Patents by Inventor Ramesh Wariar

Ramesh Wariar 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: 11285327
    Abstract: This document discusses, among other things, systems and methods to receive physiologic information from a patient during different first and second pacing periods having respective, different first and second atrioventricular (AV) delays, determine first and second physiologic parameters using respective received physiologic information from the first and second pacing periods, and adjust the first AV delay using the determined first and second physiologic parameters, wherein the second AV delay is longer than the first AV delay.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: March 29, 2022
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Stephen J. Hahn, Pramodsingh Hirasingh Thakur, Qi An, Viktoria A. Averina, Krzysztof Z. Siejko, Ramesh Wariar
  • Patent number: 11235094
    Abstract: A system for dialysis is disclosed. An example peritoneal dialysis system includes a peritoneal dialysis machine including a pumping mechanism, and a sensor configured to measure a property of peritoneal dialysis fluid. The peritoneal dialysis system also includes a disposable cassette operable with the peritoneal dialysis machine. The disposable cassette includes a fluid source inlet for accepting fluid from a fluid source and a fluid flow path in fluid communication with the fluid source inlet. The fluid flow path includes a pump chamber operable with the pumping mechanism to pump fluid through the fluid flow path. The disposable cassette also includes a concentrate inlet for fluidly communicating concentrate to the fluid flow path, and a sensor chamber located along the fluid flow path and operable with the sensor. The sensor is configured to provide feedback to the peritoneal dialysis machine for mixing the concentrate for forming peritoneal dialysis fluid.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: February 1, 2022
    Assignees: Baxter International Inc.
    Inventors: Robert W. Childers, David S. Brown, Ramesh Wariar, Sujatha Karoor, Shahid Din, Leo Martis, Cody Buchmann, Paul Soltys
  • Patent number: 11198010
    Abstract: This document discusses, among other things, systems and methods to generate a first pacing waveform during a first pacing period and a second pacing waveform during a second pacing period, and alternate the first and second pacing periods to provide pacing-based hypertension therapy to a heart of a patient to reduce patient blood pressure, wherein the first pacing waveform has a first atrioventricular (AV) delay and the second pacing waveform has a second AV delay longer than the first AV delay. Physiologic information can be received from the patient, and one of the first or second pacing period for delivery to the patient can be determined using the received physiologic information.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: December 14, 2021
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Stephen J. Hahn, Pramodsingh Hirasingh Thakur, Qi An, Viktoria A. Averina, Krzysztof Z. Siejko, Ramesh Wariar
  • Patent number: 11172832
    Abstract: Systems and methods for assessing hemodynamic status of a patient experiencing atrial tachyarrhythmia such as an atrial fibrillation (AF) episode are disclosed. A system can comprise an atrial tachyarrhythmia detection circuit configured to detect an AF episode, a hemodynamic sensor circuit configured to sense at least one hemodynamic signal, and a hemodynamic status analyzer circuit that can calculate one or more signal metrics using the sensed hemodynamic signal during the AF episode. The hemodynamic status analyzer circuit can categorize the hemodynamic status of the patient into one of two or more categorical hemodynamic status levels which indicate elevated hemodynamic impact of the detected AF episode. A user interface can provide to an end-user a presentation of the categorized hemodynamic status level during AF.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: November 16, 2021
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Pramodsingh Hirasingh Thakur, Ramesh Wariar, Qi An, Barun Maskara, Yi Zhang
  • Patent number: 11141594
    Abstract: This document discusses, among other things, systems and methods to generate a first pacing waveform during a first pacing period and a second pacing waveform during a second pacing period, to alternate first and second pacing periods to provide pacing-based hypertension therapy to a heart of a patient to reduce patient blood pressure, and to determine an increased pacing rate for the first pacing waveform during the first pacing period using the first AV delay, wherein the first pacing waveform has a first atrioventricular (AV) delay and the second pacing waveform has a second AV delay longer than the first AV delay.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: October 12, 2021
