Is Your Dexcom Accurate? | When and How to Calibrate Your CGM
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- Опубліковано 5 лип 2024
- Do you suspect that your Dexcom readings might be wrong? Or maybe your finger stick results are very different from your Dexcom and now you no longer trust your CGM.
Believe me, you’re not alone, but there are guidelines for how close your CGM should be to your finger stick readings, and if you have a Dexcom, ways to fix the CGM and make it more accurate by calibrating your sensor.
And in this video, I’ll show you how.
This is NOT a paid promotion, none of this content is endorsed by Dexcom
0:00 Introduction
01:25 When is Dexcom no longer considered accurate?
02:11 When to calibrate Dexcom
03:22 How to calibrate Dexcom G7
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DISCLAIMER: I’m not a medical professional, never stop your current treatment without consulting with your doctor
I just calibrated my senior yesterday. I found doing so much more user-friendly using the receiver than the app on my phone.
Thanks for the informative video Christel. I am on my second G7 sensor and noticing the reading behavior is different from sensor to sensor. I think I need to calibrate often just ensure it is reading accurately and my own peace of mind. As I see readings over time I will become more familiar with how it behaves. So far I am happy starting on Dexcom G7.
I have slammed the sensor on the door and wall accidentally a few times. Learning to see if it will knock the readings out of wack...
Thanks I really appreciate the effort you put out to educate all of us out there on the things that are so important to many of us.
Only time I really have to calibrate is when I’m feeling low but dexcom says it’s normal or high
Thanks for sharing with us. I find that I might have to calibrate one time in the 10 days that my Dexcom G6 is on and that is usually in the first 24 hours of putting in a new sensor.
Thank you
For helping to have a manageable life
Thank you for your videos. I feel so much more educated after i watch one. I calibrate when I change my sensor. Sometimes, I force the calibration. I guess I need to wait it out like you do. I'm still on the G6 as I hate change, lol. I hope they don't pull it.
A few days ago, I had my sensor stop working a couple of times during the nighttime hours. (pretty scary) I calibrated much the following day. All was good. Not sure why it stopped, I wasn't lying on it. It did appear to spike dramatically during the night, however.
Again, thanks for all you do!!
Thank you for sharing your experience and for watching the video
Don't use the Dexcom but I had to still watch your video for supporting all you do to the community. I'm still in awe that I put mine into remission of type 2. Have a great day friend 👋
Thank you 🙂
So at what level reading should i calibrate the g7? If i calibrate when level at 110 it is 30 points high when i am at 180. If i calibrate when at 180, then it is 30 points lower when at 100 and gives me low coming soon alarms. Kinda maddening.
I calibrate the next day after insertion and I check every morning with finger sticks. If I have a big high or low, I find things get skewed after for me, so I keep on checking and calibrating as needed, though usually after 3 or 4 days I am usually within 5 points in the morning if I have a flat line on the Dexcom app.
Same here.
It is important to remember that the tolerance for a sample of blood, between two labs, is 6%. So, if your CGM and meter are within 6%, you probably don’t need too calibrate your CGM.
I take five readings an hour after inserting a new CGM sensor. Then average the readings, and calibrate the CGM to the average.
I guess I'm a bit picky. I've been doing the calibration if the difference is 10 or more rather than 20. I then check again in 24 hours with the same rule of 10. Once it's under 10 I leave it alone for the rest of the life of the sensor. I've yet to do a third calibration.
That’s what I do as well!! I’m just NOT feeling that 20.
My morning readings are often low, do you have a video about this issue?
This video might help: ua-cam.com/video/JrasikP_K2E/v-deo.htmlsi=CMD0tTFY8jbaQeP7
Is there a direct correlation between a1c and GMI that works for everyone? Personally my a1c is consistently 10% lower than my 90 day GMI (e.g. 6.3 vs 7.0)
My GMI is usually higher than my A1c as well. I haven’t seen any data on it, so only have anecdotal information
Me too, Dexcom says 6.2 but I am always under 6 when I see the doctor.
