Patents by Inventor John A. Pearce
John A. Pearce 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: 11589767Abstract: An apparatus for measuring complex electrical admittance and/or complex electrical impedance in animal or human patients includes a first electrode and at least a second electrode which are adapted to be disposed in the patient. The apparatus includes a housing adapted to be disposed in the patient. The housing has disposed in it a stimulator in electrical communication with at least the first electrode to stimulate the first electrode with either current or voltage, a sensor in electrical communication with at least the second electrode to sense a response from the second electrode based on the stimulation of the first electrode, and a signal processor in electrical communication with the sensor to determine the complex electrical admittance or impedance of the patient.Type: GrantFiled: August 8, 2019Date of Patent: February 28, 2023Assignees: Board of Regents, The University of Texas System, Admittance Technologies, Inc.Inventors: Jonathan W. Valvano, Marc D. Feldman, John Porterfield, John A. Pearce, Erik Larson, Lev Shuhatovich, Kathryn Loeffler, Raffaele Cetrulo
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Publication number: 20230038471Abstract: An apparatus for monitoring a patient post operation having electrically conducting leads which are adapted to extend from inside the patient. The leads having electrodes adapted to communicate with a heart of the patient and apply electrical signals to the heart. The electrodes providing cardiac signals to the computer in response to the electrical signals so the computer can determine in real time at least one of heart volume, end diastolic heart volume, end systolic heart volume, stroke volume, change in heart volume, change in stroke volume, contractility, respiration rate or tidal volume regarding the patient.Type: ApplicationFiled: October 7, 2022Publication date: February 9, 2023Applicant: Board of Regents, The University of Texas SystemInventors: Jonathan W. Valvano, John A. Pearce, Marc D. Feldman, Kaarthik Rajendran, John Porterfield, Anil Kottam, Wes Johnson
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Patent number: 11478646Abstract: An apparatus for monitoring a patient post operation having electrically conducting leads which are adapted to extend from inside the patient. The leads having electrodes adapted to communicate with a heart of the patient and apply electrical signals to the heart. The electrodes providing cardiac signals to the computer in response to the electrical signals so the computer can determine in real time at least one of heart volume, end diastolic heart volume, end systolic heart volume, stroke volume, change in heart volume, change in stroke volume, contractility, respiration rate or tidal volume regarding the patient.Type: GrantFiled: July 12, 2017Date of Patent: October 25, 2022Assignee: Board of Regents, The University of Texas SystemInventors: Jonathan W. Valvano, John A. Pearce, Marc D. Feldman, Kaarthik Rajendran, John Porterfield, Anil Kottam, Wes Johnson
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Publication number: 20190357805Abstract: An apparatus for measuring complex electrical admittance and/or complex electrical impedance in animal or human patients includes a first electrode and at least a second electrode which are adapted to be disposed in the patient. The apparatus includes a housing adapted to be disposed in the patient. The housing has disposed in it a stimulator in electrical communication with at least the first electrode to stimulate the first electrode with either current or voltage, a sensor in electrical communication with at least the second electrode to sense a response from the second electrode based on the stimulation of the first electrode, and a signal processor in electrical communication with the sensor to determine the complex electrical admittance or impedance of the patient.Type: ApplicationFiled: August 8, 2019Publication date: November 28, 2019Applicants: Board of Regents, The University of Texas System, Admittance Technologies, Inc.Inventors: Jonathan W. Valvano, Marc D. Feldman, John Porterfield, John A. Pearce, Erik Larson, Lev Shuhatovich, Kathryn Loeffler, Raffaele Cetrulo
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Publication number: 20190298997Abstract: An apparatus for monitoring a patient post operation having electrically conducting leads which are adapted to extend from inside the patient. The leads having electrodes adapted to communicate with a heart of the patient and apply electrical signals to the heart. The electrodes providing cardiac signals to the computer in response to the electrical signals so the computer can determine in real time at least one of heart volume, end diastolic heart volume, end systolic heart volume, stroke volume, change in heart volume, change in stroke volume, contractility, respiration rate or tidal volume regarding the patient.Type: ApplicationFiled: July 12, 2017Publication date: October 3, 2019Applicant: Board of Regents, The University of Texas SystemInventors: Jonathan W. Valvano, John A. Pearce, Marc D. Feldman, Kaarthik Rajendran, John Porterfield, Anil Kottam, Wes Johnson
