What is the purpose of using a butterfly needle during blood collection?

The use of a butterfly needle during blood collection is particularly advantageous for ensuring a stable draw. Butterfly needles, also known as scalp vein sets, are designed with flexible wings that allow for easy maneuverability and stabilization when inserted into a vein. This stability is crucial, especially in smaller veins or in patients with difficult venous access.

The design of the butterfly needle allows for a more precise insertion, which helps maintain venous access without significant movement. This characteristic is especially beneficial when multiple samples are required or when drawing blood from patients with fragile veins or other complications. In such cases, maintaining a stable draw reduces the risk of hemolysis or sample contamination, which could compromise the quality of the specimens collected for testing.

While other factors such as minimizing discomfort might also be a consideration due to the design and small gauge of the needle, the primary purpose of a butterfly needle is its ability to provide a stable and controlled blood draw, particularly in challenging situations.