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vWF: Ac / vWF: Ag ratio (Citrated plasma, frozen (cp))

Specimens: Citrated plasma, frozen (cp)
Preanalytics/Notes: Collect citrated blood, centrifuge directly after sampling and transfer citrated blood into a new tube, label this tube accordingly, freeze and dispatch deep-frozen. Instead of analysing the ristocetin cofactor activity, we determine the von Willebrand factor activity. Due to the use of recombinantly produced reagents, this testing has advantages over the formerly performed measurement of the ristocetin cofactor. For the diagnosis of von Willebrand's syndrome, vWF:Ac can be used analogous to vWF.RCo to measure the functional activity of the von Willebrand factor.
Method: Turbidimetry
Set-up: Mon Tue Wed Thu Fri Sat Sun
Duration: 3 days
Indication/Significance:
  • Diagnostic assessment of unclear bleeding tendency: tendency to nosebleed (epistaxis) and mucosal bleeding, e.g. bleeding after dental extraction or menorrhagias, are typical. Reference in the family anamnesis is important.

  • Common global tests such as Quick value, PTT or thrombin time are frequently normal.

  • Diagnostic assessment of haemophilia and thrombocytopathy

  • Therapy monitoring
Interpretation:
Further tests:

Multimeric analysis, molecular genetic analyses

initial letter


Abrechnung GOÄ

Die Kosten werden für den i. d. R. genutzten 1,15-fachen GOÄ-Satz dargestellt. Wird die Unter­suchung nicht in Ihrem regionalen Labor durch­geführt, erfolgt die Analyse in dem Labor, das im Leistungs­ver­zeich­nis genannt ist. In diesem Fall gilt der dort für die Untersuchung angegebene Preis.