Chest
Clinical InvestigationsSLEEP AND BREATHINGAssociation of Body Position With Severity of Apneic Events in Patients With Severe Nonpositional Obstructive Sleep Apnea
Section snippets
Patients
The polysomnograms of NPP with severe OSA who underwent acomplete polysomnography (PSG) evaluation in our sleep disorders unitwere reviewed. To find 30 polysomnograms without major artifacts andwith ≥ 30 apnea episodes in the lateral position and 30 apneaepisodes in the supine position during sleep stage 2, we had to reviewPSG records of 92 consecutive OSA NPP diagnosed in our sleep disordersunit. The 30 apneic events in each position included samples of 10consecutive apneic events in the
Results
Table 1summarizes the comparison of severity variables for apneic eventsoccurring in the supine posture vs apneic events occurring in thelateral posture. For each of the variables evaluated (unadjusted andadjusted for ApDur), apneic events occurring in the supine posture werefound to be significantly more severe than apneic events occurring inthe lateral posture during sleep stage 2.
Table 2showed the Pearson correlation coefficients between ApDur and the othermeasures of apnea severity. ApDur
Discussion
The results of this study demonstrate that in patients with severeOSA, who have a large number of apneic events in both the supine andthe lateral posture, the apneic events occurring in the supine postureare more severe than the apneic events occurring in the lateralposture. The difference in the degree of severity between apneic eventsin both postures was consistent for all apnea variables analyzed. Thesedata of 30 NPP with severe OSA relate to apneic events occurring duringsleep stage 2
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Cited by (0)
This work was performed at the Sleep Disorders Unit, LoewensteinHospital—Rehabilitation Center, Raanana, Israel.