Research Article
Prediction of Small Bowel Obstruction Caused by Bezoars Using Risk Factor Categories on Multidetector Computed Tomographic Findings
Table 2
MDCT findings in the bezoars, with and without small bowel obstruction.
| MDCT findings | SBO group (n = 32) | Non-SBO group (n = 29) | P value |
| Bezoar features | | | | Major diameter (cm ± SD) | 3.24 0.53 | 1.62 0.72 | <0.0001 | Volume (cm3 ± SD) | 14.89 6.41 | 2.52 2.73 | <0.0001 | CT value (HU SD) | 55.47 23.39 | 173.03 68.04 | <0.0001 | Location [ (%)] | | | | Proximal | 1 (3.1) | 5 (17.2) | 0.128 | Middle | 10 (31.3) | 11 (37.9) | 0.781 | Distal | 21 (65.6) | 13 (44.8) | 0.169 | Type [ (%)] | | | | Calcareous bezoar | 7 (21.9) | 26 (89.7) | <0.0001 | Phytobezoar | 24 (75.0) | 3 (10.3) | <0.0001 | Trichobezoar | 1 (3.1) | 0 | 1 | Secondary changes | | | | Bowel changes | | | | Dilatation (cm SD) | 3.26 0.53 | 2.04 0.26 | <0.0001 | Obstructive degree [ (%)] | | | | No | 0 | 29 (100) | <0.0001 | Mild | 13 (40.6) | 0 | Moderate | 15 (46.9) | 0 | Severe | 4 (12.5) | 0 | Wall thickening (mm SD) | 3.56 0.83 | 1.89 0.40 | <0.0001 | Wall enhancement (HU SD) | | | | Unenhanced phase | 35.69 5.85 | 34.03 6.40 | 0.296 | Arterial phase | 43.19 15.06 | 28.93 13.33 | 0.0001 | Portal phase | 65.06 17.41 | 46.14 11.50 | <0.0001 | Target sign [ (%)] | 13 (40.6) | 0 | 0.0001 | Mesenteric changes [ (%)] | | | | Vascular engorgement | 17 (53.1) | 0 | <0.0001 | Mesenteric haziness | 11 (34.4) | 0 | 0.002 | Ascites | 6 (18.8) | 3 (10.3) | 0.355 |
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The absolute difference in the attenuation value of the bowel wall between the unenhanced and contrast-enhanced images.
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