Patents by Inventor Todd J. Sheldon

Todd J. Sheldon 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).

  • Publication number: 20210052895
    Abstract: A medical device is configured to set a post-atrial time interval in response to an atrial event and generate an event time signal in response to a ventricular electrical signal crossing an R-wave sensing threshold during the post-atrial time interval. The device accumulates oversensing evidence in response to the event time signal and adjusts a ventricular sensing control parameter based on the accumulated oversensing evidence in some examples.
    Type: Application
    Filed: August 18, 2020
    Publication date: February 25, 2021
    Inventors: Maureen E. LYBARGER, Jian CAO, Wade M. DEMMER, Michael W. HEINKS, Jean E. HUDSON, Michael KEMMERER, James J. ST. MARTIN, Todd J. SHELDON
  • Publication number: 20200406041
    Abstract: A medical device is configured to sense a cardiac electrical signal and determine from the cardiac electrical signal at least one of a maximum peak amplitude of a positive slope of the cardiac electrical signal and a maximum peak time interval from a pacing pulse to the maximum peak amplitude. The device is configured to determine a capture type of the pacing pulse based on at least one or both of the maximum peak amplitude and the maximum peak time interval.
    Type: Application
    Filed: June 15, 2020
    Publication date: December 31, 2020
    Inventors: Jian CAO, Wade M. DEMMER, Maureen E. LYBARGER, Elizabeth A. MATTSON, Todd J. SHELDON, Zhongping YANG, Xiaohong ZHOU
  • Patent number: 10864377
    Abstract: An intracardiac ventricular pacemaker is configured to operate in in a selected one of an atrial-tracking ventricular pacing mode and a non-atrial tracking ventricular pacing mode. A control circuit of the pacemaker determines at least one motion signal metric from the motion signal, compares the at least one motion signal metric to pacing mode switching criteria, and, responsive to the pacing mode switching criteria being satisfied, switches from the selected one of the non-atrial tracking pacing mode and the atrial tracking pacing mode to the other one of the non-atrial tracking pacing mode and the atrial tracking pacing mode for controlling ventricular pacing pulses delivered by the pacemaker.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: December 15, 2020
    Assignee: Medtronic, Inc.
    Inventors: Todd J. Sheldon, Yong K. Cho, Wade M. Demmer, Mark K. Erickson, Vincent E. Splett
  • Publication number: 20200368535
    Abstract: A pacemaker having a motion sensor delivers atrial-synchronized ventricular pacing by detecting events from a signal produced by the motion sensor and delivering ventricular pacing pulses at a rate that tracks the rate of the detected events. The pacemaker is configured to confirm atrial tracking of the ventricular pacing pulses by determining if detected events from the motion sensor signal are atrial events. The pacemaker is configured to adjust a control parameter used for detecting events from the motion sensor signal if atrial tracking is not confirmed.
    Type: Application
    Filed: August 14, 2020
    Publication date: November 26, 2020
    Inventors: Todd J. SHELDON, Wade M. DEMMER, Greggory R. HERR
  • Publication number: 20200368540
    Abstract: Techniques for minimizing rate of depletion of a non-rechargeable power source, to extend the operational lifetime of an implantable medical device that includes the non-rechargeable power source, by enforcing operational-mode-specific communication protocols whereby inter-device communication between the implantable medical device and another implantable medical device is such that level of power draw from the non-rechargeable power source by the implantable medical device is less than level of power draw from the rechargeable power source by the another implantable medical device for the implantable medical devices to engage in communication with each other.
    Type: Application
    Filed: August 11, 2020
    Publication date: November 26, 2020
    Inventors: Wade M. Demmer, Yong K. Cho, Michael F. Hess, Todd J. Sheldon
  • Publication number: 20200316386
    Abstract: A medical device includes a motion sensor for producing a motion signal including cardiac event signals. The medical device generates a ventricular pacing pulse upon expiration of a pacing interval. The medical device determines a synchrony metric from the motion signal after a delivered ventricular pacing pulse and adjusts the pacing interval based on the synchrony metric.
    Type: Application
    Filed: March 30, 2020
    Publication date: October 8, 2020
    Inventors: Wade M. DEMMER, Alexander R. MATTSON, Todd J. SHELDON, Zhongping YANG
  • Publication number: 20200289821
    Abstract: A leadless pacing system includes a leadless pacing device and a sensing extension extending from a housing of the leadless pacing device. The sensing extension includes one or more electrodes with which the leadless pacing device may sense electrical cardiac activity. The one or more electrodes of the sensing extension may be carried by a self-supporting body that is configured to passively position the one or more electrodes proximate or within a chamber of the heart other than the chamber in which the LPD is implanted.
