Gestational Diabetes Testing Paradigms in a Rural Office November 7, 2014.

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Presentation transcript:

Gestational Diabetes Testing Paradigms in a Rural Office November 7, 2014

Learning Objectives Understand normal glucose levels in pregnancy. Define Gestational Diabetes Mellitus Understand testing for Gestational Diabetes Mellitus

What's normal? Patterns of Glycemia in Normal Pregnancy: Should the current therapeutic targets be challenged? Teri Hernandez PhD RN et al ; Diabetes Care July :7 p Pooled Analysis of approximately 45 years of data concerning pregnant women with normal BMI and normal glucose tolerance. FBS = 71 mg/dl 1 Hour postprandial = 109 mg/dl 2 Hour postprandial = 99 mg/dl

When did we start testing and how? Non challenge testing (Risk factors only) Challenge Testing 1973 O'Sullivan and Mahan proposed the one hour glucose tolerance test International Association of Diabetes and Pregnancy Study Group recommended a single 2 hour diagnostic glucose challenge test. Alternative Testing Jelly Beans, Candy Bars, Proscribed Meals

A Word About Statistics Sensitivity Positive in disease How many people who have the diagnosis are identified as positive. Specificity Negative in Health How many people without the diagnosis are identified as negative.

Data One year prior and one year following start of 2 hour GTT One hour GTT: 259 Positive screens: 68 Positive 3 hour gtt: 11 (4.2%) Time to teaching: 16.4d (7-35d) Two hour GTT: 286 Positive tests: 29 (10.1%) Time to teaching: 6.5d (0-15d) Cost….

Are making a difference? Why do we care?

Outcomes Australian Carbohydrate Intolerance Study in Pregnant Women, ,000 women NICHD Maternal Fetal Medicine Network, women Hyperglycemia and Adverse Pregnancy Outcome Study 15 Centers; 9 Countries; 23,316 women 1 Hour GTT

Summary How do we test for Gestational Diabetes. ACOG continues to recommend the 2-step diagnostic approach to screening. What are normal values in pregnancy. Importance of diagnosis and management. Are we teaching for the future?