IV medication administration is delegated to registered nurses in most medical settings. Paramedics, LPNs, and IV team technicians who have received special IV training may give certain medications IV according to the policies of some medical settings. Patients and their families can be trained to use IV therapy pumps that automatically deliver IV medications in the home setting. IV nurses visit the home daily or every few days to change the medication cartridge and check the status of the IV line. The settings for the IV pump delivering IV medications are usually locked so that they cannot be accidentally altered. Patients are taught the signs of complications and learn to trouble-shoot IV alarms. IV nurses remain on-call to assist the patient and the family 24 hours a day when problems arise.