hi. I have a few questions. what happens if your iv pump hose runs dry will that bring air in your veins can this be bad or will it not effect anything and for how long. can a IV be hooked up with out the pump being on. I'm new in the Medications and doing some studies. any information on the Iv pump will be appreciated. if the bag runs dry how long will you have to replace it. is there any side effects to leavening the tube dry for a few days. thank you.