This study modified the Mainz pouch procedure using the appendix as the efferent limb, eliminating the need for intussuscepted ileum. This modification proved effective for urinary diversion in cancer patients.
Area of Science:
Urology
Surgical Innovation
Context:
The Mainz pouch procedure is a type of urinary diversion.
It typically requires an intussuscepted ileum for the efferent limb.
The Kock pouch procedure uses a different technique for ureter implantation.
Purpose:
To modify the Mainz pouch procedure by utilizing the appendix as the efferent limb.
To eliminate the requirement for intussuscepted ileum in the Mainz pouch procedure.
To evaluate the efficacy and patient satisfaction with this modified technique.
Summary:
A modified Mainz pouch procedure was performed on four patients (three with bladder cancer, one with prostate cancer) after cystectomy.
The appendix was used as the efferent limb, tunneled into the pouch along with the ureters.
The pouch was drained via a nephrostomy catheter; ureters were splinted.
Three patients experienced ureteral strictures, with two successfully treated by percutaneous dilatation.
The appendix functioned well as the efferent limb in all cases, ensuring continence and facilitating catheterization.
Three out of four patients reported satisfaction with the urinary diversion.
Impact:
The modified Mainz pouch procedure offers a potentially valuable alternative for urinary diversion.
It avoids the need for staples and reduces the required length of intestinal segment.
This technique may be particularly useful for patients where the appendix is viable.
Patients unsuitable for this modification may still be candidates for the original Mainz pouch procedure.
