Quote from HamsterRN
The reason why I ask this is that the Infusion Nursing Society divides tubing into three categories: Primary continuous, secondary continuous, and primary intermittent. The common wisdom seems to be that secondary tubing refers to the shorter length of tubing used connect a bag to the port of a primary line above the pump, for the purpose of running an intermittent infusion. Since all intermittent infusions should use a secondary set-up, why is there no "secondary intermittent" option? Aren't "Primary" and "Continuous" synonymous, as well as "secondary" and "intermittent"? What would be an example of a primary intermittent?
An example of a Primary Intermittent Set is one where you have primary tubing attached to an IVAB like Ancef and you are giving that Ancef q 8hrs. Without a mainline (500cc-1000cc) of IVF, all you have is the 50-100cc minibag and the primary tubing. You connect the minbag to the primary set, purge the tubing and hook up to pump, or count the drops after you hook up to the pt's IV line. Once the med infuses over 30 minutes, you dissconnect and place a sterile end cap onto the tubing's end and then that tubing is ready for the next dose 7.5 hours later.
That is a primary intermittent. Because you are connecting/disconnecting throughout the day, and you have the increase in manipulations, you change the tubing daily, or in this case, after each third dose infuses.
So, in essence, if you dose 6a,2p,10p, a new tubing would be hung with the start of each new day for the 0600 dose.
All minbags, like IVAB, do not have to have a primary set with a mainline of saline or D5W unless you work for an institution which requires that it be given in this manner.
Sometimes it will be required because the pump that is being used, requires tubing which contains 25-30 cc of fluid to prime. In this case, I would use a "mainline" in order to use a secondary set to give my IVAB. If it wasn't done in this fashion, 1/2 to 1/3 of a small minibag could be left inside the IV tubing.
Hope this helps.