#1- As long as your not needing to infuse that blood in a short time frame, you can infuse it via a 22g 1" IV catheter over a three to four hour time frame. Then, that same line can be used to administer plts or albumin after line flushing. And, as long as that line is still patent, an IVIG infusion can be given after that. Running Blood and Plts at the same time into different lines can create a fluid overload problem for some (the very old and very young are most susceptible).
#2 - If a medication was such that it could not be discontinued - ie Heparin gtt - then a second line should be placed to infuse the blood. If however, it is a maintenance fluid that can be stopped, stop it, disconnect the maintenance fluid and place a sterile end cap onto its tip, flush the line and then connect the IV catheter to your preprimed NS "Y" set and blood component.
#3 - NS should be the only carrier to be used with blood. No other medication or solution is appropriate. (Dedicated line)
In addition, there may be no right or wrong re. the primary or secondary scenario. Can a Heparin gtt infuse by itself without a mainline? Of course it can. If however, a heparin gtt is ordered as well as a liter of saline at its own rate, your main concern is compatibility. Then, do you have a pump that will allow you to infuse two medications simultaneously, or does one medication stop while the other infuses? If compatibility is not an issue, and your pump is a dual chamber (or allows for multiple infusions) they can both infuse at the same time.
Can that IV catheter accept the flow rate of both infusions together? The answer to that is usually yes... A 22g IV catheter can handle a flow rate of approx. 2L an hour (35mls/min)
As far as the slip-lock, or non-leur-lock ext set goes.. Don't use it!
Yes, you always want an ext set on your IV catheters, but they need to be leur-lock in nature. ie. they need to be the kind that has a male fitting, which then goes into the female and screws into place.
Hope this helps..DD