×

Leak determination in a breathing assistance system

  • US 10,463,819 B2
  • Filed: 12/28/2015
  • Issued: 11/05/2019
  • Est. Priority Date: 02/10/2010
  • Status: Active Grant
First Claim
Patent Images

1. A breathing assistance system including a ventilation device for delivering respiratory gases to a patient, the breathing assistance system having a controller for estimating a leak flow by:

  • monitoring a flow of gas between the ventilation device and the patient, wherein the monitored flow of gas is represented by a flow waveform;

    determining a first flow rate for a first period of the flow waveform;

    determining a second flow rate for at least a second period of the flow waveform;

    defining a steady phase portion of the flow waveform to include the first period and the second period when the second flow rate varies from the first flow rate by less than a predetermined amount;

    determining an estimated leak flow based on the steady phase portion of the flow waveform; and

    in response to determining the estimated leak flow, controlling at least one of one or more operational parameters to target a positive end expiratory pressure (PEEP).

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×