Patents by Inventor Cecilia Q. Xi

Cecilia Q. Xi 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).

  • Systems and methods for activating and controlling impedance-based detection systems of implantable medical devices
    Patent number: 8380303
    Abstract: Techniques are provided for use with implantable medical devices for addressing encapsulation effects, particularly in the detection of cardiac decompensation events such as heart failure (HF) or cardiogenic pulmonary edema (PE.) In one example, during an acute interval following device implant, cardiac decompensation is detected using heart rate variability (HRV), ventricular evoked response (ER) or various other non-impedance-based parameters that are insensitive to component encapsulation effects. During the subsequent chronic interval, decompensation is detected using intracardiac or transthoracic impedance signals. In another example, the degree of maturation of encapsulation of implanted components is assessed using impedance frequency-response measurements or based on the frequency bandwidth of heart sounds or other physiological signals.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: February 19, 2013
    Assignee: Pacesetter, Inc.
    Inventors: Stuart Rosenberg, Cecilia Q. Xi, Yelena Nabutovsky, Brian J. Wenzel, Jong Gill, William Hsu
  • Systems and methods for activating and controlling impedance-based detection systems of implantable medical devices
    Patent number: 8295918
    Abstract: Techniques are provided for use with implantable medical devices for addressing encapsulation effects, particularly in the detection of cardiac decompensation events such as heart failure (HF) or cardiogenic pulmonary edema (PE.) In one example, during an acute interval following device implant, cardiac decompensation is detected using heart rate variability (HRV), ventricular evoked response (ER) or various other non-impedance-based parameters that are insensitive to component encapsulation effects. During the subsequent chronic interval, decompensation is detected using intracardiac or transthoracic impedance signals. In another example, the degree of maturation of encapsulation of implanted components is assessed using impedance frequency-response measurements or based on the frequency bandwidth of heart sounds or other physiological signals.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: October 23, 2012
    Assignee: Pacesetter, Inc.
    Inventors: Stuart Rosenberg, Cecilia Q. Xi, Yelena Nabutovsky, Brian J. Wenzel, Jong Gill, William Hsu