1,25 Dihydroxy Vitamin D to Mayo, Pediatric Only - LG6634


Sunquest Code:MMMISC  
Epic Code:LAB4909Epic Name:Send Out Misc Tests
Synonyms:1, 25 Dihydroxycholecalciferol; 1,25 Dihydroxyvitamin D3; Vitamin D; Calcitriol
Methodology:Extraction/Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS)
CPT Code:----------CPTCODES HERE----------
Turnaround Time:Testing is performed Mon-Fri at approximately 3 pm. Results are reported within 2-4 days.


Collection Instructions

Specimen:Blood
Optimal Volume:3.3 mL
Minimum\Peds Volume:1.6 mL
Container:Red or gold (gel) (Red (no gel))
Patient Preparation:Fasting (4-hour preferred but not required)
Causes for Rejection:Grossly hemolyzed samples.


Processing and Shipping

Specimen Processing:Centrifuge and aliquot 1.5 mL, 0.7 mL minimum. Store at room temperature or refrigerated.
Shipping Instructions:Ship at refrigerated temperature.
Test Performed at or Referral Lab Lab Sendouts  (Mayo Medical Laboratories)
Referral Lab number:DHVD


Interpretive

Reference Range:
Age Male Female
<16 y 24-86 pg/mL 24-86 pg/mL
> 16 y 18-64 pg/mL 18-78 pg/mL
 
Use:As a second-order test in the assessment of vitamin D status, especially in patients with renal disease.

Investigation of some patients with clinical evidence of vitamin D deficiency (e.g. vitamin D-dependent ricketts due to hereditary deficiency of renal 1-alpha hydroxylase or end-organ resistance to 1,25 dihydroxyvitamin D).

Differential doagnosis of hypercalcemia.


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