Thoratec Corporation

Other

Ventrassist Pty Ltd.

The University of New South Wales

University of Technology

Northern Development As

Peter Joseph Ayre

John Campbell Woodard

Peter Andrew Watterson

Geoffrey Douglas Tansley

Nicholas Oliver Von Huben

Lee Thomas Glanzmann

Thomas Julius Borody

John Begg

Colin Neville Sutton

Peter Andrew Crosby

Minh Lee

Peter Stephenson

Mark R Kitson

Anthony Philip Alder

John Donald Begg

A percutaneous lead assembly for an active implantable device, the lead assembly comprising a sheath with a plurality of wires extending from a proximal end to a distal end. The wires being adapted to power the active implantable device; the distal end having at least one electrode fixed thereon. The electrodes being in communication with sensor electronics and wherein at least one electrode is on the outer layer of the lead assembly in which the electrode is used to detect at least one of acceleration and electrical signals of an organ.

Percutaneous lead

The present invention generally relates to a control system for a rotary blood pump adapted to move blood in a patient. The control system comprises a means for measuring and varying the speed of the pump and a means for measuring the pulsatility index of a patient, and the control system is adapted to maintain the pulsatility index at or near a predetermined value by varying the speed of the pump. The pulsatility index is derived from the amplitude of the actual pump speed over a predetermined time period. Optionally, also, the control system can calculate the second derivative of instantaneous speed of the rotary blood pump and use the calculation of the second derivative of instantaneous speed to detect a suction event, and help prevent it.

Control systems for rotary blood pumps

A blood pump including an ultrasonic sensor mounted in or on a blood contacting surface of the blood pump. The ultrasonic sensor measures blood velocity and reports information to a blood pump controller. The ultrasonic sensor is directed to measure blood velocity in an inflow cannula connected to the blood pump.

Blood pump with an ultrasound transducer

A pump assembly and estimation and control system therefor, the pump adapted for continuous flow pumping of blood. In a particular form, the pump is a centrifugal pump wherein the impeller is entirely sealed within the pump housing and is exclusively hydrodynamically suspended therein against movement in three translational and two rotational degrees of freedom as the impeller rotates within the fluid urged by electromagnetic means external to the pump cavity. Hydrodynamic suspension is assisted by the impeller having deformities therein such as blades with surfaces tapered from the leading edges to the trailing edges of bottom and top surfaces thereof.

Rotary blood pump and control system therefor

A demand responsive physiological control system for use with a rotary blood pump; said system including a pump controller which is capable of controlling pump speed of said pump; said system further including a physiological controller, and wherein said physiological controller is adapted to analyse input data relating to physiological condition of a user of said pump; and wherein said physiological controller determines appropriate pumping speed and sends a speed control signal to said pump controller to adjust pump speed; said system further including a physiological state detector which provides said input data indicative of at least one physiological state of said user, in use, to said physiological controller.

Physiological demand responsive control system

A method of tuning a DC brushless motor, wherein measurement of back EMF voltage is used to detect changes in the torque requirements caused by variation in the operating conditions of the DC brushless motor, the method including varying the timing of the driving signals to the motor to compensate for the changes in the torque requirements.

Tuning DC brushless motors

Medical device controller

A self-advancing endoscope (,) comprising an elongated flexible tubular member (,) and an elongated channel (,) defined by the tubular member (,) and having a distal end wall (,). Piston means (,) are slideably disposed in the channel (,) toward the distal end wall (,). The endoscope (,) also comprises means (,) for reciprocating the piston means (,) such that the piston means (,) impacts the distal end wall (,) on an advancing stroke.

Self-advancing endoscope

A method and apparatus for a flyback control circuit wherein primary coil current is minimized during flyback operation such that the spark duration and energy delivered to the spark gap are maximized.

Growing community of inventors

Crows Nest, Australia

Peter Joseph Ayre