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[A fatal hemorrhagic condition after rodenticide ingestion]

P Dulícek1, L Chrobák, K Podzimek

  • 1Oddĕlení klinické hematologie FN Hradec Králové.

Vnitrni Lekarstvi
|January 1, 1994
PubMed

Insights

Superwarfarin poisoning can cause fatal bleeding, even with vitamin K1 treatment. This case highlights the diagnostic challenges of superwarfarin intoxication due to fluctuating coagulation test results.

Area of Science:

  • Toxicology
  • Hematology
  • Internal Medicine

Background:

  • Superwarfarins are potent anticoagulants that can cause severe hemorrhagic complications.
  • Vitamin K1 is the standard antidote, but its efficacy can be limited in superwarfarin poisoning.

Observation:

  • A 53-year-old man presented with a fatal hemorrhagic condition after presumed superwarfarin ingestion.
  • Clinical symptoms included sudden onset of hemorrhagic diathesis.
  • Laboratory tests revealed marked prolongation of the international normalized ratio (INR) and activated partial thromboplastin time (APTT) with persistent pathological values despite vitamin K1 administration.

Findings:

  • The INR and APTT values showed striking fluctuations during repeated examinations.
  • Diagnosis of superwarfarin intoxication was challenging due to the difficulty in assessing the ratio of vitamin K1 and its epoxide form.
  • Standard vitamin K1 substitution doses were insufficient to correct the prolonged coagulation times.

Implications:

  • This case underscores the importance of considering superwarfarin intoxication in patients with unexplained severe bleeding and abnormal coagulation parameters.
  • Diagnostic challenges necessitate a high index of suspicion, even in the absence of direct evidence.
  • Further research into optimal management strategies and diagnostic markers for superwarfarin poisoning is warranted.

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