Appendix 1.
Endoscopy and CT scan grading of upper gastrointestinal tract injuries
| Endoscopic classification based on Zargar’s grading system (14) | |
|---|---|
| Grade 0 | Normal |
| Grade 1 | Superficial mucosal edema and erythema |
| Grade 2 | Mucosal and sub mucosal ulcerations (2A: superficial ulcerations, erosions, exudates and 2B: deep discrete or circumferential ulcerations) |
| Grade 3 | Transmural ulcerations with necrosis (3A: Focal necrosis and 3B: Extensive necrosis) |
| Grade 4 | Perforations |
| Computed tomography grading system (13, 19, 21) | |
| Grade 1 | No definite swelling |
| Grade 2 | Edematous wall thickening without soft tissue involvement |
| Grade 3 | Edematous wall thickening with soft tissue infiltration plus well-demarcated tissue interface |
| Grade 4 | Edematous wall thickening with soft tissue infiltration plus blurring of tissue interface or localized fluid collection around the esophagus or descending aorta |