Intravenous Fluids are administered through thin, flexible plastic tubing called Infusion Tubing , or an Administration Set . The Infusion Tubing , or Administration Set , connects to the bag of IV Solution . Primary IV Tubing is either a Macro-Drip Solution Administration Set that delivers 10, 15, or 20 gtts/ml, or a Micro-Drip Set that delivers 60 drops/ml. Macro-Drip Sets are used for routine primary infusions. Micro-Drip IV Tubing is used mostly in pediatric or neonatal care, when small amounts of fluids are to be administered over a long period of time.