Patents by Inventor Nathan A. Torgerson

Nathan A. Torgerson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9238135
    Abstract: Method, controller and system for an implantable medical device having a plurality of electrodes, the implantable medical device capable of delivering therapeutic stimulation to a patient, comprising a control module, a user interface operatively coupled to the control module, the user interface providing control of the control module by a medical professional or other user, and an electrode interface operatively coupled between the plurality of electrodes and the control module. The control module uses the electrode interface to obtain a plurality of measurements of impedance values for a plurality of selected pairs of individual ones of the plurality of electrodes. The control module flags electrodes using the plurality of measurements of impedance values of the selected pairs of individual ones of the plurality of electrodes comparative to a range, and the delivery of therapy on flagged electrodes is inhibited.
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: January 19, 2016
    Assignee: Medtronic, Inc.
    Inventors: Steven M. Goetz, Todd V. Smith, Nathan A. Torgerson, Warren W. Ball
  • Patent number: 9186517
    Abstract: 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 combinations of electrodes to test in a non-random order. According to algorithms consistent with the invention, the programmer may first identify a position of a first cathode for subsequent combinations, and then select electrodes from the set to test with the first cathode as anodes or additional cathodes based on the proximity of the electrodes to the first cathode. The programmer may store information for each combination tested, and the information may facilitate the identification of desirable electrode combinations by the clinician. The clinician may create neurostimulation therapy programs that include identified desirable program combinations.
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: November 17, 2015
    Assignee: Medtronic, Inc.
    Inventors: Michael T. Lee, Steven M. Goetz, Nathan A. Torgerson
  • Publication number: 20150306404
    Abstract: An external device transfers a key to an implantable medical device over a proximity communication and then establishes a first far field communication session with the implantable medical device where the key is used for the first communication session. This first communication session may occur before implantation while the implantable medical device is positioned outside of the sterile field so that using a proximity communication is easily achieved. Once the implantable medical device is passed into the sterile field for implantation, the external device may then establish a second far field communication session with the implantable medical device where the last key that was used for the first communication session is again used for the second communication session which avoids the need for another proximity communication to occur within the sterile field.
    Type: Application
    Filed: April 23, 2015
    Publication date: October 29, 2015
    Inventors: Warren W. Ball, Ajinkya M. Joglekar, Nathan A. Torgerson, Matthew L. Plante
  • Publication number: 20150224317
    Abstract: Techniques are described for generating electrical stimulation current pulses for delivery of electrical stimulation therapy via a current-controlled system that emulates voltage pulses generated via a voltage-controlled system.
    Type: Application
    Filed: April 24, 2015
    Publication date: August 13, 2015
    Inventor: Nathan A. Torgerson
  • Patent number: 9056206
    Abstract: A medical electrical stimulator provides selective control of stimulation via a combination of two or more electrodes coupled to respective regulated current paths and one or more electrodes coupled to unregulated current paths. Constant current sources may control the current that is sourced or sunk via respective regulated current paths. An unregulated current path may sink or source current to and from an unregulated voltage source that serves as a reference voltage. Unregulated electrodes may function as unregulated anodes to source current from a reference voltage or unregulated cathodes to sink current to a reference voltage.
    Type: Grant
    Filed: October 14, 2009
    Date of Patent: June 16, 2015
    Assignee: Medtronic, Inc.
    Inventors: Nathan A. Torgerson, Matthew J. Michaels, Shane A. Self, Todd D. Heathershaw
  • Publication number: 20150157869
    Abstract: Method of recharging a power source such as a rechargeable lithium ion battery for an implantable medical device. Energy is received within the implantable medical device from an external energy source which energy is used to recharge the power source. At least one recharge parameter associated with recharging of the power source is monitored. Recharging is regulated by increasing a charging rate of the power source in response, at least in part, on the recharge parameter being monitored.
    Type: Application
    Filed: February 16, 2015
    Publication date: June 11, 2015
    Inventors: Nathan A. Torgerson, James E. Riekels
  • Patent number: 9020589
    Abstract: Techniques are described for generating electrical stimulation current pulses for delivery of electrical stimulation therapy via a current-controlled system that emulates voltage pulses generated via a voltage-controlled system.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: April 28, 2015
    Assignee: Medtronic, Inc.
    Inventor: Nathan A. Torgerson
  • Patent number: 8995949
    Abstract: Devices and systems provide for proximity based selection of an implantable medical device for far field communication with an external device. By using a proximity communication that is limited to the IMD of interest during the selection process, the external device can eliminate those IMDs that are in range of far field communications but are able to receive the proximity communication. Thus, information may be shared via a proximity communication that is validated via a far field communication, or shared via a far field communication as a challenge and then validated via a proximity communication. The proximity communication may be used to initially limit the number of devices that respond to a discovery request and then subsequently used to select the intended implantable medical device as well as automatically select the appropriate therapy application corresponding to the selected IMD.
