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).

  • Patent number: 11589767
    Abstract: 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: Grant
    Filed: August 8, 2019
    Date of Patent: February 28, 2023
    Assignees: 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
  • Publication number: 20230038471
    Abstract: 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: Application
    Filed: October 7, 2022
    Publication date: February 9, 2023
    Applicant: Board of Regents, The University of Texas System
    Inventors: Jonathan W. Valvano, John A. Pearce, Marc D. Feldman, Kaarthik Rajendran, John Porterfield, Anil Kottam, Wes Johnson
  • Patent number: 11478646
    Abstract: 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: Grant
    Filed: July 12, 2017
    Date of Patent: October 25, 2022
    Assignee: Board of Regents, The University of Texas System
    Inventors: Jonathan W. Valvano, John A. Pearce, Marc D. Feldman, Kaarthik Rajendran, John Porterfield, Anil Kottam, Wes Johnson
  • Publication number: 20190357805
    Abstract: 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: Application
    Filed: August 8, 2019
    Publication date: November 28, 2019
    Applicants: 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
  • Publication number: 20190298997
    Abstract: 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: Application
    Filed: July 12, 2017
    Publication date: October 3, 2019
    Applicant: Board of Regents, The University of Texas System
    Inventors: Jonathan W. Valvano, John A. Pearce, Marc D. Feldman, Kaarthik Rajendran, John Porterfield, Anil Kottam, Wes Johnson
  • Patent number: 10420952
    Abstract: 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: Grant
    Filed: October 10, 2012
    Date of Patent: September 24, 2019
    Assignees: 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
  • Patent number: 10376177
    Abstract: 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: Grant
    Filed: February 16, 2016
    Date of Patent: August 13, 2019
    Assignees: Admittance Technologies, Inc., Board of Regents, The University of Texas System
    Inventors: Jonathan W. Valvano, Marc D. Feldman, John Porterfield, John A. Pearce, Erik Larson, Lev Shuhatovich, Kathryn Loeffler, Raffaele Cetrulo
  • Patent number: 10368776
    Abstract: 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: Grant
    Filed: November 17, 2017
    Date of Patent: August 6, 2019
    Assignee: Board of Regents, The University of Texas System
    Inventors: Marc D. Feldman, Jonathan W. Valvano, John A. Pearce, Chia-Ling Wei
  • Patent number: 10076669
    Abstract: 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: Grant
    Filed: December 2, 2011
    Date of Patent: September 18, 2018
    Assignees: Admittance Technologies, Inc., Board of Regents, The University of Texas System
    Inventors: Marc D. Feldman, John Porterfield, Erik Larson, Jonathan W. Valvano, John A. Pearce
  • Publication number: 20180078169
    Abstract: 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: Application
    Filed: November 17, 2017
    Publication date: March 22, 2018
    Applicant: Board of Regents, The University of Texas System
    Inventors: Marc D. Feldman, John Porterfield, Karthik Raghavan, Jonathan W. Valvano, John A. Pearce
  • Publication number: 20180070851
    Abstract: 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: Application
    Filed: November 17, 2017
    Publication date: March 15, 2018
    Applicant: Board of Regents, The University of Texas System
    Inventors: Marc D. Feldman, Jonathan W. Valvano, John A. Pearce, Chia-Ling Wei
  • Patent number: 9820673
    Abstract: 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: Grant
    Filed: March 14, 2014
    Date of Patent: November 21, 2017
    Assignee: Board of Regents, The University of Texas System
    Inventors: Marc D. Feldman, John Porterfield, Karthik Raghavan, Jonathan W. Valvano, John A. Pearce
  • Patent number: 9820674
    Abstract: 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: Grant
    Filed: June 27, 2016
    Date of Patent: November 21, 2017
    Assignee: Board of Regents, The University of Texas System
    Inventors: Marc D. Feldman, Jonathan W. Valvano, John A. Pearce, Chia-Ling Wei
  • Publication number: 20160302691
    Abstract: 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: Application
    Filed: June 27, 2016
    Publication date: October 20, 2016
    Applicant: Board of Regents, The University of Texas System
    Inventors: Marc D. Feldman, Jonathan W. Valvano, John A. Pearce, Chia-Ling Wei
  • Publication number: 20160262653
    Abstract: 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: Application
    Filed: February 16, 2016
    Publication date: September 15, 2016
    Applicants: 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
  • Patent number: 9380946
    Abstract: 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: Grant
    Filed: January 5, 2015
    Date of Patent: July 5, 2016
    Assignee: Board of Regents, The University of Texas System
    Inventors: Marc D. Feldman, Jonathan W. Valvano, John A. Pearce, Chia-Ling Wei
  • Patent number: 9295404
    Abstract: 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: Grant
    Filed: March 20, 2012
    Date of Patent: March 29, 2016
    Assignees: Admittance Technologies, Inc., Board of Regents, The University of Texas System
    Inventors: Jonathan W. Valvano, Marc D. Feldman, John Porterfield, John A. Pearce, Erik Larson, Lev Shuhatovich, Kathryn Loeffler, Raffaele Cetrulo
  • Publication number: 20150119730
    Abstract: 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: Application
    Filed: January 5, 2015
    Publication date: April 30, 2015
    Applicant: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Marc D. Feldman, Jonathan W. Valvano, John A. Pearce, Chia-Ling Wei
  • Publication number: 20150119947
    Abstract: 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: Application
    Filed: January 2, 2015
    Publication date: April 30, 2015
    Applicant: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Marc D. Feldman, Jonathan W. Valvano, John A. Pearce
  • Patent number: 8929976
    Abstract: 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: Grant
    Filed: April 8, 2011
    Date of Patent: January 6, 2015
    Assignee: Board of Regents, The University of Texas System
    Inventors: Marc D. Feldman, Jonathan W. Valvano, John A. Pearce, Chia-Ling Wei