msr262

I had a hyponatremic elderly patient (Serum Na ~127, was taking diuretics and forcing fluids, had a suspected seizure the week prior) in my last clinical, and our care plans always get submitted as part of our grade. My clinical instructor is a bit of a stickler. I'm using NANDA 2015-2017 and the only dx for fluid electrolyte imbalances is an "at risk for" and my instructor is adamant that we can't use 'related to and as evidenced by" with potential nursing diagnoses. I really am lost as to what's the best nursing diagnosis for this patient (has to be a physiological one for this particular assignment) since the patient has an actual electrolyte balance. Are there any other NANDA diagnoses I should consider instead? Thanks any insight is appreciated, I'm still very new to writing care plans and I'm not very far along in my nursing education.