    Type: Grant
    Filed: January 3, 2014
    Date of Patent: March 31, 2015
    Assignee: Medtronic, Inc.
    Inventors: Earle T. Roberts, Donald L. Villalta, David S. Slack, Irfan Z. Ali, Sudheendhar Raghavendran, Nathan A. Torgerson, Garrett R. Sipple
  • Patent number: 8996123
    Abstract: Various programming techniques are described for medical devices that deliver electrical stimulation therapy that may include mapping between discrete electrical stimulation parameters and a graphical view of the electrical stimulation representing a stimulation zone generated by the parameters. In one example, a method includes receiving, via a programmer for an electrical stimulator, user input that graphically manipulates at least one of size and a shape of a graphical representation of at least one electrical stimulation zone displayed on the programmer, and defining a program to control delivery of electrical stimulation therapy based on the user input.
    Type: Grant
    Filed: October 18, 2010
    Date of Patent: March 31, 2015
    Assignee: Medtronic, Inc.
    Inventors: Steven M. Goetz, Jon P. Davis, Nathan A. Torgerson, Shyam Gokaldas, Ashish Singal, Rajeev M. Sahasrabudhe, Brent A. Huhta
  • Patent number: 8989869
    Abstract: An implantable medical device having an implantable power source such as a rechargeable lithium ion battery. The implantable medical device includes a recharge module that regulates the recharging process of the implantable power source using closed-loop feedback control. The recharge module includes a recharge regulator, a recharge measurement device monitoring at least one recharge parameter, and a recharge regulation control unit for regulating the recharge energy delivered to the power source in response to the recharge measurement device. The recharge module adjusts the energy provided to the power source to ensure that the power source is being recharged under safe levels.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: March 24, 2015
    Assignee: Medtronic, Inc.
    Inventors: Nathan A. Torgerson, James E. Riekels
  • Patent number: 8918184
    Abstract: One or more efficacious electrode combinations for delivering electrical stimulation therapy to a patient may be selected based on the delivery of electrical stimulation to the patient via a predefined set of test electrode combinations in a predetermined order. In some examples, the electrode combinations of the set are arranged in the predetermined order such that adjacent electrode combinations in the order include at least one shared anode electrode or cathode electrode. In addition, the electrode combinations in the predetermined order may define a predetermined sequence of electrode patterns, each electrode pattern defining a relative arrangement between one or more anodes and one or more cathodes of the respective electrode pattern. In some examples, the transition between electrode combinations in the predefined set is achieved by incrementally adjusting at least one of anodic amplitudes assigned to active anode electrodes or cathodic amplitudes assigned to active cathode electrodes.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: December 23, 2014
    Assignee: Medtronic, Inc.
    Inventors: Nathan A. Torgerson, Lynn A. Davenport
  • Publication number: 20140163648
    Abstract: Medical device recharging systems include a controller and a separate recharge device that communicate wirelessly together to provide recharging to an implantable medical device. Either the controller or the recharge device may also communicate wirelessly with the implantable medical device to obtain recharge status and other information. There may be multiple recharge devices present within communication range of the controller, and the controller may determine which recharge device to activate depending upon proximity of each recharge device to the implantable medical device. The controller may allow the recharge device that is active at any given time to change so that the patient having the implantable medical device can move about in the area where the recharge devices are located while recharging continues.
    Type: Application
    Filed: December 19, 2013
    Publication date: June 12, 2014
    Applicant: Medtronic, Inc.
    Inventors: David P. Olson, Nathan A. Torgerson
  • Patent number: 8751007
    Abstract: 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 of the first electrode combination is maintained at a target amplitude level while the amplitude of the second electrode combination is incrementally increased. The stimulation pulses of the electrode combinations are delivered to the patient interleaved in time. In this manner, the invention provides for a smooth, gradual shift from a first electrode combination to a second electrode combination, allowing the patient to maintain a continual perception of stimulation. The shifting techniques described herein may be used during programming to shift between different electrode combinations to find an efficacious electrode combination.
    Type: Grant
    Filed: October 3, 2011
    Date of Patent: June 10, 2014
    Assignee: Medtronic, Inc.
    Inventors: 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
  • Patent number: 8744591
    Abstract: This disclosure describes techniques for obtaining an image of an anatomical implant region where leads associated with an implantable medical device are implanted in a patient, manipulating the image to show lead locations and placements, performing necessary image compression and manipulations, adjusting the image to associate it with information (e.g., patient, metadata, annotations, etc.) useful to a subsequent programmer retrieving the image, and transferring a copy of the captured image to the implantable medical device. The image stored in the implantable medical device may be retrieved at a later time by a user of programmer, where the user can use the image and other associated information to program subsequent therapy.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: June 3, 2014
    Assignee: Medtronic, Inc.
