Patents by Inventor Paul F. Emerson
Paul F. Emerson 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).
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Patent number: 11083372Abstract: A system includes an implantable medical device configured to sense a sync signal and sense physiological parameters to obtain a physiological signal. In response to sensing the sync signal, the implantable medical device is configured to generate a sync-stamped physiological signal. In certain embodiments, a method includes receiving a first physiological signal coupled with a sync signal; receiving a second physiological signal coupled with the sync signal; and, using the sync signal, synchronizing in time the first and second physiological signals.Type: GrantFiled: January 7, 2017Date of Patent: August 10, 2021Assignee: Cardiac Pacemakers, Inc.Inventors: Pramodsingh H. Thakur, David J. Ternes, Keith R. Maile, Zhe Shen, Stephen B. Ruble, Howard D. Simms, Paul F. Emerson
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Publication number: 20170196457Abstract: A system includes an implantable medical device configured to sense a sync signal and sense physiological parameters to obtain a physiological signal. In response to sensing the sync signal, the implantable medical device is configured to generate a sync-stamped physiological signal. In certain embodiments, a method includes receiving a first physiological signal coupled with a sync signal; receiving a second physiological signal coupled with the sync signal; and, using the sync signal, synchronizing in time the first and second physiological signals.Type: ApplicationFiled: January 7, 2017Publication date: July 13, 2017Inventors: Pramodsingh H. Thakur, David J. Ternes, Keith R. Maile, Zhe Shen, Stephen B. Ruble, Howard D. Simms, Paul F. Emerson
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Patent number: 9295405Abstract: A patient-specific model can show changes in cardiac stroke volume or cardiac output, such as to predict heart failure or to indicate cardiac remodeling. The patient-specific model can be derived from a surrogate indication of a cardiac stroke volume, such as a physical activity level, and features obtained from a thoracic impedance waveform, such as mean or peak-to-peak impedance values. In an example, several models corresponding to different patient physical activity levels can be determined.Type: GrantFiled: March 28, 2012Date of Patent: March 29, 2016Assignee: Cardiac Pacemakers, Inc.Inventors: Paul F. Emerson, Pramodsingh Hirasingh Thakur, Yan Zou
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Patent number: 8936556Abstract: A respiration pattern of a number of respiration cycles is detected and breath intervals (BI) and tidal volume (TVOL) measurements of each of the respiration cycles are respectively determined. An unevenly sampled instantaneous minute ventilation (iMV) signal is produced using the BI and TVOL measurements, and an evenly sampled iMV signal (resampled iMV signal) is produced using the unevenly sampled iMV signal. Disordered breathing is detected based on a comparison between a baseline threshold and the resampled iMV signal.Type: GrantFiled: September 22, 2009Date of Patent: January 20, 2015Assignee: Cardiac Pacemakers, Inc.Inventors: Kent Lee, Yi Zhang, Paul F. Emerson, Jesse W. Hartley, John D. Hatlestad, Jonathan T. Kwok, Weiguang Shao
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Patent number: 8914107Abstract: A cardiac rhythm management (CRM) device can extract ventilation information from thoracic impedance or other information, and adjust a delivery rate of the CRM therapy. A tidal volume of a patient is measured and used to adjust a ventilation rate response factor. The measured tidal volume can optionally be adjusted using a ventilation rate dependent adjustment factor. The ventilation rate response factor can also be adjusted using a maximum voluntary ventilation (MVV), an age predicted maximum heart rate, a resting heart rate, and a resting ventilation determined for the patient. In various examples, a global ventilation sensor rate response factor (for a population) can be programmed into the CRM device, and automatically tailored to be appropriate for a particular patient.Type: GrantFiled: May 20, 2010Date of Patent: December 16, 2014Assignee: Cardiac Pacemakers, Inc.Inventors: Paul F. Emerson, Gary T. Seim, Michael A. Querimit, Donald L. Hopper, Stephen R. Pitzl, Daniel O'Brien
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Patent number: 8538526Abstract: A rate-adaptive pacemaker and a method for its operation in which the response factor for a minute ventilation sensor or other type of exertion level sensor is automatically set during a parameter adjustment mode that utilizes an activity level measurement to determine when the patient is at a target activity level with which is associated an appropriate target pacing rate. In a preferred embodiment, the target activity level corresponds to casual walking (e.g., 2 mph at a 4% grade) with a target pacing rate selected as appropriate for that level of activity in the individual patient.Type: GrantFiled: December 16, 2010Date of Patent: September 17, 2013Assignee: Cardiac Pacemakers, Inc.Inventors: Jeffrey E. Stahmann, Michael A. Querimit, Donald L. Hopper, Brian Ralph Larson, Paul F. Emerson, Daniel O'Brien
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Publication number: 20120271177Abstract: A patient-specific model can show changes in cardiac stroke volume or cardiac output, such as to predict heart failure or to indicate cardiac remodeling. The patient-specific model can be derived from a surrogate indication of a cardiac stroke volume, such as a physical activity level, and features obtained from a thoracic impedance waveform, such as mean or peak-to-peak impedance values. In an example, several models corresponding to different patient physical activity levels can be determined.Type: ApplicationFiled: March 28, 2012Publication date: October 25, 2012Inventors: Paul F. Emerson, Pramodsingh Hirasingh Thakur, Yan Zou
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Publication number: 20110152963Abstract: A rate-adaptive pacemaker and a method for its operation in which the response factor for a minute ventilation sensor or other type of exertion level sensor is automatically set during a parameter adjustment mode that utilizes an activity level measurement to determine when the patient is at a target activity level with which is associated an appropriate target pacing rate. In a preferred embodiment, the target activity level corresponds to casual walking (e.g., 2 mph at a 4% grade) with a target pacing rate selected as appropriate for that level of activity in the individual patient.Type: ApplicationFiled: December 16, 2010Publication date: June 23, 2011Inventors: Jeffrey E. Stahmann, Michael A. Querimit, Donald L. Hopper, Brian Ralph Larson, Paul F. Emerson, Daniel O'Brien
