Modified HIT score for patient under VA-ECMO

The modified HIT ECMO SCORE has been developed by Renou et al. This bedside scoring system is based on the 4T score and adapted for patients under VA-ECMO. It is designed to help physician in differentiating patients with Heparin Induced Thrombocytopenia from those with other aetiologies of thrombocytopenia.

For more information see: "Modified 4T clinical score to screen for Heparin-induced thrombocytopenia in patients under VA-ECMO".

HIT ECMO Score

Chronic obliterative arteriopathy
  • Yes
  • No
    • History of cancer
  • Yes
  • No
    • Cardiogenic shock secondary to pulmonary embolism
  • Yes
  • No
    • Cardiogenic shock secondary to cardiac surgery
  • Yes
  • No
    • Multiple-Organ Failure
  • Yes
  • No
    • 4T Score Item “Thrombosis associated with thrombocytopenia”
  • 0 : None
  • 1 : Progressive or recurrent thrombosis; non-necrotizing skin lesions; suspected thrombosis (not proven)
  • 2 : New thrombosis or skin necrosis; acute systemic reaction post-IV heparin bolus
    • 4T Score Item “Timing of onset of thrombocytopenia””
  • 0 : Platelet count fall < 4 days without recent exposure
  • 1 : Consistent with days 5–10 fall, but not clear or onset after day 10 or fall ≤ 1 day (prior heparin exposure within 30–100 days)
  • 2 : Clear onset between days 5–10 or platelet fall ≤ 1 day (prior heparin exposure within 30 days)

    • Result :

    0/7 Items
    Disclaimer: This score should not be used alone to guide HIT diagnostic process, nor should replace clinical judgment.