When collecting blood from infants, what is the preferred method?

The preferred method for collecting blood from infants is heel stick or capillary sampling to prevent trauma. This technique is specifically designed to minimize the risk of injury to a young, fragile patient. Infants have smaller veins, making traditional venipuncture more difficult and potentially harmful due to the risk of complications such as excessive bruising or even the possibility of hitting deeper structures.

Heel sticks target the soft tissue of the heel, which is not only less invasive but also allows for the collection of small blood volumes needed for various tests. This method is generally safe, quick, and causes minimal discomfort, making it ideal for neonates and infants who are particularly sensitive.

Using venipuncture, while it can provide accurate results, carries a higher risk of trauma and stress for the infant. A finger stick is less commonly used in infants due to their small fingers, and arterial puncture is invasive and typically not necessary for most blood tests in this age group. Therefore, heel stick or capillary sampling strikes the best balance between safety and the need for accurate laboratory data in infants.