Table 2.

Measurement data in the portal vein and the left gastric vein

	Flow direction (Forward/bidirectional/reverse)	Diameter (mm)	Velocity (cm/s)	Flow volume (mL/min)
Portal vein (n = 229)	209 (91.3%)/15 (6.5%)/5 (2.2%)	10.9 ± 2.0 (2.7–16.3)	12.4 ± 2.9b (6.3–22.5)	741.5 ± 277.8b (255–1970)
Left gastric vein (n = 164)a	12 (7.3%)/15 (9.1%)/137 (83.6%)	5.4 ± 1.7 (0.9–11.6)	12.4 ± 3.5c (5.2–25.8)	220.8 ± 174.5c35–1124

Data are expressed as number or mean ± SD (percentage or range).

^a Left gastric vein was not detected in 65 patients

^b Velocity and flow volume in the portal vein showing forward flow direction

^c Velocity and flow volume in the left gastric vein showing reverse flow direction