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Related Experiment Videos

Wakeful response to command indicates memory potential during emergence from general anesthesia

R C Dutton1, W D Smith, N T Smith

  • 1Department of Anesthesia, Kaiser Permanente Medical Center, Hayward, CA 94545, USA.

Journal of Clinical Monitoring
|January 1, 1995
PubMed
Summary
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A brief wakeful response during anesthesia emergence suggests no memory formation. A sustained wakeful response indicates potential for memory, aiding anesthetic depth assessment.

Area of Science:

  • Anesthesiology
  • Neuroscience
  • Cognitive Psychology

Background:

  • Assessing anesthetic depth is crucial for patient safety.
  • Determining a patient's potential for memory formation during surgery is an important aspect of anesthetic monitoring.
  • A reliable clinical sign for memory potential could improve anesthetic management.

Purpose of the Study:

  • To identify a clinical sign indicating memory formation potential during emergence from anesthesia.
  • To evaluate the utility of a wakeful response as an endpoint for anesthetic depth monitors.
  • To assess the feasibility of using wakeful responses for titrating anesthetic agents.

Main Methods:

  • Patients' responses to commands (eye opening, hand squeezes, counting) were evaluated.

Related Experiment Videos

  • These wakeful responses were correlated with memory test results (recall, cued recall, multiple-choice).
  • Definitions for brief, intermediate, and sustained wakeful responses were established.

    • Main Results:

    • Patients demonstrating a sustained wakeful response (≥4 hand squeezes or counts) showed evidence of memory formation (46%).
    • Patients with brief or intermediate wakeful responses did not exhibit memory formation (0%).
    • A sustained wakeful response was necessary for memory formation in this study population.

    Conclusions:

    • A sustained wakeful response to command is a potential indicator of memory formation during anesthetic emergence.
    • A brief wakeful response suggests a low likelihood of memory formation.
    • This clinical sign could be valuable for monitoring anesthetic depth and guiding anesthetic administration.