To the Editor:Obstructive sleep apnea(OSA)is a common sleep-disordered breathing.Previous studies reported that the incidence of daytime hypercapnia in patients with OSA was 26.2%in China[1]and 14%in Japan.[2]However,...To the Editor:Obstructive sleep apnea(OSA)is a common sleep-disordered breathing.Previous studies reported that the incidence of daytime hypercapnia in patients with OSA was 26.2%in China[1]and 14%in Japan.[2]However,Weitzenblum et al[3]demonstrated that daytime hypercapnia in patients with OSA might not be secondary to sleep apneas/hypopneas,but might due to the comorbidities,such as chronic obstructive pulmonary disease or severe obesity.Obesity hypoventilation syndrome(OHS)is defined as a conjunction of obesity(body mass index[BMI]≥30 kg/m^(2)),daytime hypercapnia(partial pressure of carbon dioxide in arterial blood[PaCO_(2)]≥45 mmHg)and sleep disordered breathing,after excluding other causes for alveolar hypoventilation.[4]Since patients with OHS were not completely excluded in previous studies,[1,2]we assumed that the incidence of daytime hypercapnia in Chinese patients with OSA might be low.展开更多
To the Editor： Obstructive sleep apnea syndrome （OSAS） is caused by recurrent episodes of complete or partial collapse of the upper airways during sleep and can induce apnea or hypopnea. Recurrent episodes of inter...To the Editor： Obstructive sleep apnea syndrome （OSAS） is caused by recurrent episodes of complete or partial collapse of the upper airways during sleep and can induce apnea or hypopnea. Recurrent episodes of intermittent hypoxia and higher carbon dioxide levels may lead to frequent interruption of sleep. Nocturnal enuresis （NE） is characterized by the involuntary and recurrent voiding of urine during sleep. NE is a symptom of childhood OSAS, while it is rare in adults. Monosymptomatic NE （MNE） is defined as NE without daytime symptoms. We report an adult woman with MNE associated with severe OSAS whose symptoms completely disappeared after nasal continuous positive airway pressure （CPAP） therapy.展开更多
基金supported by grant from the National Key Technology Research and Development Project(No.2013BAI09B10)from the Ministry of Science and Technology of China.
文摘To the Editor:Obstructive sleep apnea(OSA)is a common sleep-disordered breathing.Previous studies reported that the incidence of daytime hypercapnia in patients with OSA was 26.2%in China[1]and 14%in Japan.[2]However,Weitzenblum et al[3]demonstrated that daytime hypercapnia in patients with OSA might not be secondary to sleep apneas/hypopneas,but might due to the comorbidities,such as chronic obstructive pulmonary disease or severe obesity.Obesity hypoventilation syndrome(OHS)is defined as a conjunction of obesity(body mass index[BMI]≥30 kg/m^(2)),daytime hypercapnia(partial pressure of carbon dioxide in arterial blood[PaCO_(2)]≥45 mmHg)and sleep disordered breathing,after excluding other causes for alveolar hypoventilation.[4]Since patients with OHS were not completely excluded in previous studies,[1,2]we assumed that the incidence of daytime hypercapnia in Chinese patients with OSA might be low.
文摘To the Editor： Obstructive sleep apnea syndrome （OSAS） is caused by recurrent episodes of complete or partial collapse of the upper airways during sleep and can induce apnea or hypopnea. Recurrent episodes of intermittent hypoxia and higher carbon dioxide levels may lead to frequent interruption of sleep. Nocturnal enuresis （NE） is characterized by the involuntary and recurrent voiding of urine during sleep. NE is a symptom of childhood OSAS, while it is rare in adults. Monosymptomatic NE （MNE） is defined as NE without daytime symptoms. We report an adult woman with MNE associated with severe OSAS whose symptoms completely disappeared after nasal continuous positive airway pressure （CPAP） therapy.
