This is where the very early cycle spot checks (those +1's, +2's) and those very late cycle spot checks (the +10's, +11's) come into play. Call them the "neglected" spot checks. Everyone gets those +6 spot checks, but there is a reason to collect data in the very early and very late part of the cycle.
Say you get a preshot of 150. Well if you've collected the data on the average time it takes the insulin to start having any effect for your cat and what happens after +12, then you might see that shooting a 150 is actually very safe in your cat. Kitty will be in the 200's before the insulin starts working. You are then using the lag time (aka overlap and carryover) between shooting and effect time to your advantage.
So why the +10's and +11's? Well say you are on day 5 of a dose increase change and your storage shed is now not only full, it is overflowing... and your +10 or +11 was way higher than your preshot. Good way to stay out of trouble cause now you know you would have shot a still dropping number, not a good idea. so what is the plan then?.... keep testing, and not 2 hours later, every 20-30 minutes would be better, so you can catch the minute it turns and do not loose all your overlap. If you miss the rise and cat is way up there BG wise before you shoot, remember the number is just going to continue to rise in those hours before the insulin has a chance to kick in, and you have a roller coaster curve going rather than the flat curve that is ideal.
