Patent ID: 8333111
Filing Date: 2012-12-18
Classification: A61B,G01F,G01N

Abstract:
1. A method for determining a sample flow volume comprising: withdrawing a sample flow at a first and second flow rate from a gas flow; measuring a concentration of at least one gas component of the sample flow; measuring at least one of an airway pressure and flow of said gas flow when withdrawing at said first and second flow rate; generating first measurement results based on said measuring the concentration; generating second measurement results based on said measuring at least one of said airway pressure and flow; setting a suitable point of comparison both among said first and second measurement results; determining a first time delay between said point of comparison of said first and second measurement results of said first flow rate; determining a second time delay between said point of comparison of said first and second measurement results of said second flow rate; providing information about said first and second flow rate; and determining the sample volume based on differences between the first and second time delay.