Standard or Food Bolus
Similar to the bolus calculator in your t:slimpump, to give a food bolus on the t:connect mobile app you enter either grams of carbs OR units of insulin (if you have Carbs off) into the Bolus Calculator. The example below goes through bolus delivery with grams of carb.
Food bolus with Grams of Carb
Enter the grams of carbohydrate you are going to eat. Next, tap the Glucose field to enter the current glucose value. (Note: If Control IQ technology is enabled, the glucose value may be prepopulated.) A glucose entry is notrequired for a food bolus to be calculated and delivered. The pump will calculate and recommend a correction bolus amount, if glucose entered is above or below target (wording: or “if needed”?). See the bottom of this article for more information about correction boluses via the mobile app.
Once you have entered the grams of carbohydrate and the current glucose value, tap Done to close the keypad. Closing the keypad updates the total bolus amount at the top of the screen.
Tap Next in the upper right corner of the t:connect mobile app.
The screen above appears where you review and confirm the amount of insulin to be delivered.
If you want to modify the entry, you can tap Back. If you are ready to continue, tap Confirm.
Tap Deliver Bolus.
You will then need to authenticate using whichever security feature you have enabled on your smartphone.
The t:connect mobile app returns to the dashboard. At the above the navigation bar, you will see a bar indicating that a Bolus was requested.
After 10 seconds, the bolus delivery begins. The bolus bar remains above the navigation bar for the duration of bolus delivery, even if you scroll to other parts of the dashboard or navigate to other screens.
Once the complete bolus has been delivered, you will see a droplet on the lower portion of the graph, showing you the amount of the bolus that was delivered. In addition, the Insulin on Board is updated.
Override Bolus via the Mobile App
There may be times that you want to adjust the amount of insulin that was calculated by the Bolus calculator.
You can tap the Units field at the top of the t:connect mobile app screen to manually enter a different amount of insulin to be delivered.
After you have changed the number of units of insulin, you will see this message on the app screen letting you know that you have entered an Override bolus. The Carbs and Glucose values that were entered will not be used to calculate the total bolus amount. Instead, the units of insulin you manually entered will be used.
When you want to give a Correction Bolus (for example, to correct high blood glucose outside of consuming food), tap the Glucose field and enter the current glucose value.
This field may be pre-populated based upon the automated insulin delivery feature on your pump.
After you enter the glucose value or it is auto-populated, the recommended correction bolus is shown at the top.
Above Target BG
When a value entered into the Glucose field in the bolus calculator is above the Target BG, you will get this prompt asking you if you want to add a Correction Bolus.
Depending upon the automated insulin delivery feature on your pump, the Glucose field may be pre-populated. In that case, if the current CGM reading is above the Target BG, this prompt would be displayed immediately after you tap the Bolus Icon on the Navigation bar.
When you confirm that you wish to add the Correction bolus, the above screen is displayed. In the Delivery Calculation, you see that insulin for the food bolus and the correction bolus will be added together. If IOB is present, it will only be subtracted from the calculation of the correction portion of the bolus. If you are still unsure if you want to add correction insulin to this bolus, you can toggle on/off the “correction bolus” toggle to see the bolus recommendation with and without the correction portion.
Below Target BG
If your glucose is between 70 mg/dL and Target BG, you will be given an option to reduce the food bolus to help you get back to your target.
If you tap Yes, the above prompt is displayed letting you know that your bolus will be reduced. In addition, if your IOB will cause your BG to drop low, you will see this additional information displayed.
Once you tap OK, you see that the Correction amount is shown in red in the Delivery Calculation.
If IOB is present, the bolus calculator will use it to reduce the food bolus amount. Note that the values shown in red with a subtraction symbol are the ones the calculator is subtracting from the food bolus amount.
If the glucose value is below 70 mg/dL, the food bolus will automatically be reduced to correct for the low blood glucose. You will see this prompt on the t:connect mobile app which states that you should eat carbs and test your blood glucose.