ABSTRACT
This study aimed to evaluate the effectiveness of elevated posture in the management
of obstructive sleep apnea (OSA). Fourteen subjects presenting with mild-moderate
OSA, (apnea-hypopnea index [AHI] 10 to 60/h), were included in a randomized crossover
investigation. A shoulder-head elevation pillow (SHEP) was compared with nasal continuous
positive airway pressure (nCPAP) therapy. Treatment success was defined as AHI ≤ 10/h
and partial success as AHI > 10 < 16/h. Four subjects achieved treatment success with
the SHEP and three achieved partial success. The remaining seven subjects were treatment
failures. In contrast, success was achieved with nCPAP in 12 subjects. One subject
achieved partial success and one was a treatment failure. With the SHEP, the mean
AHI decreased from 27 ± 12/h to 21 ± 17/h. With nCPAP, the mean AHI was 5 ± 3/h; (p = 0.008 for the difference between treatments). Although somewhat variable, these
data provide evidence that elevated posture during sleep is helpful in the management
of OSA in some individuals. Results support the use of elevated posture as second-line
therapy in the management of OSA. However, no relationships could be identified between
baseline data, including the identification of positional OSA, and objective outcomes
that might predict patients who are likely to benefit from treatment in an elevated
position.
KEYWORDS
Obstructive sleep apnea - apnea-hypopnea index - elevation device - continuous positive
airway pressure - posture
REFERENCES
- 1
Haponik E F, Smith P L, Bohlman M E et al..
Computerized tomography in obstructive sleep apnea. Correlation of airway size with
physiology during sleep and wakefulness.
Am Rev Respir Dis.
1983;
127
221-226
- 2
Suratt P M, Dee P, Atkinson R L, Armstrong P, Wilhoit S C.
Fluoroscopic and computed tomographic features of the pharyngeal airway in obstructive
sleep apnea.
Am Rev Respir Dis.
1983;
127
487-492
- 3
Anch A M, Remmers J E, Bunce 3rd H D.
Supraglottic airway resistance in normal subjects and patients with occlusive sleep
apnea.
J Appl Physiol.
1982;
53
1158-1163
- 4
Remmers J E, deGroot W J, Sauerland E K, Anch A M.
Pathogenesis of upper airway occlusion during sleep.
J Appl Physiol.
1978;
44
931-938
- 5
Sforza E, Bacon W, Weiss T et al..
Upper airway collapsibility and cephalometric variables in patients with obstructive
sleep apnea.
Am J Respir Crit Care Med.
2000;
161
347-352
- 6
Brown I B, McClean P A, Boucher R, Zamel N, Hoffstein V.
Changes in pharyngeal cross-sectional area with posture and application of continuous
positive airway pressure in patients with obstructive sleep apnea.
Am Rev Respir Dis.
1987;
136
628-632
- 7
Yildirim N, Fitzpatrick M F, Whyte K F et al..
The effect of posture on upper airway dimensions in normal subjects and in patients
with the sleep apnea/hypopnea syndrome.
Am Rev Respir Dis.
1991;
144
845-847
- 8
Jan M A, Marshall I, Douglas N J.
Effect of posture on upper airway dimensions in normal human.
Am J Respir Crit Care Med.
1994;
149
145-148
- 9
Martin S E, Marshall I, Douglas N J.
The effect of posture on airway caliber with the sleep-apnea/hypopnea syndrome.
Am J Respir Crit Care Med.
1995;
152
721-724
- 10
Battagel J M, Johal A, Smith A M, Kotecha B.
Postural variation in oropharyngeal dimensions in subjects with sleep disordered breathing:
a cephalometric study.
Eur J Orthod.
2002;
24
263-276
- 11
Tsuiki S, Almeida F R, Bhalla P S, Lowe A A, Fleetham J A.
Supine-dependent changes in upper airway size in awake obstructive sleep apnea patients.
Sleep Breath.
2003;
7
43-50
- 12
McEvoy R D, Sharp D J, Thornton A T.
The effects of posture on obstructive sleep apnea.
Am Rev Respir Dis.
1986;
133
662-666
- 13
Neill A M, Angus S M, Sajkov D, McEvoy R D.
Effects of sleep posture on upper airway stability in patients with obstructive sleep
apnea.
Am J Respir Crit Care Med.
1997;
155
199-204
- 14
Kribbs N B, Pack A I, Kline L R et al..
Objective measurement of patterns of nasal CPAP use by patients with obstructive sleep
apnea.
Am Rev Respir Dis.
1993;
147
887-895
- 15
American Sleep Disorders Association .
Practice parameters for the use of portable recording in the assessment of obstructive
sleep apnea. Standards of Practice Committee of the American Sleep Disorders Association.
Sleep.
1994;
17
372-377
- 16
Dingli K, Coleman E L, Vennelle M et al..
Evaluation of a portable device for diagnosing the sleep apnoea/hypopnoea syndrome.
Eur Respir J.
2003;
21
253-259
- 17
American Academy of Sleep Medicine. .
Sleep-related breathing disorders in adults: recommendations for syndrome definition
and measurement techniques in clinical research. The Report of an American Academy
of Sleep Medicine Task Force.
Sleep.
1999;
22
667-668
- 18
Cartwright R D.
Effect of sleep position on sleep apnea severity.
Sleep.
1984;
7
110-114
- 19
Johns M W.
A new method for measuring daytime sleepiness: the Epworth sleepiness scale.
Sleep.
1991;
14
540-545
- 20
Weaver T E, Laizner A M, Evans L K et al..
An instrument to measure functional status outcomes for disorders of excessive sleepiness.
Sleep.
1997;
20
835-843
- 21
Ware Jr J E, Sherbourne C D.
The MOS 36-item short-form health survey (SF-36). I. Conceptual framework and item
selection.
Med Care.
1992;
30
473-483
- 22
Engleman H M, Kingshott R N, Wraith P K, Mackay T W, Deary I J, Douglas N J.
Randomized placebo-controlled crossover trial of continuous positive airway pressure
for mild sleep Apnea/Hypopnea syndrome.
Am J Respir Crit Care Med.
1999;
159
461-467
- 23
Skinner M A, Kingshott R N, Jones D R, Taylor D R.
Lack of efficacy for a cervicomandibular support collar in the management of obstructive
sleep apnea.
Chest.
2004;
125
118-126
- 24
Cheshire K, Engleman H, Deary I, Shapiro C, Douglas N J.
Factors impairing daytime performance in patients with sleep apnea/hypopnea syndrome.
Arch Intern Med.
1992;
152
538-541
- 25
Kingshott R N, Engleman H M, Deary I J, Douglas N J.
Does arousal frequency predict daytime function?.
Eur Respir J.
1998;
12
1264-1270
Margot A SkinnerPh.D.
School of Physiotherapy, University of Otago
P.O. Box 56, Dunedin, New Zealand
Email: margot.skinner@otago.ac.nz