    Type: Application
    Filed: June 3, 2020
    Publication date: September 17, 2020
    Inventors: Thomas A. ANDERSON, Todd J. SHELDON, Matthew D. BONNER, Noelle C. NEAFUS
  • Patent number: 10773086
    Abstract: An IMD system receives a near field His bundle electrical signal produced by a patient's heart via a first sensing electrode vector and a far field cardiac electrical signal via a second sensing electrode vector different than the first sensing electrode vector. The IMD system generates His bundle pacing pulses delivered to the patient's heart via a His pacing electrode vector and determines a type of cardiac capture evoked by a His bundle pacing pulse.
    Type: Grant
    Filed: November 8, 2018
    Date of Patent: September 15, 2020
    Assignee: Medtronic, Inc.
    Inventors: Todd J. Sheldon, Shawn M. Campbell, Maureen E. Lybarger, Elizabeth A. Mattson, Eric R. Williams, Zhongping Yang
  • Patent number: 10751542
    Abstract: Techniques for minimizing rate of depletion of a non-rechargeable power source, to extend the operational lifetime of an implantable medical device that includes the non-rechargeable power source, by enforcing operational-mode-specific communication protocols whereby inter-device communication between the implantable medical device and another implantable medical device is such that level of power draw from the non-rechargeable power source by the implantable medical device is less than level of power draw from the rechargeable power source by the another implantable medical device for the implantable medical devices to engage in communication with each other.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: August 25, 2020
    Assignee: Medtronic, Inc.
    Inventors: Wade M. Demmer, Yong K. Cho, Michael F. Hess, Todd J. Sheldon
  • Patent number: 10744329
    Abstract: A pacemaker having a motion sensor delivers atrial-synchronized ventricular pacing by detecting events from a signal produced by the motion sensor and delivering ventricular pacing pulses at a rate that tracks the rate of the detected events. The pacemaker is configured to confirm atrial tracking of the ventricular pacing pulses by determining if detected events from the motion sensor signal are atrial events. The pacemaker is configured to adjust a control parameter used for detecting events from the motion sensor signal if atrial tracking is not confirmed.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: August 18, 2020
    Assignee: Medtronic, Inc.
    Inventors: Todd J. Sheldon, Wade M. Demmer, Greggory R. Herr
  • Publication number: 20200254262
    Abstract: An implantable medical device is configured determine a numerical value of a variable that is monitored by the implantable medical device and convert the numerical value to a data sequence of modulated electrical stimulation rate intervals. The implantable medical device delivers electrical stimulation pulses according to the data sequence of modulated stimulation rate intervals to cause a modulated rate of activation of excitable tissue of a patient corresponding to the modulated stimulation rate intervals. The modulated rate of activation is detectable by a rate monitor for demodulation to the numerical value of the monitored variable data value. In some examples, the implantable medical device is a pacemaker delivering cardiac pacing pulses according to modulated pacing rate intervals to cause a modulated heart rate of the patient detectable by a heart rate monitor for demodulation to the numerical value of the monitored variable.
    Type: Application
    Filed: February 10, 2020
    Publication date: August 13, 2020
    Inventors: Wade M. DEMMER, Todd J. SHELDON
  • Publication number: 20200179707
    Abstract: A pacemaker having a motion sensor is configured to set atrial event sensing parameters used for sensing atrial systolic events from a motion signal produced by the motion sensor. The pacemaker sets at least one atrial event sensing parameter by identifying ventricular electrical events and setting a sensing window following each of the ventricular electrical events. The pacemaker may determine a feature of the motion signal produced by the motion sensor during each of the sensing windows and set the atrial event sensing parameter based on the determined features.
    Type: Application
    Filed: December 4, 2019
    Publication date: June 11, 2020
    Inventors: Vincent E. SPLETT, Keelia DOYLE, Greggory R. HERR, Juliana E. PRONOVICI, Todd J. SHELDON
  • Publication number: 20200179708
    Abstract: A pacemaker having a motion sensor is configured to select an atrial event sensing vector of a multi-axis motion sensor for sensing atrial systolic events from a motion signal produced by the motion sensor. In some examples, the pacemaker determines a maximum amplitude during a sensing window for each one of multiple vector signals produced by the multi-axis motion sensor. The pacemaker may select the atrial event sensing vector signal from among the vector signals based on the determined maximum amplitudes.
