Final answer:
A Butterfly needle, or Winged Infusion System, is a device used for drawing blood or administering IV therapy, noted for its flexible 'wings' that provide stability and ease of insertion.
Step-by-step explanation:
A Butterfly needle, also known as a Winged Infusion System, is a medical device used to access a vein for drawing blood or for IV (intravenous) therapy. Unlike regular needles, a butterfly needle consists of a short needle with two soft, flexible 'wings' that allow for better control and stability during insertion. The 'wings' also help in securing the needle in place once inserted into the patient's vein. The versatility of the butterfly needle makes it particularly useful in patients with difficult venous access or for those who require a more gentle approach, such as pediatric or elderly patients.
Butterfly needles are available in various gauge sizes typically ranging from 18 to 27, where a higher gauge number indicates a smaller diameter needle. The choice of size depends on the purpose of the infusion and the patient's vein size and condition. Thanks to their user-friendly design, butterfly needles are an essential tool in medical settings for efficient and effective venipuncture and intravenous therapy.