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Patent number: 10420952Abstract: An apparatus for treating a patient's heart includes a sensor for measuring hemodynamics of the heart. The apparatus includes a processing unit which receives the hemodynamics from the sensor and uses the hemodynamics to determine whether to shock the heart. A method for treating a patient's heart. The method includes the steps of measuring hemodynamics of the heart with a sensor. There is the step of receiving the hemodynamics from the sensor at a processing unit which uses the hemodynamics to determine whether to shock the heart.Type: GrantFiled: October 10, 2012Date of Patent: September 24, 2019Assignees: Board of Regents, The University of Texas System, Admittance Technologies, Inc.Inventors: Marc D. Feldman, Erik R. Larson, John A. Pearce, Jonathan W. Valvano, John Porterfield
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Patent number: 10376177Abstract: An apparatus for measuring complex electrical admittance and/or complex electrical impedance in animal or human patients includes a first electrode and at least a second electrode which are adapted to be disposed in the patient. The apparatus includes a housing adapted to be disposed in the patient. The housing has disposed in it a stimulator in electrical communication with at least the first electrode to stimulate the first electrode with either current or voltage, a sensor in electrical communication with at least the second electrode to sense a response from the second electrode based on the stimulation of the first electrode, and a signal processor in electrical communication with the sensor to determine the complex electrical admittance or impedance of the patient.Type: GrantFiled: February 16, 2016Date of Patent: August 13, 2019Assignees: Admittance Technologies, Inc., Board of Regents, The University of Texas SystemInventors: Jonathan W. Valvano, Marc D. Feldman, John Porterfield, John A. Pearce, Erik Larson, Lev Shuhatovich, Kathryn Loeffler, Raffaele Cetrulo
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Patent number: 10368776Abstract: An apparatus for determining cardiac performance in the patient includes a plurality of electrodes adapted to be placed in the patient and in communication with a heart chamber of the patient for measuring conductance and blood volume in the heart chamber of the patient; and a processor for determining instantaneous volume of the ventricle based on measurement of complex admittance at a plurality of frequencies to identify mechanical strength of the chamber, the processor in communication with the electrodes. A method for determining cardiac performance in a patient.Type: GrantFiled: November 17, 2017Date of Patent: August 6, 2019Assignee: Board of Regents, The University of Texas SystemInventors: Marc D. Feldman, Jonathan W. Valvano, John A. Pearce, Chia-Ling Wei
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Patent number: 10076669Abstract: An apparatus for treating a heart of a patient includes a first lead and at least a second lead for pacing the heart adapted to be in electrical communication with the heart. The apparatus includes a microcontroller in communication with the first and second leads which triggers the first lead at either different times or the same time from when the microcontroller triggers the second lead. Alternatively, the apparatus includes a microcontroller in communication with the first and second leads that determines heart volume, including stroke volume, end-systolic volume, and calculated values including ejection fraction, from admittance from signals from the first and second leads and uses the admittance as feedback to control heart volume ejected, as measured by stroke volume, calculated values such as ejection fraction, and control end-systolic volume, with respect to the first and second leads. A method for treating the heart of a patient.Type: GrantFiled: December 2, 2011Date of Patent: September 18, 2018Assignees: Admittance Technologies, Inc., Board of Regents, The University of Texas SystemInventors: Marc D. Feldman, John Porterfield, Erik Larson, Jonathan W. Valvano, John A. Pearce
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Publication number: 20180078169Abstract: An apparatus for determining tissue versus fluid components of an organ include a detector that generates a detector signal based on electrical signals derived from tissue and fluid. The apparatus includes a signal processor in communication with the detector which subtracts in real time a tissue component from the detector signal and produces a fluid volume signal. A method for monitoring a patient's fluid volume of a patient's organ. An apparatus for monitoring a patient's organ. A method for monitoring a patient's organ. A method to piggyback an admittance system onto a AICD/Bi-ventricular Pacemaker for a heart of a patient, in particular a weakened heart having features consistent with congestive heart failure. An apparatus for monitoring an organ, such as a heart, lungs, brain, skeletal muscle, and bladder of a patient which includes a detector which detects the admittance of the organ.Type: ApplicationFiled: November 17, 2017Publication date: March 22, 2018Applicant: Board of Regents, The University of Texas SystemInventors: Marc D. Feldman, John Porterfield, Karthik Raghavan, Jonathan W. Valvano, John A. Pearce
