What is the purpose of using a butterfly needle?

The purpose of using a butterfly needle primarily lies in its design, which is particularly suited for pediatrics and difficult venipuncture situations. The butterfly needle, also known as a winged infusion set, is characterized by its two "wings" that allow for better control and stabilization during insertion. This makes it ideal for individuals, such as children, who may have smaller or more fragile veins that require a gentler touch when collecting blood.

In challenging venipuncture situations, such as when veins are difficult to locate or access due to certain medical conditions or patient anxiety, the butterfly needle allows for a more precise insertion. Its smaller gauge and flexibility enable healthcare professionals to navigate tricky vascular anatomy effectively. The design also reduces the risk of vein collapse, ensuring a smoother collection process, which is especially critical in delicate populations like pediatric patients.

While the other choices mention uses such as general blood collection in adults or arterial blood collection, they do not align with the specific advantages offered by the butterfly needle, which focuses on the safety and efficacy of accessing smaller or more challenging veins.