Evaluation of the auto continuous positive airway pressure efficacy by upper airway pressure measurement.
The efficacy of auto continuous positive airway pressure (CPAP) was prospectively evaluated in 11 obstructive sleep apnea cases by the upper airway pressure measurement. Their apnea plus hypopnea index decreased from 68.3+/-20.2/h to 0.5+/-0.9/h during manually adjusted and 9.6+/-14.5/h during auto CPAP The intraesophageal pressure decreased from -88.0+/-34.0 cm H2O to 11.9+/-7.2 cm H2O during manually adjusted and -26.0+/-13.7 cm H2O during auto CPAP. The manually adjusted CPAP level was 9.1+/-1.7 cm H2O and the maximum pressure of the auto CPAP was 9.4+/-2.0 cm H2O. Auto CPAP could automatically detect the optimal CPAP level. However, the efficacy of the auto CPAP was less than that of the manually adjusted CPAP.
Miyazaki
S
S
Department of Otolaryngology, Akita University School of Medicine, Japan.
Itasaka
Y
Y
Ishikawa
K
K
Togawa
K
K
D000368:Aged; D000403:Airway Resistance / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017286:Polysomnography; D011175:Positive-Pressure Respiration; D011446:Prospective Studies; D012891:Sleep Apnea Syndromes / Q000503:physiopathology / Q000628:therapy*; D016896:Treatment Outcome