This topic is about dealing with persistent leakage from a urostomy and exploring whether using a tampon to block urine during appliance changes is safe. The person is just a few weeks post-surgery and is facing challenges with frequent leaks, needing to change their appliance multiple times a day. They are using a two-piece system but find it difficult to apply the barrier before urine starts flowing, which disrupts the seal. Here are some helpful tips and insights shared by others:

1. Consider changing the appliance or brand:
- Some have found success by switching brands. For instance, moving from ConvaTec to Hollister's two-piece flanges, which are more flexible.
- Nu-Hope pouches are recommended for their convexity and flexibility, allowing for longer wear times.
- A user of Coloplast Assura one-piece systems found better results with a round flange instead of an oval one.

2. Improve barrier application techniques:
- Warm the flange or wafer with a blow-dryer before applying it, and ensure your skin is completely dry.
- Place a sealing ring, like an Eakin seal, on the flange before applying it.
- After applying, slightly tighten the ostomy belt for about 30 minutes to help the seal set.

3. Time your changes:
- Change the pouch first thing in the morning when the urostomy is less active to minimize urine flow during the change.

4. Manage skin contours and irregularities:
- Check the skin under the wafer for any scars, folds, or depressions, and fill these areas with Eakin seals or ostomy paste.
- Ensure the wafer opening matches the current stoma size. If it's too large, use an Eakin seal until you get the right size.
- Remember that stomas can change size after surgery, so measure periodically.

5. Use additional adhesives and skin protection:
- Apply a thin line of SkinTac around the wafer's edge for extra hold.
- Use Smith & Nephew adhesive remover wipes for easy removal and to protect your skin.
- Apply antifungal powder or Convatec barrier wipes to prevent or treat skin irritations, as healthy skin helps with adhesion.

6. Extend wear-time:
- By following these routines, users have reported extending their wear time from just hours to several days, with some achieving weekly changes.

Regarding the use of a tampon to block urine, no direct safety confirmation was provided. Instead, the focus was on improving appliance fit, timing, and skin preparation to prevent leakage.