|
KMID : 1002120050020010047
|
|
Journal of Korean Sleep Research Society
2005 Volume.2 No. 1 p.47 ~ p.50
|
|
|
Effects of light therapy on patients with delayed sleep phase syndrome
|
|
Yun Dong-Joo
Joo Eun-Yeon
Han Sun-Jung
Choi Su-Jung
Hong Seung-Bong
|
|
|
Abstract
|
|
|
Background: Light therapy (LT) is a potent tool for the treatment of circadian rhythm sleep disorder. We present the method and treatment effect of LT in patients with delayed sleep phase syndrome (DSPS).
Methods: We enrolled 11 patients (M:F=4:7). Eleven of them had DSPS. Two of them who had post-encephalitic epilepsy were dropped out because they showed photosensitive seizures to LT. Thus the remaining 9 patients received LT with a bright light box for consecutive 7-10 days. The patients sit in front of a “light box”, which emits 10,000 lux of full spectrum fluorescent light for the periods of 30-45 minutes daily in the morning right after wake-up. Light was restricted by reducing room light for 1hour before light-off at bedtime. The timing of LT was readjusted everyday to the scheduled wake-up time of each day.
Results: By the LT, the average bedtime was advanced from 02:30 a.m. (range; 01:30-5:50 a.m.) to 23:15 p.m. (range; 22:00-23:50 p.m.) and the average wake-up time from 11:30 a.m. (range; 9:20 a.m.-2:30 p.m.) to 7:50 a.m. (range; 7:20-8:30 a.m.). All patients have maintained the readjusted bedtime and wake-up time schedules for 3.8±2.4 months without additional light therapy. No adverse events of LT were observed.
Conclusion: A short-term LT was able to advance a delayed sleep phase and the advancement of sleep phase has been maintained for more than 3 months.
|
|
|
KEYWORD
|
|
|
Light therapy, Delayed sleep phase syndrome, Circadian rhythm sleep disorder
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
 
|