1
Rodney W Salo, Brian D Pederson: Dimension sensitive angioplasty catheter. Cardiac Pacemakers, Orrin M Haugen, Thomas J Nikolai, May 13, 1986: US04587975 (347 worldwide citation)

An improved dilation catheter for use in the conduct of transluminal angioplasty techniques whereby measurements may be taken to determine patency during the course of the procedure. The catheter comprises an elongated tubular member having an inelastic expander member proximate its distal end. The ...


2
John A Hauck, Brian D Pederson: Dual indifferent electrode pacemaker. Cardiac Pacemakers, Haugen and Nikolai, February 8, 1994: US05284136 (270 worldwide citation)

An endocardial lead having first and second spaced apart electrodes resides in a patient's heart. The first electrode is a sensing electrode and the second electrode is a carrier signal driving electrode. The lead has a conductor coupling a source of alternating current carrier signals of a predeter ...


3
Rodney W Salo, Brian D Pederson: Biomedical method and apparatus for controlling the administration of therapy to a patient in response to changes in physiologic demand. Cardiac Pacemakers, Orrin M Haugen, Thomas J Nikolai, August 18, 1987: US04686987 (243 worldwide citation)

A biomedical apparatus capable of sensing changes in the heart's ventricular volume or stroke volume and then changing the operating performance of the device in a fashion as a function of stroke volume. A relatively low frequency signal (under 5 KHz) is applied between spaced electrodes disposed in ...


4
Rodney W Salo, Brian D Pederson: Biomedical method and apparatus for controlling the administration of therapy to a patient in response to changes in physiological demand. Cardiac Pacemakers, Haugen and Nikolai, March 2, 1993: US05190035 (193 worldwide citation)

A biomedical apparatus capable of sensing changes in the heart's ventricular volume or stroke volume and then changing the operating performance of the device in a fashion as a function of stroke volume. A relatively low frequency signal (under 5 KHz) is applied between spaced electrodes disposed in ...


5
John A Hauck, Brian D Pederson: Variable rate cardiac pacer. Cardiac Pacemakers, Haugen and Nikolai, August 6, 1991: US05036849 (163 worldwide citation)

An endocardial lead having first and second spaced apart electrodes resides in a patient's heart. The first electrode is a sensing electrode and the second electrode is a carrier signal driving electrode. The lead has a conductor coupling a source of alternating current carrier signals of a predeter ...


6
Ronald W Heil Jr, Robert C Owens, Brian D Pederson: Cardiac electrode with drug delivery capabilities. Cardiac Pacemakers, Orrin M Haugen, Thomas J Nikolai, Frederick W Niebuhr, April 11, 1989: US04819662 (153 worldwide citation)

An implantable cardiac pacing lead includes a porous, platinum electrode, a flexible electrically conductive coil, and a crimp tube coupling the electrode to the distal end of the coil. A recess in the crimp tube, open to the electrode at the crimp tube distal end, houses a matrix impregnated with a ...


7
Brian P Citak, Michael W Dooley, Arthur L Olive, Brian D Pederson, Renold J Russie, Rodney W Salo, William L Zimmer: Physiologic control of pacemaker rate using pre-ejection interval as the controlling parameter. Cardiac Pacemakers, Orrin M Haugen, Thomas J Nikolai, Frederick W Niebuhr, September 27, 1988: US04773401 (126 worldwide citation)

A multi-pole pacing/sensing lead is used to measure the instantaneous impedance in the right ventricle of a patient's heart. The resulting impedance waveform is signal processed to obtain a measure of the time interval beginning with the occurrence of a paced beat or a spontaneous QRS complex (systo ...


8
Brian D Pederson, Rodney W Salo: Method for matching the sense length of an impedance measuring catheter to a ventricular chamber. Cardiac Pacemakers, Haugen and Nikolai, March 27, 1990: US04911174 (103 worldwide citation)

A method for matching the distance spanned by a plurality of surface electrodes on an impedance measuring catheter to the size of a ventricular chamber to be measured is disclosed. The catheter includes a plurality of longitudinally spaced electrodes extending from its distal end and spanning a dist ...


9
Brian D Pederson, Rodney W Salo: Variation in cardiac chamber volume or pressure as a controlling parameter. Cardiac Pacemakers, Haugen and Nikolai, February 21, 1995: US05391190 (98 worldwide citation)

A rate adaptive cardiac pacer is described in which the impedance versus time information derived using impedance plethysmography or the pressure versus time information derived from a pressure transducer in a ventricular chamber is signal processed to recover a modulating envelope due to volume or ...


10
Brian D Pederson, Rodney W Salo: Variation in cardiac chamber volume or pressure as a controlling parameter. Cardiac Pacemakers, Haugen and Nikolai, August 11, 1992: US05137019 (84 worldwide citation)

A rate adaptive cardiac pacer is described in which the impedance versus time information derived using impedance plethysmography or the pressure versus time information derived from a pressure transducer in a ventricular chamber is signal processed to recover a modulating envelope due to volume or ...