    Type: Application
    Filed: December 4, 2019
    Publication date: June 11, 2020
    Inventors: Vincent E. SPLETT, Juliana E. PRONOVICI, Todd J. SHELDON
  • Publication number: 20200179701
    Abstract: A pacemaker is configured to operate in an atrial synchronous ventricular pacing mode and, after expiration of a conduction check time interval, switch to an asynchronous ventricular pacing mode that includes setting a ventricular pacing interval to a base pacing rate interval. The pacemaker is further configured to determine when atrioventricular block detection criteria are satisfied during the asynchronous ventricular pacing mode and, responsive to the atrioventricular block detection criteria being satisfied, switch back to the atrial synchronous ventricular pacing mode.
    Type: Application
    Filed: December 4, 2019
    Publication date: June 11, 2020
    Inventors: Juliana E. PRONOVICI, James W. BUSACKER, Keelia DOYLE, Vincent P. GANION, Greggory R. HERR, Todd J. SHELDON, Vincent E. SPLETT
  • Patent number: 10674928
    Abstract: A leadless pacing system includes a leadless pacing device and a sensing extension extending from a housing of the leadless pacing device. The sensing extension includes one or more electrodes with which the leadless pacing device may sense electrical cardiac activity. The one or more electrodes of the sensing extension may be carried by a self-supporting body that is configured to passively position the one or more electrodes proximate or within a chamber of the heart other than the chamber in which the LPD is implanted.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: June 9, 2020
    Assignee: Medtronic, Inc.
    Inventors: Thomas A Anderson, Todd J Sheldon, Matthew D Bonner, Noelle C Neafus
  • Publication number: 20200170875
    Abstract: Disclosed is a dual-receptacle carrier that is generally configured for attachment to a rollator or walker and that is configured to retain either a beverage or a mobile device, such as a cellular telephone. The device comprises a body, a base, and first and second opposing retention arm portions that are configured as a receptacle for a beverage. The first and second opposing retention arm portions and base include recesses that define a receptacle for an electronic device.
    Type: Application
    Filed: February 5, 2020
    Publication date: June 4, 2020
    Inventors: Todd Brockway, Emily Berman, Caren Wax, Tambra Martin, William Elliott Brooks, Robert W. Sheldon, Gregory J. Foster
  • Publication number: 20200147396
    Abstract: A medical device is configured to produce a cardiac motion signal by sampling a signal produced by an axis of a motion sensor, starting a blanking period, suspending the sampling of the signal during at least a portion of the blanking period, and restarting the sampling of the signal at the sampling frequency before the blanking period has expired. The medical device may detect a cardiac event from the cardiac motion signal and generate a pacing pulse in response to detecting the cardiac event in some examples.
    Type: Application
    Filed: November 12, 2019
    Publication date: May 14, 2020
    Inventors: Todd J. SHELDON, Vincent P. GANION, Greggory R. HERR, Michael L. HUDZIAK, Juliana E. PRONOVICI, Paul R. SOLHEIM
  • Publication number: 20200146580
    Abstract: An implantable medical device is configured to determine a first atrial arrhythmia score from ventricular events sensed by a sensing circuit of an implantable medical device and determine a second atrial arrhythmia score from an intraventricular signal comprising atrial mechanical event signals attendant to atrial systole and produced by a sensor of the implantable medical device. An atrial arrhythmia is detected based on the first atrial arrhythmia score and the second atrial arrhythmia score.
    Type: Application
    Filed: November 12, 2018
    Publication date: May 14, 2020
    Inventors: Shantanu SARKAR, Wade M. DEMMER, Todd J. SHELDON, Vincent E. SPLETT
  • Publication number: 20200121931
    Abstract: An implantable medical device includes an activity sensor, a pulse generator, and a control module. The control module is configured to determine activity metrics from the activity signal and determine an activity metric value at a predetermined percentile of the activity metrics. The control module sets a lower pacing rate set point based on the activity metric value at the predetermined percentile.
    Type: Application
    Filed: December 18, 2019
    Publication date: April 23, 2020
    Inventors: Todd J. SHELDON, Wade M. DEMMER, Karen J. KLECKNER, Douglas A. PETERSON, Paul R. SOLHEIM
  • Patent number: RE48197
    Abstract: A leadless pacing device (LPD) includes a motion sensor configured to generate a motion signal as a function of heart movement. The LPD is configured to analyze the motion signal within an atrial contraction detection window that begins an atrial contraction detection delay period after activation of the ventricle, and detect a contraction of an atrium of the heart based on the analysis of the motion signal within the atrial contraction detection window. If the LPD does not detect a ventricular depolarization subsequent to the atrial contraction, e.g., with an atrio-ventricular (AV) interval beginning when the atrial contraction was detected, the LPD delivers a ventricular pacing pulse.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: September 8, 2020
    Assignee: Medtronic, Inc.
    Inventors: Yong K. Cho, Aleksandre T. Sambelashvili, Todd J. Sheldon