Comparison of native and citrated whole blood samples for rapid thromboelastography in Beagles

Hyebin Wang, Aryung Nam, Kunho Song, Hwa Young Youn, Kyoung Won Seo

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Objective: To examine the extent to which rapid thromboelastography (r-TEG) could decrease the testing time in comparison with that required for kaolin-activated thromboelastography (TEG), and to compare 2 types of blood samples (ie, native and citrated whole blood [WB]), for determining r-TEG values in healthy dogs. Design: Prospective observational study. Setting: University teaching hospital. Animals: Sixteen healthy Beagles. Interventions: Kaolin-activated TEG test using citrated WB samples and r-TEG test using native and citrated WB samples were performed in 16 dogs. At 60 minutes after the initial blood sampling, further samples were collected from a subset of 6 dogs in the same manner to evaluate intraindividual repeatability of r-TEG. Measurements and Main Results: The mean time to maximum amplitude (MA) for r-TEG with native and citrated WB samples was recorded as 1313.9 ± 250.9 seconds and 1351.3 ± 264.6 seconds (mean ± SD), respectively, and 1779.9 ± 197.0 seconds for kaolin-activated TEG. Coefficients of variation with native and citrated WB samples for r-TEG values, TEG-activated clotting time, clot formation time, α angle, and MA, were determined to be 13.4% versus 18.8%, 11.1% versus 16.6%, 4.2% versus 5.1%, and 10.0% versus 10.0%, respectively. Intraindividual variations were lower for native WB samples than for citrated WB samples. Conclusions: The r-TEG test significantly decreased the mean time to MA compared with the kaolin-activated TEG test. In addition, native WB samples showed lower coefficients of variation and intraindividual variation than citrated WB samples in r-TEG analysis; this suggests that native WB samples can provide more consistent results. Therefore, the r-TEG method using native WB samples is recommended for assessment of dogs’ hemostatic status when an early diagnosis is required.

Original languageEnglish (US)
Pages (from-to)54-59
Number of pages6
JournalJournal of Veterinary Emergency and Critical Care
Issue number1
StatePublished - Jan 1 2020
Externally publishedYes


  • activated clotting time
  • blood sampling
  • dog
  • kaolin-activated TEG
  • rapid TEG

ASJC Scopus subject areas

  • veterinary(all)


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