Patents by Inventor Sameh Sowelam
Sameh Sowelam 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: 9247883Abstract: A medical device monitors a level of fluid accumulation, e.g., pulmonary edema, and one or more respiratory parameters of the patient to detect worsening heart failure. The medical device may use intrathoracic impedance measurements to monitor both the fluid accumulation and the one or more respiratory parameters. Respiration rate and volume, also referred to as the tidal volume, are examples of respiratory parameters. The medical device examines the one or more respiratory parameters after determining that the fluid accumulation indicates worsening heart failure. In this manner, the medical device uses the one or more respiratory parameters to confirm a determination of worsening heart failure that was made based on the fluid accumulation.Type: GrantFiled: January 15, 2014Date of Patent: February 2, 2016Assignee: Medtronic, Inc.Inventor: Sameh Sowelam
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Publication number: 20140128749Abstract: A medical device monitors a level of fluid accumulation, e.g., pulmonary edema, and one or more respiratory parameters of the patient to detect worsening heart failure. The medical device may use intrathoracic impedance measurements to monitor both the fluid accumulation and the one or more respiratory parameters. Respiration rate and volume, also referred to as the tidal volume, are examples of respiratory parameters. The medical device examines the one or more respiratory parameters after determining that the fluid accumulation indicates worsening heart failure. In this manner, the medical device uses the one or more respiratory parameters to confirm a determination of worsening heart failure that was made based on the fluid accumulation.Type: ApplicationFiled: January 15, 2014Publication date: May 8, 2014Inventor: Sameh Sowelam
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Patent number: 8632473Abstract: A medical device monitors a level of fluid accumulation, e.g., pulmonary edema, and one or more respiratory parameters of the patient to detect worsening heart failure. The medical device may use intrathoracic impedance measurements to monitor both the fluid accumulation and the one or more respiratory parameters. Respiration rate and volume, also referred to as the tidal volume, are examples of respiratory parameters. The medical device examines the one or more respiratory parameters after determining that the fluid accumulation indicates worsening heart failure. In this manner, the medical device uses the one or more respiratory parameters to confirm a determination of worsening heart failure that was made based on the fluid accumulation.Type: GrantFiled: January 30, 2009Date of Patent: January 21, 2014Assignee: Medtronic, Inc.Inventor: Sameh Sowelam
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Patent number: 8340750Abstract: The implantable medical device (IMD) system disclosed here utilizes one or more cardiac sensors that measure mechanical characteristics of the heart, such as left ventricular acceleration or right ventricular pressure. The raw sensor data is collected and processed by the IMD, which derives one or more mechanical event marker signals from features, traits, and characteristics of the sensor data waveforms. The mechanical event marker signals are wirelessly transmitted to an external monitor device for display.Type: GrantFiled: July 19, 2007Date of Patent: December 25, 2012Assignee: Medtronic, Inc.Inventors: Rajan Prakash, Sameh Sowelam, Thomas J. Mullen
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Patent number: 7941213Abstract: An IMD can be implanted into a patient to address various conditions. The IMD case and leads can have various electrodes and other portions to measure various physiological conditions. For example, a selected current can be generated between two electrodes, either external or internal in the patient, and a voltage can be measured by one or more electrodes of the IMD. A voltage can be measured at two or more locations to determine a relative motion of different electrodes. If the electrodes are in different portions of the heart, a determination can be made of a relative motion or position of the heart or portions of the heart.Type: GrantFiled: July 31, 2008Date of Patent: May 10, 2011Assignee: Medtronic, Inc.Inventors: H. Toby Markowitz, Phillip Falkner, Douglas A. Hettrick, Sameh Sowelam
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Patent number: 7896813Abstract: A system and method for monitoring in a patient includes producing sensor signals representative of a physiologic parameter associated with respiration. A periodic breathing cycle is detected based on the sensor signals. An output is produced as a function of the cycle length.Type: GrantFiled: March 31, 2006Date of Patent: March 1, 2011Assignee: Medtronic, Inc.Inventors: Sameh Sowelam, H. Toby Markowitz, Mark K. Erickson, Ioana Nicolaescu
