This may be a very silly question, but other than with glass bottles, what is the purpose of using air vents on IV tubing? Should I keep them open or closed? They are on our primary and secondary tubing sets.
Yes that is it...you open the vent if you need an air source to displace the IV fluid. If you do need an air source and do not open the vent the IVFs will continue to drip for awhile and then STOP and then you will see the drip chamber suck in on the tubing suck in. I see this happen when nurses forget to vent Albumin and Lipids and such. If you do not need the vent keep it closed. If you need the vent and it open and you see the tubing and/or dip chamber sucking in and you flow slows or lessons then the air vent is not working very well or at all. If the set has been primed incorrectly this can happen and the vent gets wet or the IV medication is very viscous.