Category
ROUTINE CHEMISTRY
Sub Category
ORGAN FUNCTION CHECKS
Synonyms/Aliases
BLOOD UREA NITROGEN
Abbreviations
BUN
Type
INDIVIDUAL TEST
Results
results ready in 3 HOURS
Method
SPECTROPHOTOMETRIC
Temp
ROOM TEMPERATURE 7 DAYS; REFRIGERATED, 2-8ºC, 7 DAYS; FROZEN 30 DAYS
Setup
DAILY
Components Parameters
N/A; however concurrent CBC/ PBF ordering is required.
PRE-ANALYTIC CONSIDERATIONS
Test Ordering Instructions
FILL OUT TEST REQUEST FORM FULLY & LEGIBLY.
Patient preparation
NOT APPLICABLE
Sample type
SERUM (HEPARIN PLASMA IS AN ACCEPTABLE ALTERNATIVE).
Container/ preservative
SERUM SEPARATOR TUBE (SST/ GEL) OR PLAIN (RED TOP) VACUTAINER.
Sample volume
AT LEAST 2 ML.
Rejection criteria
LABELING ISSUE (UNLABELED/ MISLABELED); MISSING REQUEST FORM; MISMATCH BETWEEN REQUEST FORM & SAMPLE DETAILS; MISSING AGE/ GENDER; WRONG SAMPLE TYPE; INSUFFICIENT SAMPLE; GROSS LIPEMIA.
Other Instructions
SERUM GEL TUBES SHOULD BE CENTRIFUGED WITHIN 1-2 HOURS OF COLLECTION.
RED-TOP TUBES SHOULD BE CENTRIFUGED AND ALIQUOTED WITHIN 1-2 HOURS OF COLLECTION.
Reference intervals
AGE AND GENDER APPROPRIATE VALUES ARE PROVIDED WITH REPORT
Clinical Utility
USEFUL IN THE EVALUATION OF KIDNEY FUNCTION AND IN MONITORING PATIENTS UNDERGOING DIALYSIS.
Test Limitations/ Confounders
- -N/A