Take a look at the image below and see if you can spot the differences between these two IV giving sets:
Maybe the packaging will help?
How did you go? There are actually a few differences between them, but there is one in particular that I am interested in, and you should be too. Can you guess which one it is? Yes, that little white bit circled in red is what’s called a “one-way”, “back check” or just “check” valve. As the name suggests it ensures fluid in the line can only move one-way i.e. from the IV fluid bag and into the patient. This valve is there so that if you are running a secondary infusion it will flow into the patient, rather than back up the primary line and into the fluid bag. A visual representation of what this valve does can be seen in this video: