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Related Experiment Videos

Early prognosis in anoxic coma. Reliability and rationale.

D A Shewmon1, C M De Giorgio

  • 1UCLA School of Medicine.

Neurologic Clinics
|November 1, 1989
PubMed
Summary

Predicting coma patient outcomes early is unreliable due to methodological issues. It is prudent to continue life support for all patients during the initial weeks or months of coma, regardless of early indicators.

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Area of Science:

  • Neurology
  • Critical Care Medicine
  • Medical Ethics

Background:

  • Accurate prediction of patient outcomes in coma is challenging.
  • Existing prognostic criteria are limited by methodological issues.
  • Early prognostication in coma is crucial for clinical decision-making.

Purpose of the Study:

  • To evaluate the reliability of early coma prognosis.
  • To determine the ethical implications of early prognostic criteria.
  • To provide recommendations for life support decisions in coma patients.

Main Methods:

  • Analysis of methodological challenges in coma prognosis studies.
  • Statistical evaluation of the probability of false predictions.
  • Review of ethical considerations in life support withdrawal.

Main Results:

  • Early coma prognostic criteria are inherently unreliable.
  • Methodological issues include self-fulfilling prophecies and data lumping.
  • Even ideal criteria have a significant probability of false predictions.

Conclusions:

  • Continue life support for all coma patients for several weeks or months.
  • Early prognostication has limited utility for individual patient outcomes.
  • Early predictions can inform family counseling, triage, and research.

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