Oh wow, Cint -- blood glucose in the 200's!! A seizure (or any other stress to the body) can increase blood sugar levels, but it wouldn't put it that high! (or maybe it would, because of the additional stress of the accident?) Maybe you had a spike for some other reason before the seizure (which triggered the seizure)?
The more research I do, the more I see a link between blood sugar spikes and crashes (too high or too low) and seizures. Before Jon started the Ketogenic diet (you have to go on a waiting list to get admitted for the start up -- so that's usually 2 or 3 months) -- his nutritionist advised that we go ahead and cut sugar out of his diet and reduce carbs -- and we really did see a great improvement with just doing that -- and he wasn't getting that much sugar to begin with -- I never gave him stuff like Koolaid and he didn't eat candy or many other sweets. But, we substituted his kid's yogurt (with the fruit and added sugar, it's pretty high in carbs) with plain, high fat yogurt (which he liked just as well), and changed out his sweetened breakfast cereal with eggs. For lunch, he'd get a low carb wrap instead of a sandwich with 2 pieces of bread...that sort of thing. Anyway, we did see a big improvement. Then, one day we were at a BBQ joint with limited options -- and he had some BBQ chicken and baked beans -- and after eating that he had 3 seizures. I didn't realize that BBQ sauce is loaded with sugar, as is baked beans.
Now, of course, on the Ketogenic diet, he gets almost no carbs at all, because the point of the diet is to change the fuel for the brain, thus changing the chemistry. But even with reducing his glycemic load prior to the diet, we saw a lot of reduction in seizures. A reduced glycemic load is a healthy way of eating for anybody. I shoot for around 150 a day, and any grains have to be whole grains (this slows absorbtion -- and also provides good fiber and nutrition).