Continuous Glucose Monitors

By Aaron1977 Latest Reply 2011-02-12 13:54:15 -0600
Started 2011-01-26 10:30:48 -0600

Hello everyone! I started using a CGM this morning and did my first calibration. I finger tested at 239 and input that into the pump. The pump then showed I rose to 291 over the next hour and a half. I did another finger test and it came back 219 - so I input that into the pump and the reading dropped to 286.

Anyone have any experience with CGM's that could give any advice? Does it take a while for the calibrations to hit the pump? I'm going to keep finger testing throughout today to see how it compares.


9 replies

northerngal 2011-02-12 13:54:15 -0600 Report

When I've used them, it varied by 20points or more pretty consistently. After about 4 days, they tended to be a lot further apart. They are awsome for signalling a low though. Especially while exercising, when you are less likely to feel it right away.

ghdan 2011-01-29 14:28:36 -0600 Report

I've been using the Medtronic CGM for about a year. The results seem to be the best when you calibrate 4 times a day with a fair amount of time between the calibrations (a few hours). My Doc constantly tells me that you shouldn't use the results for dosing decisions, but I do occasionally. She says that the sensor only should be used to tell you which direction your blood sugar is going, not what it really is.


Rainerm 2011-01-27 16:10:25 -0600 Report

I struggled with this ame problem when I used the sensor. It seemed to always be innaccurate. It did tell me when I was dropping, which was nice. It's been about three years and I just ordered new sensors! Hopefully, it will work out better this time. Try to get your number in a lower range when you callibrate the first time and see if you get better readings. I seem to remember something about that from my first sensor experience.

Aaron1977 2011-01-27 12:28:33 -0600 Report

Day 2 seems a LOT better than day 1. My calibrations are a lot closer to what the sensors says than they were yesterday. I'm starting to almost trust it…

Harlen 2011-01-26 14:12:36 -0600 Report

I used it when I first started on the pump
CGM's are not up to the min right on lol They are good for letting you know if your crashing or going to the moon thats why they tell you to finger stick be for you make an ajustment to the pump
Hope this helps

Jeanette Terry
Jeanette Terry 2011-01-26 13:06:50 -0600 Report

I tried the CGM a few months ago and had the same problem that you are having. When I asked the diabetes educator about it she said that it won't always be the same depending on how good the sensor is. But mine never got better. I tried it for 2 weeks and had trouble with it the whole time. It works great for some people, but my experience with it wasn't a good one.

kdroberts 2011-01-26 13:47:39 -0600 Report

My doctor said pretty much the same thing. The people who do well with it are those who have wild swings or hypoglycemia unawareness and use the alarms. He said the majority of his patients that used one just to see what their blood sugar was doing generally found the very frustrating and most discontinued use.

Aaron1977 2011-01-26 15:31:59 -0600 Report

Edgepark told me I could return the sensor for a refund within 30 days - so I'm going to keep trying at it for a few weeks. I'm a little disappointed on day 1 - but I'm trying to keep an open mind…

kdroberts 2011-01-26 10:52:54 -0600 Report

Are you calibrating using the CGM instructions? It sounds like you are using a minimed one, possibly the revel, which means you need a minimum of 2 calibrations per day but a recommended 4+. It's also best to calibrate when your blood sugar is more or less steady. You'll need to do the same thing with every sensor that you use. The basic reason a CGM can be way off with blood sugar readings is that they don't test your blood sugar so they are trying to figure it out based on some baselines that you provide with your finger sticks.

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