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Stephen J. Hahn, Pramodsingh Hirasingh Thakur, Qi An, Viktoria A. Averina, Krzysztof Z. Siejko, Ramesh Wariar
  • Patent number: 11103709
    Abstract: Systems and methods for pacing cardiac conductive tissue are described. A medical system includes an electrostimulation circuit that may generate His-bundle pacing (HBP) pulses for delivery at or near the His bundle. In response to the delivery of the HBP pulse, the system senses a near-field cardiac activity representative of excitation of a para-Hisian myocardial tissue, and a far-field cardiac activity representative of excitation of the His bundle and a ventricle. The system classifies a tissue response to HBP into one of a plurality of capture types based on the sensed near-field and far-field cardiac activities. The system includes a control circuit to adjust one or more stimulation parameters based on the classified capture type. The electrostimulation circuit generates and delivers the HBP pulses according to the adjusted stimulation parameters to excite the His bundle.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: August 31, 2021
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Allan Charles Shuros, David Arthur Casavant, Ramesh Wariar
  • Patent number: 11071866
    Abstract: Systems and methods for pacing cardiac conductive tissue are described. A medical system includes electrostimulation circuit that may generate His-bundle pacing (HBP) pulses for delivery at or near the His bundle. A capture verification circuit may detect, from a far-field signal representing ventricular response to the HBP pulses, a His-bundle response representative of excitation of the His bundle directly resulting from the HBP pulses, and a myocardial response representative of excitation of the myocardium directly resulting from the HBP pulses. A control circuit may adjust one or more stimulation parameters based on the His-bundle response and myocardial response. The electrostimulation circuit may generate and deliver the HBP pulses according to the adjusted stimulation parameters to excite the His bundle.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: July 27, 2021
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: David Arthur Casavant, David L. Perschbacher, Ramesh Wariar, Stephen J. Hahn, Allan Charles Shuros
  • Patent number: 10849545
    Abstract: Embodiments herein include systems and methods for detecting, predicting and/or assessing acute kidney injury. In an embodiment, a monitoring system to detect acute kidney injury is included. The monitoring system can include a sensor circuit configured to collect renal data including at least one of systemic renal data, direct renal data, urinary tract data, and renal-relevant extracorporeal data. The monitoring system can also include a memory circuit to store collected renal data, an evaluation circuit to assess renal status, and a telemetry circuit. The evaluation circuit can determine whether acute kidney injury has occurred or is likely to occur by comparing the renal data to at least one of threshold values, personal historical values, patient population values and patterns indicative of acute kidney injury. The evaluation circuit can initiate a warning notification if acute kidney injury has occurred or is likely to occur. Other embodiments are also included herein.
    Type: Grant
    Filed: June 1, 2017
    Date of Patent: December 1, 2020
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Jeffrey E. Stahmann, Michael John Kane, Pramodsingh Hirasingh Thakur, Ramesh Wariar
  • Patent number: 10835751
    Abstract: Intermittent delivery of ventricular pacing pulses synchronized to occur during an atrial diastole time period can be used to provide atrial stretch therapy and augment the production and release of atrial natriuretic hormone.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: November 17, 2020
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Jeffrey E. Stahmann, Ramesh Wariar, Stephen B. Ruble
  • Publication number: 20200346023
    Abstract: Cardiac therapy devices in the form of pacemakers and/or defibrillators including one or more leads with electrodes implanted in a vein in a posterior position in combination with one or more leads with electrodes implanted in an anterior position. The posterior position may be chosen from one or more of the azygos, hemiazygos, accessory hemiazygos, or posterior intercostal veins. The anterior position may be chosen from the internal thoracic vein, an anterior intercostal vein, or an anterior subcutaneous location. In other examples, sensors are placed for use by a cardiac monitoring or therapy system in one or more of the internal thoracic vein, the azygos vein, the hemiazygos vein, the accessory hemiazygos vein, and/or an anterior or posterior intercostal vein.
    Type: Application
    Filed: July 16, 2020
    Publication date: November 5, 2020
    Applicant: CARDIAC PACEMAKERS, INC.
