Laboratory Test Information Guide

Details for Testosterone (Total), Plasma/Serum

Test Name: Testosterone (Total), Plasma/Serum
Alternate Name(s):  
Laboratory: Core
Specimen Type: Adult:
4.5 mL Light Green top (Li-Heparin) Vacutainer tube

Pediatric:
0-2 years: 0.5 mL Light Green top (Li-Heparin) Microtainer
2-10 years: 3 mL Light Green top (Li-Heparin) Vacutainer tube

Red, Gold, or Lavender (EDTA) top tubes are also acceptable
Collection Information: Minimum volume of plasma or serum required is 700 L for adult samples or 200 L for pediatric samples.
Requisition: GENERAL LABORATORY REQUISITION
Test Schedule: Monday - Friday
0800-1600
Turnaround time from when specimen
is received in testing laboratory:
 
Routine
5 days
Stat
 
 
Reference Range: Male:
Tanner stage 1: ≤ 0.4 nmol/L
Tanner stage 2: ≤ 15.0 nmol/L
Tanner stage 3: 2.3 27.0 nmol/L
Tanner stage 4: 6.2 26.5 nmol/L
Tanner stage 5: 6.5 30.6 nmol/L
20 49 years: 8.6 29.0 nmol/L
≥ 50 years: 6.7 25.7 nmol/L

Female:
Tanner stage 1: ≤ 0.4 nmol/L
Tanner stage 2: ≤ 0.4 nmol/L
Tanner stage 3: ≤ 0.8 nmol/L
Tanner stage 4: ≤ 0.9 nmol/L
Tanner stage 5: ≤ 1.3 nmol/L
20 49 years: ≤ 1.7 nmol/L
≥ 50 years: ≤ 1.4 nmol/L

(based on 6:30 am 1:00 pm collection times)
Effective Date: 2018-03-06
Revised Date: 2018-08-17
Critical Value:  
Interpretive Comments:  
Special Processing:  
Comments: Nandrolone (19-nortestosterone) interferes with this assay.

Biotin may interfere with this test. Samples should not be taken from patients receiving high biotin doses (i.e. > 5 mg/day) until at least 8 hours after the last biotin administration.
Method of Analysis: Roche Electrochemiluminescence
Critical Information Required:  
Storage & Shipment: Store and ship plasma or serum frozen.
System Codes: 
Cerner
TESTO
 
Referred To:  

Questions? Comments? Contact Laura Gopaul