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Respiration in NREM and REM sleep after upper airway surgery for obstructive sleep apnoea
Author(s) -
MARRONE ORESTE,
SALVAGGIO ADRIANA,
INSALACO GIUSEPPE,
BONSIGNORE MARIA ROSARIA,
CIMINO MARIA,
GALLINA SALVATORE,
SPECIALE RICCARDO
Publication year - 1995
Publication title -
journal of sleep research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 117
eISSN - 1365-2869
pISSN - 0962-1105
DOI - 10.1111/j.1365-2869.1995.tb00168.x
Subject(s) - non rapid eye movement sleep , anesthesia , polysomnography , sleep (system call) , sleep and breathing , medicine , respiration , airway , slow wave sleep , sleep stages , breathing , apnea , electroencephalography , psychiatry , computer science , anatomy , operating system
SUMMARY To verify whether upper airway surgery in obstructive sleep apnoea syndrome affects differently respiration in NREM and REM sleep, 22 patients were studied by polysomnography before and three months after surgical treatment. On the average, treatment improved respiration during both sleep states, but no significant interaction was found between sleep state and effect of surgical treatment. According to the response to treatment, three groups of patients were identified: the first group ( N = 6), with an improvement in apnoea‐hypopnoea index (AHI), percentage of sleep time spent in apnoea and hypopnoea (time in AH) and mean oxyhaemoglobin saturation (SaO 2 ) in both NREM and REM sleep; the second group ( N = 5), with an improvement in AHI only in NREM sleep, associated with improvement in mean SaO 2 in both sleep states; the third group ( N = 11), without any improvement in AHI and time in AH, either associated ( N = 5) or not ( N = 6) with an improvement in mean SaO 2 in both sleep states. An increase in the percentage of hypopnoeas out of the total AHI after treatment could partly account for the apparent discrepancy between AHI and mean SaO 2 behaviour in the subjects of the second group, but not in the patients of the third group who improved their mean SaO 2 . Mixed apnoeas occurred before surgery in six subjects; they remained numerous after surgery only in two subjects who did not show any SaO 2 improvement. In conclusion, the degree of improvement in respiration after upper airway surgery was similar in every patient in NREM and REM sleep.