Pump therapy: dose adjustment

  • Dose adjustment when using an insulin pump: 

    Our goal is to help you learn to make rate and ratio adjustments independently

    Insulin requirements regularly change. To achieve a target HbA1c (measure of complications risk) it is important to change pump settings when BGLs show a pattern outside the target range. If you have made setting changes and your BGLs are still outside target range, you can phone or email the DNE team during office hours for advice

    YOUR BGL TARGET is 4.0 mmol/L- 7.0mmol/L.

    YOUR HbA1c TARGET is less than 53 mmol/mol (less than 7.0%)

    Link instructions to upload your insulin pump: 

    Medtronic CareLink

    Tandem T:Slim: Diasend 

    Pump terms reference guide: 

    Bolus Insulin:

    Carbohydrate Bolus; insulin to carbohydrate ratio (ICR):

    Insulin delivered following entry of carbohydrate to be consumed

    Correction Bolus; Insulin sensitivity factor (ISF)/ Correction Factor (CF ):

    Insulin delivered to correct an above pump target BGL

    Basal insulin:

    Background insulin delivered continuously

    Review of your pump upload:

    • Look on the download for patterns in your BGL over a minimum of 3 days (except on sick days). Do not adjust settings based on only one or two readings.
    • BGLs out of target range 3 days in a row or 4 times in one week at the same time of day indicate that a change should be considered.
    • Wait 3 days to assess the effect of any adjustment before making another change
    • Aim for no more than 5 different basal rate settings
    • Aim for no more than 3 different Insulin to ICR and ISF/CF

    Hyperglycaemia (High blood glucose levels) 

    Should you adjust the basal rate or bolus insulin?

    • If BGLs are elevated overnight or more than 4 hours after food, the basal rate is likely to need changing. Consider increasing the basal rate by 10%, starting at least 2 hours before the rise.
    • If BGLs are high 3 hours after a meal bolus, the ICR is likely to need a change. Consider lowering the ICR ratio by 5%-10%. (E.g. Change 10 grams/unit to 9 or 9.5 grams/unit).
    • If BGLs are high 3 hrs after correction (and no food bolus has been given) the ISF/CF is likely to need changing. Consider lowering the ISF/CF by 5%-10%.

    Hypoglycaemia (Low blood glucose levels)

    Should you adjust the basal rate or bolus insulin?

    • If BGLs are low overnight or more than 4 hours after food, the basal rate is likely to need changing. Consider reducing the basal rate by 10% starting at least 2 hours before the rise. (E.g. 0.5 unit/hr to 0.45 units /hr)
    • If BGLs are low 3 hours after a meal bolus, the ICR is likely to need changing. Consider increasing the ICR ratio by 5%-10%.
    • If BGLs are low 3 hrs after correction (and no food bolus has been given) the ISF/CF is likely to need changing. Consider increasing the ISF/CF by 5%-10%.

    THIS ADVICE DOES NOT APPLY IF YOUR CHILD IS ON SICK DAY MANAGEMENT - Click here for sick day support for pump therapy