what is a butterfly needle
Identification. A butterfly needle is a short needle with a small diameter attached to a thin, flexible tube. The needle is flanked by two rubber wings that allow the phlebotomist to grip and move the needle with ease.The tube is attached to a rubber boot that attaches to the blood collection tube.isconceptions. Despite its small diameter and unimposing appearance, butterfly needles do not always result in less pain to the patient. Butterfly needles are short, and multiple sticks may be required to hit a vein. Blood clotting within the tube is possible, and if this occurs, a re-stick of the patient is necessary.