Vitamin D Testing

Various Vitamin D Tests

January 2009

So, we have three pools of vitamin D in circulation: Vitamin D, 25-hydroxy vitamin D, 1,25-dihydroxy vitamin D. Vitamin D test is commonly not used in clinical laboratories. Most of the time, vitamin D status is determined by measuring 25-hydroxy vitamin D in the clinical labs and is the recommended test and is a test of the choice for determining vitamin D status. 1,25-dihydroxy vitamin D should be used only in rare situations.

< Previous Slide

Various Vitamin D Tests

Next Slide >

 

Jump to section:

• Introduction
• Objectives
• Rickets
• UVB Light
• Vitamin D Deficiency
• Interaction Between Vitamin D and Calcium
• Vitamin D3
• Vitamin D2
• Various Vitamin D Tests
• History of 25-OH Vitamin D Testing
• Accreditation Agencies for Precision Among Peers
• Quality of the 25-OH Vitamin D Testing
• 25-OH Vitamin D Volume
• Reference Ranges for 25-OH Vitamin D
• Various Vitamin D Tests
• Case Study - Rickets in a Premature Infant
• Birth History
• Ionized Calcium
• Fractures Identified on Routine Radiographic Surveillance for Line Placement
• Vitamin D Supplementation
• Lab Values After Vit-D Supplementation
• Mother's History
• Infant's X-ray
• Mother's Creatinine
• The Connection Between the Mother and the Infant
• Summary
• Questions?