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HelpTest Code LAB5043 BUN/Creatinine
Performing Laboratory
Asante Rogue Regional Medical Center
Asante Three Rivers Medical Center
Asante Ashland Community Hospital
Performing Department
Chemistry
Specimen Required
(submit one of the following tube types)
Lithium Heparin Green top tube (4.0 mL)
Specimen Minimum Volume
Neonatal minimum volume: 0.4 mL whole blood
Specimen Stability
Centrifuge and refrigerate within 2 hours of collection.
Spun SST is stable for 24 hours if refrigerated at 2° to 8° C.
Serum stable 48 hours if aliquoted and refrigerated at 2° to 8° C.
Reject Due To
- Lacking Two Patient Identifiers
- QNS – Quantity Not Sufficient
- Clotted
Day(s) Performed
Monday through Sunday
Method Name
Same as BUN and Creatinine stand alone tests.
BUN Urea is hydrolyzed enzymatically by urease to yield ammonia and carbon dioxide. The ammonia and α-oxoglutarate are converted to glutamate in a reaction catalyzed by L-glutamate dehydrogenase (GLDH).
Creatinine: Kinetic alkaline picric acid