• Guest - w'd love to know what you think about the forum! Take the 2025 Survey »

Dexcom g4 readings not matching bg

She doesnt have them every day she mostly has weetabix, rice crispies, cheerios, but does sometimes have them as do the other 3, non of them are over weight or unhealthy and are all very active so i dont mind the odd bowl of coco pops,

Sent from my SM-A300FU using Diabetes.co.uk Forum mobile app

I love cereal and eat a lot of it. I find if I don't bolus enough in advance, my blood sugar will shoot up to around 11-13 and then drop down later. The drop you describe your daughter having made me wonder if it could be to do with the supper bolus amount and/or timing. It may be that by bolusing earlier, you can actually reduce the bolus amount but stop the spike (because the insulin will be working earlier to catch it) and stop the low (because the bolus will be more correctly timed to the cereal and you may not need so much bolus).
 
I love cereal and eat a lot of it. I find if I don't bolus enough in advance, my blood sugar will shoot up to around 11-13 and then drop down later. The drop you describe your daughter having made me wonder if it could be to do with the supper bolus amount and/or timing. It may be that by bolusing earlier, you can actually reduce the bolus amount but stop the spike (because the insulin will be working earlier to catch it) and stop the low (because the bolus will be more correctly timed to the cereal and you may not need so much bolus).
Thats sound a good thing to do, i will try givin 20 mins before her supper her ratio at supper is 1 in 20.. it would be great if i could stop the big drop she has so i will try that tonight thankyou

Sent from my SM-A300FU using Diabetes.co.uk Forum mobile app
 
Thats sound a good thing to do, i will try givin 20 mins before her supper her ratio at supper is 1 in 20.. it would be great if i could stop the big drop she has so i will try that tonight thankyou

Sent from my SM-A300FU using Diabetes.co.uk Forum mobile app

It may take a little experimentation to get the amount and timing of the bolus right, so keep tweaking carefully :)
 
What kind of protein based thing would you suggest, i will try her with anything if she will eat it, its just that her dsn said while shes having the night time hypos to make sure shes having carbs before bed to keep her bg up a bit, but i will give anything a try

Sent from my SM-A300FU using Diabetes.co.uk Forum mobile app
You could try a slice of cheese on toast? The snack before bed doesn't have to be protein based - just lowish carb.

This bread works out at 6g per slice (typical breads are 15-20g), once you have deducted the fibre from the total carbohydrate content. Considering your daughter's BG seems to be falling over night - I wouldn't bother with a bolus dose for this either:

http://m.tesco.com/h5/groceries/r/www.tesco.com/groceries/product/details/?id=253803607

The bread is really nice too:)

Grant
 
I was going to suggest scrambled egg with some cheese or a tiny bit of ham or corned beef thrown in.
 
You could try a slice of cheese on toast? The snack before bed doesn't have to be protein based - just lowish carb.

This bread works out at 6g per slice (typical breads are 15-20g), once you have deducted the fibre from the total carbohydrate content. Considering your daughter's BG seems to be falling over night - I wouldn't bother with a bolus dose for this either:

http://m.tesco.com/h5/groceries/r/www.tesco.com/groceries/product/details/?id=253803607

The bread is really nice too:)

Grant

Look like 11g per slice ?
 
This bread works out at 6g per slice (typical breads are 15-20g), once you have deducted the fibre from the total carbohydrate content. Considering your daughter's BG seems to be falling over night - I wouldn't bother with a bolus dose for this either:
It's 11 grams a slice and you have to remember what you think is nice a 2 year old wont :)
 
You could try a slice of cheese on toast? The snack before bed doesn't have to be protein based - just lowish carb.

This bread works out at 6g per slice (typical breads are 15-20g), once you have deducted the fibre from the total carbohydrate content. Considering your daughter's BG seems to be falling over night - I wouldn't bother with a bolus dose for this either:

http://m.tesco.com/h5/groceries/r/www.tesco.com/groceries/product/details/?id=253803607

The bread is really nice too:)

Grant

@GrantGam1337 Its the total carbohydrate we use so that's the figure we need to count -ie 11g here.

( I just noticed that you'd talked about deducting the fibre)
 
You could try a slice of cheese on toast? The snack before bed doesn't have to be protein based - just lowish carb.

This bread works out at 6g per slice (typical breads are 15-20g), once you have deducted the fibre from the total carbohydrate content. Considering your daughter's BG seems to be falling over night - I wouldn't bother with a bolus dose for this either:

http://m.tesco.com/h5/groceries/r/www.tesco.com/groceries/product/details/?id=253803607

The bread is really nice too:)

Grant

We don't deduct fibre, that's an American thing. U.K. Nutritional labels have already worked this out - we just use the total carb figure.
 
