I know its technically possible to infuse through a butterfly needle in some situations, but thats definitely not the standard practice. Butterfly needles are primarily used for short term access, Blood Specimen Collection in Simple Steps , 1. Gather all necessary supplies., 2. Prepare your setup and attach the vacutainer to the butterfly needle., 3. Secure the tourniquet., 4. Palpate the Mastering self infusion Haemnet Butterfly Blood Draw Step by Step Guide