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Related Experiment Videos

Bleeding time: is it a useful clinical tool?

S W O'Kelly1, E G Lawes, J B Luntley

  • 1Shackleton Department of Anaesthetics, Southampton General Hospital.

British Journal of Anaesthesia
|March 1, 1992
PubMed
Summary
This summary is machine-generated.

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Bleeding time tests show similar variability between subjects and observers, indicating unreliability. This hematoma risk assessment tool should not be used alone for regional anesthesia.

Area of Science:

  • Medical Science
  • Hematology
  • Anesthesiology

Background:

  • Assessing bleeding risk is crucial before regional anesthesia.
  • Hematoma formation is a potential complication of regional anesthetic techniques.
  • Standardized bleeding time measurements are often used to evaluate hemostatic function.

Purpose of the Study:

  • To evaluate the reliability of bleeding time measurements.
  • To determine if bleeding time is a dependable indicator of bleeding risk.
  • To assess the contribution of observer variability to measurement unreliability.

Main Methods:

  • Five volunteers underwent bleeding time assessments.
  • Twelve independent observers performed the bleeding time tests.
  • Statistical analysis compared variability between subjects and between observers.

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Main Results:

  • Variability in bleeding time measurements was observed between subjects.
  • Variability in bleeding time measurements was also found between observers.
  • The degree of variability was statistically similar for both subjects and observers.

Conclusions:

  • Bleeding time estimation demonstrates significant unreliability.
  • Observer variability contributes to the unreliability of bleeding time tests.
  • Bleeding time should not be used in isolation for assessing hematoma risk in regional anesthesia.