Capillary blood collection is a method used to obtain small samples of blood, typically from a fingertip or heel. This technique is often employed for quick tests, such as measuring blood glucose levels or conducting newborn screenings. The process involves using a small lancet to puncture the skin, allowing blood to flow into a collection device. This method is preferred in certain situations because it is less invasive than venipuncture, which involves drawing blood from a vein. Capillary blood collection is particularly useful for patients who require frequent testing, such as those with diabetes or infants needing routine health assessments.