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Table 2 Parameters of VWF function in ECMO patients

From: The effect of recombinant versus plasma-derived von Willebrand factor on prolonged PFA closure times in ECMO patients with acquired von Willebrand syndrome – an observational study

Parameter

Value

Normal values

VWF Antigen (IU/dl, IQR)

432 (327 - 728)

60 - 150

VWF Activity (IU/dl, IQR)

247.0 (182.0 - 382.5)

47.8 - 173.2

VWF Activity/Antigen (IQR)

0.51 (0.44 – 0.64)

0.73 - 1.16

VWF CBA (IU/dl, IQR)

120 (57 - 225)

60 - 150

VWF CBA/Antigen ratio (IQR)

0.24 (0.18 – 0.42)

0.8 – 1.5

HMW VWF multimers, n (%)

Reduced: 3 (23) Absent: 10 (77)

(normal)

  1. Data are presented as median (interquartile range, Q1-Q3) or number of patients (%). Denominator of the percentage is the total number of subjects in the group (n=13). CBA Collagen binding activity, HMW High molecular weight