|How is it used?|
The blood glucose test is ordered to measure the amount of glucose in the blood right at the time of sample collection. It is used to detect both hyperglycemia and hypoglycemia and to help diagnose diabetes. Blood glucose may be measured on a fasting basis (collected after an 8 to 10 hour fast), randomly (anytime), post prandial (after a meal), and/or as part of an oral glucose tolerance test (OGTT / GTT)
When is it ordered?
Blood glucose testing can be used to screen healthy, asymptomatic individuals for diabetes and pre-diabetes because diabetes is a common disease that begins with few symptoms. Screening for glucose may occur during public health screenings or as part of workplace health programs. It may also be ordered when a patient has a routine physical exam. Screening is especially important for people at high risk of developing diabetes, such as those with a family history of diabetes, those who are overweight, and those who are more than 40 to 45 years old.
The glucose test may also be ordered to help diagnose diabetes when someone has symptoms of hyperglycemia, such as:
- Increased thirst
- Increased urination
- Blurred vision
- Slow-healing infections
or symptoms of hypoglycemia, such as:
- Blurred Vision
Blood glucose testing is also done in emergency settings to determine if low or high glucose is contributing to symptoms such as fainting and unconsciousness. If a patient has pre-diabetes (characterized by fasting or OGTT levels that are higher than normal but lower than those defined as diabetic), the doctor will order a glucose test at regular intervals to monitor the patient’s status.
*This information was extracted from an excellent website. http://labtestsonline.org. For further information, explore their website or speak to your physician.