Microsurgical extramucous ureteroureterostomy in rats

Area of Science:

• Urology
• Microsurgery
• Pediatric Surgery

Background:

• Congenital malformations of the urinary tract require advanced surgical techniques.
• Microsurgical reconstruction is crucial for delicate neonatal and infant surgeries.

Purpose of the Study:

• To refine the microsurgical ureteroureterostomy technique in a rat model.
• To establish a reliable method for urinary tract reconstruction in newborns and infants.

Main Methods:

• Performed microsurgical ureteroureterostomy on 100 rats using 10-0 and 11-0 Nylon and Vicryl sutures on BV-6 and BV-8 needles.
• Assessed renal function and anastomosis permeability via macroscopic examination and intravenous urography.
• Evaluated anastomotic healing using histological and scanning electron microscopy at various intervals.

Main Results:

• Achieved primary healing (per primam) without stenosis in 98% of cases.
• Demonstrated urine-proof anastomoses, preventing scarification.
• Identified extramucous sutures as preferable for preventing leakage and crystallization.
• Confirmed that tubing or nephrostomy is unnecessary for this procedure.

Conclusions:

• The perfected microsurgical ureteroureterostomy technique in rats is highly successful.
• This method provides a valuable contribution to reconstructive urinary tract surgery for congenital anomalies.
• Extramucous suturing is recommended for optimal outcomes in rat ureteroureterostomy.