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Intradialytic subjective sleepiness and oral body temperature
K P Parker1, D L Bliwise, D B Rye
1Nell Hodgson Woodruff School of Nursing, Emory University, Atlanta, GA 30322, USA. kpark04@nurse.emory.edu
Sleep
|November 18, 2000
Summary
Hemodialysis patients experience increased sleepiness during treatment, linked to body temperature fluctuations. This effect on sleep propensity is independent of the dialysis treatment time.
Area of Science:
- Nephrology
- Sleep Medicine
- Physiology
Background:
- Hemodialysis (HD) patients frequently exhibit sleepiness during treatment sessions.
- A known inverse relationship exists between body temperature and sleep propensity.
Purpose of the Study:
- To describe the pattern of subjective sleepiness during hemodialysis.
- To examine the relationship between intradialytic sleepiness and oral body temperature.
- To determine if this relationship is influenced by the time of day of the dialysis treatment.
Main Methods:
- Sixty chronic HD patients across three daily treatment shifts were enrolled.
- Subjective sleepiness and oral body temperature were measured every 15 minutes throughout HD.
- Data were collected at two urban dialysis centers.
Main Results:
- Sleepiness levels were significantly higher in the morning shift (Shift 1) compared to later shifts.
- Intradialytic sleepiness increased during the first half of dialysis, then slightly decreased.
- Body temperature showed a quadratic trend, initially rising, then falling near peak sleepiness, before rising again.
- A significant negative correlation was found between sleepiness and body temperature (r=-.59, p<.03).
Conclusions:
- Sleep propensity increases during hemodialysis, potentially due to treatment-induced changes in arousal and thermoregulation.
- The observed relationship between sleepiness and temperature during HD is not dependent on the treatment's timing.