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Copy file name to clipboardExpand all lines: docs/operation/algorithm/bolus.md
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These recommendations are not proactively sent to the *Loop* user through any notification or banner alert; the recommendation is only viewable when the user clicks on the bolus tool. Note that *Loop* never issues a bolus command automatically while using the default Temp Basal Only [Dosing Strategy](../../loop-3/settings.md#dosing-strategy); all boluses are initiated by the user unless the [Automatic Bolus](../../loop-3/settings.md#automatic-bolus) dosing strategy is enabled. With automatic bolus enabled, each automatic bolus is limited to 40% of the recommended amount or the maximum bolus setting, whichever is smaller.
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The recommended bolus calculation is described in [Determine the Recommended Dose](temp-basal.md#determine-the-recommended-bolus){: target="_blank" }, with these exceptions:
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The recommended bolus calculation is described in [Determine the Recommended Dose](auto-adjust.md#determine-the-recommended-bolus){: target="_blank" }, with these exceptions:
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* the insulin contribution from the currently running temporary basal set by *Loop* is removed or subtracted from the recommended bolus amount, and
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* the delta is calculated for the top of the correction range, rather than the average of the correction range.
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* As time progresses after the meal, when appropriate, *Loop* modifies insulin delivery
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* A decrease in recommended insulin amount is always provided as a decreased Temporary Basal rate
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* An increase in recommended insulin amount is delivered based on the user-selected [Dosing Strategy](../../loop-3/settings.md#dosing-strategy){: target="_blank" }:
* In effect, this algorithm behavior mimics traditional pump therapy of “extended” or “dual wave” bolusing, but with the benefit of added information about actual carbohydrate absorption effects as time goes by
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Copy file name to clipboardExpand all lines: docs/operation/algorithm/overview.md
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## The *Loop* Algorithm
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Loop’s algorithm for adjusting insulin delivery is oriented around making a glucose prediction and modifying delivery to bring that prediction within target range without going below the Glucose Safety Limit. Every five minutes, triggered by new glucose data, it generates a new prediction. Both [bolus recommendations](bolus.md) and [temporary basal rate adjustments](temp-basal.md) are set based on this [prediction](prediction.md).
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Loop’s algorithm for adjusting insulin delivery is oriented around making a glucose prediction and modifying delivery to bring that prediction within target range without going below the Glucose Safety Limit. Every five minutes, triggered by new glucose data, it generates a new prediction. Both [bolus recommendations](bolus.md) and [temporary basal rate adjustments](auto-adjust.md) are set based on this [prediction](prediction.md).
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!!! abstract "Glucose Prediction"
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The *prediction* is a calculation based on the known parameters of current and historical glucose values, current and historical insulin delivery using any entered carbs. Loop's model predictive control (MPC) calculation includes the user's therapy settings modified by active overrides. This calculation is updated at the next glucose reading and the recommended insulin delivery may be updated.
Note that the [Momemtum](#blood-glucose-momentum-effect) term does not just add to the other effects as implied in the simple formula above; it is blended with the other terms as described in more detail in the [Momemtum](#blood-glucose-momentum-effect) section below).
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Note that the [Momemtum](#glucose-momentum-effect) term does not just add to the other effects as implied in the simple formula above; it is blended with the other terms as described in more detail in the [Momemtum](#glucose-momentum-effect) section below).
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You can see the individual contributions of these effects by tapping on the glucose chart on Loop's main screen to view the [Predicted Glucose Chart](loop-3/displays-v3.md#predicted-glucose-chart){: target="_blank" }. *Loop* updates this glucose prediction every five minutes when a new CGM value has been received and the pump's status has been updated.
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