Please download the dossier by clicking on the dossier button x
×

COMBINATION OF INERT GAS REBREATHING AND MULTIPLE-BREATH WASH-OUT TECHNIQUES FOR DETERMINATION OF INDICES OF VENTILATION INHOMOGENEITY

  • US 20110098589A1
  • Filed: 10/14/2010
  • Published: 04/28/2011
  • Est. Priority Date: 10/15/2009
  • Status: Active Grant
First Claim
Patent Images

1. A method to determine the lung clearance index (LCI) of a test subject, said method comprising the steps of:

  • rebreathing of an inert tracer gas to wash-in the inert tracer gas until a constant concentration of the inert tracer gas is reached;

    multiple-breath wash-out until the end-tidal tracer gas concentration has fallen below a predetermined fraction of the starting concentration;

    whereinthe lung clearance index (LCI) is determined in steps of;

    determining the functional residual capacity (FRC) by gas analysis alone from the inert gas rebreathing;

    determining the cumulative expired volume (VCE) required to clear the inert tracer gas concentration from the lungs below a predetermined fraction of the starting concentration;

    calculation of the LCI as the ratio between VCE and FRC.

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