Scalp vein sets are also known as winged infusion sets. They are also known as butterfly sets due to their shape. They are meant to be used for venipuncture. Venipuncture is a process in which intravenous access is obtained for the administration of intravenous therapy or for the collection of venous blood. Venipuncture is also known as phlebotomy. A scalp vein set consists of the following components: