Which blood collection technique is used for obtaining multiple samples from a single site?

The butterfly method is particularly effective for obtaining multiple blood samples from a single site due to its design. This technique utilizes a specialized winged infusion set that allows for better maneuverability and control during the collection process. The wings provide stability when handling the needle, making it easier to insert and hold at the venipuncture site.

This method is especially useful in situations where multiple draws are needed, such as in pediatric patients or those with small veins, as it minimizes trauma to the vessel. The ability to attach various collection tubes directly to the butterfly's hub allows for efficient switching between samples without needing to remove the entire device from the puncture site, reducing the risk of hematoma formation and discomfort for the patient.

Capillary puncture, while useful for small volume collections or when venipuncture is not feasible, typically yields only a single sample and is not suitable for obtaining multiple tubes of blood. Venipuncture can be used to draw from a larger vein but does not inherently offer the advantages of the butterfly method for multiple samples in a single insertion. Random sampling does not specify a technique and generally refers to the practice of taking samples without a standardized protocol, making it less relevant in the context of obtaining multiple samples efficiently.