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The Gallbladder Function after Gastric Bypass Surgery - Trial

Primary Objective: To assess the impact of RYGB on gallbladder function (during a follow-up interval of 1 year). We will assess the fasting volume, the ejection fraction and the residual volume of the gallbladder. In addition, we will compare serum…

Clinical evaluation of the efficacy of methylnaltrexone in resolving constipation induced by different opioid subtypes combined with laboratory analysis of immunomodulatory and antiangiogenic effects of methylnaltrexone

To compare the efficacy of a fixed dose of SC methylnaltrexone to induce laxation in patients receiving palliative care with constipation due to either fentanyl, oxycodone or morphine sulphate (opioids with different mechanisms of action). Secondary…

A randomized clinical trial to evaluate the efficacy of polyethylene glycol vs psyllium fiber to prevent rebleeding in patients hospitalized with bleeding diverticular disease.

To evaluate the efficacy of laxatives (polyethylene glycol) versus supplementation of fibers on the incidence of rebleeding in patients hospitalized for colonic diverticular bleeding.