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Unintentional pediatric superwarfarin exposures: do we really need a prothrombin time?

M E Mullins1, C L Brands, M R Daya

  • 1Oregon Poison Center, Department of Emergency Medicine, Oregon Health Sciences Center, Portland, Oregon, USA. mullinsm@msnotes.wustl.edu

Pediatrics
|February 2, 2000
PubMed

Insights

Routine follow-up coagulation tests are not necessary for children with accidental superwarfarin rodenticide exposure. These children, including those exposed to superwarfarin compounds, did not experience bleeding or require vitamin K treatment.

Area of Science:

  • Pediatric Toxicology
  • Emergency Medicine
  • Pharmacovigilance

Background:

  • Superwarfarin rodenticides are common household products.
  • Accidental pediatric exposures necessitate understanding of potential toxic effects.
  • Coagulation monitoring is standard for anticoagulant exposure.

Purpose of the Study:

  • To evaluate the necessity of routine follow-up coagulation studies in children with accidental superwarfarin rodenticide exposure.
  • To determine if medical intervention is required following such exposures.

Main Methods:

  • Retrospective chart review of pediatric superwarfarin exposures.
  • Data collected from a regional poison control center over two 2-year periods.
  • Outcome measures included prothrombin times (PT), international normalized ratios (INR), and clinical signs of bleeding.

Main Results:

  • No significant coagulation abnormalities were detected in 542 children studied.
  • None of the children developed bleeding complications.
  • No child required vitamin K antidotal treatment.

Conclusions:

  • Routine follow-up laboratory studies are not indicated for children with unintentional acute superwarfarin rodenticide exposure.
  • Medical intervention, including vitamin K, is generally not required.
  • This finding supports a less interventionist approach for minor exposures.
Abstract

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