Sensor-augmented insulin pumps (SAPs) areinsulin pumpscapable of talking to continuous glucose monitoring systems (CGMs).
As an “open-loop” system, SAPs still require manual adjustments and inputs from the wearer.
This added up to a lot of painful finger sticks.
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Most pumps feature plastic tubing that connects to an insulin reservoir clipped onto your clothing.
All insulin pumps provide a continuous flow of short-acting insulin, known as a basal rate.
With a standard pump, these rates are fixed and oblivious to real-time changes in blood sugar levels.
This means your pump can automatically suspend your basal rate when your blood sugar levels are dropping.
This reduces the risk of severe hypoglycemic episodes.
Newer SAPs, includingMinimed 770G and 630Gand theTandem t:slim X2, are known as hybrid closed-loop systems.
These systems are not completely closed-loop because they still require input from the user.
The Minimed 780G has meal detection technology that can automatically give correction boluses of insulin for meals.
Talk to your healthcare provider about your insulin sensitivity factor and your insulin to carb ratio.
The first is with a temporary basal increase.
The second method is through an automatic bolus.
Most hybrid closed-loop systems also have the option for you to manually increase or decrease the basal rate temporarily.
For instance, you may want to reduce your basal rate by 50% when you are exercising.
Bolus Calculator
SAPs are also capable of delivering a larger amount of insulin before meals.
Your personal insulin to carb ratio should be customized and set by your healthcare provider.
Based on your parameters and your current blood sugar level, SAPs will recommend a bolus amount.
All you have to do is ensure you accurately count how manycarbohydratesyou plan to eat.
You enter the carb amount into your pump and then choose whether to accept and deliver the recommended bolus.
Side Effects
As with all forms of insulin therapy, SAPs come with the risk ofhypoglycemia.
Fortunately, there is evidence suggesting that SAPs cause fewer episodes of hypoglycemia than multiple daily injections.
Contact your insurance company to find out what your particular plan covers.
Many companies require a prior authorization form from your healthcare provider before they will approve coverage.
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2017;19(10):1485-1489. doi:10.1111/dom.12956
