Final answer:
All of the levels listed (Fasting glucose ≥ 92 mg/dL, 1-hour glucose ≥ 180 mg/dL, and 2-hour glucose ≥ 153 mg/dL) are indicative of Gestational Diabetes Mellitus in the 3 hr GTT. Therefore, the correct answer is (d) All of the above.
Step-by-step explanation:
The question relates to the diagnosis of Gestational Diabetes Mellitus (GDM) using a 3-hour Oral Glucose Tolerance Test (3 hr GTT). Through this test, the patient's ability to regulate blood glucose levels after ingesting a glucose solution is assessed. The test is recommended for individuals with suspected diabetes mellitus showing normal or slightly elevated fasting blood glucose levels but no glucosuria, and those whose post-prandial or random blood glucose levels are within or above the normal range. Indicators of GDM are specific blood glucose levels measured at various intervals after glucose ingestion.
The following levels are indicative of GDM during a 3 hr GTT:
- Fasting glucose ≥ 92 mg/dL
- 1-hour glucose ≥ 180 mg/dL
- 2-hour glucose ≥ 153 mg/dL
In a normal glucose tolerance test, the blood glucose level would peak within the first hour and then decline to normal levels after about 2.5 hours. However, for those with GDM, glucose levels would remain elevated beyond this period. Therefore, the correct answer to the question would be (d) All of the above, as each listed measurement surpasses the normal threshold indicating potential gestational diabetes.