    Inventors: G. Shantanu Reddy, Eric Falbe Hammill, James O. Gilkerson, Ramesh Wariar, Pramodsingh Hirasingh Thakur
  • Patent number: 10751543
    Abstract: Cardiac therapy devices in the form of pacemakers and/or defibrillators including one or more leads with electrodes implanted in a vein in a posterior position in combination with one or more leads with electrodes implanted in an anterior position. The posterior position may be chosen from one or more of the azygos, hemiazygos, accessory hemiazygos, or posterior intercostal veins. The anterior position may be chosen from the internal thoracic vein, an anterior intercostal vein, or an anterior subcutaneous location. In other examples, sensors are placed for use by a cardiac monitoring or therapy system in one or more of the internal thoracic vein, the azygos vein, the hemiazygos vein, the accessory hemiazygos vein, and/or an anterior or posterior intercostal vein.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: August 25, 2020
    Assignee: CARDIAC PACEMAKERS, INC.
    Inventors: G. Shantanu Reddy, Eric Falbe Hammill, James O. Gilkerson, Ramesh Wariar, Pramodsingh Hirasingh Thakur
  • Patent number: 10750996
    Abstract: An apparatus comprises plurality of physiologic sensors and a processor circuit. The sensors provide sensor signals having physiological information and include a heart sound sensor and an impedance sensor. The processor circuit includes a volume index module configured to determine a value of at least one heart sound parameter using the heart sound signal and determine a value of at least one physiological impedance parameter value using the impedance signal, calculate a volume index representative of fluid volume status of the subject using the at least one heart sound parameter value and the at least one physiological impedance parameter value, compare a determined metric of the calculated volume index to one or more high threshold metric values and one or more low threshold metric values, and generate an indication of a fluid volume status of the subject according to the comparison.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: August 25, 2020
    Assignee: Cardiac Pacemakers, Inc.
    Inventor: Ramesh Wariar
  • Publication number: 20200196960
    Abstract: Various embodiment disclosed herein include a method for monitoring serum potassium in a patient. The method can include gathering cardiac electrogram data from the patient using two or more electrodes, separating the cardiac electrogram data into discrete subunits including a T-wave, aligning T-waves to create aligned discrete subunits, averaging the aligned discrete subunits to generate an average T-wave for the cardiac electrogram data, and determining a serum potassium value using the average T-wave for the cardiac electrogram data and a predetermined model relating T-wave values with serum potassium magnitudes.
    Type: Application
    Filed: December 20, 2019
    Publication date: June 25, 2020
    Inventors: Aleksandra Kharam, Ramesh Wariar
  • Publication number: 20200179706
    Abstract: An apparatus comprises a stimulus circuit configured to deliver electrical pacing therapy to a subject when operatively coupled to a plurality of electrodes, a heart sound sensing circuit configured to produce a sensed heart sound signal representative of mechanical cardiac activity, a control circuit operatively coupled to the stimulus circuit and configured to vary a paced heart rate of the subject according to a specified paced heart rate protocol, and a signal processing circuit. The signal processing circuit is configured to obtain measures of a heart sound parameter as a function of heart rate using the sensed heart sound signal and determine a critical heart rate for the subject using the obtained measures of the heart sound parameter.
    Type: Application
    Filed: December 3, 2019
    Publication date: June 11, 2020
    Inventors: Pramodsingh Hirasingh Thakur, James O. Gilkerson, Ramesh Wariar, Qi An
  • Patent number: 10555704
    Abstract: Systems and methods for managing machine-generated alerts of a medical event such as worsening heart failure (WHF) are described. A patient management system includes a patient database of information about a correspondence between a plurality of alert thresholds (ATHs) and corresponding clinical outcome indicators (COIs) for a plurality of patients. A control circuit can query the patient database for a matching patient that meets specific query criteria compared to a target patient, retrieve an ATH-COI correspondence associated with the matching patient, and determine the alert threshold using a user input of a COI and the retrieved ATH-COI correspondence. A medical event detector detects the medical event using physiological signals sensed from the target patient and the determined alert threshold.
