Phlebotomy is when someone uses a needle to take blood from a vein, usually in your arm. Also called a blood draw or venipuncture, it’s an important tool for diagnosing many medical conditions.

A butterfly needle is a device used to access a vein for drawing blood or giving medications. Some medical professionals call a butterfly needle a “winged infusion set” or a “scalp vein set.” The set ...

Phlebotomy refers to drawing blood from a person’s vein with a needle. Lab tests on blood samples are important as they measure different blood components and provide information that can lead to a ...