Patents by Inventor Nicholas J. Stessman

Nicholas J. Stessman 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: 9421385
    Abstract: An implantable medical device (IMD) may include multiple power supply circuits and an electrostimulation therapy output circuit configured to, in response to a control signal specifying an electrostimulation therapy, controllably connect any one or more of the first or second power supply circuits to any one or more of a first electrostimulation output node or a second electrostimulation output node to deliver an electrostimulation. In an embodiment, the IMD may include an electrostimulation therapy return circuit configured to establish a return path for the electrostimulation delivered via one or more of the first electrostimulation output node or the second electrostimulation output node.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: August 23, 2016
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Ramprasad Vijayagopal, Nicholas J. Stessman, William J. Linder, Ron A. Balczewski, Keith R. Maile, David J. Ternes
  • Patent number: 9214799
    Abstract: An implantable medical device can include an integrated circuit comprising an electrostatic discharge (ESD) protection circuit. The ESD protection circuit can include an active circuit, a first passive circuit, and a second passive circuit. For example, at least one of the first or second passive circuits can include an array of capacitors in a series configuration, a parallel configuration, or a combination of series and parallel configurations. The first and second passive circuits can be configured to establish a specified time constant, and, in response to an applied ESD, the first and second passive circuits can provide a control signal to active circuit to switch the active circuit from a substantially non-conductive mode to a substantially conductive mode.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: December 15, 2015
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Keith R. Maile, Lance E. Juffer, William J. Linder, Ron A. Balczewski, Nicholas J. Stessman, Mark Duane Jansen
  • Patent number: 8958877
    Abstract: An ambulatory or implantable device, such as a pacer, defibrillator, or other cardiac rhythm management device, can tolerate magnetic resonance imaging (MRI) or other noise without turning on an integrated circuit diode by selectively providing a bias voltage that can overcome an expected induced voltage resulting from the MRI or other noise.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: February 17, 2015
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Nicholas J. Stessman, Michael J. Lyden, Thomas M. Bocek, William J. Linder, Joseph M. Bocek
  • Patent number: 8948866
    Abstract: During auto-threshold, autocapture, or other evoked response sensing, post-pace artifact is reduced by using a smaller coupling capacitor value than what is used when not in such an evoked response sensing configuration. This can be accomplished by borrowing another capacitor for use as the coupling capacitor. The borrowed capacitor can be a backup pacing capacitor from the same or a different pacing channel. The borrowed capacitor can also be a coupling capacitor from a different pacing channel.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: February 3, 2015
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Michael J. Lyden, Nicholas J. Stessman
  • Patent number: 8929041
    Abstract: An integrated circuit for an implantable medical device can include a substrate, a first capacitor, and an electrostatic discharge (ESD) protection circuit. The first capacitor can include an electrically conductive lower polysilicon terminal and an electrically conductive upper polysilicon terminal that can be separated from the lower polysilicon terminal by a first capacitor dielectric material. The ESD protection circuit can include an ESD shunt transistor and a second capacitor. The ESD shunt transistor can be configured to be normally off, but can be configured to turn on and conduct between first and second power supply rails in response to an ESD event exceeding a specified ESD event threshold value. The second capacitor can includes a first substrate terminal and an electrically conductive second polysilicon terminal that can be separated from the first substrate terminal by a second capacitor dielectric material.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: January 6, 2015
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Keith R. Maile, William J. Linder, Lance E. Juffer, Nicholas J. Stessman, Ron A. Balczewski
  • Publication number: 20140296699
    Abstract: An ambulatory or implantable device, such as a pacer, defibrillator, or other cardiac rhythm management device, can tolerate magnetic resonance imaging (MRI) or other noise without turning on an integrated circuit diode by selectively providing a bias voltage that can overcome an expected induced voltage resulting from the MRI or other noise.
    Type: Application
    Filed: June 10, 2014
    Publication date: October 2, 2014
    Inventors: Nicholas J. Stessman, Michael J. Lyden, Thomas M. Bocek, William J. Linder, Joseph M. Bocek
  • Publication number: 20140214107
    Abstract: One aspect of this disclosure relates to a system for dynamic battery management in implantable medical devices. An embodiment of the system includes two or more devices for measuring battery capacity for an implantable medical device battery. The embodiment also includes a controller connected to the measuring devices. The controller is adapted to combine the measurements from the measuring devices using a weighted average to determine battery capacity consumed. According to various embodiments, at least one of the measuring devices includes a coulometer. At least one of the measuring devices includes a capacity-by-voltage device, according to an embodiment. The system further includes a display in communication with the controller in various embodiments. The display is adapted to provide a depiction of battery longevity in units of time remaining in the life of the implantable medical device battery, according to various embodiments. Other aspects and embodiments are provided herein.
    Type: Application
    Filed: April 2, 2014
    Publication date: July 31, 2014
    Applicant: Cardiac Pacemakers, Inc.
