Patents by Inventor Catherine R. Condie

Catherine R. Condie 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: 20160128603
    Abstract: A method of assessing a tissue ablation treatment, including positioning a medical device adjacent a target tissue; measuring a first impedance magnitude a first frequency with the medical device; measuring a first impedance phase at a second frequency with the medical device; ablating at least a portion of the target tissue with the medical device; measuring at second impedance magnitude at a third frequency with the medical device; measuring a second impedance phase at a fourth frequency with the medical device; comparing at least one of (i) the first and second impedance magnitudes and (ii) the first and second impedance phases; and providing an indication of the efficacy of the ablation treatment based at least in part on the comparison.
    Type: Application
    Filed: January 15, 2016
    Publication date: May 12, 2016
    Inventors: Marshall L. SHERMAN, Catherine R. CONDIE, Mark T. STEWART
  • Publication number: 20160058505
    Abstract: Systems and methods for assessing tissue contact, including positioning an electrode adjacent a tissue region; delivering radiofrequency energy to the electrode, wherein the delivered radiofrequency energy is sufficient to ablate at least a portion of the tissue region; obtaining a plurality of impedance measurements from the electrode during the delivery of the radiofrequency energy; calculating a change in the impedance measurements over a pre-determined time period; and generating an alert if the calculated change is less than a pre-defined value.
    Type: Application
    Filed: November 6, 2015
    Publication date: March 3, 2016
    Inventors: Catherine R. CONDIE, Marshall L. SHERMAN, Mark T. STEWART
  • Patent number: 9265557
    Abstract: A method of assessing a tissue ablation treatment, including positioning a medical device adjacent a target tissue; measuring a first impedance magnitude a first frequency with the medical device; measuring a first impedance phase at a second frequency with the medical device; ablating at least a portion of the target tissue with the medical device; measuring at second impedance magnitude at a third frequency with the medical device; measuring a second impedance phase at a fourth frequency with the medical device; comparing at least one of (i) the first and second impedance magnitudes and (ii) the first and second impedance phases; and providing an indication of the efficacy of the ablation treatment based at least in part on the comparison.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: February 23, 2016
    Assignee: Medtronic Ablation Frontiers LLC
    Inventors: Marshall L. Sherman, Catherine R. Condie, Mark T. Stewart
  • Patent number: 9216050
    Abstract: A method and system for detecting microbubble formation during a radiofrequency ablation procedure. The method includes measuring an impedance of a pair of electrodes, at least one electrode in the pair of electrodes being coupled to a treatment assembly of a medical device. Radiofrequency ablation energy is transmitted between the pair of electrodes. The transmission of radiofrequency ablation energy between the pair of electrodes is terminated when after a predetermined period of time the measured impedance in either of the electrodes in the pair of electrodes is a predetermined percentage above a measured minimum impedance and a measured power is above a predetermined power threshold. An alert is generated indicating at least one of the formation and release of microbubbles proximate the pair of electrodes.
    Type: Grant
    Filed: May 1, 2012
    Date of Patent: December 22, 2015
    Assignee: Medtronic Ablation Frontiers LLC
    Inventors: Catherine R. Condie, Marshall L. Sherman, Mark T. Stewart
  • Publication number: 20150272655
    Abstract: A system and method for preventing unintended tissue damage from the delivery of unintended bipolar radiofrequency energy. The system may include a multi-electrode ablation device and an RF delivery unit. The RF delivery unit may transmit unipolar energy to the plurality of electrodes, the energy being in phase, with all electrodes delivering the same voltage and being activated at the same time to deliver no bipolar energy. Additionally or alternatively, the RF delivery unit may transmit bipolar energy to the electrodes. Here, voltage differences between each pair of adjacent electrodes may be monitored and the level of bipolar energy being delivered may be calculated. The voltage of energy delivered to at least one electrode in each adjacent electrode pair may be adjusted if the amount of delivered bipolar energy exceeds a safety threshold.
    Type: Application
    Filed: March 27, 2014
    Publication date: October 1, 2015
    Applicant: Medtronic Ablation Frontiers, LLC
    Inventors: Catherine R. CONDIE, Marshall L. SHERMAN
  • Patent number: 9095350
    Abstract: Systems and methods for assessing electrode position, including positioning a plurality of electrodes within a heart and proximate a pulmonary vein; obtaining an impedance measurement from each of the plurality of electrodes; determining whether any of the plurality of electrodes is located within the pulmonary vein based at least in part on the obtained impedance measurements; and generating an indication if at least one of the plurality of electrodes is determined to be located within the pulmonary vein.
