... contact surface area if you wipe it? With or with out soap? When a catheter is inserted, mitomycin is instilled into the bladder, is the catheter clamped just to keep the medicine in or is pressure needed to get mitomycin into the surface area of the bladder (the clamp closer to the body might suggest greater pressure/premeability in the bladder). Are there suggested safety techniques for instillation? Clamp vs Plug. Connect a bag to the end of the foley tube to prevent accidental spills should the plug or clamp be inoperable. Is it advisable to anchor the foley?