Related Experiment Video
Updated: May 23, 2026

Drug-Induced Sleep Endoscopy (DISE) with Target Controlled Infusion (TCI) and Bispectral Analysis in Obstructive Sleep Apnea
Published on: December 6, 2016
Ambient temperature and obstructive sleep apnea: effects on sleep, sleep apnea, and morning alertness
Fredrik Valham1, Carin Sahlin, Hans Stenlund
1Department of Internal Medicine, Umeå University, Umeå, Sweden. Fredrik.Valham@Lung.Umu.Se
Study Objectives:
The aim of the study was to investigate the effect of ambient temperature on sleep, sleep apnea, and morning alertness in patients with obstructive sleep apnea.
Design:
Randomized controlled trial.
Setting:
In-hospital investigations.
Participants:
Forty patients with obstructive sleep apnea naïve to treatment, with an apnea-hypopnea index of 10-30.
Interventions:
Three different nights in room temperatures of 16°C, 20°C, and 24°C.
Measurements:
Overnight polysomnography and Karolinska Sleepiness Scale.
Results:
The obstructive apnea-hypopnea index was 30 ± 17 at 16°C room temperature, 28 ± 17 at 20°C, and 24 ± 18 at 24°C. The obstructive apnea-hypopnea index was higher at 16°C room temperature versus 24°C (P = 0.001) and at 20°C room temperature versus 24°C (P = 0.033). Total sleep time was a mean of 30 min longer (P = 0.009), mean sleep efficiency was higher (77 ± 11% versus 71 ± 13% respectively, P = 0.012), and the patients were significantly more alert according to the Karolinska Sleepiness Scale (P < 0.028) in the morning at 16°C room temperature versus 24°C. The amount of sleep in different sleep stages was not affected by room temperature.
Conclusions:
Untreated patients with obstructive sleep apnea sleep longer, have better sleep efficiency, and are more alert in the morning after a night's sleep at 16°C room temperature compared with 24°C, but obstructive sleep apnea is more severe at 16°C and 20°C compared with 24°C.
Clinical Trial Information:
This study is registered in ClinicalTrials.gov number NCT00544752.
More Related Videos
04:53Acupoint Application Combined with Ear Plaster Therapy for Treating Sleep Disorders with Acute Exacerbation of Chronic Obstructive Pulmonary Disease
Published on: October 18, 2024
06:39Through-the-Wall Blood Sampling Method to Minimize Sleep Disruption in Clinical Settings
Published on: June 13, 2025
Related Concept Videos
Sleep Apnea
The condition is more prevalent among...
Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...
Factors Affecting Body Temperature
Factors may include:
Insufficient Sleep and Sleep Deprivation
Sleep deprivation is a more severe form of sleep loss...
Sleep-Wake Cycles
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
Other Pulmonary Disorders