    Type: Grant
    Filed: July 2, 2018
    Date of Patent: February 11, 2020
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Viktoria A. Averina, Pramodsingh Hirasingh Thakur, Ramesh Wariar, Qi An, Yi Zhang, Jeffrey E. Stahmann
  • Publication number: 20200022588
    Abstract: A hospitalization management system including a heart failure analyzer that receives diagnostic data including at least sensor data representative of one or more physiological signals sensed from a hospitalized patient using one or more sensors and assesses risk of rehospitalization for the patient using the diagnostic data. The outcome of the risk assessment is used during and following the patient's hospitalization for reducing the risk of rehospitalization.
    Type: Application
    Filed: September 30, 2019
    Publication date: January 23, 2020
    Inventors: Ramesh Wariar, Jeffrey E. Stahmann, Julie A. Thompson, Helen L. Reeve-Stoffer
  • Publication number: 20190344004
    Abstract: A system for dialysis is disclosed. An example peritoneal dialysis system includes a peritoneal dialysis machine including a pumping mechanism, and a sensor configured to measure a property of peritoneal dialysis fluid. The peritoneal dialysis system also includes a disposable cassette operable with the peritoneal dialysis machine. The disposable cassette includes a fluid source inlet for accepting fluid from a fluid source and a fluid flow path in fluid communication with the fluid source inlet. The fluid flow path includes a pump chamber operable with the pumping mechanism to pump fluid through the fluid flow path. The disposable cassette also includes a concentrate inlet for fluidly communicating concentrate to the fluid flow path, and a sensor chamber located along the fluid flow path and operable with the sensor. The sensor is configured to provide feedback to the peritoneal dialysis machine for mixing the concentrate for forming peritoneal dialysis fluid.
    Type: Application
    Filed: July 29, 2019
    Publication date: November 14, 2019
    Inventors: Robert W. Childers, David S. Brown, Ramesh Wariar, Sujatha Karoor, Shahid Din, Leo Martis, Cody Buchmann, Paul Soltys
  • Patent number: 10456049
    Abstract: An apparatus comprises plurality of sensors and a processor. Each sensor provides a sensor signal that includes physiological information and at least one sensor is implantable. The processor includes a physiological change event detection module that detects a physiological change event from a sensor signal and produces an indication of occurrence of one or more detected physiological change events, and a heart failure (HF) detection module. The HF detection module determines, using a first rule, whether the detected physiological change event indicative of a change in HF status of a subject, determines whether to override the first rule HF determination using a second rules, and declares whether the change in HF status occurred according to the first and second rules.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: October 29, 2019
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Yi Zhang, Jeffrey E. Stahmann, Krzysztof Z. Siejko, Ramesh Wariar, Julie A. Thompson, John D. Hatlestad, Kenneth C. Beck
  • Patent number: 10441179
    Abstract: A hospitalization management system including a heart failure analyzer that receives diagnostic data including at least sensor data representative of one or more physiological signals sensed from a hospitalized patient using one or more sensors and assesses risk of rehospitalization for the patient using the diagnostic data. The outcome of the risk assessment is used during and following the patient's hospitalization for reducing the risk of rehospitalization.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: October 15, 2019
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Ramesh Wariar, Jeffrey E. Stahmann, Julie A. Thompson, Helen L. Reeve-Stoffer
  • Publication number: 20190299002
    Abstract: This document discusses, among other things, systems and methods to receive physiologic information from a patient during different first and second pacing periods having respective, different first and second atrioventricular (AV) delays, determine first and second physiologic parameters using respective received physiologic information from the first and second pacing periods, and adjust the first AV delay using the determined first and second physiologic parameters, wherein the second AV delay is longer than the first AV delay
    Type: Application
    Filed: March 27, 2019
    Publication date: October 3, 2019
    Inventors: Stephen J. Hahn, Pramodsingh Hirasingh Thakur, Qi An, Viktoria A. Averina, Krzysztof Z. Siejko, Ramesh Wariar