Patents Assigned to Harvard: The President and Fellows of Harvard College
  • Flow restrictor for measuring respiratory parameters
    Patent number: 6224560
    Abstract: A flow restrictor is applied to a respiration-channeling device such as a tracheostomy tube, a mouthpiece, or a face mask. The flow restrictor creates a pressure differential which varies with volume flow rate. A pressure reading is taken on either side of the flow restrictor in the respiration-channeling device and from this, a volume flow rate is determined. A data acquisition device is used to derive further pulmonary function parameters from the volume flow rate.
    Type: Grant
    Filed: September 11, 1998
    Date of Patent: May 1, 2001
    Assignee: Harvard: The President and Fellows of Harvard College
    Inventors: Gopala Krishna Murthy Gazula, John J. Godleski