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Publication number: 20180070851Abstract: An apparatus for determining cardiac performance in the patient includes a plurality of electrodes adapted to be placed in the patient and in communication with a heart chamber of the patient for measuring conductance and blood volume in the heart chamber of the patient; and a processor for determining instantaneous volume of the ventricle based on measurement of complex admittance at a plurality of frequencies to identify mechanical strength of the chamber, the processor in communication with the electrodes. A method for determining cardiac performance in a patient.Type: ApplicationFiled: November 17, 2017Publication date: March 15, 2018Applicant: Board of Regents, The University of Texas SystemInventors: Marc D. Feldman, Jonathan W. Valvano, John A. Pearce, Chia-Ling Wei
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Patent number: 9820673Abstract: An implanted device for an organ of a patient including a housing. The device includes a detector having electrodes that have a varying distance over time between them which produces a detector signal based on electrical signals derived from the organ. The device includes a signal processor disposed in the housing in communication with the detector which determines admittance from the detector signal based on the varying distance over time between the electrodes. The device includes a drive circuit disposed in the housing to cause the electrodes to generate emitted electrical signals. A method for monitoring a patient's organ.Type: GrantFiled: March 14, 2014Date of Patent: November 21, 2017Assignee: Board of Regents, The University of Texas SystemInventors: Marc D. Feldman, John Porterfield, Karthik Raghavan, Jonathan W. Valvano, John A. Pearce
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Patent number: 9820674Abstract: An apparatus for determining cardiac performance in the patient includes a plurality of electrodes adapted to be placed in the patient and in communication with a heart chamber of the patient for measuring conductance and blood volume in the heart chamber of the patient; and a processor for determining instantaneous volume of the ventricle based on measurement of complex admittance at a plurality of frequencies to identify mechanical strength of the chamber, the processor in communication with the electrodes. A method for determining cardiac performance in a patient.Type: GrantFiled: June 27, 2016Date of Patent: November 21, 2017Assignee: Board of Regents, The University of Texas SystemInventors: Marc D. Feldman, Jonathan W. Valvano, John A. Pearce, Chia-Ling Wei
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Publication number: 20160302691Abstract: An apparatus for determining cardiac performance in the patient includes a plurality of electrodes adapted to be placed in the patient and in communication with a heart chamber of the patient for measuring conductance and blood volume in the heart chamber of the patient; and a processor for determining instantaneous volume of the ventricle based on measurement of complex admittance at a plurality of frequencies to identify mechanical strength of the chamber, the processor in communication with the electrodes. A method for determining cardiac performance in a patient.Type: ApplicationFiled: June 27, 2016Publication date: October 20, 2016Applicant: Board of Regents, The University of Texas SystemInventors: Marc D. Feldman, Jonathan W. Valvano, John A. Pearce, Chia-Ling Wei
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Publication number: 20160262653Abstract: An apparatus for measuring complex electrical admittance and/or complex electrical impedance in animal or human patients includes a first electrode and at least a second electrode which are adapted to be disposed in the patient. The apparatus includes a housing adapted to be disposed in the patient. The housing has disposed in it a stimulator in electrical communication with at least the first electrode to stimulate the first electrode with either current or voltage, a sensor in electrical communication with at least the second electrode to sense a response from the second electrode based on the stimulation of the first electrode, and a signal processor in electrical communication with the sensor to determine the complex electrical admittance or impedance of the patient.Type: ApplicationFiled: February 16, 2016Publication date: September 15, 2016Applicants: Board of Regents, The University of Texas System, Admittance Technologies, Inc.Inventors: Jonathan W. Valvano, Marc D. Feldman, John Porterfield, John A. Pearce, Erik Larson, Lev Shuhatovich, Kathryn Loeffler, Raffaele Cetrulo
