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Related Experiment Videos

Carbon monoxide stability in stored postmortem blood samples.

G W Kunsman1, C L Presses, P Rodriguez

  • 1Forensic Toxicology Laboratory, Bexar County Medical Examiner's Office, San Antonio, Texas 78229, USA.

Journal of Analytical Toxicology
|October 24, 2000
PubMed
Summary
This summary is machine-generated.

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Carboxyhemoglobin levels in postmortem blood are stable for up to two years when refrigerated. This finding is crucial for accurate carbon monoxide (CO) poisoning investigations, ensuring reliable toxicology results over time.

Area of Science:

  • Forensic Toxicology
  • Clinical Chemistry
  • Postmortem Analysis

Background:

  • Carbon monoxide (CO) poisoning is a significant cause of mortality in the US.
  • Accurate carboxyhemoglobin (%COHb) measurement in postmortem blood is vital for toxicology.
  • Specimen integrity over extended storage periods is a concern for retrospective CO analysis.

Purpose of the Study:

  • To assess the stability of carboxyhemoglobin in postmortem blood samples.
  • To determine if storage conditions affect %COHb levels over time.
  • To provide insights into reliable postmortem CO testing protocols.

Main Methods:

  • Blood samples were collected in three types of vacutainer tubes (red, gray, purple).
  • Carboxyhemoglobin levels were measured initially and after two years of refrigerated storage (3°C).

Related Experiment Videos

  • Analyses were performed using IL 282 and 682 CO-Oximeters.

    • Main Results:

    • Carboxyhemoglobin demonstrated stability in stored postmortem blood specimens.
    • No significant degradation of %COHb was observed after two years of refrigeration.
    • Results were consistent across different tube types and with or without preservatives.

    Conclusions:

    • Postmortem blood specimens are suitable for carboxyhemoglobin analysis even after two years of refrigerated storage.
    • The stability of %COHb supports the reliability of retrospective toxicological investigations.
    • Standard collection and storage protocols ensure the integrity of carboxyhemoglobin measurements.