title: [Recording ventilation during sleep using pneumotachography: drawbacks and disadvantages].
abstract: Pneumotachographic recording of ventilation requires an air-tight nasobuccal face-mask which might disturb the subjects' sleep and thereby modify their breathing pattern. In a cross-over randomised study we compared recordings obtained with and without a face-mask in 20 healthy normal volunteers (10 males, 10 females, mean age = 21.7 +/- S.E.M. = 0.5). The sleep modifications that resulted from the presence of the face-mask were a lengthening of the REM-sleep latency (+ 38%; P less than 0.01), an increase in intra-sleep waking-time (+ 65%, P less than 0.05), an increase in stage I duration (+ 40%, P less than 0.02), and a decrease in REM-sleep duration (- 20%, P less than 0.01), resulting in a decrease in total sleep duration (- 9%, P less than 0.05). The sleep latency, the number of awakenings, the stage II duration, the deep slow-wave sleep duration, the sleep stability, and the number of sleep cycles were not significantly modified.
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D008397:Masks; D011930:Reaction Time / Q000502:physiology; D012119:Respiration; D012129:Respiratory Function Tests / Q000295:instrumentation / Q000379:methods*; D012737:Sex Factors; D012890:Sleep / Q000502:physiology*; D012894:Sleep Stages / Q000502:physiology
vernacular_title: Enregistrement de la ventilation au cours du sommeil par pneumotachographie: inconvénients et avantages.