The gastrointestinal tract in uremia

Area of Science:

• Nephrology
• Gastroenterology
• Internal Medicine

Background:

• Gastrointestinal (GI) mucosal abnormalities, including edema and ulceration, affect approximately two-thirds of patients who die from uremia.
• Previous research suggested an increased risk of peptic ulceration in uremic patients undergoing maintenance dialysis, but this has been challenged by more recent findings.

Purpose of the Study:

• To review the spectrum of gastrointestinal complications in patients with uremia, focusing on those undergoing maintenance dialysis and renal transplantation.
• To clarify the association between maintenance dialysis and peptic ulceration risk.

Main Methods:

• Literature review of studies investigating gastrointestinal issues in uremic patients.
• Analysis of data concerning peptic ulceration risk in patients on maintenance dialysis.
• Examination of GI complications in renal transplant recipients.

Main Results:

• Common GI issues in uremia include edema, ulceration, bleeding from telangiectasias, constipation, amyloid deposition, and acute pancreatitis.
• Nausea and vomiting are prevalent, though gastric emptying studies show inconsistent results.
• Renal transplant recipients face heightened risks of esophagitis, complicated peptic ulcers, intestinal ulceration, perforation, and acute pancreatitis.

Conclusions:

• While uremia is associated with significant gastrointestinal morbidity, the purported increased risk of peptic ulceration with maintenance dialysis is not supported by current data.
• Renal transplantation introduces a distinct set of gastrointestinal risks, including severe complications like perforation and pancreatitis.