1
Nathan A Torgerson, Jean E Prather, John W Forsberg, Curtis D Kinghorn: Portable stimulation screening device for screening therapeutic effect of electrical stimulation on a patient user during normal activities of the patient user. Medtronic, Banner & Witcoff, April 13, 1999: US05893883 (258 worldwide citation)

A stimulation device for screening therapeutic effects from electrical stimulation of electrically excitable tissue. The stimulation device includes inputs such that the user can easily select the polarity, amplitude, pulse width, and pulse rate of the respective stimulation signal applied on each o ...


2
Nathan A Torgerson, James E Riekels: Power management for an implantable medical device. Medtronic, Banner & Witcoff, September 17, 2002: US06453198 (144 worldwide citation)

A power management system and technique to manage and allocate the energy provided to various components of an implanted device during periods of low energy. The power management system includes an implantable power source delivering energy to various components within the implantable medical device ...


3
Michael T Lee, Steven M Goetz, Nathan A Torgerson: Identifying combinations of electrodes for neurostimulation therapy. Medtronic, Shumaker & Sieffert PA, December 9, 2008: US07463928 (138 worldwide citation)

A programmer allows a clinician to identify combinations of electrodes from within an electrode set implanted in a patient that enable delivery of desirable neurostimulation therapy by an implantable medical device. The programmer executes an electrode combination search algorithm to select combinat ...


4
Steven M Goetz, Andrew H Houchins, Jeffrey T Keacher, Gary W King, Kenneth T Heruth, Roy L Testerman, Michael T Lee, Nathan A Torgerson, Joseph J Nolan: Shifting between electrode combinations in electrical stimulation device. Medtronic, Shumaker & Sieffert P A, April 14, 2009: US07519431 (131 worldwide citation)

The disclosure is directed to techniques for shifting between two electrode combinations. An amplitude of a first electrode combination is incrementally decreased while an amplitude of a second, or subsequent, electrode combination is concurrently incrementally increased. Alternatively, an amplitude ...


5
Nathan A Torgerson, Raymond F McMullen: Implantable non-invasive rate-adjustable pump. Medtronic, Arnold White & Durkee, October 13, 1998: US05820589 (129 worldwide citation)

In accordance with the present invention, an implantable pump is programmed non-invasively by means of a programmer that communicates flow rate information by means of radio frequency telemetry or other methods of non-invasive telemetry. The programmer also supplies power to the implantable pump dur ...


6
Robert Leinders, Nathan A Torgerson, Marc Stein, Todd P Goblish, Todd D Heathershaw, John Delfin Rodriguez: Independent therapy programs in an implantable medical device. Medtronic, Shumaker & Sieffert PA, August 30, 2005: US06937891 (98 worldwide citation)

Apparatus and method for independently delivering a plurality of therapy programs in an implantable medical device. A therapy controller configures the device to generate independent pulse trains associated with a plurality of therapy programs and dynamically configures the electrodes to deliver the ...


7
Nathan A Torgerson, John J Grevious, Steven L Jensen, John W Forsberg, Robert Leinders, Raymond F McMullen: Apparatus and method for allowing immediate retrieval for information and identification from an implantable medical device having a depleted power source. Medtronic, Banner & Witcoff, September 24, 2002: US06456883 (97 worldwide citation)

An apparatus and method that will allow for external communication, via an external programmer, for positive device identification and for retrieval of device or patient information stored by an implantable medical device with a depleted power source. The external programmer will deliver energy to a ...


8
John Delfin Rodriguez, Nathan A Torgerson, Marc Stein, Steven L Jensen: Wave shaping for an implantable medical device. Medtronic, Shumaker & Sieffert P A, Steven J Shumaker, Stephen W Bauer, September 27, 2005: US06950706 (87 worldwide citation)

In the embodiment of the invention, apparatus and method provide flexibility in generating a stimulation waveform (that comprises at least a stimulation pulse) to an electrode of an Implantable Neuro Stimulator (INS). The waveform is synthesized for each rate period interval. A portion of the rate p ...


9
Michael T Lee, Steven M Goetz, Nathan A Torgerson: Generation of therapy programs and program groups. Medtronic, Shumaker & Sieffert P A, November 2, 2010: US07826901 (86 worldwide citation)

A programmer allows a clinician to identify desirable combinations of electrodes from within an electrode set implanted in a patient that enable delivery of desirable neurostimulation therapy by an implantable medical device. The clinician may create neurostimulation therapy programs that include id ...


10
Steven M Goetz, Nathan A Torgerson, Michael T Lee: Distributed lead functionality testing. Medtronic, Shumaker & Sieffert PA, November 24, 2009: US07623919 (75 worldwide citation)

Techniques for performing lead functionality tests, e.g., lead impedance tests, for implantable electrical leads are described. In some of the described embodiments, an implantable medical device determines whether a patient is in a target activity state, e.g., an activity state in which lead impeda ...