Hi... Some thoughts on setting up the flange to avoid leaks... I have an ileostomy, use the Coloplast two-part system, am 6 ft 2 in at 225 lbs... not a big stomach but better built for comfort than speed!!... if you get the drift. It is important to realize that the bigger the gut, the greater the difficulties in avoiding leakage issues. I change my setup once per week and seldom have a leakage issue. This is the process I follow when changing the flange (or wafer)
1. Remove the existing flange and note where the leakage(s) occurred, or where some fecal matter may have made its way to the skin.
2. Cut the hole to fit the stoma with no more than a 1 cm space between the flange and stoma
3. Using about 80% of a standard Coloplast paste strip, I roll it between my palms to make about a 3 - 4 inch round (rather than square) strip... I then roll it out around the hole on the wafer. There will be a small gap between the paste and the wafer... roll another small bit of material and fill that gap.... the objective is to eliminate any cavities around the stoma once it is in place... the paste on the back side of the wafer plate will, once against the body, warm up and if pressure is used to keep the wafer pressed to the skin...it will cause the paste to creep up around the stoma to fill that 1 cm gap...once properly sealed around the stoma..it generally will not leak.
4. Remove the old bag and flange... clean the area with baby wipes, dry shave if necessary and apply some Cavilon skin barrier.
5. It's important at this stage to bring body heat to the materials in the wafer and the paste... this sets up the bonding between the wafer and your skin... I usually tape the edges of the wafer using 3M transfer tape (commonly used in hospitals) for 12 hours or so...also snug pants help in the transfer of body heat and keep the wafer in place
6. Install the bag and SNAP the clip... several times I have either not secured the bag properly or not snapped the lock... well surprise surprise, the bag either falls off when you open your pants or it leaks...
7. Always keep lots of tape close... if you are going to bend over a lot...tape the flange, if it's hot or you are exercising, tape the flange... moisture will weaken the bondability of the wafer...taping it will reestablish the bond...
8. Keep an open practical mind about this issue...experiment...identify the cause and effect relationship and don't be afraid to create a solution...or try other products.
Best of Luck