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Publication number: 20100198097Abstract: A medical device monitors a level of fluid accumulation, e.g., pulmonary edema, and one or more respiratory parameters of the patient to detect worsening heart failure. The medical device may use intrathoracic impedance measurements to monitor both the fluid accumulation and the one or more respiratory parameters. Respiration rate and volume, also referred to as the tidal volume, are examples of respiratory parameters. The medical device examines the one or more respiratory parameters after determining that the fluid accumulation indicates worsening heart failure. In this manner, the medical device uses the one or more respiratory parameters to confirm a determination of worsening heart failure that was made based on the fluid accumulation.Type: ApplicationFiled: January 30, 2009Publication date: August 5, 2010Applicant: Medtronic, Inc.Inventor: Sameh Sowelam
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Patent number: 7676268Abstract: Medical systems and methods incorporate monitoring of at least two implanted markers, each of which is adapted to wirelessly transmit a signal in response to a wirelessly transmitted excitation signal; the response signals are converted into positional information for the two markers. The systems and methods further incorporate both, or one of, an implanted sensing member and/or an implanted therapy delivery device. Signals received from the sensing member may be collated with the positional information. A therapy delivered from the therapy delivery device may be adjusted according to the positional information.Type: GrantFiled: November 30, 2006Date of Patent: March 9, 2010Assignee: Medtronic, Inc.Inventors: Douglas A. Hettrick, Kenneth C. Gardeski, H. Toby Markowitz, Sameh Sowelam
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Publication number: 20090093857Abstract: An IMD can be implanted into a patient to address various conditions. The IMD case and leads can have various electrodes and other portions to measure various physiological conditions. For example, a selected current can be generated between two electrodes, either external or internal in the patient, and a voltage can be measured by one or more electrodes of the IMD. A voltage can be measured at two or more locations to determine a relative motion of different electrodes. If the electrodes are in different portions of the heart, a determination can be made of a relative motion or position of the heart or portions of the heart.Type: ApplicationFiled: July 31, 2008Publication date: April 9, 2009Inventors: H. Toby Markowitz, Phillip Falkner, Douglas A. Hettrick, Sameh Sowelam
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Publication number: 20090024045Abstract: The implantable medical device (IMD) system disclosed here utilizes one or more cardiac sensors that measure mechanical characteristics of the heart, such as left ventricular acceleration or right ventricular pressure. The raw sensor data is collected and processed by the IMD, which derives one or more mechanical event marker signals from features, traits, and characteristics of the sensor data waveforms. The mechanical event marker signals are wirelessly transmitted to an external monitor device for display.Type: ApplicationFiled: July 19, 2007Publication date: January 22, 2009Inventors: Rajan Prakash, Sameh Sowelam, Thomas J. Mullen
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Patent number: 7438686Abstract: The present invention relates to a device and method for monitoring for sleep disordered breathing or other types of disordered breathing such as Cheyne-Stokes breathing. More specifically, a device and method for detecting disordered breathing is provided that monitors a physiological parameter, which becomes cyclical due to apnea-hyperpnea (or arousal) alternation and provides the basis for the determination of a number of breathing disorder metrics.Type: GrantFiled: April 21, 2003Date of Patent: October 21, 2008Assignee: Medtronic, Inc.Inventors: Yong K Cho, Abed E. Lawabni, Todd J Sheldon, H T Markowitz, Sameh Sowelam, Raylene Pitschneider
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Publication number: 20080183083Abstract: A method for monitoring a patient includes measuring a series of consecutive pulse transit times (PTT's) of the patient, and processing the resulting PTT signal to detect a presence or absence of central sleep apnea (CSA). The method further includes determining an effectiveness of congestive heart failure therapy, which is being provided to the patient, based on the detected presence or absence of CSA. A system incorporating the method includes an electrode of an implantable medical device, which is adapted to pick up the patient's ventricular depolarization signals, a sensor, which is adapted to pick up peripheral arterial pulse signals of the patient, and a signal processor, which is adapted to receive the two types of signals and to process the signals according to the method. The system may provide the therapy via cardiac resynchronization pacing and, upon detection of CSA, the system may adjust at least one pacing parameter.Type: ApplicationFiled: January 31, 2007Publication date: July 31, 2008Inventors: H. Toby Markowitz, Sameh Sowelam
