Laboratory Test Information Guide

Details for 1,25-Dihydroxy Vitamin D,Serum/Plasma

Test Name: 1,25-Dihydroxy Vitamin D,Serum/Plasma
Alternate Name(s): Calcitriol
1,25 diOH Vitamin D
Laboratory: Endocrinology
Specimen Type: Adult:
5 mL Gold top Vacutainer tube

Pediatric:
0-2 years: 2 x 0.5 mL Red or Gold top Microtainers
2-10 years: 3 mL Red top Vacutainer tube

Light Green top tubes (Li-heparin) or Lavender top tubes (EDTA) are also acceptable
Collection Information: Minimum volume of serum required is 400 L for adult or pediatric samples.
Requisition: GENERAL LABORATORY REQUISITION
Test Schedule: Monday-Friday
0800-1600
Turnaround time from when specimen
is received in testing laboratory:
 
Routine
10 days
Stat
 
 
Reference Range: 60-208 pmol/L
Effective Date: 2015-01-05
Revised Date: 2018-01-15
Critical Value:  
Interpretive Comments:  
Special Processing:  
Comments: The test for 1,25 di-OH vitamin D is not useful to assess sufficiency of vitamin D from diet, supplements, and endogenous synthesis. The 25-OH vitamin D test would be more appropriate for that purpose.

Appropriate Indications for 1,25 di-OH Vitamin D Testing:

RENAL FAILURE

RENAL TUBULOPATHY

SARCOIDOSIS

UNEXPLAINED HIGH PARATHYROID HORMONE LEVEL

PEDIATRIC ENDOCRINOLOGY CONCERN
(E.g. vitamin D-dependent rickets)

When 1,25 di-OH vitamin D testing is being ordered in Cerner, one of these appropriate indications for testing will need to be selected to allow the order to proceed. The options will be: Renal failure, Tubulopathy, Sarcoidosis, Unxplaind hiPTH, Pediatrc endocr.
Method of Analysis: Diasorin Chemiluminescence
Critical Information Required:  
Storage & Shipment: Store and ship serum/plasma frozen.
System Codes: 
Cerner
125VITD
 
Referred To:  

Questions? Comments? Contact Laura Gopaul