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Related Experiment Videos

Postoperative cognitive dysfunction after noncardiac surgery: a systematic review.

Stanton Newman1, Jan Stygall, Shashivadan Hirani

  • 1Centre for Behavioural and Social Sciences in Medicine, University College London, United Kingdom. s.newman@ucl.ac.uk

Anesthesiology
|February 28, 2007
PubMed
Summary

Postoperative cognitive dysfunction (POCD) is common in the weeks after noncardiac surgery, especially in older adults. Evidence for long-term POCD is limited, and study methods vary significantly.

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Area of Science:

  • Anesthesiology
  • Geriatric Medicine
  • Neuroscience

Background:

  • Postoperative cognitive dysfunction (POCD) is a concern following surgical procedures.
  • Noncardiac surgery represents a significant portion of surgical interventions.
  • Understanding the incidence and risk factors for POCD is crucial for patient outcomes.

Purpose of the Study:

  • To systematically review existing research on POCD after noncardiac surgery.
  • To evaluate the current evidence base for POCD.
  • To examine the methodological quality of studies investigating POCD.

Main Methods:

  • Systematic literature review of studies on POCD in noncardiac surgery.
  • Analysis of study methodologies, including sample size, surgical types, and neuropsychological testing.

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  • Assessment of evidence for early and late POCD.

    • Main Results:

    • A significant proportion of patients exhibit POCD in the early weeks after major noncardiac surgery.
    • Elderly patients are identified as a higher-risk group for POCD.
    • Evidence for persistent POCD beyond 6 months is minimal.
    • No significant differences in POCD rates were found between regional and general anesthesia.
    • Numerous studies were underpowered and exhibited methodological limitations, including varied surgical procedures, inconsistent neuropsychological test batteries, and diverse POCD definitions.

    Conclusions:

    • POCD is a prevalent issue in the early postoperative period following noncardiac surgery, particularly in the elderly.
    • Current evidence for long-term POCD is limited, necessitating further research.
    • Methodological inconsistencies across studies hinder definitive conclusions and highlight the need for standardized research practices in POCD investigations.