Patent ID: 8985108
Filing Date: 2015-03-24
Classification: A61M,A62B

Abstract:
1. A method for indicating fit status of a mask in pneumatic communication with a respiratory assistance device, the method comprising: initiating a therapeutic gas delivery from the respiratory assistance device over a first conduit to the mask; receiving a first pressure measurement at a blower of the respiratory assistance device, the first pressure measurement being received from a first sensor in line with the first conduit; receiving a second pressure measurement at the mask, the second pressure measurement being received from a second sensor in pneumatic communication with the mask over a second conduit; deriving a leakage value from the received first and second pressure measurements; assigning a mask fit index based at least upon a correlation of the leakage value to a particular sub-range of predetermined leakage values that corresponds to the mask fit index, the particular sub-range of predetermined leakage values being among a plurality of the sub-ranges which together comprises an overall mask fit range defined at least by an ideal mask fit region, a loose mask fit region, and a tight mask fit region; and generating an output of a mask fit status to an indicator interface, the mask fit status being based upon the assigned mask fit index.