What is a Blood Glucose Test?
A Blood Glucose Test is a medical test used to measure the amount of glucose or sugar in the bloodstream. The test is commonly used to help diagnose and monitor cases of diabetes as well as other forms of glucose intolerance.
How is a Blood Glucose Test done?
The patient usually has to fast for 8-10 hours prior to the test. A sample of the patient's blood is then taken and tested for the glucose or sugar level. The sample is either taken from the finger or from a vein in the arm. The results of the test are given in milligrams of glucose per deciliter of blood (mg/dl).
Types of Blood Glucose Tests
The type of Blood Glucose Test will depend on the medical condition and the patient's medical history.
• Fasting Blood Glucose Test (FBG): This is a test that is done on an empty stomach. It provides a measure of the sugar levels in the blood after an 8-hour fast or overnight sleep.
• Postprandial Blood Glucose Test (PPBG): This is a test that is done 1-2 hours after a meal. It measures the sugar levels in the blood just after eating.
• Random Blood Glucose Test (RBG): This test is done without regard to meal consumption. It measures the sugar levels in the blood at random times without any preparation.
Why is a Blood Glucose Test done?
A Blood Glucose Test is important for diagnosing and managing conditions related to glucose intolerance such as diabetes, hypoglycemia, and prediabetes. The results of the test help doctors identify whether the patient has a medical condition that requires treatment or if lifestyle modifications need to be made.
When is a Blood Glucose Test done?
A Blood Glucose Test is done when the patient experiences symptoms that are indicative of a condition related to glucose intolerance such as frequent urination, excessive thirst, fatigue, blurred vision, or unexplained weight loss.
Risks of a Blood Glucose Test
A Blood Glucose Test is generally safe and risks are low. However, there is a slight risk of infection or bruising at the site of the needle after a blood sample is taken.
In rare cases, the patient may experience dizziness, fainting or excessive bleeding, in which case medical attention is required.