Diagnostic value of dual-energy computed tomography in irreversible transmural intestinal necrosis in patients with acute occlusive mesenteric ischemia

Table 3 Comparison of computed tomography subjective parameters between irreversible transmural intestinal necrosis and non-irreversible transmural intestinal necrosis groups, n (%)

CT signs	Total	ITIN	Non-ITIN	χ2	P value
Vascular CT sign	62	29	33
SMA stenosis/occlusion involved range				3.267	0.195
≤ 20 mm	8 (12.9)	2 (6.9)	6 (18.2)
20-50 mm	16 (25.8)	6 (20.7)	10 (30.3)
≥ 50 mm	38 (61.3)	21 (72.4)	17 (51.5)
SMA narrow/blocked area				9.939	0.148
I	5 (8.1)	2 (6.9)	3 (9.1)
II	0 (0)	0 (0)	0 (0)
III	2 (3.2)	0 (0)	2 (6.1)
IV	8 (12.9)	1 (3.4)	7 (21.2)
I + II	1 (1.6)	0 (0)	1 (3.0)
III + IV	24 (38.7)	14 (48.3)	10 (30.3)
I + II + III	4 (6.5)	1 (3.4)	3 (9.1)
II + III + IV	11 (17.7)	6 (20.7)	5 (15.2)
I + II + III + IV	7 (11.3)	5 (17.2)	2 (6.1)
Intestinal wall CT sign	102	48	54
Intestinal wall thickening	62 (60.8)	32 (66.7)	30 (55.6)	1.949	0.163
Reduced or absent bowel wall enhancement	74 (72.5)	43 (89.6)	31 (57.4)	4.543	0.033
Intestinal wall enhancement	4 (3.9)	0 (0)	4 (7.4)		0.122
High density of the intestinal wall	8 (7.8)	4 (8.3)	4 (7.4)	< 0.001	1
Bowel dilation	47 (46.1)	34 (70.8)	13 (24.1)	24.095	< 0.001
Parenteral CT sign
Swelling and exudation in the mesentery	61 (59.8)	30 (62.5)	31 (57.4)	0.588	0.443
Seroperitoneum	47 (46.1)	24 (50.0)	23 (42.6)	0.872	0.350
Parenchymatous organ infarction	45 (44.1)	27 (56.3)	18 (33.3)	5.413	0.020

The sample size of superior mesenteric artery stenosis/occlusion was 62 cases. ITIN: Irreversible transmural intestinal necrosis; CT: Computed tomography; SMA: Superior mesenteric artery.