Final answer:
The nurse should reassure the patient that the presence of mucus in the urine is normal after the creation of an ileal conduit.
Step-by-step explanation:
The nurse's most appropriate response would be to reassure the patient that the presence of mucus in the urine is an expected phenomenon after the creation of an ileal conduit for the treatment of invasive bladder cancer. Mucus in the urine can be a normal part of the healing process and doesn't necessarily indicate an infection or complication. It is important for the nurse to provide education and support to the patient to alleviate any concerns.