Hello. Brand new to Dexcom. I’m a bit overwhelmed with all the info and ensuring I am doing it correctly. I’ve never calibrated, was I suppose to do that upon the initial use? My readings always seem to be so high, and that is stressing me out. Thanks for any assistance.
Hi there. No need to do any calibration as long as the sensor reading is accurate. I hope you like G7
They need to upgrade the antenna in the G7. On several of the G7s I get sensor issue alerts one right after another. It work for 5 or ten minutes the another issue and It can go off for 20 minutes or so. My Dexcom 6 didn’t do this. So I think it’s a antenna issue.
They have issued new sensors with an updated antenna and other improvements. You can tell If you have a new version because on a number at the bottom on one of the sides with numbers, it has gone from rev 002 to 003 and there is a solid white line under it. I just got a shipment of the new ones but haven’t used them yet.
@@davidwilliamson7514 That underlined version means it will now interface with the Tandem t:slim pump.
This is somewhat off topic but I need an answer. When pairing a new G7 to the iPhone G7 app, and this not the first time but the second or later sensor change, the app will say Start Sensor. Next screen is an image of the applicator with the pairing code. My screen has no option anywhere to input the pairing code with a photo or manually. I cannot get past the applicator image screen except to go back to the previous Start Sensor screen. What "buttons" are present on your screen to continue onto the pairing number input? The work around for me is to delete the G7 app and reinstall it from the app store. I have had the same experience with sensor 2 and sensor 3. Dexcom help desk did not have an answer for it. Help!
Hmm, I haven’t had that issue. Kinda sounds like a software blip. Before changing your next sensor, you can consider deleting and reinstalling the app. That might fix it
@@DiabetesStrong I talked to the Dexcom help desk and they don't have any idea. Told me to call them the next time I'm changing the sensor and see if there is perhaps a setting on the phone that needs changing or whatever. As I said, I deleted and reinstalled the app twice now so I could pair the new sensor to my phone. Wait and see.
Do you need to get a new glucose meter every so often? If so, how long can you use a meter?
The meters can last for years. Most often I'd only change my meter if my insurance required it. Like the meter I show here, my insurance covers the strips for that 100%. So that's why I got it
@@DiabetesStrong Thank you! Please let us know when the Dexcom G7 Plus? comes out. The Dexcom for non-insulin users.
@@wanderlust2053 Dexcom Stelo just got FDA cleared TODAY! That was a super fast approval process. It should be commercially available in the US this summer (I just made an announcement in the community tab)
What if the Dex is reading LOW? Like danger low - while finger stick reads OK? (E.G. 69 vs 110?)
Note: mentioned in the vid…
Depending on the situation (In the video I mentioned a few situations where I wouldn't calibrate) you might want to consider calibrating the sensor.
@@DiabetesStrong I did that. *Wondered if I was wrong in doing so.* Thanks.
What is a desirable standard deviation?
I believe most recommend one below 35
@@DiabetesStrong thank you.
No it's not!!!
What’s not?
The GCM is not accurate. My machine alerted me that my sugar was 74 and I took my level and it was reading at 63.
@@user-ro8ei9iy7oBut that’s within the error range on the chart she shows at about 1:40 into the video. And certainly within the +/-20 pts she discusses before she shows the chart. Did you watch the video?
That’s actually not far off. It could be that your sugars were dropping quick and, since CGM is taking readings from interstitial fluid and is 5 min behind blood, the difference could explain that. I set my alerts at 80 not because I always treat for a low at 80, but because I want to check my blood glucose and make sure I’m not lower.
@@pM-sh4epOnly 5 minutes behind? I think I read it can be a lot more behind than that. Is there much u can do to make the sensor work better/faster if your blood test tells u it's way off? Hydration/physical activity? I'm on the Medtronic. My A1c was good but I don't fly on auto pilot. I do micro manage and occasionally get too aggressive and end up too low. I always have gatorade/glucose tablets/Baqsimi on me just in case.