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Medtronic pumps and 'factory set' BSL range

tim2000s said:
It's well below the average glucose level required to achieve an Hba1C of 6.5%, (typically, average glucose of 6.5 will give you an Hba1C of 5.7%) and given that in general, 92% of the T1 population of most countries is above 6.5%, I think it's a perfectly reasonable number to aim for.
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I can appreciate that. But if it’s basically a closed loop system, I’d expect normal glucose levels to at least be the target, even if that’s not always achieved.
 
Mel dCP said:
I can appreciate that. But if it’s basically a closed loop system, I’d expect normal glucose levels to at least be the target, even if that’s not always achieved.
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The difficulty for the medtech companies is that they get sued if things go wrong, and given the limitations of current insulins (mainly slow clearance) it's understandable why they'd make that the target for clinical trials. In addition, you also have the risk of CGM values being wrong (and believe me over the last 12 months I've tested this fairly extensively - a fair amount of time CGMs overstate glucose levels by up to 1 mmol/l at "normal numbers", which on a target value of 5 or below leaves very little room for manoeuvre).

The other factor is that there is still bolusing required for meals, with manual involvement, and until you have an automated way to effectively counter too much insulin, other than suspending it, you can understand the reticence to push the target lower and lower. That's why the reality is that we're nowhere near fully closed loop systems and the Medtronic 670G shouldn't be thought of as anything other than a Hybrid System.
 
tim2000s said:
The difficulty for the medtech companies is that they get sued if things go wrong, and given the limitations of current insulins (mainly slow clearance) it's understandable why they'd make that the target for clinical trials. In addition, you also have the risk of CGM values being wrong (and believe me over the last 12 months I've tested this fairly extensively - a fair amount of time CGMs overstate glucose levels by up to 1 mmol/l at "normal numbers", which on a target value of 5 or below leaves very little room for manoeuvre).

The other factor is that there is still bolusing required for meals, with manual involvement, and until you have an automated way to effectively counter too much insulin, other than suspending it, you can understand the reticence to push the target lower and lower. That's why the reality is that we're nowhere near fully closed loop systems and the Medtronic 670G shouldn't be thought of as anything other than a Hybrid System.
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Aye, I do understand why they’d do it that way. If only we could actually mop up excess insulin without having to eat sugar!
 
Mel dCP said:
I can appreciate that. But if it’s basically a closed loop system, I’d expect normal glucose levels to at least be the target, even if that’s not always achieved.
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Just a thought but if the target issnt achievable what is the loop supposed to do?

Should it drop the loop or start a yo yo effect or worse....

Guess ive answered my own questions about the 670g and how its setup and why it does what ive read about it.
 
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