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Test Code LAB749 Urea Nitrogen Clearance

Test Performed By

Cayuga Medical Center, Main Laboratory

Container Name

URINE 24H

AND

SERUM

Acceptable Preservatives

Test Preservative/Acceptable (Yes/No)
Unpreserved Acetic Acid Boric Acid Sodium Carbonate 6N HCL
Urine Creatinine LAB712 Yes No* Yes No* Yes
 
Urine & Serum Creatinine Clearance LAB1765** Yes No* Yes No* Yes
 
Urine Total Protein LAB441 Yes No No* No No
 
Urine Microalbumin LAB410 Yes No No* No No
 
Urine Urea Nitrogen LAB449 Yes Yes Yes Yes Yes
 
Urine & Serum Urea Nitrogen Clearance LAB749** Yes Yes Yes Yes Yes
 
Urine Electrolytes LAB19204 Yes No* No* No No
 
Urine Potassium LAB436 Yes No* No* No* No*
 
Urine Sodium LAB446 Yes No* No* No No*
 
Urine Chloride LAB375 Yes No* No* No* No
 
*If unable to perform in house testing but able to send out, cancel and order a miscellaneous test (GO23910). Refer to Mayo Clinic Labs (MCL) Urine Preservative Chart for test codes and additional preservative information.
 
**Tests require both serum and urine specimens

Day(s) and Time(s) Test Performed

Monday through Sunday; Continuously

CPT Codes

84545

Temperature

Refrigerated

Specimen Type

Urine and Serum

Specimen Volume

30 mL Urine

1 SST

Minimum Specimen Volume

10 mL, urine AND 4 mL serum

Specimen Stability

Stability: 48 hours

List Price

$128.00

Clinical and Interpretive

Urea nitrogen clearance falls progressively with increasing renal failure.