The Dexcom is a device that is inserted into the skin and checks a persons blood sugar every 5 minutes. That's up to 288 readings per day! This device shows blood sugar trends and alerts you to highs and lows. The real time data helps the user make more confidant treatment decisions.
The Dexcom is a set of three components; the sensor, the transmitter and the receiver. The sensor is the part that sticks on your body and the tiny sensor wire is inserted into the skin. In the above picture I still have the applicator attatched to the sensor, the applicator is the part that contains the needle. The needle is inserted into the skin using the plunger device. The needle is then pulled out, but the sensor wire stays in the skin.
The transmitter is the small gray piece and it sits in the sensor housing. This is the component that receives the data from the sensor wire that is inserted in the body and sends the information via bluetooth to the receiver.
The receiver is about the size of a small cellphone and is what you use to read the data on. I am currently using my IPhone as my receiver but it is always nice to have a back-up.
I am in my second week of using the Dexcom and will do a site change today. Allow me to start from the beginning though; as soon as I received the Dex in the mail, it was recommended to me to contact my Certified Diabetic Educator(CDE). I know some people are able to manage setting it up themselves but I am more of a visual learner and it was easier for me to learn how to do it with the educator walking me through the process. She took the time to explain all of the components to me and was even able to show me what the sensor wire looked like before I inserted mine into my body (it's as thin as a horse hair). She then walked me through every step of the actual application of the Dexcom. She suggested I use my stomach for the first time since that location usually gives the most accurate readings. If you are new to the Dexcom, I highly suggest getting in touch with your clinic to see if they offer appointments for first time Dexcom users, I found it very educational and beneficial. There is even an app that the company offers called Clarity that allows you to share your information with your clinic.
We initially did all of the communicating with the Dexcom transmitter using the receiver. However, now that I am home and have been using the Dex for a couple weeks now, I find that using the Dexcom App on my Iphone is the easiest method for me. Using the App eliminates the need to have to carry around an additional device. However; just be aware that whichever device you choose to use, it has to be within so many feet of you to be able to pick up a signal. If I set my receiver down and exit the room it will beep incessantly until I am near it again and it picks the signal back up.
Before I received the Dexcom and started using it, I assumed that my numbers on the Dexcom would match perfectly to my numbers on my meter. This isn't the case. I have only had two instances where I calibrated the Dexcom and the number matched exactly what my meter was reading. In all actuality, the first day or two of a new sensor can provide some pretty crazy readings. I actually ended up calling the company because of this. I was informed that the device is allowed to be within 20% of a reading if above 100 and within 20 points if below 100. The readings that I was receiving were about 30% off, which I was not expecting and those numbers left me a little skeptical. Fortunately though, after a couple more calibrations my data seemed to be getting more accurate. So far though, that has been my experience after changing sensors. Later today I'll be changing into my third sensor and I'm already expecting my numbers to be a little off. Fingers crossed it goes smoothly and I don't get any crazy readings coming in.
So far the best thing about the Dexcom is the alerts that it gives you and the trends. I was at the gym a few days ago and forgot to bring a snack or one of my shakes in with me. I was able to open the App and see that I was in the mid seventies and with the exertion from exercise I was trending down. I had to cut my gym session short but I was also able to prevent a low. It has also made me aware that sometimes, right after I eat, my sugars shoot up into the 200 range but fall back down by the two hour mark. This is something that I need to bring up to my Endocrinologist to see if she has any recommendations on keeping my blood sugars in range even after eating.
So overall, I would say so far, so good. If you are interested in purchasing a Dexcom, please don't be expecting 100% accuracy all of the time. I'm excited to have more control over my sugars though and hoping that my A1C improves.









