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Hematology
Calculate the 4T score for heparin-induced thrombocytopenia (HIT) pretest probability. Score ≤3: >99% NPV for HIT. Intermediate/High (≥4): stop heparin, start alternative anticoagulation.
Formula
Thrombocytopenia (0–2) + Timing (0–2) + Thrombosis (0–2) + Other causes (0–2). Total 0–8.
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Emergency
Calculate the Wells Score to assess the clinical probability of deep vein thrombosis (DVT). Guide diagnostic workup and D-dimer testing.
Formula
Wells DVT Score = sum of clinical criteria (range: −2 to 9)
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