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15 (R)-15-methyl prostaglandin E2 does not prevent gastrointestinal bleeding in seriously ill patients
Abstract:
A prospective, randomized trial was designed to compare the relative efficacy of 15 (R)-15-methyl prostaglandin E2 with antacid (usually Mylanta II) in 46 patients admitted to a respiratory-surgical intensive care unit. Bleeding was assessed by a modification of the Hemoccult slide test. Three of 22 patients in the antacid group bled, and 12 of 24 patients in the prostaglandin group bled, for a highly significant difference (p = 0.008). Patients in whom prophylaxis failed tended to have a greater number of risk factors. Other prostaglandin analogues that do not require conversion from an inactive to an active form, may be more useful than the agent we studied. Based on currently available data, the hourly titration of the gastric juice to a pH of greater than 3.5 remains the preferred method of prophylaxis for acute bleeding from the stomach in seriously ill patients.
Insights
This study found that antacids were more effective than prostaglandin E2 in preventing gastrointestinal bleeding in critically ill patients. Antacid prophylaxis is recommended over this specific prostaglandin for patients at risk of stress ulcers.
Area of Science:
- Critical Care Medicine
- Gastroenterology
- Pharmacology
Background:
- Critically ill patients in intensive care units are at high risk for stress-related gastric bleeding.
- Prophylaxis is crucial to prevent potentially life-threatening gastrointestinal hemorrhage.
Purpose of the Study:
- To compare the efficacy of 15 (R)-15-methyl prostaglandin E2 versus antacids in preventing upper gastrointestinal bleeding.
- To identify risk factors associated with prophylaxis failure in this patient population.
Main Methods:
- A prospective, randomized trial involving 46 patients in a respiratory-surgical intensive care unit.
- Patients received either 15 (R)-15-methyl prostaglandin E2 or antacid (Mylanta II).
- Bleeding was monitored using a modified Hemoccult slide test.
Main Results:
- A significantly lower incidence of bleeding was observed in the antacid group (3/22) compared to the prostaglandin group (12/24) (p = 0.008).
- Patients experiencing prophylaxis failure had a higher number of identified risk factors.
- The studied prostaglandin analogue showed lower efficacy than anticipated.
Conclusions:
- Antacids demonstrated superior efficacy in preventing stress-induced gastric bleeding compared to 15 (R)-15-methyl prostaglandin E2 in this cohort.
- Hourly gastric pH titration to >3.5 remains a preferred prophylactic method for seriously ill patients.
- Further research into other prostaglandin analogues may be warranted.