Test your Blood Sugar to Insulin ratio on a day which follows a vanilla day. That is, the previous day should have no insulin reactions, unusual highs or lows, or out of the ordinary physical activity.
Prior to and during the testing period, you should not participate in any activites which are out of the ordinary. Do the things you normally do every day.
In order for this procedure to work correctly, blood sugar levels must remain stable and constant during the test period.
The Blood Sugar to Insulin ratio measurement should be repeated two or more times on different days to make sure the results are accurate and repeatable. Make changes to basal rates and boluses only after successfully repeating the test results. It can be expected that there will be some minor variation in readings from day to day. Repeatable test results indicate a true pattern which can then be used to maintain correct blood sugar levels.
Measure your BG/I ratio by checking your body's response to a bolus. If you are comfortable with a one unit bolus when at 150 then the following procedure will give you a good idea of the blood sugar drop caused by a unit of insulin. The one unit bolus is intended to move your blood sugar levels down by 60 to 75 points. Use a smaller or larger bolus to achieve this target range and calculate the BG/I ratio after completing the test period. CONSULT your health care advisors if you are uncertain about this procedure, do not proceed.
This test could be performed using Regular insulin, however, the wait period would be 4 1/2 to 5 hours rather than 2 - 3 with Humalog.