Patents by Inventor Yong K. Cho

Yong K. Cho 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: 20190083801
    Abstract: An implantable medical device has a housing having a proximal end, a distal end and an outer sidewall extending from the proximal end to the distal end. A fixation sheath includes a housing sheath portion extending along the outer sidewall of the housing, and a fixation member portion extending from the housing sheath portion. The housing sheath portion is advanceable from a first position along the outer sidewall of the housing in which the fixation member portion is retracted toward the proximal end of the housing to a second position along the outer sidewall of the housing in which the fixation member portion is deployed to extend away from the housing distal end for anchoring the implantable medical device at an implant site.
    Type: Application
    Filed: September 15, 2017
    Publication date: March 21, 2019
    Inventors: Zhongping YANG, Thomas A. ANDERSON, Yong K. CHO, Becky L. DOLAN, Rick D. MCVENES
  • Patent number: 10226630
    Abstract: Various techniques for measuring cardiac cycle length and pressure metrics based on pulmonary artery pressures are described. One example method described includes identifying a point within a derivative signal of a cardiovascular pressure signal without reference to electrical activity of a heart, initiating a time window from the identified point in the derivative signal, identifying a point within the cardiovascular signal within the time window, and determining at least one of a systolic pressure or diastolic pressure based on the identified point.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: March 12, 2019
    Assignee: Medtronic, Inc.
    Inventors: Saul E Greenhut, Robert T Taepke, David R Bloem, Yong K Cho, Donna M Salmi
  • Patent number: 10207116
    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: December 1, 2016
    Date of Patent: February 19, 2019
    Assignee: Medtronic, Inc.
    Inventors: Todd J Sheldon, Yong K Cho, Wade M Demmer, Mark K Erickson, Vincent E Splett
  • Patent number: 10182729
    Abstract: The exemplary systems and methods may monitor one or more signals to be used to assess the hemodynamic status of a patient. The one or more signals may be used to calculate, or determine, a plurality of pulse transit times. The plurality of pulse transit times may be used to determine hemodynamic status values that may be indicative of a patient's aggregate hemodynamic status.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: January 22, 2019
    Assignee: Medtronics, Inc.
    Inventors: Todd M. Zielinski, David A. Anderson, Tom D. Bennett, James K. Carney, Can Cinbis, Yong K. Cho, Jonathan L. Kuhn, Brian B. Lee, Richard J. O'Brien, Eduardo N. Warman, Vinod Sharma
  • Publication number: 20180361160
    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: Application
    Filed: June 28, 2018
    Publication date: December 20, 2018
    Inventors: Todd J. SHELDON, Yong K. CHO, Wade M. DEMMER, Mark K. ERICKSON, Vincent E. SPLETT
  • Publication number: 20180168502
    Abstract: Sensing circuitry of an implantable medical device (IMD) system may sense a cardiac signal that varies according to a cardiac cycle of a patient. Processing circuitry of the IMD system may determine a series of consecutive cardiac cycle length metric values based on the sensed cardiac signal, identify a plurality of pairs of the cardiac cycle length metrics, each of the pairs of cardiac cycle length metrics separated by an integer ā€˜nā€™ of the cardiac cycle length metrics, and construct a distribution of the pairs of cardiac cycle length metrics based on values of the cardiac cycle length metrics for each of the pairs. The processing circuitry may detect a sleep apnea episode of the patient based on one or more characteristics of the constructed distribution, and control communication circuitry of the IMD system to transmit an indication of the detected sleep apnea episode to the external computing device.
    Type: Application
    Filed: December 16, 2016
    Publication date: June 21, 2018
    Inventors: Yong K. Cho, Shantanu Sarkar, Eduardo N. Warman
  • Publication number: 20180161580
    Abstract: An intracardiac pacemaker system is configured to produce physiological atrial event signals by a sensing circuit of a ventricular intracardiac pacemaker and select a first atrial event input as the physiological atrial event signals. The ventricular intracardiac pacemaker detects atrial events from the selected first atrial event input, determines if input switching criteria are met, and switches from the first atrial event input to a second atrial event input in response to the input switching criteria being met. The second atrial event input includes broadcast atrial event signals produced by a second implantable medical device and received by the ventricular intracardiac pacemaker.
