Dream Reports After Endoscopy Were Not Equivalent to Verified Intraoperative Awareness

Remembering a dream and remembering the procedure are different endpoints.

What the study found

A randomized comparison of propofol, ciprofol and remimazolam assessed dreaming after gastrointestinal endoscopy. Dream frequency did not differ clearly across groups, while some hemodynamic and later sleep measures followed different patterns.

A negative comparison did not prove equivalence

Reported dream frequencies were roughly 33%, 48% and 42% across the three groups, without a statistically significant overall difference. Those percentages concern reported dreaming after heterogeneous endoscopy procedures. An equivalence claim would require an appropriate design and margin. The questionnaire result also cannot determine whether a particular remembered image arose during the procedure, emergence or a later interval.

Limits of interpretation

Dream reports depend on recall and interview timing. An absence of a reported dream does not establish unconsciousness throughout, and a dream does not independently establish awareness of surgical events. Multiple procedures and secondary comparisons also complicate interpretation.

Implications for case review

Separate subjective dream content from corroborated procedural recall. Do not infer a patient’s exact awareness state from a group dream percentage or a sedative’s amnestic properties. Actual reports, contemporaneous responsiveness and the administration record remain necessary.

Source and related reading

Source: PMC11144431, supplied full-text paper. Findings are paraphrased; forensic implications are an interpretation.

Related: Diazepam Was Part of Treatment After Antipsychotic-Associated Movement Symptoms During Alcohol Withdrawal.