<prompt> In hyponatremia following renal failure, serum sodium should be maintained at what levels ?120 mEqL125 mEqL130 mEqL135 mEqL  <response>: Hyponatremia in CKD population is associated with increased moality, but the effect on renal outcome was unknown.. Hyponatremia serum sodium 120 mEqL was associated with excessive volume and volume depletion, measured as total body water by bioimpedance analysis, in diuretic users, but not in diuretic non-users Ref Davidson 23rd edition pg 366 