    Type: Application
    Filed: December 13, 2016
    Publication date: June 14, 2018
    Inventors: Wade M. Demmer, Yong K. Cho, Mark K. Erickson, Todd J. Sheldon
  • Publication number: 20180154154
    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: Application
    Filed: December 1, 2016
    Publication date: June 7, 2018
    Inventors: Todd J Sheldon, Yong K Cho, Wade M Demmer, Mark K Erickson, Vincent E Splett
  • Patent number: 9981135
    Abstract: A medical device system including at least a first implantable medical device and a second implantable medical device is configured to establish by a control module of the first implantable medical device whether the second implantable medical device is present in a patient and self-configure an operating mode of the control module in response to establishing that the second implantable medical device is present.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: May 29, 2018
    Assignee: Medtronic, Inc.
    Inventors: Yong K Cho, Wade M Demmer, Michael D Eggen, Kathryn Hilpisch, Michael F Hess, Todd J Sheldon, Saul E Greenhut
  • Publication number: 20180117337
    Abstract: An intracardiac ventricular pacemaker having a motion sensor is configured to produce a motion signal including an atrial systolic event and at least one ventricular diastolic event. The pacemaker is configured to set an atrial refractory period, detect a change in a ventricular diastolic event metric and adjust the atrial refractory period in response to detecting the change. The pacemaker sets set an atrioventricular pacing interval in response to detecting the atrial systolic event from the motion signal after expiration of the atrial refractory period.
    Type: Application
    Filed: November 3, 2016
    Publication date: May 3, 2018
    Inventors: Wade M Demmer, Yong K Cho, Mark K Erickson, Michael F Hess, Todd J Sheldon, Vincent E Splett
  • Patent number: 9943236
    Abstract: An implantable medical device system and associated method for use in guiding an acute decompensated heart failure therapy set an optimal fluid status measurement level. A physiological sensor signal sensed by an implantable medical device is used to compute the fluid status measurement. A target rate of change of the fluid status measurement is computed for guiding the therapy.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: April 17, 2018
    Assignee: Medtronic, Inc.
    Inventors: Tommy D. Bennett, Yong K. Cho
  • Publication number: 20180085588
    Abstract: An intracardiac ventricular pacemaker having a motion sensor is configured to produce a motion signal including an atrial systolic event and a ventricular diastolic event indicating a passive ventricular filling phase, set a detection threshold to a first amplitude during an expected time interval of the ventricular diastolic event and to a second amplitude lower than the first amplitude after an expected time interval of the ventricular diastolic event. The pacemaker is configured to detect the atrial systolic event in response to the motion signal crossing the detection threshold and set an atrioventricular pacing interval in response to detecting the atrial systolic event.
    Type: Application
    Filed: September 29, 2016
    Publication date: March 29, 2018
    Inventors: Vincent E Splett, Todd J Sheldon, Yong K Cho, Wade M Demmer, Mark K Erickson
  • Publication number: 20180085589
    Abstract: An intracardiac ventricular pacemaker is configured to detect a ventricular diastolic event from a motion signal received by a pacemaker control circuit from a motion sensor. The control circuit starts an atrial refractory period having an expiration time set based on a time of the detection of the ventricular diastolic event. The control circuit detects an atrial systolic event from the motion signal after expiration of the atrial refractory period and controls a pulse generator of the pacemaker to deliver a pacing pulse to a ventricle of a patient's heart at a first atrioventricular pacing time interval after the atrial systolic event detection.
    Type: Application
    Filed: September 29, 2016
    Publication date: March 29, 2018
    Inventors: Vincent E. Splett, Todd J. Sheldon, Yong K. Cho, Wade M. Demmer, Mark K. Erickson
  • Publication number: 20180055386
    Abstract: The exemplary systems and methods may monitor one or more signals to be used to assess the hemodynamic status of a patient. The one or more signals may be used to calculate, or determine, a plurality of pulse transit times. The plurality of pulse transit times may be used to determine hemodynamic status values that may be indicative of a patient's aggregate hemodynamic status.
