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Difference in Central and Peripheral Total Tryptase Concentration/Level in Fatal Anaphylaxis: A Case Report.

Jack Garland, Benjamin Ondruschka1, Ugo Da Broi2

  • 1Institute of Legal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.

The American Journal of Forensic Medicine and Pathology
|April 16, 2025
PubMed
Summary

Postmortem tryptase levels differ between central and peripheral blood in fatal anaphylaxis. This finding is crucial for accurately diagnosing anaphylactic deaths using tryptase testing.

Keywords:
anaphylaxisautopsyforensic pathologypostmortemsamplingtryptase

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Area of Science:

  • Forensic Pathology
  • Toxicology
  • Immunology

Background:

  • Postmortem tryptase is a key biomarker for diagnosing fatal anaphylaxis.
  • Previous studies indicate variations in postmortem tryptase levels between central and peripheral blood in the general population.
  • The variation of these levels in fatal anaphylaxis cases remains under-investigated.

Purpose of the Study:

  • To investigate whether postmortem total tryptase concentrations vary between central and peripheral blood samples in a fatal anaphylaxis case.
  • To provide evidence for or against significant differences in tryptase levels based on blood sample origin in anaphylactic deaths.

Main Methods:

  • A case of radiocontrast-induced anaphylaxis resulting in death was analyzed.
  • Postmortem total tryptase concentrations were measured in central blood samples (aorta, inferior vena cava).
  • Postmortem total tryptase concentrations were measured in peripheral blood samples (femoral artery, femoral vein).

Main Results:

  • Central blood samples (arterial and venous) showed postmortem total tryptase levels greater than 200 μg/L.
  • Peripheral blood samples (arterial and venous) showed postmortem total tryptase levels around 110 μg/L.
  • A significant difference in postmortem total tryptase concentrations was observed between central and peripheral blood samples.

Conclusions:

  • This case report demonstrates that postmortem total tryptase concentrations vary between central and peripheral blood samples in fatal anaphylaxis.
  • The findings suggest that the site of blood collection is a critical factor in interpreting postmortem tryptase levels for diagnosing anaphylaxis.
  • Further research is warranted to establish standardized guidelines for sample collection and interpretation in postmortem tryptase analysis.