TABLE 2

Diagnostic Criteria for VKDB

Criteria
PT ≥4 times the control value
At least 1 of the following:
 Platelet count normal or raised
 Normal fibrinogen with absent fibrin degradation products
 PT returns to normal after vitamin K administration
 Concentration of PIVKA proteins exceeds normal controls
  • PIVKA, proteins induced by vitamin k antagonists; PT, prothrombin time.