Final answer:
In a capillary blood glucose test, the first drop of blood is wiped away to avoid tissue fluid contamination and ensure accurate results.
Step-by-step explanation:
When performing a capillary blood glucose test, it is a common practice to wipe away the first drop of blood. This is done because the first drop may contain tissue fluid, which can dilute the blood and potentially lead to inaccurate results. After wiping away the first drop with a sterile gauze, a new drop of blood can be obtained for testing. It is important to employ proper technique to ensure that the test results are as accurate as possible, as they are crucial for managing conditions such as diabetes.