Fig. 1From: Fibrin monomer complex on postoperative day 1 is correlated with the volume of deep vein thrombosis after knee surgeryMethod for estimation of thrombus volume. Thrombus volume was calculated by approximation of the value determined by ultrasonography to an elliptic cylinder [18]. a: Major Axis, b: Minor axis, h: Length. Estimated Thrombus Volume (cm3) = a/2 × b/2 × πhBack to article page