device comprising an intra-aortic balloon (IAB) catheter and a pumping chamber having a smaller diameter portion and a more...
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5924975 |
Linear pump
A linear pump includes a housing having a bore and axially spaced apart inlet and outlet. A first check valve is joined to the housing for controlling flow of fluid through the bore. A piston is...
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5921913 |
Statorless intravascular microaxial flow pump
An intravascular microaxial pump has an integrated configuration that enables both the drive unit as well as the pumping segment to be advanced through a patient's vasculature. The device includes...
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5910124 |
Ventricular assist device and method
Cardiac ventricular assist apparatus adapted to be placed by insertion through an incision in the wall of the upper abdomen below the rib cage and an incision in the inferior aspect of the...
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5908378 |
Bi-ventricular cardiac assist device
A bi-ventricular cardiac assist device maintains blood circulation in a patient having a minimally functioning or malfunctioning heart. The biventricular cardiac assist device includes a...
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5904646 |
Infection resistant power cable system for medically implanted electric motors
Implanted medical devices such as heart assist devices powered by electric motors or solenoids require a high amount of power compared to other electric implants such as pacemakers which do not use...
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5902229 |
Drive system for controlling cardiac compression
An inflation system for independently controlling the rise time and plateau level of a pressure profile applied to an inflatable chamber includes a pneumatic source disposed in fluid communication...
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5888186 |
Muscle energy converter activated assist system and method
A system for assisting the operation of a patient's heart. The system includes a muscle energy converter which is capable of connecting to a muscle of the patient for converting energy of the...
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5888241 |
Cannula pumps for temporary cardiac support and methods of their application and use
A cannula pump is provided which incorporates a miniature rotary pump into a cardiac cannula of essentially the same size as currently utilized with routine cardiopulmonary bypass. The pump may be...
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5851174 |
Cardiac support device
An apparatus for pumping blood includes an elongated housing dimensioned to be at least partially positioned within the heart of a patient, a rotating member supported for rotational movement...
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5848962 |
Device for assisting cardiac function
Disclosed is a device for assisting cardiac function having the following atures: at least one half-shell is provided, the interior and exterior contours of which are designed in such a manner that...
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5843088 |
Tool and method for installation of a ventricular cannulation device
A ventricular cannulation device. An inner part is placed in the cardiac chamber and an outer part is placed outside the cardiac wall. Each of the inner and outer parts is equipped with means for...
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5827171 |
Intravascular circulatory assist device
A circulatory assist device, having an outer balloon and an inner balloon, with a control space between the outer and inner balloons. The device is mounted on a catheter, collapsed to a...
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5824070 |
Hybrid flow blood pump
A novel hydrodynamic blood pump with a very clean flow path free of outflow stator blades which have been found to be a site of blood clot formation is introduced. The invention combines an axial...
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5823930 |
Cam controlled pulsatile flow pump for neonatal and biventricular cardiac support systems
A cam controlled pulsatile flow pump for neonatal and biventricular cardiac support systems wherein cylindrical cams having various profiles designed for a particular patient are selectively...
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5823185 |
Manual pressing and automatic air breathing cardiopulmonary resuscitation first-aid device
This invention relates to a manual pressing and automatic air breathing cardiopulmonary resuscitation first-aid device, mainly comprising a manual pressing shaft, a pump, an air storage tank, a...
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5820542 |
Modified circulatory assist device
A circulatory assist device, having a housing and a pumping membrane, with a control chamber and a pumping chamber. The device is mounted on a catheter, collapsed to a sufficiently small diameter...
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5814102 |
Process for training a skeletal muscle for a biomechanical heart and biomechanical heart using such a muscle
A method for dynamically training a skeletal muscle (1) to be used for a biomechanical heart involves wrapping the skeletal muscle (1) around a deformable training device (2) which can contract,...
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5810708 |
Ventricular assist conduit with externally supported tissue valve
A ventricular assist device includes a pair of valved conduits and a pumping portion connected by these conduits into the circulatory system of a host patient. The pumping portion and valved...
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5807384 |
Transmyocardial revascularization (TMR) enhanced treatment for coronary artery disease
A transmyocardial revascularization (TMR) enhanced treatment for coronary artery disease and other medical procedures utilizing a source of laser energy and a laser delivery means attached thereto,...
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5766207 |
Driver and method for driving pneumatic ventricular assist devices
A driver for at least one pneumatically-actuated ventricular assist device (VAD), includes a portable housing which encloses a single pump for performing blood-filling and blood-emptying operations...
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5758664 |
Method of maintaining a left ventricular assist device
A method of making a left ventricular assist device (LVAD) using muscle wrapped around a mandrel to form a muscle pouch, the open end of which is sewn to a circular sheet of patch material having...
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5749839 |
Direct mechanical bi-ventricular cardiac assist device
A direct mechanical bi-ventricular cardiac assist device comprises a ventricular actuation cup having two independently operated diaphragms for independently actuating the right and left ventricle...
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5743845 |
Biventricular pulsatile cardiac support system having a mechanically balanced stroke volume
A biventricular pulsatile cardiac support system having a mechanically balanced stroke volume wherein a pair of side-by-side, valveless, compressible conduits extend through the compression chamber...
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5738626 |
Two-step cardiomyoplasty with ventricular reduction
Cardiomyoplasty is a high mortality procedure (fifty percent two year mortality) with limited hemodynamic benefit. Excision of left ventricular myocardium in dilated congestive heart failure is...
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5728069 |
Device for the pulsed pumping of liquids, particularly blood
A device for the pulsed pumping of liquids, particularly blood, has a body in which are formed a pumping chamber in which a pulsed flow is imparted to the liquid, an inlet duct upstream of the...
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5722930 |
Reciprocating pump circulatory assist arrangement
In one embodiment described in the specification, a surgically implantable reciprocating pump employs a check valve as the piston, which is driven by a permanent magnet linear electric motor to...
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5722429 |
Connecting arrangement for medical device
In one embodiment described in the specification, a surgically implantable reciprocating pump employs a check valve as the piston, which is driven by a permanent magnet linear electric motor to...
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5718248 |
Muscle energy converter pump and method of pumping fluid of a patient
A muscle energy converter pump. The muscle energy converter is comprised of a piston having an attachment head for connection to a muscle. The muscle energy converter also comprises a cylinder...
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5716318 |
Method of treating cardiac arrest and apparatus for same
A method of treating a subject in cardiac arrest comprises the steps of blocking the descending aorta of the subject and perfusing the aortic arch of the subject with a protective solution in an...
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5711753 |
Blood pump device and method of pumping blood
The present invention pertains to a blood pump device which comprises a blood pump having blood transport ports and cannulae connected to the ports. The blood pump device also comprises a coating...
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5704891 |
Electrohydraulic ventricular assist device
A unified system for implantation in the thorax and for cannulation to the blood circulatory system comprises an electronic controller for generating an actuating signal and an energy convertor for...
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RE35707 |
Apparatus for driving medical appliances
A self-propelled wheelchair type artificial heart driving apparatus for giving freedom of movement to those patients who require an auxiliary artificial heart. Various safety devices are provided...
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5693000 |
Cardiomyoplasty simulator with feedback control
A cardiomyoplastic muscle is stimulated electronically using a closed loop control system. As part of the system, a signal sensed the muscle which is characteristic of its condition. If this signal...
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