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HelpTest Code LAB449 Urine Urea Nitrogen, 24 Hour
Performing Lab
Arnot Ogden Medical Center
Ordering Recommendations
Assessment of renal failure (prerenal vs acute kidney injury).
Collect
Urine
Collection Device
24 Hour Collection Jug Free of Preservatives
Specimen Volume
5 mL
Stability (from collection to initiation)
| Room Temp | 2 Hours |
| Refrigerated | 3 days |
Storage/Transport Temperature
Room Temp, Refrigerated
Minimum Requirements
1 mL
Methodology
Enzymatic
Start Date
5/6/2020
Last Review Date
7/12/25 ES
Collection Instructions
See Collection Instructions - 24 Hour Urine.
24 hour urine collection, keep refrigerated during collection period.
Specimen Preparation
Tech will enter 24 hour urine volume.
Invert well before taking aliquot.