1
Donald M Cohen, James E Barcel, Michael D Hooven: Implantable blood oxygen sensor and method of use. Siemens Pacesetter, Bryant R Gold, Leslie S Miller, March 28, 1989: US04815469 (404 worldwide citation)

An implantable medical sensor (42) determines the oxygen content of blood. The sensor includes a miniaturized hybrid circuit (130) that includes light-emitting diode means (32), phototransistor means (34, 36), and a substrate (110) to which the light-emitting diode means and phototransistor means ar ...


2
Todd J Sheldon: Medical service employing multiple DC accelerometers for patient activity and posture sensing and method. Medtronic, Reed A Duthler, Harold R Patton, January 14, 1997: US05593431 (374 worldwide citation)

A method of and apparatus for determining the physical posture of a patient's body, having a superior-inferior body axis, an anterior-posterior body axis and a lateral-medial body axis, in relation to earth's gravitational field. A medical device having first, second and, optionally, third DC accele ...


3
Brian M Mann, John W Poore: Microprocessor controlled rate-responsive pacemaker having automatic rate response threshold adjustment. Siemens Pacesetter, Leslie S Miller, Bryant R Gold, Lisa P Weinberg, July 10, 1990: US04940052 (317 worldwide citation)

A rate-responsive pacemaker which includes a conventional programmable pulse generator, a physiological sensor, and a processor is disclosed which generates heart stimulation pulses on demand, or as otherwise programmed, as controlled by a rate control signal which is derived from the physiological ...


4
Walter H Olson: Dual chamber rate responsive pacemaker with automatic mode switching. Medtronic, Harold R Patton, John A Rissman, Greg P Gadson, September 8, 1992: US05144949 (194 worldwide citation)

A dual chamber rate responsive pacemaker with automatic mode switching between the DDD mode, the VVIR mode, and the DDIR mode, based on the difference between the average sensor rate and the average atrial rate. The primary pacing mode of operation is DDD, unless that mode is contraindicated by too ...


5
Tommy D Bennett, Lucy M Nichols: Rate responsive pacemaker and methods for optimizing its operation. Medtronic, John A Rissman, Harold R Patton, October 27, 1992: US05158078 (188 worldwide citation)

A rate responsive cardiac pacemaker for providing an optimized pacing rate of stimulation pulses as a function of at least one selected rate control parameter. Each rate control parameter has a value which varies as a function of changes in a patient's physiologic demand an includes a sensor system ...


6
Lawrence J Stotts, Edward A Schroeppel: Rate responsive cardiac pacemaker with peak impedance detection for rate control. Sulzer Intermedics, John R Merkling, July 21, 1998: US05782884 (172 worldwide citation)

An implantable, rate responsive pacemaker, sensitive to impedance changes in the heart, wherein the cardiac pacing rate and maximum cardiac pacing rate, or either of them, are adjusted as a function of an interval between either the administration of a pacing pulse or the detection of the R-wave and ...


7
Charles G Yerich, William J Combs, Karen J Kleckner, Eric J Panken, Richard S Schallhorn, John D Wahlstrand: Method and apparatus for rate-responsive cardiac pacing. Medtronic, Michael B Atlass, Harold R Patton, October 8, 1996: US05562711 (159 worldwide citation)

A body-implantable rate-responsive cardiac pacemaker is provided with circuitry for sensing a plurality of physiologic parameters known to be indicative of a patient's metabolic demand for increased cardiac output. In one embodiment, a rate-responsive pacemaker is provided with an activity sensor fo ...


8
Gene A Bornzin, Elia R Arambula, Joseph J Florio: System and method for automatically determining the slope of a transfer function for a rate-responsive cardiac pacemaker. Pacesetter, Lisa P Weinberg, May 7, 1996: US05514162 (147 worldwide citation)

A rate-responsive pacemaker measures a patient's level of activity and stores the results in an activity level histogram. The patient's average level of activity is maintained as a running average. Based on a prescribed base pacing rate, a prescribed maximum pacing rate, the average level of activit ...


9
Jason A Sholder: Rate-responsive pacemaker having digital motion sensor. Siemens Pacesetter, Bryant R Gold, September 20, 1988: US04771780 (145 worldwide citation)

A rate-responsive pacemaker includes a motion sensor mounted therein. The output signal from the motion sensor is a digital signal that can be connected directly to the digital processing and control circuits of the pacemaker in order to adjust its basic pacing rate as a function of the physical mot ...


10
Walter H Olson: Methods for measurement of arterial blood flow. Medtronic, Reed A Duthler, Harold R Patton, April 25, 1995: US05409009 (143 worldwide citation)

A sensor for measurement of one or more parameters of arterial blood flow, located on a transvenously inserted lead. The sensor may be inserted into a vein that is anatomically adjacent to the artery in which blood flow parameters are to be monitored, rather than into the artery itself. The sensor m ...