At midnight, I went to bed at 130 and took a 1 unit correction of Apidra along with 6 units of Levemir. At 1:17am I was 107, and at 2am I was 94. I typically check 2 hours after a correction to make sure it brought me down enough, and last night it did. I went to sleep until about 4:45am, and checked my Dex to see that he was telling me I was low. I checked and it said 58. I hopped out of bed, grabbed the bag of Dextrose and a measuring spoon, and figured out how much I needed to eat.
|Graph from Dr. Bernstein's Diabetes Solution book|
On the bag of dextrose, it told me that 1 tsp = 3g carbs
Since 1g raises my blood sugar by 5mg/dl, that means 3g raises my blood sugar by 15 mg/dl. I figured that in order to go up to the 80s (30 points) I needed to eat 6g, or 2 tsp. I waited and tested again at 5:09am and 5:24am. I was 74, then 80. So that tells me that my blood sugar rose by 22 points in 36 minutes. I went back to sleep and woke up at 8am for my Levemir shot. I was 92. (I took 5 units this time, as I figure the extra unit at midnight might've been responsible for the low.) As the graph shows, my number went up and stayed steady after I treated my low.
If you know how much a single gram of carbohydrate affects you and you don't have a ton of insulin in your system, you can accurately treat lows without rebounding into the 200-300s or higher. Low carb makes this possible. The Law of Small Numbers rules. Fewer carbs = less insulin = smaller mistakes. It's just common sense.