Patents by Inventor Jonathan W. Valvano
Jonathan W. Valvano 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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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
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Publication number: 20140257121Abstract: 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: March 14, 2014Publication date: September 11, 2014Applicant: 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: 8706219Abstract: 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: GrantFiled: January 28, 2010Date of Patent: April 22, 2014Assignee: 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: 20140100621Abstract: 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: ApplicationFiled: October 10, 2012Publication date: April 10, 2014Inventors: Mare D. Feldman, Erik R. Larson, John A. Pearce, Jonathan W. Valvano, John Porterfield
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Publication number: 20130023946Abstract: 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: March 20, 2012Publication date: January 24, 2013Inventors: 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: 20120150252Abstract: 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: ApplicationFiled: December 2, 2011Publication date: June 14, 2012Inventors: Marc D. Feldman, John Porterfield, Erik Larson, Jonathan W. Valvano, John A. Pearce
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Publication number: 20110196250Abstract: 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: April 8, 2011Publication date: August 11, 2011Inventors: Marc D. Feldman, Jonathan W. Valvano, John A. Pearce, Chia-Ling Wei
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Patent number: 7925335Abstract: An apparatus for determining cardiac performance in the patient involving a conductance catheter (12) for measuring conductance and blood volume in a heart chamber of the patient. The apparatus includes a processor (14) 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 (14) is in communication with the conductance catheter (12).Type: GrantFiled: September 3, 2004Date of Patent: April 12, 2011Assignee: 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: 20100280397Abstract: 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: January 28, 2010Publication date: November 4, 2010Inventors: Marc D. Feldman, John Porterfield, Karthik Raghavan, Jonathan W. Valvano, John A. Pearce
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Publication number: 20090210020Abstract: 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: December 14, 2006Publication date: August 20, 2009Inventors: Marc D. Feldman, Jonathan W. Valvano, John A. Pearce
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Publication number: 20080234588Abstract: An apparatus for determining cardiac performance in the patient involving a conductance catheter (12) for measuring conductance and blood volume in a heart chamber of the patient. The apparatus includes a processor (14) 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 (14) is in communication with the conductance catheter (12).Type: ApplicationFiled: September 3, 2004Publication date: September 25, 2008Inventors: Marc D. Feldman, Jonathan W. Valvano, John A. Pearce, Chia-Ling Wei
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Patent number: 6494832Abstract: An apparatus and method for determining cardiac performance in a patient. The apparatus includes a multifrequency conductance catheter for measuring instantaneous volume of a heart chamber with multifrequencies. The apparatus includes a mechanism for measuring instantaneous pressure of the heart chamber. The apparatus includes a mechanism for separating the multifrequencies. The apparatus includes a mechanism for signal processing the instantaneous volume and the pressure of the heart chamber to identify mechanical strength of the chamber and for automatically producing a plurality of desired waveforms at desired frequencies for the conductance catheter. The processing mechanism is connected to the pressure measuring mechanism, the separating mechanism and the volume measuring mechanism.Type: GrantFiled: August 28, 2000Date of Patent: December 17, 2002Assignee: Conductance Technologies, Inc.Inventors: Marc D. Feldman, Jonathan W. Valvano, John A. Pearce