A Simple Study of Awareness and Dreaming During Anaesthesia

Abstract

An investigation is described into the problems of recall and dreaming under light anaesthesia with nitrous oxide, muscle relaxation being provided by tubocurarine, and the anaesthetic technique being, as far as possible, standardized. Tape-recorded music of two types was used to test the patient's ability to hear and, in addition, the nature and quality of dreams was investigated. There was no evidence that patients were able to hear the tape-recordings and there was no evidence of "awareness" during the operative procedure. Dreaming occurred in 44 per cent of the patients and details of the dreams were recalled in some two-thirds of these. Hypocapnia did not protect against dreaming. Patients who showed marked movement during the operative procedure were more liable to dream than those who did not; the significance of this movement is discussed. In this (unpremedicated) group of patients nearly half described waiting for surgery as the most unpleasant feature of their surgical experience, and postoperative pain was the major complaint in a further 20 per cent. The third commonest of the major complaints was related to requests to lift the head, etc., when unable to do so in the time immediately after operation, and this finding would seem to have some minor practical significance. Unpleasant dreams were the fourth commonest major complaint.

A randomized controlled trial of light versus deep propofol sedation for elective outpatient colonoscopy: recall, procedural conditions, and recovery

“…7,8 The questionnaire was administered in the PACU once the patient had returned to full alertness (i.e., a score of 5 on the Modified Observer's Assessment of Alertness/Sedation [MOAA/S]) 9 following sedation. Patient satisfaction with sedation was scored on a fivepoint Likert scale (1 = very dissatisfied; 5 = very satisfied).…”

Comparison of Spectral Entropy and Bispectral Index Electroencephalography in Coronary Artery Bypass Graft Surgery

“…The EEG parameters were documented in duplicate using online and offline data acquisition. Eighteen hours after extubation and on the third day after surgery, a structured Brice questionnaire [10] was administered to the patient, and 18 h after tracheal extubation the word-stem completion test was repeated with only one investigator.…”

The Clinical Effectiveness of the Bispectral Index (BIS) To Reduce the Risk of Awareness for Elective Surgical Patients Undergoing General Anesthesia: A Prospective, Randomized, Double-Blind, Controlled Trial

“…Interview questions for postoperative assessment of awareness were chosen from questionnaires in previous studies of awareness (Appendix 1) [14][15][16].…”

“…Interview methods for detecting experiences of awareness have been developed, first by Brice, et al [8] and later modified by Liu, et al [9]. The modified Brice interview has been widely adopted and is now used in most studies for detecting awareness.…”