Anuria during pneumoperitoneum in infants and children: a prospective study

Area of Science:

• Pediatric Surgery
• Nephrology
• Anesthesiology

Background:

• Transient oliguria is recognized during laparoscopic surgery.
• No prior data existed on pneumoperitoneum's renal impact in pediatric patients.

Purpose of the Study:

• To investigate the effects of pneumoperitoneum on renal function in children undergoing laparoscopic surgery.

Main Methods:

• Prospective study of 30 children with normal kidney function.
• Monitored urine output via transurethral catheter.
• Assessed renal blood flow using Doppler ultrasound (resistive index).
• Analyzed serum and urine markers (cystatin C, creatinine, urea nitrogen).

Main Results:

• Urine output decreased within 45 minutes of pneumoperitoneum in all patients.
• Anuria occurred in 88% of children <1 year vs. 14% of older children (P < .001).
• Oliguria affected 32% of children aged 1-15 years.
• Renal blood flow and kidney function markers showed no significant changes up to 24 hours postoperatively.
• Infusion volume did not correlate with urine output.

Conclusions:

• Pneumoperitoneum induces temporary anuria/oliguria in pediatric patients, particularly those younger than 1 year.
• This effect is fully reversible with no lasting impact on renal function.
• Urine output should not guide fluid administration during pediatric pneumoperitoneum.