David M Burke

6991595, Jan 31, 2006

Apr 19, 2002

10/125943

David J. Burke - Concord MA, US
Douglas C. Thomas - Carmichael CA, US

Thoratec Corporation - Pleasanton CA

A61M 1/12

600 17, 623 328

A blood pump may be adapted to sense the onset of left ventricular collapse by monitoring a pulsatility index, and may adjust the pump speed to maintain the index at a setpoint. The pulsatility index may be measured by the amount of difference between the maximum and the minimum volume of flow through the pump during a particular time period. The setpoint may be increased when the onset of ventricular collapse is detected, for example, when the pulsatility index falls suddenly. The setpoint may be decreased incrementally when the onset of ventricular collapse has not been detected for a period of time, such as for a particular period of time since the last detection of the onset of ventricular collapse.

20120022645, Jan 26, 2012

Jul 22, 2011

13/188510

David J. Burke - Concord MA, US

Thoratec Corporation - Pleasanton CA

A61M 1/10

623 313

A blood pump controller includes a microcontroller and a communication interface. The microcontroller is configured to communicate with various types of blood pump communication modules. The microcontroller is further configured to determine, based on communication with a particular type of blood pump communication module, the particular type of blood pump communication module communicated with. The microcontroller is further configured to select, based on the determination of the particular type of blood pump communication module, control logic used to control the particular type of blood pump communication module. The microcontroller is further configured to generate, based on the selected control logic, commands for controlling the blood pump communication module. The communication interface is configured to connect the microcontroller to the particular type of blood pump communication module.

20120078031, Mar 29, 2012

Sep 23, 2011

13/242248

David J. Burke - Concord MA, US
Kevin Bourque - Reading MA, US

A61M 1/10

600 16

In one general aspect, a method includes measuring blood flow through a right rotary blood pump, measuring blood flow through a left rotary blood pump, and controlling a speed of one of the rotary blood pumps using a controller that calculates the speed of one of the rotary blood pumps based on the measured blood flow through the other rotary blood pump.

20220196823, Jun 23, 2022

Oct 10, 2018

16/156411

- Cambridge MA, US
David Burke - Boston MA, US

G01S 13/53
G01S 13/524
G01S 7/292
G01S 7/41

A phase Doppler radar system may comprise a pulse Doppler receiver/transmitter (R/T) subsystem coupled with a processing subsystem. The system may determine target velocity and target detection events by collecting pulses from the pulse Doppler R/T subsystem, determine an undifferentiated phase of each of the pulses, differentiate the pulses, and determine a differentiated phase of each of the pulses. The system may perform a linear fit of the differentiated phases of the pulses to produce a slope and an intercept. The system may determine a set of initial estimates of coefficients of a nonlinear fit equation. The system may perform iterations of a nonlinear least squares fit, beginning with the initial coefficient estimates, to produce a non-linear fit result. The system may determine a goodness-of-fit (GoF) statistic associated with the nonlinear fit result, and declare a detection event when the GoF is superior to a GoF statistic associated Gaussian noise.

20150250936, Sep 10, 2015

May 21, 2015

14/719045

- Pleasanton CA, US
David J. Burke - Concord MA, US
Steven H. Reichenbach - Pleasanton CA, US
Bryce A. Stammerjohan - San Francisco CA, US
Thomas C. Rintoul - Gold River CA, US

A61M 1/12
A61M 1/10

This document relates to continuity monitoring of electrical conductors. For example, materials and methods for continuity monitoring of conductors for use providing power to a blood pump (e.g., an assist device) are provided.

20140324165, Oct 30, 2014

Jul 16, 2014

14/223029

- Pleasanton CA, US
David J. Burke - Concord MA, US

THORATEC CORPORATION - Pleasanton CA

A61M 1/10

623 327

A blood pump controller includes a microcontroller and a communication interface. The microcontroller is configured to communicate with various types of blood pump communication modules. The microcontroller is further configured to determine, based on communication with a particular type of blood pump communication module, the particular type of blood pump communication module communicated with. The microcontroller is further configured to select, based on the determination of the particular type of blood pump communication module, control logic used to control the particular type of blood pump communication module. The microcontroller is further configured to generate, based on the selected control logic, commands for controlling the blood pump communication module. The communication interface is configured to connect the microcontroller to the particular type of blood pump communication module.