Laboratory Test Information Guide

Details for Urea,Plasma

Test Name: Urea,Plasma
Alternate Name(s): Blood Urea
Laboratory: Core
Specimen Type: 4.5 mL Green top Vacutainer

Pediatric:
0-2 yrs: Green top Microtainer (BD 365985)
2-10 yrs: 3 mL Green top
Collection Information: Collect blood aseptically in a Vacutainer tube.

Minimum volume required for a pediatric sample is 0.2 mL
Requisition: GENERAL LABORATORY REQUISITION
Test Schedule: As required
Turnaround time from when specimen
is received in testing laboratory:
 
Routine
4 hours
Stat
1 hour
 
Reference Range: 
Premature:
<2.7 mmol/L
0-5 months:
<7.0 mmol/L
6 months-17 years:
<8.0 mmol/L
18 years-65 years:
<8.3 mmol/L
>65 years:
<11.9 mmol/L
Effective Date: 2008-11-15
Revised Date: 2014-02-25
Critical Value:  
Interpretive Comments: Increased in renal failure, dehydration and high protein intake. Urea/Creatinine ratio is normally 50-60:1 and may be increased in hypovolemia or dehydration.

Note: Correct terminology is Blood Urea, not BUN.
Special Processing:  
Comments:  
Method of Analysis: Enzymatic Photometric
Critical Information Required:  
Storage & Shipment:  
System Codes: 
Cerner
U
 
Referred To:  

Questions? Comments? Contact Laura Gopaul