Bowel preparation: comparing metabolic and electrolyte changes when using sodium phosphate/polyethylene glycol

Area of Science:

• Gastroenterology
• Nephrology
• Colorectal Surgery

Background:

• Mechanical bowel preparation is crucial for colonic procedures.
• Phosphate-based bowel preparations are common due to cost and outpatient suitability.
• Concerns exist regarding phosphate-induced renal impairment.

Purpose of the Study:

• To compare the side effects of sodium phosphate versus polyethylene glycol for bowel cleansing.
• To evaluate electrolyte and metabolic changes during perioperative care.

Main Methods:

• A double-blind, prospective, randomized study.
• 40 patients undergoing colonic surgery were divided into two groups (20 sodium phosphate, 20 polyethylene glycol).
• Serum and urine electrolyte parameters were monitored perioperatively.

Main Results:

• Both preparations caused electrolyte changes, more pronounced with sodium phosphate.
• Early signs of renal function impairment were observed in the sodium phosphate group.
• Metabolic and electrolyte differences between groups were statistically significant.

Conclusions:

• Widespread use of phosphate-containing bowel preparations may pose risks.
• Patients prone to renal failure or electrolyte abnormalities are particularly vulnerable.
• Polyethylene glycol may be a safer alternative for at-risk populations.