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Hybrid Closed Loop System
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Why
the self-driving car?
Well, we do have a technology today
that can provide some automation, and the way the user needs to interact
with it is similar to how self-driving cars require some input from the
driver. These automated insulin delivery systems are called a closed loop systems
or HCLs.
HCLs automate some, but not all, aspects of insulin delivery. The
remainder is the responsibility of the user.
And in
many ways, HCLs are like driver-assistance technologies that tell a
driver when they are veering out of their lane or getting too close to
the car in front of them. This technology can make it much safer to
drive, but by no means does it mean that the driver can fall asleep at
the wheel. The driver is required to provide input when certain
conditions apply, or when changing the systems parameters. |
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Semi-automated
insulin delivery
Makes
some adjustments on its own
Provides
information so the wearer can make other
adjustments
Achieves
more stable blood glucose levels |
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Assistive
Technology
Different
HCL systems assist the user in regulating specific aspects of their glucose
control. Some will turn off a pump’s insulin delivery when glucose levels are
low. This helps to shorten the time for recovery. And in the event the victim
is unconscious or unable to self-treat, turning off the pump’s insulin delivery
will allow the blood sugar to rise on its own toward a safe level within a few
hours. The Medtronic 630G and 670G offer this feature.
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Some devices can turn off insulin delivery if needed
This built-in safety feature can help some wearers
achieve stable BG in emergency situations
Offered on:
Medtronic 630G
Medtronic 670G
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Additional
Functionality - Reduce Basal Insulin Delivery
Some will
turn off or reduce basal insulin delivery when a low is expected. This reduces
the risk of hypoglycemia and lessens the duration and severity of the low. The
algorithm automatically resumes basal insulin delivery when glucose levels
return to a safe level. The Medtronic 670G, Tandem with Basal IQ, and
do-it-yourself HCL systems such as Loop, Open APS and Android APS offer this
feature.
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Some systems can reduce basal insulin delivery
The algorithm automatically resumes basal insulin
delivery when safe
Medtronic 670G
Tandem with Basal IQ
DIY HCL systems
Open APS
Android APS
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Increased Basal Insulin Delivery
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Some systems can reduce basal insulin delivery when glucose levels are predicted to be
higher than the specified limit
Medtronic 670G
Tandem with Basal IQ
DIY HCL systems
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Correction Boluses
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A few systems can deliver
automated correction boluses when BG levels are expected to be high
Tandem with Basal IQ
DIY HCL systems
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Instructions
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