Carbs Insuline Ratio and Insuline Sensitivity Factor

By Mahmud78 Latest Reply 2011-02-15 13:40:28 -0600
Started 2011-02-14 12:17:41 -0600

Hi Family
my Carbs Ratio is 1/15 and My ISF is 25 how can i corelate these two factor for example if i want to eat 15 grms of Carbs i need one unit if insuline but on the other hand it will reduce my BS 25 Points down because MY ISF is 25 how can i corelate theses factors please any can guide me thanks

4 replies

kdroberts 2011-02-15 13:40:28 -0600 Report

Well, getting your carb ratio and insulin sensitivity are not as easy as using a simple formula, you may need to tweak them somewhat based on results.

Secondly, I:C ratio and insulin sensitivity factor are completely different and even though can be combined you should think of them as unrelated. The I:C ratio is purely for covering carbs when eating.

So in your example of 1:15. If you test before eating and are at 100, if you eat 30g of carb and inject 2 units of insulin then you should (theoretically) end up at 100.

For the insulin sensitivity factor, if you tested your blood sugar and it was 200 and you want to get it to 100, you would inject 4 units and that should do the job.

You can also combine them. Say you were at 200 and eating 30g of carb and want to end up at 100. You would take 2 units to cover the carb you are eating and then an additional 4 units to get down to 100 for a total of 6 units.

It's not an exact science but it works roughly like that.

Mahmud78 2011-02-15 13:23:42 -0600 Report

Hi Richard thanks for your Reply but still confuse as i have calculated my Carb ratio 500\ toltal units of my Actrapid daily uses which is 22 units morning and 16 units evening total 38 so it is 13.15 so my carb ratio would be 1/13.15 it means if i take 13 grm of carbs i need 1 unit of actrapid or i have to check that how much BS rais after taking 13 grm of carbs suppose if it goes 30 points then how much units i need to settle down is it one unit ?

Richard157 2011-02-14 18:52:40 -0600 Report

That is not the way it works. The one unit of insulin would compensate for how much the 15 carbs would raise your blood sugar. If your 1/15 carb ratio is correct, then your blood sugar would be just fine. If you had taken 2 units, then one of them would have dealt with the carbs, and the extra unit would lower your blood sugar 25 points. You can use your carb ratio with the carb counting procedure and not have to worry about going too low. If you do go too low, then your ratio needs to be changed.

My ratios and ISFs vary during the day. They may vary for you too.

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