    Inventors: Rajesh K. Gandhi, William J. Linder, Michael J. Lyden, Nicholas J. Stessman, Jonathan H. Kelly, James Kalgren
  • Publication number: 20140172038
    Abstract: During auto-threshold, autocapture, or other evoked response sensing, post-pace artifact is reduced by using a smaller coupling capacitor value than what is used when not in such an evoked response sensing configuration. This can be accomplished by borrowing another capacitor for use as the coupling capacitor. The borrowed capacitor can be a backup pacing capacitor from the same or a different pacing channel. The borrowed capacitor can also be a coupling capacitor from a different pacing channel.
    Type: Application
    Filed: February 20, 2014
    Publication date: June 19, 2014
    Applicant: Cardiac Pacemakers, Inc.
    Inventors: Michael J. Lyden, Nicholas J. Stessman
  • Patent number: 8755886
    Abstract: An ambulatory or implantable device, such as a pacer, defibrillator, or other cardiac rhythm management device, can tolerate magnetic resonance imaging (MRI) or other noise without turning on an integrated circuit diode by selectively providing a bias voltage that can overcome an expected induced voltage resulting from the MRI or other noise.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: June 17, 2014
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Nicholas J. Stessman, Michael J. Lyden, Thomas M. Bocek, William J. Linder, Joseph M. Bocek
  • Patent number: 8718771
    Abstract: One aspect of this disclosure relates to a system for dynamic battery management in implantable medical devices. An embodiment of the system includes two or more devices for measuring battery capacity for an implantable medical device battery. The embodiment also includes a controller connected to the measuring devices. The controller is adapted to combine the measurements from the measuring devices using a weighted average to determine battery capacity consumed. According to various embodiments, at least one of the measuring devices includes a coulometer. At least one of the measuring devices includes a capacity-by-voltage device, according to an embodiment. The system further includes a display in communication with the controller in various embodiments. The display is adapted to provide a depiction of battery longevity in units of time remaining in the life of the implantable medical device battery, according to various embodiments. Other aspects and embodiments are provided herein.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: May 6, 2014
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Rajesh K. Gandhi, William J. Linder, Michael J. Lyden, Nicholas J. Stessman, Jonathan H. Kelly, James Kalgren
  • Patent number: 8694095
    Abstract: During auto-threshold, autocapture, or other evoked response sensing, post-pace artifact is reduced by using a smaller coupling capacitor value than what is used when not in such an evoked response sensing configuration. This can be accomplished by borrowing another capacitor for use as the coupling capacitor. The borrowed capacitor can be a backup pacing capacitor from the same or a different pacing channel. The borrowed capacitor can also be a coupling capacitor from a different pacing channel.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: April 8, 2014
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Michael J. Lyden, Nicholas J. Stessman
  • Patent number: 8688213
    Abstract: An apparatus comprises a cardiac signal sensing circuit configured to sense an electrical cardiac signal from at least one of an atrium or ventricle of a heart of a subject, a therapy circuit configured to provide electrical pacing therapy and electrical autonomic neural modulation therapy to the subject, and a control circuit. The control circuit is configured to initiate delivery of the autonomic modulation neural therapy, and the control circuit includes a signal detection circuit configured to detect delivery of the autonomic neural modulation therapy in the sensed cardiac signal. The control circuit is configured to change, in response to detecting the delivery, a sensitivity of the cardiac signal sensing circuit during delivery of the autonomic neural modulation therapy.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: April 1, 2014
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: David J. Ternes, Douglas J. Brandner, Ramprasad Vijayagopal, Nicholas J. Stessman, William J. Linder, Keith R. Maile, Abhi V. Chavan
  • Publication number: 20140052207
    Abstract: An implantable medical device (IMD) may include multiple power supply circuits and an electrostimulation therapy output circuit configured to, in response to a control signal specifying an electrostimulation therapy, controllably connect any one or more of the first or second power supply circuits to any one or more of a first electrostimulation output node or a second electrostimulation output node to deliver an electrostimulation. In an embodiment, the IMD may include an electrostimulation therapy return circuit configured to establish a return path for the electrostimulation delivered via one or more of the first electrostimulation output node or the second electrostimulation output node.
