Nupulse, Inc.

L-vad Technology, Inc.

Delphi Technologies, Inc.

Paul G DeDecker

Robert M Smith

Roger William Snyder

Valluvan Jeevanandam

Paul S Freed

Loren Mitchell Thompson

Michael Psakhis

James Edward Nelson

Adrian Kantrowitz

David Alan Ross

Michael P Chekal

A pump system has a rotatory shaft and a rotatory drive arrangement coupled to the rotatory shaft for applying rotatory energy thereto. First through fourth pump arrangements are coupled to the rotatory shaft, each pump arrangement pumping a pulse of air during each rotation of the rotatory shaft, the first, second, third, and fourth pump arrangements pumping a corresponding pulse of air sequentially during each rotation of the rotatory shaft. The rotatory shaft has a first and second ends, and a central region therebetween where an electric motor is coaxially arranged. The first and third pump arrangements are coupled to the first end of the rotatory shaft, and the second and fourth pump arrangements are coupled to the second end of the rotatory shaft. Angularly displaced eccentric couplers couple the pump arrangements to the respective ends of the rotatory shaft.

Method of producing air for ventricular assist system

A skin interface device ('SID') for a cardiac assist device, including a SID cap having a first housing, an annular sleeve, and a first annular winding disposed over said annular sleeve. The SID further includes a SID base having a second housing formed to include a tubular portion, a cylindrical member disposed in said tubular portion, and a second annular winding disposed around said cylindrical member. The SID cap is configured to be rotationally attached to said SID base. When the SID cap is attached to the SID base, the second annular winding is disposed within the first annular winding, and the relative positions of the first annular winding and the second annular winding are fixed both laterally and vertically.

Skin interface device for cardiac assist device

Devices and methods are disclosed for implanting, positioning, removing, replacing and operating intra-aortic balloon pumps.

Intra-aortic balloon pump assembly for ventricular assist device

Internal drive line for ventricular assist device

Air supply mechanism for ventricular assist system

Skin interface for ventricular assist device

Ventricular assist device

A drive unit to control the peak pressure of air for the inflation of a left ventricular assist system is disclosed. The control of the peak pressure can address the problem of the 'kick' experienced by patients when the peak inflation pressure reaches approximately 200 mm Hg. The peak pressure of the air released for the inflation cycle of the system is reduced either by the reduction of the inner diameter of the interconnect line running from the compression tank to the valve manifold or the use of a multi-valve manifold with independently controlled valves and an electronic controller to selectively open and close the valves of the manifold. Either technique, whether used alone or in combination, reduces the peak pressure of the air released for the inflation cycle to below the levels associated with the 'kick,' while still meeting the operating specifications to properly inflate and deflate the system's blood pump.

Controlled inflation of a pneumatic L-VAD

Intra-aortic balloon pump and driver

A method of determining the purity of oxygen present in an oxygen-enriched gas produced from an oxygen delivery system is disclosed. The oxygen delivery system includes at least one sieve bed having a nitrogen-adsorbing material disposed therein and configured to adsorb nitrogen from a feed gas introduced into the at least two sieve beds via a pressure-swing adsorption cycle. The method includes determining a quantity of nitrogen adsorbed by the nitrogen-adsorbing material by inferring an effective volume of the at least one sieve bed based on a pressure change of the at least one sieve bed.

Method of determining the purity of oxygen present in an oxygen-enriched gas produced from an oxygen delivery system

A flow meter for measuring a flow rate of a flow of a fluid includes a housing member including a first section configured to matingly couple with a second section. The flow meter further includes an integrally formed laminar flow member removably held within at least a portion of the first section of the housing member. The laminar flow member includes a body and a plurality of channels integrally formed within the body, wherein each of the plurality of channels is substantially continuous in the longitudinal direction and substantially continuous in the transverse direction.

Flow meter for measuring a flow rate of a flow of a fluid

An apparatus and method for assisting cardiac function of a patient includes a flaccid inflatable chamber held at a predetermined volume generally midway between fully inflated and fully deflated for performing a periodically scheduled patient monitoring routine for measuring values of the physiology of the patient, and reinflating the chamber after either detecting a dicrotic notch or expiration of a measurement time period window, whichever occurs first. A software program is connectible in electronic communication with the control program for adjusting settings of the drive unit. The software program is capable of one or more of the following functions: retrieving current values of physician programmable parameters, selectively retrieving a history of the drive unit operation including error detection records, displaying a continuous ECG, and/or displaying a single-beat sample of aortic pressure waveform obtained in real time from the patient.

Cardiovascular support control system

An apparatus for assisting cardiac function of a patient includes an inflatable chamber operably positionable with respect to an aorta of the patient, a percutaneous access device implantable with respect to a hypogastric region of the patient and connectible in fluid communication with the inflatable chamber, and a drive unit connectible through the percutaneous access device for selectively inflating and deflating the inflatable chamber in accordance with a control program stored in memory. The control program controls the drive unit in response to a periodically scheduled patient monitoring routine for measuring values of the physiology of the patient. The control program uses measured values as modified in accordance with the control program and physician programmable parameters for assisting cardiac function of the patient. The program includes the steps of automatically controlling the drive unit in response to a periodically scheduled patient monitoring routine for measuring values of physiology of the patient, and using measured values as modified in accordance with physician programmable parameters for assisting cardiac function of the patient. A software program is connectible in electronic communication with the control program for adjusting settings of the drive unit. The software program is capable of one or more of the following functions: retrieving current values of physician programmable parameters, selectively retrieving a history of the drive unit operation including error detection records, displaying a continuous ECG, and/or displaying a single-beat sample of aortic pressure waveform obtained in real time from the patient.

An apparatus for measuring flow rate and controlling delivered volume of fluid flow in a fluid conduit is disclosed including a valve having a fixed aperture disposed in the fluid conduit for selectively opening and closing the aperture between an open position and a closed position. The valve is selectively closed when a predetermined volume has passed through the valve. Differential pressure is measured across the valve and the differential pressure is accumulated with respect to time to provide a value corresponding to volume of fluid flow passing through the valve when in the open position. A method for measuring flow rate and controlling delivered volume of fluid flow through a fluid conduit includes the steps of selectively opening and closing a valve having a fixed aperture disposed in the fluid conduit between an open position and a closed position, measuring a differential pressure between a first pressure on an upstream side of the valve and a second pressure on a downstream side of the valve, and when the valve is in the open position, accumulating the differential pressure with respect to time to obtain a value corresponding to volume of fluid flow passing through the valve.

Growing community of inventors

Clinton Township, MI, United States of America

Paul G DeDecker