Vitamin D Testing

Lab Values After Vit-D Supplementation

January 2009

This graph shows the increase in vitamin D levels in this premature infant after supplementation. The green line describes an increase in vitamin D levels which increase up to 150 ng/mL at which the clinicians decided to stop the vitamin D supplementation. The blue line describes the vitamin D2 levels, which were determined using the LC-MS/MS method. The pink line describes vitamin D3 levels. The red dot, which is 1,25-dihydroxy vitamin D, was elevated when the vitamin D level and the calcium was low in this premature infant.

When the vitamin D levels reached normal levels, 1,25-dihydroxy vitamin D normalized. PTH and BAP levels were also normalized in this infant.

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Lab Values After Supplementation

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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?