Medatronic pump working, but blood sugar rising

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rachel0593

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Hiya, my mum has type 1 diabetes and has had a medatronic pump for a few years now. It's great compared to injections but what has been happening is the pump is working fine and after a day of changing the infusion set and site her reading will inexplicably start to rise.. even though she take correction doses along with her bolus.
so for example this evening she had a bs of 15mmol so took a correction dose of 1 unit along with her bolus. Her reading an hour later was 17.7mmol. She then had her dinner which had about 70g of carbs so took 4.5 units and now her reading is 21mmol so she's decided to take 2 units via injection to avoid being at risk of DKA.
As I say she's tested her pump and the insulin is coming out fine, she's not under the weather, there are no air bubble or leaks, only had it in the infusion site for 24 hours and it's not red or puffy so she's at a bit of a loss really.
If any of you have had the same issues or found out what causes this then please reply!
 
Hi Rachel,
welcome to the forum.
My sugestion is to try a different length of cannula.
(People tend to change shape and body mass as they mature in years)
If using a teflon cannula perhaps try a steel one.
The above solved the same problem for me 🙂


As an after thought, I have just realised your Mum is using a medtronic pump, so would she be using quicksets? I ask because there are a lot of comments from all over the world regarding the failure of these sets. So simple solution is use a different cannula.

Hope this helps.
 
Pumper_Sue said:
Hi Rachel,
welcome to the forum.
My sugestion is to try a different length of cannula.
(People tend to change shape and body mass as they mature in years)
If using a teflon cannula perhaps try a steel one.
The above solved the same problem for me 🙂


As an after thought, I have just realised your Mum is using a medtronic pump, so would she be using quicksets? I ask because there are a lot of comments from all over the world regarding the failure of these sets. So simple solution is use a different cannula.

Hope this helps.
Click to expand...

She's using silhouette paradigm, she's type 1 and 9st so had to use these as they had a 30 degree angle ( she doesn't have enough fat on her for a 90 degree! 🙂 ) I've told her about changing the canula length, i know they started sending her shorter ones (23mm i think) recently. I'm also trying to persuade her to get a cgm monitor and sensor!

Thanks for your reply!
 
In your Mum's position I would change reservoir and site again (even if she thinks they are fine).

Last week I had some very erratic numbers, and it turned out that the rubber 'o' rings had failed in a new reservoir which meant insulin was leaking back behind the plunger and not being delivered. I kicked myself as I'd re-changed the site 12 hours earlier as a precaution but left the 'old' reservoir in.

Another thought... How long has the vial of insulin been in use? Any chance it;s coming up to 30 days out of the fridge and/or may have got a bit warm? It might be losing potency?

Hope she manages to come down soon.
 
Hi,

I too would change the cannula etc We were told by a medtronic rep to wait an hour after a correction and if the bg level is the same number or less ok, if higher to change the lot.

Hope things improve for your mum soon 🙂
 
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