During an IV therapy session: Preparation: The healthcare provider will clean the injection site, usually on the arm or hand. Insertion: A needle attached to a small tube (catheter) is inserted into a vein. The needle is then removed, leaving the catheter in place. Administration: The IV fluid is connected to the catheter, and the flow rate is set. The fluid will drip slowly into your vein. Monitoring: The healthcare provider will monitor you throughout the session to ensure everything is progressing smoothly.