- Patients who present with a gastric or duodenal ulcer (major dimension of the ulcer must be ≥ 5 mm and ≤ 20 mm) with endoscopic appearance of spurting, oozing, or nonbleeding visible vessel (NBVV) Patients presenting with adherent protruding clot are eligible if, after removal of the clot by irrigation, the underlying lesion is classified as spurting, oozing or a NBVV. Patients with an actively bleeding ulcer or a NBVV within a hiatal hernia are eligible if the ulcer is located below the Z-line)