A randomized controlled trial of fresh frozen plasma for treating venom-induced consumption coagulopathy in cases of Australian snakebite (ASP-18)

G. K. Isbister, N. A. Buckley, Colin B. Page, Fiona E Scorgie, L. F. Lincz, Michael Seldon, S. G A Brown

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33 Citations (Scopus)

Abstract

Background: Venom-induced consumption coagulopathy (VICC) is a major effect of snake envenoming. Objectives: To investigate whether fresh frozen plasma (FFP) given after antivenom resulted in more rapid correction of coagulation. Patients/Methods: This was a multicenter open-label randomized controlled trial in patients with VICC of FFP vs. no FFP within 4 h of antivenom administration. Patients (> 2 years) recruited to the Australian snakebite project with VICC (International Normalized Ratio [INR] > 3) were eligible. Patients were randomized 2 : 1 to receive FFP or no FFP. The primary outcome was the proportion with an INR of < 2 at 6 h after antivenom administration. Secondary outcomes included time from antivenom administration to discharge, adverse effects, major hemorrhage, and death. Results: Of 70 eligible patients, 65 consented to be randomized: 41 to FFP, and 24 to no FFP. Six hours after antivenom administration, more patients randomized to FFP had an INR of < 2 (30/41 [73%] vs. 6/24 [25%]; absolute difference, 48%; 95% confidence interval 23-73%; P = 0.0002). The median time from antivenom administration to discharge was similar (34 h, range 14-230 h vs. 39 h, range 14-321 h; P = 0.44). Seven patients developed systemic hypersensitivity reactions after antivenom administration - two mild and one severe (FFP arm), and three mild and one severe (no FFP). One serious adverse event (intracranial hemorrhage and death) occurred in an FFP patient with pre-existing hypertension, who was hypertensive on admission, and developed a headache 6 h after FFP administration. Post hoc analysis showed that the median time from bite to FFP administration was significantly shorter for non-responders to FFP than for responders (4.7 h, interquartile range [IQR] 4.2-6.7 h vs. 7.3 h, IQR 6.1-8 h; P = 0.002). Conclusions: FFP administration after antivenom administration results in more rapid restoration of clotting function in most patients, but no decrease in discharge time. Early FFP administration (< 6-8 h) post-bite is less likely to be effective.

Original languageEnglish
Pages (from-to)1310-1318
Number of pages9
JournalJournal of Thrombosis and Haemostasis
Volume11
Issue number7
DOIs
Publication statusPublished - Jul 2013
Externally publishedYes

Keywords

  • Antivenom
  • Consumption coagulopathy
  • Envenomation
  • Plasma
  • Snakebites

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