Jejunal conduits: technique and complications.

Area of Science:

• Urology
• Nephrology
• Gastroenterology

Background:

• Jejunal urinary diversion is a surgical technique used in specific cases, often for malignant diseases requiring pelvic irradiation.
• Ileal conduit operations are a common alternative for urinary diversion.

Purpose of the Study:

• To evaluate the postoperative morbidity and identify complications associated with jejunal urinary diversion.
• To investigate the pathophysiology and contributing factors of the electrolyte syndrome observed after jejunal urinary diversion.

Main Methods:

• Retrospective analysis of 30 patients who underwent various forms of jejunal urinary diversion.
• Clinical and biochemical monitoring for postoperative complications, focusing on electrolyte disturbances.

Main Results:

• Postoperative morbidity was comparable to ileal conduit operations, with a notable exception: a high incidence of reversible hypochloremic acidosis with hyponatremia, hyperkalemia, and uremia.
• This electrolytic syndrome results from ion exchange between jejunal contents and extracellular fluid, exacerbated by renin-aldosterone hypersecretion.
• Contributing factors include limited renal function (GFR < 50 cc/min), long intestinal loops, and inadequate salt intake.

Conclusions:

• Jejunal urinary diversion is associated with a specific electrolyte syndrome correctable by salt administration.
• Patients with limited renal function, on low-salt diets, or requiring long intestinal loops are not recommended candidates for jejunal urinary diversion.
• Long-term salt supplementation may be necessary for some patients following jejunal urinary diversion.