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Publication number: 20100305643Abstract: A cardiac rhythm management (CRM) device can extract ventilation information from thoracic impedance or other information, and adjust a delivery rate of the CRM therapy. A tidal volume of a patient is measured and used to adjust a ventilation rate response factor. The measured tidal volume can optionally be adjusted using a ventilation rate dependent adjustment factor. The ventilation rate response factor can also be adjusted using a maximum voluntary ventilation (MVV), an age predicted maximum heart rate, a resting heart rate, and a resting ventilation determined for the patient. In various examples, a global ventilation sensor rate response factor (for a population) can be programmed into the CRM device, and automatically tailored to be appropriate for a particular patient.Type: ApplicationFiled: May 20, 2010Publication date: December 2, 2010Inventors: Paul F. Emerson, Gary T. Seim, Michael A. Querimit, Donald L. Hopper, Stephen R. Pitzl, Daniel O'Brien
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Publication number: 20100100000Abstract: A respiration pattern of a number of respiration cycles is detected and breath intervals (BI) and tidal volume (TVOL) measurements of each of the respiration cycles are respectively determined. An unevenly sampled instantaneous minute ventilation (iMV) signal is produced using the BI and TVOL measurements, and an evenly sampled iMV signal (resampled iMV signal) is produced using the unevenly sampled iMV signal. Disordered breathing is detected based on a comparison between a baseline threshold and the resampled iMV signal.Type: ApplicationFiled: September 22, 2009Publication date: April 22, 2010Inventors: Kent Lee, Yi Zhang, Paul F. Emerson, Jesse W. Hartley, John D. Hatlestad, Jonathan T. Kwok, Weiguang Shao
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Patent number: 6644310Abstract: An apparatus and method for treating sleep apnea includes a bilevel flow generator having an alternating current (AC) synchronous motor coupled to a low inertia centrifugal rotor/impeller. The process of acceleration and deceleration of the rotor involves moving from frequency A, amplitude A to frequency B, amplitude B in an optimal linear fashion using the so-called Bresenham algorithm. This is coupled with a tuned increase of the amplitude during the acceleration process which will produce the acceleration using minimum current allowing the use of smaller power supplies. During deceleration the process is accomplished in reverse fashion using a tuned decrease of the amplitude coupled with a special shunt circuit to prevent power supply voltage changes. These changes in amplitude overlay a current feedback mechanism used to prevent loss of synchronization of the motor by changing amplitude. Speed changes can also be timed so as to prevent desynchronization.Type: GrantFiled: September 29, 2000Date of Patent: November 11, 2003Assignee: Mallinckrodt Inc.Inventors: Alain J. Delache, Jacques Souquet, Paul F. Emerson, James L. Campbell
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Patent number: 6546930Abstract: An apparatus for delivering a breathing gas to a patient includes a display, a storage device programmed to hold different purge hole leak profiles for a variety of mask types, and a selection mechanism for selecting one of the profiles so that accurate values of tidal volume, excess leak and peak flow may be calculated and shown on the display. The displayed excess leak value can be used to correct the fit of the mask.Type: GrantFiled: September 29, 2000Date of Patent: April 15, 2003Assignee: Mallinckrodt Inc.Inventors: Paul F. Emerson, Bradley J. Bonnette, Gary L. Hansen
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Patent number: 5662806Abstract: An improved on-line real time hemodialysis monitoring system for hemodialysis treatment. The hemodialysis monitoring system quantitates the rate and amount of a constituent, such as urea, removed during the hemodialysis treatment by measuring the constituent concentrations as a function of time in the spent dialysate effluent from a hemodialysis machine. A quantity of the spent dialysate effluent is removed from the dialysate effluent waste line periodically for testing. A urea concentration time profile can be analyzed to determined the urea removal, KT/V, URR, SRI and normalized protein catabolic rate (nPCR) indices. The hemodialysis monitoring system preferably can obtain a dialysate sample equilibrated with the blood prior to the start of a hemodialysis treatment. The hemodialysis monitoring system includes a two pool analysis for taking into account the constituent concentration differences in the extracellular and intracellular spaces in the hemodialysis patient during the hemodialysis treatment.Type: GrantFiled: April 29, 1996Date of Patent: September 2, 1997Assignee: Baxter International Inc.Inventors: Prakash Keshaviah, James P. Ebben, Paul F. Emerson, David A. Luhring
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Patent number: 5518623Abstract: An improved on-line real time hemodialysis monitoring system for hemodialysis treatment. The hemodialysis monitoring system quantitates the rate and amount of a constituent, such as urea, removed during the hemodialysis treatment by measuring the constituent concentrations as a function of time in the spent dialysate effluent from a hemodialysis machine. A quantity of the spent dialysate effluent is removed from the dialysate effluent waste line periodically for testing. A urea concentration time profile can be analyzed to determined the urea removal, KT/V, URR, SRI and normalized protein catabolic rate (nPCR) indices. The hemodialysis monitoring system preferably can obtain a dialysate sample equilibrated with the blood prior to the start of a hemodialysis treatment. The hemodialysis monitoring system includes a two pool analysis for taking into account the constituent concentration differences in the extracellular and intracellular spaces in the hemodialysis patient during the hemodialysis treatment.Type: GrantFiled: May 9, 1994Date of Patent: May 21, 1996Assignee: Baxter International Inc.Inventors: Prakash Keshaviah, James P. Ebben, Paul F. Emerson, David A. Luhring