The intestines secrete mucous regardless of where they're placed in the body — even when attached to the bladder. This is not a problem, but the mucous can block the catheters and lead to blocked urine flow, especially soon after the operation. It's important to irrigate your child's bladder frequently. The nurses and doctors will review bladder irrigation with you several times while your child is in the hospital. The irrigation is simple and just takes practice.Your child will always have mucous in the urine after this type of operation. Again, this is not a problem so long as the bladder is regularly and consistently emptied. If there's increased mucous one day, simply increase the frequency of clean, intermittent catheterization to every two hours and perhaps irrigate the bladder a few times during the day.