Patent ID: 9668673
Date: 2017-06-06
CPC Classifications: A61B

Claim:
1. A method of automatically predicting acute airway events in respiratory patients having asthma or chronic obstructive bronchopneumopathy (BPCO), comprising the steps of measuring the respiratory impedance of a human subject by a forced oscillation technique device during a plurality of respiratory cycles of said human subject where said respiratory impedance comprises a real part and an imaginary part; said step of measuring the respiratory impedance taking place two times per day to provide a plurality of measurements; calculating, using a suitably programmed computer, a relative variation of said imaginary part of said plurality of measurements characterized in that said relative variation of said imaginary part, is calculated in accordance with the following formula: Where P is the respiratory parameter and P1, P2, indicate the value of P calculated from two measurements made at two different moments during the day; evaluating, using the computer, a probability of respiratory pathology presence in the subject under examination when the variation of the imaginary part of said respiratory impedance during inspiration is greater than 35%; calculating, using the computer, over at least 4 days, a coefficient of variation of the real part of said impedance; predicting, using the computer, a relapse of the acute airway event in the patient under examination within an established future time window, once the presence of the pathology has been ascertained, if the coefficient of variation of the real part of said impedance is greater than 0.4; outputting, using the computer, a graphical representation of the predicted relapse.