NHA Phlebotomy Certification Practice Exam

Which of the following is primarily used for blood glucose testing?

1. Capillary blood

2. Venous blood

3. Arterial blood

4. Mixed venous blood

The correct answer is: Capillary blood

Capillary blood is primarily used for blood glucose testing because it provides a quick and convenient method for obtaining blood samples. This type of blood is typically collected through a finger prick, which allows for immediate testing using portable glucose meters. Capillary blood generally reflects the current glucose levels in the body efficiently, making it ideal for monitoring blood sugar levels, especially in patients with diabetes. Venous blood, while also used for glucose testing, is less practical for quick measurements, as it typically requires a venipuncture and laboratory processing for accurate results. Arterial blood is mainly used in advanced assessments, such as measuring blood gases, and is not a routine method for glucose testing. Mixed venous blood is even less commonly used and doesn't provide the immediate insight needed for daily glucose management. Therefore, capillary blood remains the preferred choice for glucose monitoring due to its ease of collection and timely analysis.