American Medical Certification Association (AMCA) Phlebotomy Practice Exam

The accuracy of blood glucose levels can be significantly influenced by medication, food intake, and the timing of the test. When assessing glucose levels, it is essential to consider recent food consumption because carbohydrates can dramatically elevate blood glucose levels shortly after ingestion. Additionally, various medications, such as corticosteroids or insulin, can either raise or lower glucose levels depending on their action. The timing of the test is also critical; for example, fasting blood glucose measurements taken after a period of no food intake will yield different results than those taken after eating.

In contrast, while environmental temperature, blood type, and a patient's age can have some influence on other physiological measurements, they are not primary factors that directly affect blood glucose accuracy. Environmental temperature might affect blood sample integrity, but it does not impact the biochemical results in a significant manner like medication and food intake do. Blood type does not influence glucose measurements, and while age can affect metabolism and overall health, it is less impactful on immediate glucose level readings compared to the other factors mentioned. Therefore, understanding the impact of medications, food, and timing is crucial for accurate blood glucose monitoring.