GLUCOSE ( 2 HRS AFTER 75 G GLUCOSE), PLASMA

Glucose (2 Hours After 75 g Glucose), Plasma

What it is

The Glucose (2 Hours After 75 g Glucose), Plasma test measures the level of glucose in the blood exactly two hours after consuming a 75-gram oral glucose solution. This test is part of the Oral Glucose Tolerance Test (OGTT) and is commonly used to diagnose diabetes mellitus and prediabetes. It reflects how well the body processes glucose and regulates blood sugar levels after a carbohydrate load.

Uses

This test is used to:

• Diagnose type 2 diabetes mellitus and prediabetes.
• Screen for gestational diabetes in pregnant women.
• Monitor glucose metabolism in high-risk individuals (e.g., obesity, metabolic syndrome).
• Evaluate patients with borderline fasting glucose levels.

Symptoms That May Lead to the Test

Your doctor may recommend this test if you have symptoms suggestive of diabetes, such as frequent urination, excessive thirst, unexplained weight loss, blurred vision, fatigue, or recurrent infections. It may also be advised if you have risk factors like obesity, family history of diabetes, or during pregnancy between 24–28 weeks.

Abnormal Results

Normal: Blood glucose level less than 140 mg/dL at 2 hours.

Prediabetes (Impaired Glucose Tolerance): Blood glucose level 140–199 mg/dL at 2 hours.

Diabetes Mellitus: Blood glucose level 200 mg/dL or higher at 2 hours.

Interpretation should always be done in conjunction with other tests such as fasting glucose and HbA1c.

Risks

The test involves drinking a glucose solution and providing a blood sample. Risks are minimal but may include mild nausea, dizziness, or headache from the glucose load. Blood draw risks include slight pain, bruising, or dizziness at the puncture site.