What are the collection devices typically used for skin punctures?

Capillary tubes are specifically designed for collecting blood from skin punctures, such as those performed on infants or for glucose testing. These tubes are narrow and allow for precise collection of small blood volumes, which is essential when only a small amount of blood is needed. They are often used in conjunction with a lancet to create a small puncture in the skin, allowing blood to flow into the tube through capillary action.

Syringes and vacutainer tubes are primarily used for venous blood draws, where a larger volume of blood is required. Syringes can be used for various types of fluid collection and may not be as efficient or suitable for small skin punctures. Vacutainer tubes are specifically designed to be filled by direct venipuncture and require a larger volume than what is typically gathered through a skin puncture. Butterfly needles are valuable for accessing veins, especially in smaller or more difficult veins, but they are not used for skin punctures. Thus, capillary tubes are the most appropriate and effective choice for this type of blood collection.