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Publication number: 20080132800Abstract: Medical systems and methods incorporate monitoring of at least two implanted markers, each of which is adapted to wirelessly transmit a signal in response to a wirelessly transmitted excitation signal; the response signals are converted into positional information for the two markers. The systems and methods further incorporate both, or one of, an implanted sensing member and/or an implanted therapy delivery device. Signals received from the sensing member may be collated with the positional information. A therapy delivered from the therapy delivery device may be adjusted according to the positional information.Type: ApplicationFiled: November 30, 2006Publication date: June 5, 2008Inventors: Douglas A. Hettrick, Kenneth C. Gardeski, H. Toby Markowitz, Sameh Sowelam
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Patent number: 7315759Abstract: Oxygen saturation data is monitored during a predefined window to obtain a measurement of circulation delay. The measured circulation delay is used as a basis for determining therapies, including overdrive pacing. In some embodiments, circulation delay is used to identify patients that will benefit from overdrive pacing as a therapy for sleep disordered breathing.Type: GrantFiled: September 21, 2004Date of Patent: January 1, 2008Assignee: Medtronic, Inc.Inventors: H. Toby Markowitz, Pooja Mehta, Chad T. Giese, Mark K. Erickson, Yong K. Cho, Marina Jovanovic, Sameh Sowelam
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Publication number: 20070239055Abstract: A system and method for monitoring in a patient includes producing sensor signals representative of a physiologic parameter associated with respiration. A periodic breathing cycle is detected based on the sensor signals. An output is produced as a function of the cycle length.Type: ApplicationFiled: March 31, 2006Publication date: October 11, 2007Inventors: Sameh Sowelam, H. Markowitz, Mark Erickson, Ioana Nicolaescu
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Patent number: 7203541Abstract: A system and automated method for assessing ventricular synchrony in ambulatory patients is provided including at least one mechanical sensor (e.g., accelerometer, tensiometric sensor, force transducer, and the like) operatively coupled to a first myocardial location in order to measure a wall motion signal of a first chamber, and a second mechanical sensor operatively coupled to a second myocardial location in order to measure a wall motion signal of a second chamber. The wall motion signals are processed in order to identify the time at which a fiducial (e.g., an inflection point, a threshold crossing, a maximum amplitude, etc.) occurs for each respective signal. The temporal separation between the fiducial points on each respective signal is measured as a metric of ventricular synchrony and can be optionally utilized to adjust pacing therapy timing to improve synchrony.Type: GrantFiled: March 12, 2004Date of Patent: April 10, 2007Assignee: Medtronic, Inc.Inventors: Sameh Sowelam, Todd J. Sheldon, Yong K. Cho
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Publication number: 20050251218Abstract: Oxygen saturation data is monitored during a predefined window to obtain a measurement of circulation delay. The measured circulation delay is used as a basis for determining therapies, including overdrive pacing. In some embodiments, circulation delay is used to identify patients that will benefit from overdrive pacing as a therapy for sleep disordered breathing.Type: ApplicationFiled: September 21, 2004Publication date: November 10, 2005Inventors: H. Markowitz, Pooja Mehta, Chad Giese, Mark Erickson, Yong Cho, Marina Jovanovic, Sameh Sowelam
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Publication number: 20050203579Abstract: A system and automated method for assessing ventricular synchrony in ambulatory patients is provided including at least one mechanical sensor (e.g., accelerometer, tensiometric sensor, force transducer, and the like) operatively coupled to a first myocardial location in order to measure a wall motion signal of a first chamber, and a second mechanical sensor operatively coupled to a second myocardial location in order to measure a wall motion signal of a second chamber. The wall motion signals are processed in order to identify the time at which a fiducial (e.g., an inflection point, a threshold crossing, a maximum amplitude, etc.) occurs for each respective signal. The temporal separation between the fiducial points on each respective signal is measured as a metric of ventricular synchrony and can be optionally utilized to adjust pacing therapy timing to improve synchrony.Type: ApplicationFiled: March 12, 2004Publication date: September 15, 2005Inventors: Sameh Sowelam, Todd Sheldon, Yong Cho
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Publication number: 20050119711Abstract: The present invention relates to a device and method for monitoring for sleep disordered breathing or other types of disordered breathing such as Cheyne-Stokes breathing. More specifically, a device and method for detecting disordered breathing is provided that monitors a physiological parameter, which becomes cyclical due to apnea-hyperpnea (or arousal) alternation and provides the basis for the determination of a number of breathing disorder metrics.Type: ApplicationFiled: April 21, 2003Publication date: June 2, 2005Inventors: Yong Cho, Abed Lawabni, Todd Sheldon, H. Markowitz, Sameh Sowelam, Raylene Pitschneider