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Item Value
Approval req'd? No
Available Stat? No
Test code LEPN
Performed by Quest
Sendout? Yes
Method Electrochemiluminescence (ECL)
Container type Red top, Gold top
Amount to Collect 2 mL blood
Sample type Serum
Preferred volume 1 mL serum
Min. Volume 0.2 mL serum
UCSF Rejection Criteria Markedly icteric or hemolyzed samples
Processing notes Refrigerate sample. Order Quest # 90367
Ref Lab Rejection Criteria Markedly icteric or hemolyzed samples
Normal range Adult Lean Subjects (18-61years) with BMI range of 18-25:
Males 1.2 - 9.5 ng/mL
Females 4.1 - 25.0 ng/mL

Adult Subjects (19-60 years) with BMI range 25-30:
Males 1.6 - 20.9 ng/mL
Females 13.1 - 40.8 ng/mL

Pediatric: Male Female
Prepubertal 1.6-10.8 ng/mL 1.7-10.6 ng/mL
Tanner Stages II-III 2.1-11.6 ng/mL 2.6-11.5 ng/mL
Tanner Stages IV-V 3.4-10.2 ng/mL 3.4-13.0 ng/mL
Stability Room temperature 8 hours, refrigerated 2 weeks, frozen at -20C 5 weeks.
Turn around times Set up 2x per week. Turnaround 3-10 days
CPT coding 82397-90
LOINC code 21365-2
Last Updated 9/25/2011 7:23:19 PM
Entry Number 605
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