Investigation of inpatient hyponatraemia in a teaching hospital

Abstract

Investigations Nadir sNa Nadir sNa RR P value ≤125 126-128 N=87 N=52 Volume status 73.6% 42.3% 1.74 <0.001 Serum osmo 52.9% 13.5% 4.53 <0.001 Urine osmo 50.6% 15.4% 3.28 <0.001 Urine Na 47.1% 15.4% 3.06 <0.001 Paired osmo-Na 40.2% 9.1% 4.18 <0.001 Serum TFTs 70.1% 46.2% 1.51 0.007 Serum cortisol 45.6% 7.7% 5.97 <0.001 Endocrine input 17.2% 9.1% 1.79 0.318 This retrospective, single-centre study included all inpatients with serum sodium (sNa) ≤128 mmol/l at any point during hospitalisation over a 3-month period.