Vitamin D Testing

Introduction

January 2009

Welcome to Mayo Medical Laboratories' Hot Topics. These presentations provide short discussion of current topics and may be helpful to you in your practice.

Our presenter for this program is Dr. Ravinder Singh, Assistant Professor of Laboratory Medicine and Pathology in the Division of Clinical Biochemistry & Immunology at Mayo Clinic. Dr. Singh will be discussing the various forms of vitamin D, the different tests available for assessing vitamin D stores, and the appropriate use of vitamin D testing based on the clinical picture.

Introduction

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Jump to section:

• 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?