Dexamethasone, Serum or Plasma by LC-MS/MS
2003248
Ordering Recommendation
 
Mnemonic
DEXA TMS
Methodology
Liquid Chromatography-Tandem Mass Spectrometry
Performed
Sun
Reported
1-8 days  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
Specimen Required
Patient Preparation
It is recommended that the specimen be collected between 6-11 a.m.  
Collect
Serum separator tube, lavender (EDTA), pink (K2EDTA), or green (sodium heparin).  
Specimen Preparation
Separate serum or plasma from cells ASAP or within 2 hours of collection. Transport 1 mL serum or plasma. (Min: 0.5 mL)  
Storage/Transport Temperature
Refrigerated.  
Unacceptable Conditions
Room temperature specimens.  
Remarks
  
Stability
After separation from cells: Ambient: Unacceptable; Refrigerated: 1 week; Frozen: 6 months  
Reference Interval
Adults baseline: Less than 50 ng/dL
8:00 AM draw following 1 mg dexamethasone between 11:00 pm and 12:00 am the previous evening: 140 - 295 ng/dL
8:00 AM draw following 8 mg dexamethasone (4 x 2 mg doses) between 11:00 pm and 12:00 am the previous evening: 1600 - 2850 ng/dL  
Interpretive Data


See Compliance Statement B: www.aruplab.com/CS  
Note
 
CPT Code(s)
80299
Components
Component Test Code*Component Chart Name
2003249Dexamethasone, Serum or Plasma, LC-MS/MS
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases