UA to rule out infection

We have a patient who comes in for his foley cath changes. A week before getting the change, the doctor will sometimes have him do a UA to rule out an infection before the cath is changed. Patient has no symptoms of a UTI or anything. What diagnosis would I use for the UA? He has a cath for retention and I'm not sure if that's the dx I should use.

Thanks

Tori

UA to rule out infection