1
Tibor A Nappholz, Mark Lubin, Harry L Valenta Jr: Metabolic-demand pacemaker and method of using the same to determine minute volume. Telectronics, Gottlieb Rackman & Reisman, October 27, 1987: US04702253 (226 worldwide citation)

A metabolic-demand pacemaker in which the standby rate is a function of minute volume. Electrodes are placed in a blood vessel in the vicinity of the patient's pleural cavity, a known current field is established in the blood, and the impedance in the field is measured. The impedance is a function o ...


2
Tibor A Nappholz, Harry L Valenta Jr, Steven M Maas, Ken Koestner: Method and apparatus for chronically monitoring the hemodynamic state of a patient using doppler ultrasound. Telectronics Pacing Systems, Gottlieb Rackman & Reisman, February 23, 1993: US05188106 (212 worldwide citation)

A hemodynamic control apparatus and method for regulating blood flow within the cardiovascular system in a closed-loop control system using ultrasound measurement techniques to determine a hemodynamic status of the patient and to derive a control parameter for modulating the hemodynamics of the syst ...


3
Stephen D Walker, John E Repine, Charles W Henry, Harry L Valenta Jr, Peter E Nelson, R Dale Zellers: Noninvasive optical sensor for measuring near infrared light absorbing analytes. Nostix, Ken J Koestner, Koestner Bertani, October 12, 2004: US06802812 (117 worldwide citation)

An optical sensor includes an optical source capable of being positioned on a tissue and emitting near infrared light into the tissue at a plurality of selected wavelengths, and a photodetector capable of detecting reflected light from the tissue. The photodetector being positioned on the tissue rem ...


4
Ken Koestner, Tibor A Nappholz, Harry L Valenta Jr, Steven M Maas: Method and apparatus for controlling the hemodynamic state of a patient based on systolic time interval measurements detecting using doppler ultrasound techniques. Telectronics Pacing Systems, Gottlieb Rackman & Reisman, August 18, 1992: US05139020 (98 worldwide citation)

A hemodynamic control apparatus and method for regulating blood flow within the cardiovascular system in a closed-loop control system using ultrasound measurement techniques and intracardiac electrogram sensing to determine a hemodynamic status of the patient and to derive a control parameter for mo ...


5
Tibor A Nappholz, Ken Koestner, Harry L Valenta Jr: Apparatus and method for detecting abnormal cardiac rhythms using an ultrasound sensor in an arrhythmia control system. Telectronics Pacing Systems, Gottlieb Rackman & Reisman, February 2, 1993: US05183040 (88 worldwide citation)

An antitachycardia pacer and pacing method automatically monitors and supports a patient's hemodynamic status by measuring cardiac output using an ultrasonic sensor. By analyzing cardiac output, the pacer determines whether the heart is beating normally or under conditions of exercise, bradycardia, ...


6
Harry L Valenta Jr, Tibor A Nappholz: Monitoring the hemodynamic state of a patient from measurements of myocardial contractility using doppler ultrasound techniques. Telectronics Pacing Systems, Gottlieb Rackman & Reisman, October 20, 1992: US05156154 (80 worldwide citation)

A hemodynamic control apparatus and method for regulating blood flow within the cardiovascular system in a closed-loop control system using ultrasound measurement techniques to determine a hemodynamic sttus of the patient and to derive a control parameter for modulating the hemodynamics of the syste ...


7
Harry L Valenta Jr, Tibor A Nappholz: Catheter-mounted doppler ultrasound transducer and signal processor. Telectronics Pacing Systems, Gottlieb Rackman & Reisman, October 20, 1992: US05156157 (78 worldwide citation)

A Doppler ultrasound transducer and interconnected high frequency signal processing circuit, adapted for operative coupling on a distal portion of an intravascular catheter, for ultrasonically sensing high frequency signals representative of blood flow within a patient's cardiovascular system, proce ...


8
Harry L Valenta Jr, Joseph M Probst: Implantable energy management system and method. Wilson Greatbatch Technologies, Hodgson Russ, December 19, 2006: US07151378 (3 worldwide citation)

An implantable energy supply system having at least two cells is disclosed. The system may have a switch with a first state in which the cells are electrically connected to a load, and a second state in which each cell is electrically connected with its own charger. A measurer may be electrically co ...