OGTT
Also written as: OGTT — Oral Glucose Tolerance Test
Oral glucose tolerance test, a diagnostic procedure measuring glucose levels after consuming a standardized glucose solution.
Full Definition
The oral glucose tolerance test (OGTT) is a standardized diagnostic procedure used to evaluate glucose metabolism and diagnose diabetes or glucose intolerance in children and adolescents. The test involves measuring fasting glucose levels, followed by administration of a glucose solution (1.75 g/kg body weight, maximum 75g), with subsequent glucose measurements at specific intervals. In pediatric endocrinology, OGTT is particularly useful for diagnosing type 2 diabetes, prediabetes, and glucose intolerance in obese children or those with risk factors. The test requires proper preparation including fasting and normal carbohydrate intake in preceding days.
Usage
Usage note: Specify glucose dose when documenting; pediatric dosing differs from adult protocols.
In Context
- "The OGTT revealed impaired glucose tolerance with a 2-hour value of 155 mg/dL." — Laboratory report
- "An OGTT was ordered to evaluate glucose metabolism in this obese adolescent with acanthosis nigricans." — Clinical assessment