Source: Annual Congress 2002 - Airway obstruction measurement (FOT - NEP) sleep and lung sound analysis
Disease area: Airway diseases

Abstract

Introduction: The forced oscillation techique (FOT) is a useful, non invasive test to measure mechanical impedance of respiratory sistem and not requires considerable patient cooperation compared to spirometric test. Aim of our study was to verify if the measure of reactance and the resistance by FOT technique can be used for screening differents type of obstructions. Material and Methods: we studied three groups of patients: simple snorers (group A), OSAS (group B) and COPD (group C). Diagnosis of Simple snorers or OSAS was made after a polisomnography (PSG). Group A, 9 M patients (mean age±]SD 59±]8 yr,), BMI=33±]13 Kg/m2, AHI=10±]0.5; FEV1=96±] 3%pred. Group B, 24 M patients (57±]11 yr), BMI=30±]5.6 Kg /m2, AHI =34±]16; FEV1= 90±]2%pred. Group C (56.8±]10.2 yr, 24 M) Weight=71.7±]10.5 kg; FEV1=48±]6%pred. Total respiratory resistance and reactance at 5 Hz (frequency of impulse generated by the oscillator) were performed by means of the FOT using a Masterscreen (Jaeger). Results R5= group A vs B (169% ±]67 vs 122%±]52; p<0.05, rispectively); C vs A (245%±]122 vs 169% ±]67; p<0.001); C vs B (245%±]122 vs 122%±]52; p<0.001).We didn't find any statistical difference in X5 values between groups. Conclusion: the measure of respiratory resistance at 5 Hz by FOT can be use for discriminate COPD patients, simple snorers and OSAS.

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Citations should be made in the following way:
R. Bossi, E. Bucchioni, M. Mastrangelo, C. Pravettoni, V. Fasano (Milan, Italy). Can the measure of reactance and resistance by forced oscillation technique (FOT) be used to identify differents type of obstructions?. Eur Respir J 2002; 20: Suppl. 38, 314

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