Laboratory: Clinical Biochemistry  (SENDOUTS)
Test Name:
VITAMIN D (1,25-DIHYDROXY) - (S)
Test Code: D125
Clinical Information:
Alternate Name(s): Calcitriol, 1,25-Hydroxy Vitamin D; 1,25-Dihydroxyvitamin D
Test Indications: This test is not appropriate for diagnosing vitamin D deficiency or insufficiency. For this purpose, see: VITAMIN D (25-HYDROXY) - (S)

 

1,25-OH vitamin D should only be ordered in the following clinical conditions:
 

1) Clinical evidence of vitamin D deficiency due to hereditary deficiency of renal 1-alpha hydroxylase or end-organ resistance to 1,25-dihydroxy vitamin D.
2) Hypercalcemia or renal failure in addition to Vitamin D, 25-Hydroxy testing.

 

Test Approval Requirements: F260-11-02 Biochemistry Approval for Test Referral Form

This test is available without approval to Endocrinologist and Nephrologist only.

All other requests must be approved by a clinical biochemist using the designated test approval form.


See F10-50-45D Approved Physicians for Specialist Endocrinology Requisition
 
Collection Devices:
Preferred Device:
Alternate Device:
1 - Microtainer(s) - Plain Serum, NO GEL (0.5 mL) to fill line
Serum GEL tubes and BarricorTM tubes are not acceptable.
Specimen Required:
Serum: 2.0 mL
Pediatric Serum: 1.0 mL

Specimen Stability: 

Ambient: 2 days

Refrigerated: 14 days

Frozen:  >1 year
Referral:

Shipping & Storage: Separate and freeze as soon as possible. Store and send frozen.

Referred Out Location: 

Specimen referred from HSC-MS5 to:
In-Common Laboratories
57 Gervais Drive
North York, Ontario
M3C 1Z2
Telephone: (416) 422-3000
Test ID: 125VITD
Testing location: Mount Sinai Hospital, 600 University Avenue, Toronto ON
Requisition:
Reference Values:
Reference Intervals: 48 – 190 pmol/L

 Method of Analysis: DiaSorin Chemiluminescence
Availability:
Within 2 Weeks
See Also:
More Information: