Source: Annual Congress 2006 - Pathogenesis of obstructive sleep apnoea
Disease area: Sleep and breathing disorders

Abstract

The stability and the resistance of the upper airways depend on the sleep position in the patients with OSA. In a subgroup of patients the AHI is reduced during the episodes sleeping in the side position compared to the supine position. But there are no information about the effects of sleeping in a 30 º and 60 º sleep position.
The present study investigates the effects of the two different sleep position in a group of patients with a mild OSA (AHI less than 25/h).
Method: In 10 consecutive patients with the first-time diagnosis of mild OSAS a diagnostic PSG was performed. Some nights later an other PSG was done, during that night the patients slept with an elevated torso of a 30 º and 60 º sleep position. The position was changed in a randomized order.
Anthropometric data: n = 10, age: 49,9 (+/- 13,8) years, BMI: 26,4 (+/- 3,3) kg/m², SaO₂ : 81,0 (+/- 3,6) %, ESS: 9,0 (+/- 3,6).
Results:
The sleep efficancy was 84,3 % (±10,8 ) in the diagnostic night and 76,4 % (± 15,2) in the 30 º and 69,4 % in the 60 º position (p<0,05).
The AHI was 17,0 (±4,2) in the diagnostic night and 25,2 (±13,0) in the 30º and 22,9 (± 20,4) in the 60º position (p<0,05).
Snoring was detected during 23,1 (± 33,2) epoch In the diagnostic night and 12,5 (± 25,1) in the 30º and 2,8 in the 60º position (p<0,05).
Conclusion: The sleep quality is reduced under a 60 ºsleeping position compared to a flat position. Snoring is reduced significantly, but the AHI is not reduced under the 30º and the 60 º position. For that reason a 60 º position can not be recommended for patients with a mild OSA.

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Citations should be made in the following way:
G. Nilius, U. Domanski, K. J. Franke, K. H. Ruehle (Hagen, Germany). Effects of a 30º and 60º sleep position on sleep quality, snoring and apnoea/hypopnoea (AHI) index in patients with mild obstructive sleep apnoea (OSA). Eur Respir J 2006; 28: Suppl. 50, 3747

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