Application value of PSG in early identification of obesity hypoventilation syndrome in obese patients with obstructive sleep apnea
Objective To explore the value of applying polysomnography(PSG)in early identification of obesity hypoventilation syndrome in obese patients with obstructive sleep apnea.Methods 80 obese patients with obstructive sleep apnea were selected.The patients were divided into a control group(without obesity hypoventilation syndrome)and an observation group(with obesity hypoventilation syndrome)based on the presence or absence of obesity hypoventilation syndrome,with 40 cases in each group.Patients in both groups underwent overnight PSG monitoring in the sleep monitoring room.The results of PSG monitoring[apnea hypopnea index(AHI),lowest arterial oxygen saturation(SaO2),longest apnea time,systolic blood pressure,sleep rapid eye movement(REM)ratio and ratio of stage Ⅲ/Ⅳ non-rapid eye movement(NREM)]were compared between the two groups.Results In the observation group,AHI was(15.36±6.35)times/h,the lowest SaO2 was(53.15±15.36)%,the longest apnea time was(11.25±3.41)s,the systolic blood pressure was(115.84±10.65)mm Hg(1 mm Hg=0.133 kPa),the REM ratio was(26.45±2.41)%and the stage Ⅲ/Ⅳ NREM ratio was(11.65±3.65)%,which were significantly different from(11.35±5.26)times/h,(72.14±19.32)%,(7.28±2.35)s,(94.35±7.12)mm Hg,(23.45±2.54)%,and(14.55±3.45)%in the control group(P<0.05).Conclusion PSG has certain application value in early identification of obesity hypoventilation syndrome in obese patients with obstructive sleep apnea.PSG can evaluate parameters such as respiratory events,SaO2,and ventilation function in patients,helping to detect and intervene in obesity hypoventilation syndrome early,and improving the sleep quality and quality of life of patients.
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