Nitrogen, Urine 24 Hour | Cleveland Clinic Laboratories

Nitrogen, Urine 24 Hour Print

Test Mnemonic

UNIT24

CPT Codes

83520 - QTY (1)

Includes

Time
Volume
Urine Nitrogen, Total

Performing Laboratory

Mayo Clinic Dpt of Lab Med & Pathology

Specimen Requirements

Volume	Type	Container	Collect Temperature	Transport Temperature	Special Instructions
10 mL	Urine, 24-hour (well-mixed)	Clean container	Refrigerate during collection.	Refrigerated

Minimum Specimen Requirements

Volume	Type	Container	Collect Temperature	Transport Temperature	Special Instructions
2 mL

Stability

Environmental Condition	Description
Ambient	7 days
Refrigerated	7 days
Frozen	3 years

Days Performed

Mon, Wed, Fri

Turnaround Time

3 - 6 days

Methodology

Name	Description
Dumas Combustion

Reference Range

Urine Nitrogen, Total
Sex	Age From	Age To	Type	Range	Range Unit
	16 Years	99 Years	Normal	4 - 20	g/24 hrs
	Years	15 Years	Normal	Not established	N/A

Special Info

Indicate total volume on requisition.

Clinical Info

Slightly abnormal excretion rates may be a result of moderate stress or complications such as infection or trauma. Significantly abnormal excretion rates may be associated with severe stress due to multiple trauma, head injury, sepsis, or extensive burns. CAUTION: Measurement of both urine and fecal nitrogen is necessary for the accurate determination of nitrogen balance. During nitrogen balance studies, nitrogen lost from exuding wounds such as burns, and from copious sputum must be included in the patients evaluation.