    Type: Application
    Filed: July 18, 2013
    Publication date: February 20, 2014
    Inventors: Ramprasad Vijayagopal, Nicholas J. Stessman, William J. Linder, Ron A. Balczewski, Keith R. Maile, David J. Ternes
  • Patent number: 8649862
    Abstract: A medical device can include a therapy circuit configured to provide a specified electrostimulation therapy to a tissue site, the specified electrostimulation therapy including a scheduled completion, the therapy circuit including a protection circuit configured to adjust specification of the electrostimulation therapy being provided so as to provide an adjusted electrostimulation therapy before the scheduled completion. The medical device can include a monitoring circuit comprising a comparator. The monitoring circuit can be configured to trigger the protection circuit to inhibit the therapy circuit when the therapy circuit output parameter exceeds the specified threshold as indicated by the comparator.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: February 11, 2014
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Jacob M. Ludwig, William J. Linder, Douglas J. Brandner, Nicholas J. Stessman, Douglas Michael Hannan, Scott R. Stubbs, Jeffrey E. Stahmann, Arthur Foster
  • Publication number: 20140022678
    Abstract: An implantable medical device can include an integrated circuit comprising an electrostatic discharge (ESD) protection circuit. The ESD protection circuit can include an active circuit, a first passive circuit, and a second passive circuit. For example, at least one of the first or second passive circuits can include an array of capacitors in a series configuration, a parallel configuration, or a combination of series and parallel configurations. The first and second passive circuits can be configured to establish a specified time constant, and, in response to an applied ESD, the first and second passive circuits can provide a control signal to active circuit to switch the active circuit from a substantially non-conductive mode to a substantially conductive mode.
    Type: Application
    Filed: July 11, 2013
    Publication date: January 23, 2014
    Inventors: Keith R. Maile, Lance E. Juffer, William J. Linder, Ron A. Balczewski, Nicholas J. Stessman, Mark Duane Jansen
  • Patent number: 8478404
    Abstract: An apparatus comprises an electrostimulation energy storage capacitor, a circuit path that provides pacing stimulation from the capacitor through the load, a constant current neural stimulation circuit that is switchable into the circuit path to provide neural stimulation through the load and switchable out of the circuit path to provide the pacing stimulation through the load, and a control circuit configured to selectively enable delivery of the pacing stimulation or the constant current neural stimulation.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: July 2, 2013
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Keith R. Maile, Ramprasad Vijayagopal, Nicholas J. Stessman, Firmin Musungu
  • Publication number: 20130138170
    Abstract: An apparatus comprises a cardiac signal sensing circuit configured to sense an electrical cardiac signal from at least one of an atrium or ventricle of a heart of a subject, a therapy circuit configured to provide electrical pacing therapy and electrical autonomic neural modulation therapy to the subject, and a control circuit. The control circuit is configured to initiate delivery of the autonomic modulation neural therapy, and the control circuit includes a signal detection circuit configured to detect delivery of the autonomic neural modulation therapy in the sensed cardiac signal. The control circuit is configured to change, in response to detecting the delivery, a sensitivity of the cardiac signal sensing circuit during delivery of the autonomic neural modulation therapy.
    Type: Application
    Filed: October 25, 2012
    Publication date: May 30, 2013
    Inventors: David J. Ternes, Douglas J. Brandner, Ramprasad Vijayagopal, Nicholas J. Stessman, William J. Linder, Keith R. Maile, Abhi V. Chavan
  • Patent number: 8391992
    Abstract: An implantable or other ambulatory medical device can include a magnetic field detector, such as configured to detect an intense magnetic field. In an example, the ambulatory or implantable medical device can include an inductive switching supply, such as including one or more of a peak current comparator, or a zero current comparator. In an example, the ambulatory or implantable medical device can include a controller circuit, configured to control a switch, such as to controllably charge an inductor included in the inductive switching supply.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: March 5, 2013
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Michael J. Lyden, Nicholas J. Stessman
  • Patent number: 8335563
    Abstract: An implantable medical device with an inductive switching regulator having an inductor with a ferromagnetic core is described. The device incorporates a core saturation detector for detecting saturation in the inductor core indicating the presence of a magnetic field such as produced by an MRI scan. The device is configured to alter its behavior when core saturation is detected such as by entering an MRI mode that may include cessation of therapy, fixed-rate bradycardia pacing, and/or disablement of tachyarrhythmia therapy.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: December 18, 2012
    Assignee: Cardiac Pacemakers, Inc.
    Inventor: Nicholas J. Stessman
  • Publication number: 20120116471
    Abstract: One aspect of this disclosure relates to a system for dynamic battery management in implantable medical devices. An embodiment of the system includes two or more devices for measuring battery capacity for an implantable medical device battery. The embodiment also includes a controller connected to the measuring devices. The controller is adapted to combine the measurements from the measuring devices using a weighted average to determine battery capacity consumed. According to various embodiments, at least one of the measuring devices includes a coulometer. At least one of the measuring devices includes a capacity-by-voltage device, according to an embodiment. The system further includes a display in communication with the controller in various embodiments. The display is adapted to provide a depiction of battery longevity in units of time remaining in the life of the implantable medical device battery, according to various embodiments. Other aspects and embodiments are provided herein.
    Type: Application
    Filed: November 2, 2011
    Publication date: May 10, 2012
    Inventors: Rajesh Krishan Gandhi, William J. Linder, Michael J. Lyden, Nicholas J. Stessman, Jonathan H. Kelly, James Kalgren