    Type: Grant
    Filed: May 1, 2012
    Date of Patent: August 4, 2015
    Assignee: Medtronic Ablation Frontiers LLC
    Inventors: Catherine R. Condie, Marshall L. Sherman, Mark T. Stewart
  • Patent number: 9060778
    Abstract: A method and system for detecting a short circuit during a radiofrequency ablation procedure. The method includes measuring an impedance of a pair of electrodes coupled to a treatment assembly of a medical device. Radiofrequency ablation energy is transmitted between the pair of electrodes. The transmission of radiofrequency ablation energy between the pair of electrodes is terminated when after a predetermined period of time the measured impedance in either of the electrodes in the pair of electrodes is below a predetermined threshold impedance value. An alert is generated indicating a short circuit between the pair of electrodes.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: June 23, 2015
    Assignee: Medtronic Ablation Frontiers LLC
    Inventors: Catherine R. Condie, Marshall L. Sherman
  • Publication number: 20150157382
    Abstract: A cryoablation method, system, and device that allows for real-time and accurate assessment and monitoring of PV occlusion and lesion formation without the need for expensive imaging systems and without patient exposure to radiation. The system includes a cryoballoon catheter with a cryoballoon, a distal electrode, a proximal electrode, and a temperature sensor. Impedance measurements recorded by the electrodes may be used to predict ice formation, quality of pulmonary vein occlusion, and lesion formation.
    Type: Application
    Filed: December 4, 2014
    Publication date: June 11, 2015
    Inventors: Boaz AVITALL, Catherine R. CONDIE
  • Patent number: 9044245
    Abstract: A method of ablating an epicardial tissue region, including positioning a medical device adjacent the epicardial tissue region, the medical device having a first electrode, a second electrode, and a third electrode located in between the first and second electrodes; delivering an irrigation fluid to the tissue region; and ablating at least a portion of the tissue region by sequentially activating the third electrode in a monopolar radiofrequency delivery mode and activating the first and second electrodes in a bipolar radiofrequency delivery mode.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: June 2, 2015
    Assignee: Medtronic Ablation Frontiers LLC
    Inventors: Catherine R. Condie, Sarah E. Ahlberg
  • Patent number: 9039687
    Abstract: A method of assessing lesion quality of an ablated tissue region comprising ablating at least a portion of the tissue region. The reactance of the ablated tissue region is measured at a plurality of frequencies. The lesion quality of the ablated tissue region is determined based on the measured reactance. For example, an untreated tissue reactance value and a predetermined thermally treated tissue region reactance threshold may be determined. The measured reactance at each of the plurality of frequencies is compared to the threshold to determine the lesion quality of the thermally treated tissue region. The thermal treatment of the tissue may be modified based on the lesion quality determination.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: May 26, 2015
    Assignee: Medtronic Ablation Frontiers LLC
    Inventors: Catherine R. Condie, Kathryn Elaine Kasischke, Marshall L. Sherman
  • Patent number: 9011341
    Abstract: The present invention provides an apparatus for detecting and monitoring obstructive sleep apnea. The apparatus measures sinus tachycardia and a change in the atrial-ventricular conduction, and includes a controller for receiving the measurement of the sinus tachycardia and the change in the atrial-ventricular conduction to detect obstructive sleep apnea based upon the sinus tachycardia and the change in the atrial-ventricular conduction.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: April 21, 2015
    Assignee: Medtronic, Inc.
    Inventors: Donald N. Jensen, Catherine R. Condie, Yong K. Cho
  • Publication number: 20140296850
    Abstract: A method of ablating an epicardial tissue region, including positioning a medical device adjacent the epicardial tissue region, the medical device having a first electrode, a second electrode, and a third electrode located in between the first and second electrodes; delivering an irrigation fluid to the tissue region; and ablating at least a portion of the tissue region by sequentially activating the third electrode in a monopolar radiofrequency delivery mode and activating the first and second electrodes in a bipolar radiofrequency delivery mode.
    Type: Application
    Filed: June 13, 2014
    Publication date: October 2, 2014
    Inventors: Catherine R. CONDIE, Sarah E. AHLBERG
  • Publication number: 20130296679
    Abstract: Systems and methods for assessing electrode position, including positioning a plurality of electrodes within a heart and proximate a pulmonary vein; obtaining an impedance measurement from each of the plurality of electrodes; determining whether any of the plurality of electrodes is located within the pulmonary vein based at least in part on the obtained impedance measurements; and generating an indication if at least one of the plurality of electrodes is determined to be located within the pulmonary vein.
    Type: Application
    Filed: May 1, 2012
    Publication date: November 7, 2013
    Applicant: MEDTRONIC ABLATION FRONTIERS LLC
    Inventors: Catherine R. CONDIE, Marshall L. SHERMAN, Mark T. STEWART
  • Publication number: 20130296840
    Abstract: Systems and methods for assessing tissue contact, including positioning an electrode adjacent a tissue region; delivering radiofrequency energy to the electrode, wherein the delivered radiofrequency energy is sufficient to ablate at least a portion of the tissue region; obtaining a plurality of impedance measurements from the electrode during the delivery of the radiofrequency energy; calculating a change in the impedance measurements over a pre-determined time period; and generating an alert if the calculated change is less than a pre-defined value.
