Patent ID: 8425428
Filing Date: 2013-04-23
Classification: A61B

Abstract:
1. A method performed by a nitric oxide (NO) monitoring system of determining exhaled nitric oxide (FENO) from a patient, the method comprising: collecting, by a patient breathing circuit, exhaled gases from the patient; measuring an exhalation flow rate of the exhaled gases as a function of time; determining an average exhalation flow rate of the exhaled gases based on the measured exhalation flow rate as a function of time; calculating a baseline correction factor that is a function of the measured FeNO concentration at the average exhalation flow rate and an FeNO concentration for a healthy person at the average exhalation flow rate; normalizing the measured FeNO concentration using the baseline correction factor to obtain a normalized FeNO; adjusting the normalized FeNO to a selected flow rate; and scaling back the normalized FeNO using the baseline correction factor to determine the FeNO of the patient.