    Inventors: Jon P. Davis, Steven M. Goetz, Nathan A. Torgerson, Wende L. Dewing, Ashish Singal, Lynn A. Davenport, Rajeev M. Sahasrabudhe, Brent A. Huhta
  • Patent number: 8738145
    Abstract: 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 of the first electrode combination is maintained at a target amplitude level while the amplitude of the second electrode combination is incrementally increased. The stimulation pulses of the electrode combinations are delivered to the patient interleaved in time. In this manner, the invention provides for a smooth, gradual shift from a first electrode combination to a second electrode combination, allowing the patient to maintain a continual perception of stimulation. The shifting techniques described herein may be used during programming to shift between different electrode combinations to find an efficacious electrode combination.
    Type: Grant
    Filed: October 3, 2011
    Date of Patent: May 27, 2014
    Assignee: Medtronic, Inc.
    Inventors: 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
  • Patent number: 8730032
    Abstract: Proper insertion of medical leads into medical devices is detected at the time the lead is being inserted. An external device initiates impedance testing by the medical device that is receiving the lead prior to the insertion of the lead being completed. The medical device reports back the results of the impedance testing so that the external device can determine whether the lead is properly inserted at the time of lead insertion and can provide an output to a user to indicate whether the lead insertion is proper. The medical device may poll only a last connector expected to be connected before responding, test other connector combinations before or after responding, and so forth.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: May 20, 2014
    Assignee: Medtronic, Inc.
    Inventors: Nathan A. Torgerson, James A. Zimmerman
  • Publication number: 20140120841
    Abstract: Devices and systems provide for proximity based selection of an implantable medical device for far field communication with an external device. By using a proximity communication that is limited to the IMD of interest during the selection process, the external device can eliminate those IMDs that are in range of far field communications but are able to receive the proximity communication. Thus, information may be shared via a proximity communication that is validated via a far field communication, or shared via a far field communication as a challenge and then validated via a proximity communication. The proximity communication may be used to initially limit the number of devices that respond to a discovery request and then subsequently used to select the intended implantable medical device as well as automatically select the appropriate therapy application corresponding to the selected IMD.
    Type: Application
    Filed: January 3, 2014
    Publication date: May 1, 2014
    Applicant: Medtronic, Inc.
    Inventors: Earle T. Roberts, Donald L. Villalta, David S. Slack, Irfan Z. Ali, Sudheendhar Raghavendran, Nathan A. Torgerson, Garrett R. Sipple
  • Patent number: 8649872
    Abstract: 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 combinations of electrodes to test in a non-random order. According to algorithms consistent with the invention, the programmer may first identify a position of a first cathode for subsequent combinations, and then select electrodes from the set to test with the first cathode as anodes or additional cathodes based on the proximity of the electrodes to the first cathode. The programmer may store information for each combination tested, and the information may facilitate the identification of desirable electrode combinations by the clinician. The clinician may create neurostimulation therapy programs that include identified desirable program combinations.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: February 11, 2014
    Assignee: Medtronic, Inc.
    Inventors: Michael T. Lee, Steven M. Goetz, Nathan A. Torgerson
  • Patent number: 8649757
    Abstract: Devices and systems provide for proximity based selection of an implantable medical device for far field communication with an external device. By using a proximity communication that is limited to the IMD of interest during the selection process, the external device can eliminate those IMDs that are in range of far field communications but are able to receive the proximity communication. Thus, information may be shared via a proximity communication that is validated via a far field communication, or shared via a far field communication as a challenge and then validated via a proximity communication. The proximity communication may be used to initially limit the number of devices that respond to a discovery request and then subsequently used to select the intended implantable medical device as well as automatically select the appropriate therapy application corresponding to the selected IMD.
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: February 11, 2014
    Assignee: Medtronic, Inc.
    Inventors: Earle T. Roberts, Donald L. Villalta, David S Slack, Irfan Z. Ali, Sudheendhar Raghavendran, Nathan A. Torgerson, Garrett R. Sipple
  • Patent number: 8634927
    Abstract: Medical device recharging systems include a controller and a separate recharge device that communicate wirelessly together to provide recharging to an implantable medical device. Either the controller or the recharge device may also communicate wirelessly with the implantable medical device to obtain recharge status and other information. There may be multiple recharge devices present within communication range of the controller, and the controller may determine which recharge device to activate depending upon proximity of each recharge device to the implantable medical device. The controller may allow the recharge device that is active at any given time to change so that the patient having the implantable medical device can move about in the area where the recharge devices are located while recharging continues.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: January 21, 2014
    Assignee: Medtronic, Inc.
    Inventors: David P. Olson, Nathan A. Torgerson