Preoperative predictors of portal vein thrombosis after splenectomy with periesophagogastric devascularization

Table 1 Differences between patients with and without portal vein thrombosis

Group	Group with PVT (n = 33)	Group without PVT (n = 36)	Tort' value	P value
Preoperative maximum portal blood velocity (cm/s)	18.06 ± 5.97	29.79 ± 7.75	6.9978	< 0.05
The diameter of portal vein (mm)	15.39 ± 2.97	13.17 ± 2.31	3.4935	< 0.05
Hepatic congestion index (cm/s-1)	0.2126 ± 0.1243	0.0942 ± 0.0702	4.812	< 0.05
The ratio of velocity and diameter (/s)	12.1774 ± 4.7493	23.3167 ± 6.7956	7.9439	< 0.05
The net weight of spleen (g)	619.4 ± 132.6	636.4 ± 235.3	0.3736	> 0.05
Preoperative PLT count (× 109/L)	31.5 ± 14.3	34.8 ± 17.2	0.8622	> 0.05
Postoperative PLT count (× 109/L)	237.8 ± 84.4	267.7 ± 137.6	1.0978	> 0.05
Preoperative PT value (s)	15.6 ± 1.4	15.9 ± 1.3	0.923	> 0.05
Postoperative PT value (s)	16.0 ± 1.8	16.4 ± 1.6	0.9772	> 0.05
Child-Pugh score	7.54 ± 1.24	7.63 ± 1.22	0.3037	> 0.05

PVT: Portal vein thrombosis; PLT: Platelet; PT: Prothrombin time.

Table 2 Analysis of respective variables

Variable(s)	Area under the curve	Cut-off value	Sensitivity (%)	Specificity (%)	Cases above the value	Cases with PVT	Cases under the value	Cases with PVT	χ2value	P value
Vmax	0.865	24.45 cm/s	87.9	75	31	4	38	29	27.51	< 0.05
Vmax/D	0.893	19.4333/s	93.9	77.8	30	2	39	31	36.04	< 0.05
CI	0.884	0.1138 cm/s-1	87.9	86.1	34	29	35	4	37.71	< 0.05
D	0.742	13.5 mm	81.8	63.9	40	27	29	6	14.76	< 0.05

PVT: Portal vein thrombosis; CI: Congestion index; V_max: The mean maximum portal blood flow velocity; D: Portal vein diameter.