Polysomnographic analysis of 131 sleeping-snorers

Objective To investigate the role of polysomnography and nocturnal dynamic oximetry in diagnosis of obstructive sleep apnea hypopnea syndrome(OSAHS),and the value of body mass index(BMI)for evaluating sleep quality and oxygen saturation in patients with OSAHS.Methods One hundred and thirty-one patients suffering from snoring were divided into 4 groups:primary snoring(PS)group,mild,moderate and severe OSAHS groups.The parameters of PSG were compared among 4 groups.The correlations between apnea hypopnea index(AHI)and correlative parameters of SaO2(%),between BMI and parameters of PSG were analyzed.Results ①One hundred and two cases were diagnosed as OSAHS.There was significant difference among 4 groups in the frequency of apnea and hypopnea,duration of apnea,duration of hypopnea,AHI,the number of oxygen desaturation ≥3% and the percentage of time spent at SaO2 below 90%.②AHI was negatively correlated with SaO2 values,but positively with BMI in all patients.BMI was negatively correlated with SaO2 minimum values in all patients.Conclusion AHI and SaO2 minimum values should be combined for diagnosing OSAHS and estimating state of an illness.The frequency of apnea and hypopnea,duration of apnea,duration of hypopnea and AHI are reliable parameters in diagnosing OSAHS,while the percentage of time spent at SaO2 below 90% is a reference index.Obesity could be a risk factor in result of OSAHS.BMI may be regarded as a diagnosis value in OSAHS.