1. hypoalbuminemia is one of reasons of hypocalcemia
when the serum albumin is low, it decreases the amount of protein bound calcium and lowers the total measured serum calcium. the calcium level must be corrected to reflect the low albumin.
Correct Ca = observed Ca + 0.8(normal albumin - observed albumin)
2. renal diagnostic tests: urine sodium, urine potassium, urine sodium/potassium ratio, BUN, creatinine, Creatinine clearnace