I have this book it's called Handbook of Nursing Diagnosis - its by Lippincotts. It was very helpful to me. However, the only nrsng diagnosis that I could find with regard to urination were:
Impaired urinary elimination, urinary retention, total urinary incontinence, functional urinart incont., reflext urin. incont., urge urin. incont., risk for urge urin. incont., stress urin. incont., and meturational enuresis.
To be honest, I don't think that any of those would apply to your pt the way it needs to. Urinary sepsis is obviously a urinary infection - perhaps something related to infections even though it may not be specific to urine?? Sorry I wasn't more of a help