I agree with most of what's been said. I've been a type 1 diabetic for almost 20 yrs and was diagnosed when I was 10.
I know you say your son has only been diagnosed for a week but I find it completely shocking that you were sent home without at least a diabetic nurses number. In the past 20yrs I have ALWAYS had a number of a nurse. I have probably never actually used it-but this is exactly the reason they are supposed to be there. Please bring this up when you do get through to someone x x
A blood sugar of 30 IS something to be worried about. It is true that the odd high reading will not do your son any harm and type 1's do (quite often) get high readings. A reading that high would make me feel absolutely awful. You are doing the right thing testing for ketones and giving your son (bucket loads) of water.
Lantus as has already been said, is a long acting insulin. I can tell from your posts that it isnot the correct dose/or even insulin for your son, regardless of his illness. It is supposed to have a 24 hr action, and I am guessing he takes his injection before bed. The reason your son is getting such high readings (apart from the illness) is the fact the lantus is running out towards the end of the day. This is a very common problem which again your doctors can help with.
Lantus is not supposed to help correct a high reading. This insulin is taken to keep blood sugars within range throughout the day if your son didn't eat anything. Apidra, as you know, is short acting. In fact it is A very new insulin and is VERY short acting. The best thing about it is that it is out of the system after about 2-21/2 hours. This is used to cover your sons meals. It is also the insulin he needs to inject if he needs to correct a high reading. How much does he roughly take with each meal? They (I hope!) will teach you and your son how to count carbs and calculate how much apidra to take and also a correction dose. For example, every unit of short acting insulin brings me down by 2.5mmols, so in my case I would need about 8 units to correct a reading of 30. (your son will have his own correction ratio and I'd guess it will be lower than this).
Personally (shoot me other mners) I would give your son an apidra shot if he gets a reading of 30 again. The poor mite will be feeling so poorly (in 20 yrs I have only ever had a handful of readings like that). I would give him just 1 unit of apidra and test his sugar every 20 mins for the 2 hours it'll be working for. This way you can SAFELY see how it is affecting him. If it drops below 5 in this time, or if it drops into single figures within an hour, correct his low by giving dextrose. I can promise you that if you test every 20 mins you will catch it. (I can also say that with a reading that high, the chances of your son going low on 1 unit are 0). He will probably need more than a unit but least you'll take the edge off the high.
Good luck! Type 1 is perfectly manageable-for me it's normal. I have just had a beautiful baby girl. Your son will adjust. There are some great websites out there thatcan help. Diabetes.co.uk and diabetes-support.org.uk are my favourite and full of helpful people. If you need anymore help please ask x x x