090-20-1320-01

Sodium, Urine 24-Hour

24-hour urine, Clean containner without preservative added.

Note:
1.  Please keep in refrigerated (2^oC to 8^oC) during collection and transportation.
2.  24-hours volume is required.

24-hour urine, minimum volume 10 mL

Clean container

Wrong preservative type will be reject.

Specimen Type	Temperature	Time
24 hours urine	Refrigerated, 2oC to 8oC	45 days
	Frozen, -20oC	12 months

090-20-1320-01

Sodium, Urine 24-Hour

Ion-selective electrode diluted (Indirect)

Tested daily (24 Hours)

Collected specimen to report within 1.5 hours (90 mins)

Chemistry, Laboratory Department Tel. 13224

7 days

090-20-1320-01

Sodium, Urine 24-Hour

Sodium is the major cation of extracellular fluid; it plays an essential role in the normal distribution of water and in the maintenance of osmotic pressure in extracellular fluid compartments. Decreased levels of sodium may be caused by an excessive use of diuretics, prolonged vomiting, a decrease in the intake of sodium in the diet, and metabolic acidosis. Increased levels of sodium may be found in Cushing’s syndrome, severe dehydration, or in high levels of salt intake without an adequate supply of water.

40 – 220 mmol/24hours

Urinary sodium (Na+) excretion varies with dietary intake, and there is a large diurnal variation with the rate of Na+ excretion during the night being only 20% of the peak rate during the day.

Na+ may be lost in the kidneys as a result of diuretic therapy, salt-losing nephropathies, or adrenal insufficiency, with the urinary Na+ concentration usually more than 20 mEq/L. In these hypovolemic states, urine Na+ values less than 10 mEq/L indicate extrarenal Na+ loss. In hypervolemic states, a low urine Na+ (<10 mEq/L) may indicate nephrotic syndrome in addition to nonrenal causes.

1. Manufacturer’s reagent package insert, Architect® ICT (Na+, K+, Cl-) Sample Diluent, Abbott Laboratories, Diagnostic Division, Abbott Park IL 60064 , May 2016.
2. http://www.mayomedicallaboratories.com (Retrieved: 01 Jan 2019)