Resonance Characteristics of Pre-and Post -UPPP Operation in Patients with OSAHS / 听力学及言语疾病杂志

ABSTRACT

Objective To study the influence of UPPP on resonance characteristics of four resonance cavity in patients with OSAHS .Methods Using multi-channel voice analysis system to test the cavity resonance character-istics and energy distribution of 36 OSAHS patients (including pre - and post -operative) and 36 normal males when they speak /a/.The frequency spectrum was 4 000Hz(FR1 ,FR2 ,FR3 ,FR4 ) .Results FR2 energy values of the head cavity and mouth cavity of OSAHS patients heighten significantly after UPPP (P<0 .05);FR1 energy val-ues of head ,mouth and thoracic cavity were higher than that of in normal males'after UPPP(P<0 .05) .FR2 ,FR3 , FR4 energy values of head cavity ,FR2 ,FR3 energy values of mouth cavity ,FR2 energy values of thoracic cavity were lower than those of in normal males'after UPPP(P<0 .05) .Conclusion UPPP surgery removes the obstruction of the upper airway of OSAHS patients and changes the morphology of the pharynx ,thas changes the resonance charac-teristics of the head cavity and oral .