Hemostatic powders used to manage upper gastrointestinal bleeding continue to exhibit high rebleeding rates. Previously, self-propelling thrombin powder (SPTP) sprayed endoscopically managed severe Forrest Class 1A bleeds. Here, we evaluate SPTP in a 3-day recovery model of diffuse ulcerated bleeding. Five anesthetized pigs underwent an endoscopic mucosal snare resection to trigger a diffuse ulcer bleed and were treated with SPTP. The time to hemostasis and the amount of powder delivered were measured. Pigs were recovered and monitored. Pigs achieved hemostasis in 4.5 +/- 1.2 min (mean +/- SEM; n=5). At 3 days post-procedure, rescope showed no rebleeding in any animals. Measured blood parameters were not significantly different from baseline. There were no signs of foreign bodies or thromboembolism during gross necropsy and histopathology of key organs. SPTP is a promising novel material that stopped diffuse ulcer bleeds in 5 pigs without rebleeding or adverse local or systemic events.
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