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Related Experiment Video

Updated: Jul 19, 2026

Investigating the Neural Mechanisms of Aware and Unaware Fear Memory with fMRI

Investigating the Neural Mechanisms of Aware and Unaware Fear Memory with fMRI

Published on: October 6, 2011

Awareness in retrieval medicine.

J Gibson¹, A Flabouris

¹NRMA Careflight, Westmead, Sydney, New South Wales, Australia.

Anaesthesia and Intensive Care

|October 26, 2006

Summary

Awareness during anesthesia is rare, especially in critical care transport. This case highlights risks like excessive neuromuscular blockers during medical retrievals, emphasizing prevention challenges.

Area of Science:

Anesthesiology
Critical Care Medicine
Emergency Medicine

Background:

Awareness during general anesthesia involves recalling events, with incidence around 0.2% when neuromuscular blockers are used.
Most data on anesthesia awareness comes from in-hospital settings.
Neuromuscular blockers are frequently used in critical care transport to facilitate procedures and patient management.

Observation:

A case of intra-retrieval awareness occurred in a critically ill patient during out-of-hospital medical transport.
This event happened despite the use of neuromuscular blockers, a common practice in retrieval medicine.
The patient experienced recall of events during the transport, indicating a failure in anesthetic depth or monitoring.

Findings:

Excessive administration of neuromuscular blockers is a significant risk factor for awareness during medical retrievals.

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The unique environment of out-of-hospital transport presents distinct challenges for preventing awareness.

Inadequate anesthetic depth or monitoring may contribute to awareness in critically ill patients undergoing retrieval.

Implications:

There is a need to re-evaluate anesthetic practices and monitoring standards for critical care retrieval.
Strategies to prevent awareness during medical transport, particularly concerning neuromuscular blocker use, require further investigation.
Improving patient safety during medical retrievals necessitates addressing the specific risks associated with out-of-hospital anesthesia.