[Clinical usefulness of a cardiopulmonary sleep study in patients with sleep apnea syndrome].
Although polysomnography is indispensable in the diagnosis of sleep apnea syndrome (SAS), a common disease in Japan, it is a time-consuming procedure. We therefore assessed the clinical usefulness of a cardiopulmonary sleep study (CPSS), which monitors indices of respiratory and circulatory kinetics during sleep. Of ninety male patients (50 +/- 11 years old, BMI: 27 +/- 4), those with apnea indices (AI) > 5, as determined using an apnomonitor, underwent CPSS with a Night Watch System. Sixty-nine patients with indications for nasal CPAP (NCPAP) therapy underwent overnight CPSS and the optimum pressure was determined. AI was 31 +/- 17, whereas CPSS showed an apnea-hypopnea index of 49 +/- 24, a mean SaO2 of 93 +/- 3%, and a minimum SaO2 of 71 +/- 11%, indicating severe OSAS. The mean optimum pressure was 10 +/- 2 cm H2O, and the compliance was 86%, which was comparatively good. As CPSS can be performed on many patients in a short time, it may be useful for the early diagnosis and initial treatment of SAS.
Akahoshi
Toshiki
T
First Department of Internal Medicine, Nihon University School of Medicine, Tokyo, 173-0032 Japan.
Akashiba
Tsuneto
T
Kawahara
Seiji
S
Horie
Takashi
T
D000328:Adult; D006801:Humans; D008297:Male; D008875:Middle Aged; D018670:Monitoring, Ambulatory / Q000379:methods*; D017286:Polysomnography; D011175:Positive-Pressure Respiration; D012890:Sleep / Q000502:physiology*; D012891:Sleep Apnea Syndromes / Q000175:diagnosis* / Q000503:physiopathology / Q000628:therapy