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Glucose Challenge Test

Aka: Glucose Challenge Test

Indication: Gestational DiabetesScreening Test
1. All pregnant patients at 24-28 weeks gestation
2. Test with initial Prenatal Labs if indicated below
  1. Overweight patient
  2. Family History of Diabetes Mellitus
  3. Age over 30 years
  4. Prior history of Glucose Intolerance
  5. Prior pregnancy complication
    1. Fetal Macrosomia
    2. Intrauterine Fetal Demise (Stillborn)
    3. Pregnancy Induced Hypertension (PIH)
    4. Polyhydramnios
    5. Congenital defect
Protocol
1. Patient ingests 50 gram Glucola Drink
2. Serum Glucose measured after 1 hour
Interpretation
1. Serum Glucose >130 mg/dl suggests gestation diabetes
2. Obtain Glucose Tolerance Test 3 hour if positive
Efficacy
1. Test Sensitivity: 90% (80% if 140 mg/dl cut-off used)
2. Test Specificity: 87%
References
1. (2001) Obstet Gynecol 98:525-38

Family Practice Notebook

Patients should address specific medical concerns with their physicians.

Although access to this page is not restricted, the information found here is intended for use by medical providers.

This page was written by Scott Moses, MD, last revised on 10/21/2007 and last published on 5/14/2013.

This is one of 5887 pages in the Family Practice Notebook