Clinical Research Directory

Topical Application of Sucralfate in Promoting Healing of Esophageal Ulcers After Esophageal Varices Ligation

Patients with EV bleeding often suffered from hematemesis, Tarry stool, and blood loss. Standard treatment for bleeding esophageal varices includes hemodynamic stabilization, pharmacological control, and endoscopic intervention. For endoscopic intervention, endoscopic variceal ligation (EVL) is the first-line therapy with 95% initial hemostasis success rate. However, after variceal ligation, esophageal ulcers form 3 days later. These ulcers expose underlying vessels in friable esophageal mucosa, exacerbated by portal hypertension and coagulopathy in cirrhosis patients. Bleeding peaks around day 5-10 when bands detach. Among these patients, 7-9% of patients experience recurrent bleeding as a result. Recurrent bleeding from esophageal ulcers carries an extremely high mortality rate, particularly in patients with advanced stage cirrhosis. Therefore, how to promote esophageal ulcer healing and prevent ulcer rebleeding is an important clinical issue. Proton pump inhibitors (PPIs) are the primary drugs for preventing and treating gastric ulcers, but clinical evidence for their role in preventing post-ligation esophageal ulcers is insufficient. Sucralfate, a complex of aluminum hydroxide and sucrose octa sulfate, can bind to the wound base. This protective barrier can prevent the wound from further environmental injury. Sucralfate has been widely used for wounds and ulcer treatment, e.g., skin wounds, oral ulcers, and peptic ulcers. Our recent clinical trial also proved topical sucralfate can prevent postpolypectomy bleeding. Therefore, this study aimed to investigate whether the topical administration of sucralfate after standard endoscopic hemostasis can promote the esophageal ulcer healing and reduce the rebleeding event.

Examining the Effectiveness of DermGEN™ in the Treatment of Diabetic Foot Ulcers in First Nations People

The study will examine the effectiveness of a decellularized dermal matrix (i.e., DermGEN™) in improving wound healing, quality of life and associated costs of treatment of DFUs in First Nations people living in the Northwestern Ontario Communities. First Nations people with active diabetic foot (DFU) ulcer attending a wound care clinic located at the Rainy River district office. An interventional, two-arm, randomized, prospective study of (1) standard of care (control) vs. (2) DermGEN™ - a decellularized dermal matrix (treatment) will be used in the treatment and management of DFU. Patients will be randomized to each arm (n=60 per arm) based on power calculations using data from our Pilot study.