Dexcom G7

Thank you so much. I thought there was but for the life of me could not find it. I see the gear now in the New topics as well as the reply to posts section to “build poll” Now just need the time to do it.

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Nice job!!

Only suggestion is maybe add an option for other, for someone that has answer but not on list. Then person could add comment as a reply.

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Thank you - I tried to add “other” option now but the poll says you can only modify poll within 5 minutes of launching it. Oh, well, live and learn for future polls.

Hi Marilyn6,
Yes, am in Canada but Omnipod Dash frequently wants me to send back a defective Omnipod. Guess their tracking is a bit better here in Canada.

As far as Dexcom G7 goes, have only be using it since November 2023 and it has not failed on me at all. Seems to be quite accurate except the last one which would not allow me to calibrate for about 2 full days. Called Dexcom Canada and they send me out a new one right away. Just got the shipping notification today.

Hi, I am glad that you like the G7, I do too. After I received an email from Dexcom about returning my sensor, I called them and told them that I wasn’t told to keep the old sensor while they sent me a new one. The woman I spoke with told me not to worry about it. From now on I will keep any bad sensor until I get the return box.

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Good plan Marilyn6. Makes perfect sense. :slightly_smiling_face:

If your sensor is in the trash, there is not much that you can do. I would place a note in the return box that says the following: “I apologize for not sending the defective G7 sensor back to you. I was never told that I needed to send the sensor back, so I threw it in the trash. Please make sure that your representatives tell patients that when they receive a replacement, they will need to send the old sensor back. Thank you for taking care of this issue.” And then mail the box and your note back to Dexcom. Maybe they will get the hint…

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I called Dexcom this morning and said almost the same thing that you wrote!

I have had many G6’s replaced by Dexcom for early failures and they have never asked for the bad G6 to be sent back. Regarding accuracy, both the CGM and the glucometer have the same accuracy, i.e.: Readings are within 15 percent of the actual blood glucose for all readings within meter’s (or CGM that can substitute for a glucometer) blood glucose range 95% of the time and are 99 percent accurate within 20 percent for all readings within that range. So, if a meter reading is 100, that means the actual blood glucose is within 80-120. Thus when the meter returns 100 and the CGM returns 80, they are equivalent in accuracy.

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I agree with your sentiment about comparing CGM to BGM numbers.

CGM and BGM devices have different FDA device classifications and with those classifications come different accuracy specifications. Unfortunately this means saying a CGM is as accurate as a BGM is incorrect. I encourage you to read the following:

Also note at the moment a CGM could be about 6 different device classifications.

And what was their response?

The woman I talked with was extremely nice. She told me not to worry about it. She said that they are using information from the returned G7’s to see what went wrong.

Thanks Spdif, I did not check for the latest info re: CGM. I was basing it on what the FDA was initially considering, that a CGM approved to substitute for a needlestick would have the same accuracy. Since most people base their accuracy considerations on home glucometers, that was what I based my answer on. Basing accuracy of one device with a wide variation to another device with a wide variation is not a good way of judging accuracy. Studies have shown that glucometers may not meet FDA, ISO, DIN standards. Test strips may not be stored properly, meters get abused, there is no way to calibrate the SMBG devices.

Eons ago, I spoke with one of the developers of the first gen. of CGM, he said that the device was highly accurate for measuring glucose in the interstitial fluid, the devil was in developing the database to correlate those readings with venous glucose levels and then to capillary levels. That is what we are facing, none of the devices available to us measure venous glucose levels.