How much volume can be held initially after Mitrofanoff?

• A. Very little- a few ounces
• B. 400-800 mL
• C. 600-1000 mL
• D. 20 mL

Answer: (A)

After Mitrofanoff, you have a catheterizable channel to the bladder, but the bladder itself hasn’t been enlarged yet. The initial reservoir capacity is small, so only a small amount of urine can be held at first—roughly a few ounces. This is why immediate post-op management focuses on regular intermittent catheterization to empty the bladder rather than relying on a large stored volume. Larger volumes listed in the other options would only be possible with bladder enlargement or augmentation over time, not right after the procedure. A capacity as low as about 20 mL would be impractical, so the best answer reflects that initial, small holding capacity.