Abstract
<b><br>Introduction:</b> Sleep is the physiological state of the body where proper morphology and duration are indispensable for human functions throughout both, physical and mental spheres. Disordered breathing during sleep impairs its morphology and results in major disorders in any age group. Adverse effects of Obstructive Sleep Apnea Syndrome in children and poor availability of centers offering children’s polysomnography call for a reliable and easily accessible screening method.</br> <b><br>Aim:</b> The aim of the study were to evaluate the usefulness of pulse transit time in the diagnostics of disordered sleep breathing in children and to attempt to employ the parameter in screening tests. Pulse transit time is a physiological parameter determining the time needed for the pulse wave to travel between two measurement points.</br> <b><br>Material and methods:</b> Enrolled in the retrospective study were 153 patients (100 boys and 53 girls) suspected of obstructive sleep apnea syndrome who underwent polysomnography at I. Mościcki ENT Hospital in Chorzów.</br> <b><br>Results:</b> Statistically significant relations between apnea/hypopnea index and pulse transit time were observed in both, individual age groups and all of the patients. Pulse transit time results proved a negative correlation with apnea/hypopnea index values commonly accepted as a parameter concluding the polysomnography procedures.</br> <b><br>Conclusions:</b> The results of the study indicate that pulse transit time measurements may find application in screening tests of sleep-disordered breathing in children.</br>
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