I am no expert but is a pump the right thing to have if she is on the lowest basal rate and still is not low enough.
I have been seeing my DSN a lot lately and she has persuaded me to run my sugars higher. What surprised me was my average level ( Hba ) only went up by 4 units to 54. So reducing my hypos and helping to keep my hypo awareness
 
I am no expert but is a pump the right thing to have if she is on the lowest basal rate and still is not low enough.
I have been seeing my DSN a lot lately and she has persuaded me to run my sugars higher. What surprised me was my average level ( Hba ) only went up by 4 units to 54. So reducing my hypos and helping to keep my hypo awareness
She cant get the tiny doses she needs on the pens hence why she was put on the pump

Sent from my SM-A300FU using Diabetes.co.uk Forum mobile app
 
We don't deduct fibre, that's an American thing. U.K. Nutritional labels have already worked this out - we just use the total carb figure.
I was always taught to deduct fibre from the total carbohydrate content. And I live in Scotland.
 
Yeah that's how I was taught at my clinic. Seems to work for me...

Maybe they teach a different method in your area? Obviously, you shoukd do as you've been advised else it may cause difficulties in your calculations and ratios :)

But the usual method is to consider the total carbs and any ratios given will have been calculated using that figure too.

Anyone reading this who is in any doubt about how their ratio has been calculated should check with their DSN.
 
Maybe they teach a different method in your area? Obviously, you shoukd do as you've been advised else it may cause difficulties in your calculations and ratios :)

But the usual method is to consider the total carbs and any ratios given will have been calculated using that figure too.

Anyone reading this who is in any doubt about how their ratio has been calculated should check with their DSN.
I would have thought the rules were Nation wide. I'm in NE Scotland.
 
I'm late to replying to this thread, but I'd like to offer a few words that I hope may help.

I've been on the Dexcom G5 since last September when it came out and I LITERALLY trust my life to it....but I had to learn how to use it first. I think the number one thing I've learned in that time what that there is a time to blame the CGM, a time to blame technology in general, and a time to blame it on user error. I'd dare to say that the CGM is to blame less than 5% of the time.

Common frustrations:
1.) The readings are off- off from what? A standard glucometer has a margin of error also. Plus, they take measurements in two different ways as mentioned previously. It may the the CGM's fault or you could be dehydrated, calibrated it incorrectly, restricting blood flow to that area (especially if you sleep on it), or similar issues.

2.) Signal loss- while this happens much less frequently with the G4 (vs the g5) it still happens. I know it's particularly frustrating when it's a medical device, but that doesn't mean it's except from signal interference just like any other device. If you're ever curious, there are Bluetooth signal detector apps in the Apple App Store that will detect all of the Bluetooth signals around you. After I realized that my CGM was trying to stay connected to a signal device in a sea of more than 30 devices (airports are nightmares) I appreciated it's consistency much more.

A bit about what works well for me:
I almost always calibrate the CGM when my blood sugar is most stable. That ensures the least margin of error rather than worrying about the 10-20 minute delay in readings.

Occasionally, I will calibrate on the peak of a high or a low, but that's a much more complicated process that took time to learn as you have to consider what the trend arrows are telling you. Example: if my CGM says I'm at 9 mmol/l and the trend arrow says I'm still climbing then I wouldn't calibrate because it could just be the delay. However, if it says I'm at 9 and the arrow (and graph) shows I've reached a peak, but my glucometer says I'm really at 12mmol/l then I may calibrate the CGM.

What I deal with/dealt with:
I often get false hypo alerts (my family members get the alerts too) in the middle of the night because I roll over on my side and sleep on the sensor/transmitter. I've shared the full story on here before, but it happened once where my family called me and I didn't hear my phone (ring 25 times). I eventually woke up to paramedics at my door even though my blood sugar was really around 5-6 and perfectly okay. In the end, this was my fault not the CGM.

I used to get horrible sensor loss issues. It was particularly frustrating because it seemed to happen right after I went to sleep which rendered the CGM useless at night. I eventually realized that it was an issue with the iPhone software and running too many background apps. Again, not the CGMs fault.

I've wasted 2 sensors trying to install them on the back of my arms like some people do. It just doesn't work for me. Not the CGMs fault. However, every once in a while (maybe 1 in 15) I get a sensor that doesn't work even when installed perfectly. Dexcom has always been great about replacing them for me. It's a pain and I do blame it on the CGM, but I know Dexcom is working on a new sensor with a single push button applicator.

Just a few thoughts. Hopefully there's something that may be valuable in all of that :)
 
I would have thought the rules were Nation wide. I'm in NE Scotland.

Yep you would have thought so. [although, no "rules" - it's all just guides and what works] But definitely stick with what you've been taught and what works for you. Maybe others in Scotland will be able to add more :)

The U.K. wide DAFNE course says use total carbs and do not deduct fibre.

This Edinburgh site on carb counting doesn't mention deducting fibre - http://www.edinburghdiabetes.com/carbcount - it's quite a good guide site though as a reference material.

Edit: wrong link, sorry! Correct page linked now, put the front page to the site still looks good - http://www.edinburghdiabetes.com/intensive-diabetes-control/
 
Last edited by a moderator:
It's possible that I've been doing it wrong! But it's certainly what was suggested by DSN and Dr.

I'd better check with them at my next visit!
 
Back
Top