ALDOSTERONE, 24-HOUR URINE
5 mL (1 mL min.) aliquot of 24-hour urine. Keep refrigerated during collection. Add boric acid (1g/100 ml urine) to the 24-hour collection to maintain pH below 7. 5. Mix well and aliquot. Ship refrigerated or frozen. Record 24-hour volume on urine container and test request form.
Sample by Wed 1 pm
Report 3rd Day Evening
A complete investigation of Aldosterone pathophysiology must include assessment of PLASMA RENIN, ACTIVITY.