Patents by Inventor Cheng-Li Que

Cheng-Li Que 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).

  • Phonospirometry for non-invasive monitoring of respiration
    Patent number: 6241683
    Abstract: To compensate for the poor signal-to-noise ratio when transforming a patient tracheal sound signal into a respiration flow signal, the transformed signal is used when the sound signal is above a threshold, and interpolated values are used when the sound signal is below the threshold. A volume of breath signal is reliably obtained. Respiration start/stop is detected either by analyzing the sound signal or by physical measurement of the patient. A wearable device incorporating the sound signal processing method can provide an immediate indication or alarm when the volume of breath signal indicates a condition requiring medical attention.
    Type: Grant
    Filed: February 22, 1999
    Date of Patent: June 5, 2001
    Assignees: Institut de recherches cliniques de Montréal (IRCM), McGill University
    Inventors: Peter T. Macklem, Cheng-Li Que, Suzanne M. Kelly, Krzystof Kolmaga, Louis-Gilles Durand