The Insulin (4 Hrs after 75 Grams Glucose) test is used to measure the level of insulin in the blood four hours after a person consumes 75 grams of glucose. This test is often used to evaluate insulin resistance and to diagnose or monitor diabetes.
When this test is required
This test is usually requested as part of an OGTT to evaluate insulin resistance or to diagnose or monitor diabetes.
What the Test Detects
This test measures the level of insulin in the blood four hours after a person consumes 75 grams of glucose. Insulin is a hormone produced by the pancreas that helps regulate blood sugar levels.
Preparation for the Test
The patient must fast for at least 8-12 hours before the test. They should also avoid smoking and caffeine for several hours prior to the test. The patient may be asked to stop taking certain medications before the test.
Sample Requirements
This test requires a blood sample, which is usually taken via a venipuncture (needle in the vein).
Additional Notes
The OGTT, which includes the Insulin (4 Hrs after 75 Grams Glucose) test, can be used to diagnose gestational diabetes in pregnant women. The test is also used to monitor individuals who have had bariatric surgery.
