Related Experiment Videos
General anaesthesia for surgery can influence circulating melatonin during daylight hours
A Reber1, P R Huber, W Ummenhofer
1Department of Anaesthesia, University of Basel/Kantonsspital.
Acta Anaesthesiologica Scandinavica
|November 11, 1998
Summary
General anesthesia affects melatonin levels, with isoflurane anesthesia leading to higher circulating melatonin during recovery compared to propofol. This may explain prolonged sedation after isoflurane anesthesia.
Area of Science:
- Anesthesiology
- Endocrinology
- Sleep Medicine
Background:
- Melatonin and anesthetics influence sleep and behavior.
- General anesthesia's effect on circulatory melatonin is not well-documented.
- Hormonal changes during anesthesia are known.
Purpose of the Study:
- Investigate the impact of general anesthesia and surgery on melatonin, prolactin, and cortisol.
- Compare hormone profiles and responses during anesthesia and recovery.
- Explore the association between melatonin levels and anesthesia recovery.
Main Methods:
- 32 female patients undergoing gynecological surgery were studied.
- Two anesthesia groups: thiopentone/fentanyl/isoflurane vs. propofol/fentanyl.
- Blood samples collected pre- and post-medication, during anesthesia, and for 8 hours post-recovery.
Main Results:
- Both isoflurane and propofol anesthesia, along with darkness, elevated plasma melatonin.
- Elevated melatonin persisted longer in the isoflurane group during recovery.
- Prolactin and cortisol also increased during anesthesia and decreased during recovery.
Conclusions:
- Higher melatonin levels post-isoflurane anesthesia may contribute to increased sedation.
- The relationship between melatonin and anesthesia recovery is complex.
- Further research is needed to fully understand these hormonal dynamics.