Table 1: Perioperative changes in standard laboratory-based tests for coagulation.
Units and reference values are indicated in parenthesis. Hct: hematocrit, PT: prothrombin time, INR: international normalized ratio, aPTT: activated partial thromboplastin time. Preop 2 day: 2day before operation; Postop 1 h: 1 h after operation.
Preop2 day Postop1 h
PT (s, 11.4–14.2) 12.3 18.5
PT INR (0.8–1.2) 0.92 1.57
aPTT (s, 29–45) 34.9 58.0
Fibrinogen (mg/dL, 170–350) 399 147
Platelet (×103/μL, 29–45) 236 94