Formation of viscous elastic film on surface of mucous layer for protection from external effects during various surgeries (ureteroscopy, cystoscopy, transurethral adenoma resection & radiation therapy of lesser pelvis organs) & protection from harmful impact of bladder content (urina) in case of injury or inflammation of bladder mucous layer ie, cystitis. Temporary protection & restoration of bladder mucous layer during various surgeries (urethra cystoscopy, radiation therapy) while using urological catheter.