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Table 2 Shows preliminary reference intervals (RI) for all investigated trombelastography (TEG) variables

From: Preliminary reference intervals and the impact of citrate storage time for thrombelastography in cats including delta and the velocity curve

Variable (unit) R (min) K (min) alpha (degree) MA (mm) G (dyn/cm2) CI (unitless) LY30 (%) SP (min) delta (min) TGa (mm/ min) MRTGa (mm/ min) TMRTGa (min) MRLa (mm/min) TMRLa (min)
Number of cats (n) 20 19 20 20 20 19 20 20 20 20 20 20 19 19
RI 2.7–18.1 b
0.8–3.9
27.6–75.2 18.5–62.5 1.2–8.2 b
−4.6 – 2.6
c 2.4–15.4 0.3–3.1 255.3–751.2 4.0–19.3 3.5–22.0 0.0–4.7 0.4–55.8
Minimum 2.8 1 26.1 18.2 1.1 −4.6 2.4 2.4 0.3 244.87 3.48 3.67 0.13 9.58
Maximum 18.7 3.6 74.9 61.4 8 2.5 15.8 15.8 2.9 735.09 19.28 22.5 4.37 56.08
Mean 7.6 2.3 57.6 46.3 4.6 −0.2 11.1 6.6 1.0 563.1 9.4 9.8 1.8 28.1
Median 6.6 2.3 58.1 47.3 4.5 0.1 6.6 5.8 0.9 588.5 8.5 8.8 1.8 22.4
SD 3.8 0.7 10.7 10.0 1.7 1.6 11.6 3.2 0.6 112.9 3.5 4.5 1.1 12.8
CV(%) 15.2 4.7 13.2 8.4 19.5 83.6 57.2 15.3 23.6 8.9 11.5 27.1 33.9 35.7
  1. Abbreviations: RI reference interval, min minutes, SD standard deviation, CV coefficient of variation, R reaction time, K clotting time, MA maximum amplitude, G clot rigidity, CI coagulation index, LY30 clot lysis at 30 min, SP split point, TG total thrombin generation, MRTG maximum rate of thrombus generation, TMRTG time to maximum rate of thrombus generation, MRL maximum rate of lysis, TMRL time to maximum rate of lysis
  2. aVelocity curve variables (TG, MRTG, TMRTG, MRL, TMRL) were obtained as MA version
  3. bReference intervals are not considered valid according to the ASVCP (American Society of Veterinary Clinical Pathology) guidelines as number of animals <20
  4. cA valid reference interval could not be calculated with any statistical method