The influence of gender and upper airway resistance on the ventilatory response to arousal in obstructive sleep apnoea in humans

The Journal of Physiology
Amy S JordanD P White

Abstract

The termination of obstructive respiratory events is typically associated with arousal from sleep. The ventilatory response to arousal may be an important determinant of subsequent respiratory stability/instability and therefore may be involved in perpetuating obstructive respiratory events. In healthy subjects arousal is associated with brief hyperventilation followed by more prolonged hypoventilation on return to sleep. This study was designed to assess whether elevated sleeping upper airway resistance (R(UA)) alters the ventilatory response to arousal and subsequent breathing on return to sleep in patients with obstructive sleep apnoea (OSA). Inspired minute ventilation (V(I)), R(UA) and end-tidal CO(2) pressure (P(ET,CO(2))) were measured in 22 patients (11 men, 11 women) with OSA (mean +/-s.e.m., apnoea-hypopnoea index (AHI) 48.9 +/- 5.9 events h(-1)) during non-rapid eye movement (NREM) sleep with low R(UA) (2.8 +/- 0.3 cmH(2)O l(-1) s; optimal continuous positive airway pressure (CPAP) = 11.3 +/- 0.7 cmH(2)O) and with elevated R(UA) (17.6 +/- 2.8 cmH(2)O l(-1) s; sub-optimal CPAP = 8.4 +/- 0.8 cmH(2)O). A single observer, unaware of respiratory data, identified spontaneous and tone-induced arousals of 3-15 s duration pre...Continue Reading

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Citations

Nov 16, 2011·Pflügers Archiv : European journal of physiology·Richard S T LeungDaniel Stevens
Jun 1, 2011·Sleep & Breathing = Schlaf & Atmung·Gláucia CarneiroSônia Maria Togeiro
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