    Type: Application
    Filed: May 1, 2012
    Publication date: November 7, 2013
    Applicant: MEDTRONIC ABLATION FRONTIERS LLC
    Inventors: Catherine R. CONDIE, Marshall L. SHERMAN, Mark T. STEWART
  • Publication number: 20130296839
    Abstract: A method and system for detecting microbubble formation during a radiofrequency ablation procedure. The method includes measuring an impedance of a pair of electrodes, at least one electrode in the pair of electrodes being coupled to a treatment assembly of a medical device. Radiofrequency ablation energy is transmitted between the pair of electrodes. The transmission of radiofrequency ablation energy between the pair of electrodes is terminated when after a predetermined period of time the measured impedance in either of the electrodes in the pair of electrodes is a predetermined percentage above a measured minimum impedance and a measured power is above a predetermined power threshold. An alert is generated indicating at least one of the formation and release of microbubbles proximate the pair of electrodes.
    Type: Application
    Filed: May 1, 2012
    Publication date: November 7, 2013
    Applicant: MEDTRONIC ABLATION FRONTIERS LLC
    Inventors: Catherine R. CONDIE, Marshall L. SHERMAN, Mark T. STEWART
  • Publication number: 20130289551
    Abstract: A method and system for detecting a short circuit during a radiofrequency ablation procedure. The method includes measuring an impedance of a pair of electrodes coupled to a treatment assembly of a medical device. Radiofrequency ablation energy is transmitted between the pair of electrodes. The transmission of radiofrequency ablation energy between the pair of electrodes is terminated when after a predetermined period of time the measured impedance in either of the electrodes in the pair of electrodes is below a predetermined threshold impedance value. An alert is generated indicating a short circuit between the pair of electrodes.
    Type: Application
    Filed: April 26, 2012
    Publication date: October 31, 2013
    Applicant: MEDTRONIC ABLATION FRONTIERS LLC
    Inventors: Catherine R. CONDIE, Marshall L. SHERMAN
  • Publication number: 20120209127
    Abstract: The present invention provides a method and apparatus for detecting and monitoring obstructive sleep apnea. The apparatus measures sinus tachycardia and a change in the atrial-ventricular conduction, and includes a controller for receiving the measurement of the sinus tachycardia and the change in the atrial-ventricular conduction to detect obstructive sleep apnea based upon the sinus tachycardia and the change in the atrial-ventricular conduction.
    Type: Application
    Filed: April 26, 2012
    Publication date: August 16, 2012
    Inventors: Donald N. Jensen, Catherine R. Condie, Yong K. Cho
  • Publication number: 20120197243
    Abstract: A method of assessing a tissue ablation treatment, including positioning a medical device adjacent a target tissue; measuring a first impedance magnitude a first frequency with the medical device; measuring a first impedance phase at a second frequency with the medical device; ablating at least a portion of the target tissue with the medical device; measuring at second impedance magnitude at a third frequency with the medical device; measuring a second impedance phase at a fourth frequency with the medical device; comparing at least one of (i) the first and second impedance magnitudes and (ii) the first and second impedance phases; and providing an indication of the efficacy of the ablation treatment based at least in part on the comparison.
    Type: Application
    Filed: January 31, 2011
    Publication date: August 2, 2012
    Inventors: Marshall L. SHERMAN, Catherine R. CONDIE, Mark T. STEWART
  • Patent number: 8229560
    Abstract: In an implantable medical device that provides atrial and ventricular pacing in an atrial-based pacing mode, longer periods of time are permitted for intrinsic AV conduction to occur. By monitoring the patient's AV delay under these circumstances, useful information is obtained that can be correlated to other patient conditions or symptoms.
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: July 24, 2012
    Assignee: Medtronic, Inc.
    Inventor: Catherine R. Condie
  • Publication number: 20120172859
    Abstract: A method of ablating an epicardial tissue region, including positioning a medical device adjacent the epicardial tissue region, the medical device having a first electrode, a second electrode, and a third electrode located in between the first and second electrodes; delivering an irrigation fluid to the tissue region; and ablating at least a portion of the tissue region by sequentially activating the third electrode in a monopolar radiofrequency delivery mode and activating the first and second electrodes in a bipolar radiofrequency delivery mode.
    Type: Application
    Filed: January 5, 2011
    Publication date: July 5, 2012
    Applicant: MEDTRONIC ABLATION FRONTIERS LLC
    Inventors: Catherine R. CONDIE, Sarah E. AHLBERG