Skip to main content

Table 1 4Ts Score for Heparin-Induced Thrombocytopenia

From: SARS-CoV-2 and pulmonary embolism: who stole the platelets?

4Ts pretest probability

Score

4

Thrombocytopenia

Platelet count fall > 50% and platelet nadir > 20

2

Timing of platelet count fall

Onset after day 10 of heparin exposure

1

Thrombosis or other sequelae

No new thrombosis

0

Other causes for thrombocytopenia

Possible other causes

1