Impulse Oscillometric Measurements
Airway resistance measurements were performed with the Jager
MasterScreen-IOS system (Jaeger Co, Wurzberg, Germany). The patients
were seated and rested 15 minutes before the test. They were told to
hold the mouthpiece between their teeth and seal their lips around it
tightly. Then they breathed calmly through the mouthpiece and bacterial
filter attached to the pneumotograph. Measurements were made while the
patients were in a sitting position, necks slightly extended. The
subjects wore a nose clip and their cheeks were supported by the
parents. Several breathing cycles that lasted for at least 30 seconds
were recorded11. Three acceptable measurements were
obtained for each subject and the mean of the values were taken.
Airway resistance (R / resistance) and elasticity capacity (X /
reactance) are are measured at difference frequencies and resistance
(R5, R10, R15) and reactance (X5, X10, X15) values were recorded at
frequencies of 5,10,15 and 20 Hz.