Table 3.

The International Society on Thrombosis and Haemostasis (ISTH) scoring system. A ISTH score of 5 or more points suggests DIC is probable.

✓ thrombocytopenia: o 1 point for platelet count 50,000 to 100,000/microL o 2 points for platelet count r < 50,000/microL ✓ prolonged PT: o 1 point for 3 to 6 s of prolongation o 2 points for more than 6 s of prolongation ✓ low fibrinogen: 1 point for <100 mg/dL ✓ increased D-dimer: o 2 points for moderate increase o 3 points for “strong” increase