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Patent number: 9380946Abstract: An apparatus for determining cardiac performance in the patient. The apparatus includes a conductance catheter for measuring conductance and blood volume in a heart chamber of the patient. The apparatus includes a processor for determining instantaneous volume of the ventricle by applying a non-linear relationship between the measured conductance and the volume of blood in the heart chamber to identify mechanical strength of the chamber. The processor is in communication with the conductance catheter. Methods for determining cardiac performance in a patient. Apparatuses for determining cardiac performance in a patient.Type: GrantFiled: January 5, 2015Date of Patent: July 5, 2016Assignee: Board of Regents, The University of Texas SystemInventors: Marc D. Feldman, Jonathan W. Valvano, John A. Pearce, Chia-Ling Wei
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Patent number: 9295404Abstract: An apparatus for measuring complex electrical admittance and/or complex electrical impedance in animal or human patients includes a first electrode and at least a second electrode which are adapted to be disposed in the patient. The apparatus includes a housing adapted to be disposed in the patient. The housing has disposed in it a stimulator in electrical communication with at least the first electrode to stimulate the first electrode with either current or voltage, a sensor in electrical communication with at least the second electrode to sense a response from the second electrode based on the stimulation of the first electrode, and a signal processor in electrical communication with the sensor to determine the complex electrical admittance or impedance of the patient.Type: GrantFiled: March 20, 2012Date of Patent: March 29, 2016Assignees: Admittance Technologies, Inc., Board of Regents, The University of Texas SystemInventors: Jonathan W. Valvano, Marc D. Feldman, John Porterfield, John A. Pearce, Erik Larson, Lev Shuhatovich, Kathryn Loeffler, Raffaele Cetrulo
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Publication number: 20150119730Abstract: An apparatus for determining cardiac performance in the patient. The apparatus includes a conductance catheter for measuring conductance and blood volume in a heart chamber of the patient. The apparatus includes a processor for determining instantaneous volume of the ventricle by applying a non-linear relationship between the measured conductance and the volume of blood in the heart chamber to identify mechanical strength of the chamber. The processor is in communication with the conductance catheter. Methods for determining cardiac performance in a patient. Apparatuses for determining cardiac performance in a patient.Type: ApplicationFiled: January 5, 2015Publication date: April 30, 2015Applicant: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEMInventors: Marc D. Feldman, Jonathan W. Valvano, John A. Pearce, Chia-Ling Wei
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Publication number: 20150119947Abstract: An apparatus for determining heart transplant rejection of a heart in a patient includes at least two electrodes adapted to be sewn into the heart that span the left ventricle. The apparatus includes a voltage generator adapted to be inserted in the patient which generates a voltage to the two electrodes and senses the resulting voltage from the two electrodes. A method for determining heart transplant rejection of a heart in a patient. A pacemaker for a patient (including bi-ventricular pacing and AICDs). The pacemaker includes an RV lead having four electrodes adapted to be inserted into the RV apex. The pacemaker includes a voltage generator which generates a voltage signal to the electrodes and senses the instantaneous voltage along the length of the RV and determines the real and imaginary components to remove the myocardial components of the septum and RV free wall to determine absolute RV blood volume. The pacemaker includes a battery connected to the voltage generator.Type: ApplicationFiled: January 2, 2015Publication date: April 30, 2015Applicant: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEMInventors: Marc D. Feldman, Jonathan W. Valvano, John A. Pearce
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Patent number: 8929976Abstract: An apparatus for determining cardiac performance in the patient. The apparatus includes a conductance catheter for measuring conductance and blood volume in a heart chamber of the patient. The apparatus includes a processor for determining instantaneous volume of the ventricle by applying a non-linear relationship between the measured conductance and the volume of blood in the heart chamber to identify mechanical strength of the chamber. The processor is in communication with the conductance catheter. Methods for determining cardiac performance in a patient. Apparatuses for determining cardiac performance in a patient.Type: GrantFiled: April 8, 2011Date of Patent: January 6, 2015Assignee: Board of Regents, The University of Texas SystemInventors: Marc D. Feldman, Jonathan W. Valvano, John A. Pearce, Chia-Ling Wei