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A consideration of ketamine dreams
Canadian Anaesthetists' Society Journal
|January 1, 1975
Summary
Covering patients' eyes during ketamine anesthesia may reduce dreams, especially for those who normally dream at home. Preoperative screening for dream tendency is recommended to minimize unpleasant experiences.
Area of Science:
- Anesthesiology
- Psychology
Background:
- Ketamine is used for anesthesia, and dreams are a known side effect.
- Patient-reported dream incidence and characteristics are important outcomes in anesthesia research.
Purpose of the Study:
- To investigate the effect of eye covering on dream incidence during and after ketamine anesthesia.
- To identify patient factors influencing dream occurrence after ketamine.
Main Methods:
- 150 patients undergoing therapeutic abortion with ketamine anesthesia were randomly assigned to three groups: eyes covered in OR only, eyes covered in OR and recovery, or control (eyes uncovered).
- Postoperative questioning assessed dreams, nausea, vomiting, headache, dizziness, and home dreaming frequency.
Main Results:
- Eye covering had a marginal effect on dream incidence overall.
- Patients who normally dreamed at home were significantly more likely to dream after ketamine anesthesia.
- Eye covering reduced dream incidence in home-dreamers from 86% to 64% across the intervention groups.
Conclusions:
- The tendency to dream at home is a key predictor of dreaming after ketamine anesthesia.
- Eye covering, particularly in the recovery room, may help reduce dreams in susceptible individuals (home-dreamers).
- Preoperative assessment of dreaming habits and environmental modifications (quiet, dark recovery) could further mitigate unpleasant dreams.