    Type: Application
    Filed: August 31, 2016
    Publication date: March 1, 2018
    Inventors: Todd M. Zielinski, David A. Anderson, Tom D. Bennett, James K. Carney, Can Cinbis, Yong K. Cho, Jonathan L. Kuhn, Brian B. Lee, Richard J. O'Brien, Eduardo N. Warman, Vinod Sharma
  • Patent number: 9861817
    Abstract: Medical devices and methods for providing breathing therapy (e.g., for treating heart failure, hypertension, etc.) may determine at least the inspiration phase of one or more breathing cycles based on the monitored physiological parameters and control delivery of a plurality of breathing therapy sessions (e.g., each of the breathing therapy sessions may be provided during a defined time period). Further, each of the plurality of breathing therapy sessions may include delivering stimulation after the start of the inspiration phase of each of a plurality of breathing cycles to prolong diaphragm contraction during the breathing cycle.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: January 9, 2018
    Assignee: Medtronic, Inc.
    Inventors: Yong K Cho, Shaileshkumar V Musley, Avram Scheiner
  • Patent number: 9724018
    Abstract: Systems and methods for monitoring phrenic nerve function of a patient are disclosed, including, including establishing a diaphragmatic movement value threshold; positioning a diaphragmatic movement sensor on an external surface of an abdomen of the patient; applying a treatment regimen to a tissue region in proximity to the phrenic nerve; measuring a diaphragmatic movement value with the diaphragmatic movement sensor; comparing the measured diaphragmatic movement value to the established diaphragmatic movement value threshold; and generating an alert in response to the comparison.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: August 8, 2017
    Assignee: Medtronic CryoCath LP
    Inventors: Yong K. Cho, Scott A. Ransom, Xusheng Zhang
  • Publication number: 20170112390
    Abstract: A medical device system and method for monitoring a cardiovascular pressure signal to identify an atrial arrhythmia that includes a sensor sensing a cardiovascular pressure signal and a pressure analysis module that is configured to determine at least one of an interval dispersion and an amplitude dispersion of the sensed pressure signal, compare the at least one of an interval dispersion and an amplitude dispersion of the sensed pressure signal to a dispersion threshold, and determine whether the atrial arrhythmia is occurring in response to the comparing
    Type: Application
    Filed: October 22, 2015
    Publication date: April 27, 2017
    Inventors: Yong K. Cho, Michael R.S. Hill
  • Publication number: 20170105635
    Abstract: An implantable medical device includes a housing having a proximal end and a distal end, a control module enclosed by the housing, and a pressure sensor electrically coupled to the control module. A fixation member is coupled to the housing distal end for anchoring the housing distal end at a fixation site within a cardiovascular system of a patient, and the pressure sensor is spaced apart proximally from the fixation member.
    Type: Application
    Filed: November 6, 2015
    Publication date: April 20, 2017
    Inventors: Yong K. Cho, Michael F. Hess, Leonardo Rapallini, Todd J. Sheldon, Brian D. Urke
  • Patent number: 9597511
    Abstract: An implantable medical device and associated method to determine an optimal control parameter setting for controlling a cardiac therapy that includes a therapy delivery module to deliver cardiac pacing signals at a plurality of pacing rates, and an admittance measurement module to determine admittance signals associated with each of the plurality of pacing rates. A control unit determines metrics of hemodynamic performance corresponding to each of the plurality of pacing rates in response to the determined admittance signals, identifies pacing rates of the plurality of pacing rates as rejected rates in response to the determined metrics of hemodynamic performance, and determines a pacing rate of the plurality of pacing rates as an optimal rate for delivering the cardiac therapy in response to the identified pacing rates.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: March 21, 2017
    Assignee: Medtronic, Inc.
    Inventors: Yong K. Cho, Douglas A. Hettrick, Todd M. Zielinski
  • Publication number: 20160220825
    Abstract: Various techniques for measuring cardiac cycle length and pressure metrics based on pulmonary artery pressures are described. One example method described includes identifying a point within a derivative signal of a cardiovascular pressure signal without reference to electrical activity of a heart, initiating a time window from the identified point in the derivative signal, identifying a point within the cardiovascular signal within the time window, and determining at least one of a systolic pressure or diastolic pressure based on the identified point.
    Type: Application
    Filed: January 25, 2016
    Publication date: August 4, 2016
    Inventors: Saul E. Greenhut, Robert T. Taepke, David R. Bloem, Yong K. Cho, Donna M. Salmi