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Perforation of the gastrointestinal tract may cause various complications and may require emergency surgery, even in patients with significant comorbidities.

Seventeen consecutive patients with indication for surgery due to a visible gastrointestinal perforation were treated with OTSC application. In this study, cause of perforation, estimated size, location, rate of perforation closure, outcome and complications were reported.

In 11 of 17 patients (64.7 %), OTSC application resulted in permanent closure of perforations, thus avoiding surgery. All 11 successful cases had smaller perforation lengths (5.5 ± 1.9 mm, p < 0.02), widths (3.7 ± 0.9 mm) or area (21.1 ± 9.1 mm²), had vital margins of perforations and 1.1 ± 0.3 OTSC per patient were necessary. The six unsuccessful cases (35.3 %) showed larger perforation lengths (13.4 ± 8.8 mm, p < 0.02), widths (5 ± 4.5 mm) and area (97.6 ± …