What blood collection method is primarily used for infants?

Capillary puncture is the primary blood collection method used for infants due to several factors. Infants have smaller blood volumes and their veins are more delicate, making venipuncture, which requires accessing larger veins, less practical and more challenging. Capillary puncture allows for a quick and minimally invasive method of obtaining blood, often performed on the heel or finger where sufficient capillary blood can be obtained with minimal discomfort to the child.

This method efficiently provides a reliable sample for testing while reducing the risk of complications associated with larger needle sticks, which can lead to hematoma, pain, or even infection. Additionally, it is easier to perform in infants compared to other methods, providing healthcare professionals with a safe and effective means of blood collection.