Hi
This is my first post on here
I have a son (now 14) who has had Type 1 for 3 years and is on an Animas 2020 Insulin Pump.
Firstly, I would never repeat a test on the same sample of blood, as I don't think it has any validity. If we get a low on a meter, we always treat for a hypo - as sometimes it takes a while for the brain to react to the low glucose and show outward signs of a hypo. Your lad may not yet be able to tell very easily for himself when he is going low, but hopefully he will recognise the early symptoms as time goes on. My own son usually notices that something is amiss once he drops below about 3.5mmol - but at that stage I wouldn't notice any difference in him. Sometimes his hands shake a little as we do the test.
We do quite often do a repeat test if a result is high - particularly if we are not expecting it. Then we would wash hands and repeat using a fresh drop of blood - just to make sure before we give extra insulin that the BG test is genuine!
Meters do have variable results even on two samples taken within a minute or two, but there is much greater variation at high levels and usually very little at low levels.
Another point. Having treated a hypo with some fast-acting carbs, we find its best to wait until the blood sugars are back in range (and re-test) before eating other food such as a meal which is due, or a snack. This is because we find that the other food slows down the action of the hypo treatment (the fast carbs) which are much more quickly absorbed if there isn't other food arriving straight away. For us, we need to allow a good 15 mins after the last hypo treatment, before eating other starchy carbs. It can be tricky making them wait, as the hypo is likely to make them feel ravenous.
Well done for dealing with the hypos though!