How much urine volume can an Indiana pouch reservoir typically hold?

• A. 200-400 mL
• B. 400-800 mL
• C. 800-1200 mL
• D. 100-200 mL

Answer: (B)

The key idea is how much a continent urinary reservoir can store while keeping pressures low. The Indiana pouch is made from detubularized ileal tissue to create a compliant, low-pressure reservoir, so it can hold a modest to substantial amount of urine between catheterizations. In typical practice, its usable capacity falls in the 400–800 mL range. This allows patients to interval catheterize every few hours instead of constantly, without overdistending the reservoir. Volumes much smaller would mean frequent catheterizations, while volumes much larger are less common and can increase the risk of leakage or high-pressure fill. So, 400–800 mL reflects the usual, comfortable storage capacity for this type of reservoir.