Here's another quandary:
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You are a T1 diabetic, and so you have to do all of those calculations in your head, or your insulin pump, but in the interest of saving money, you use shots and regular/NPH insulin, instead of a pump ($7000, plus $40/week in supplies and insulin) and a CGM ($1400, plus $50/week), supplied by Dexcom, since Apple isn't making a CGM, just a watch to see the results of that CGM on the watch. You wake up (or not) with blood sugar between 30 and 400, because your carb:insulin ratio didn't take into account the stress you had remembering the foxtrot on the dance floor, the dawn effect, the syringe you used didn't have the resolution needed to give yourself 4.8 units, or that the NPH kicked in after the sugar wore off of that cake, or some reason you didn't take into account, like over/underestimating the carb/fat/protein ratios and the glycemic index of that cake and your body.
Oh yeah, that 10 quid was for the meter. The test strips are still $1/ea for the OneTouch Brand. The meter companies don't lose money, and the meter is a loss leader. Ever try to get the Bayer meter to read a OneTouch Strip?
Come over to my house. I'll let you walk a mile in my shoes.
ObamaCare pays for test strips. I get 150 at a time. Co-pay is low. Certainly more like 15 cents a strip.
Also, you should look into the recently introduced Aviva Expert meter. It has a nice bit of programming that will take into account the carbs you consume, the amount of active insulin still working and suggest the bolus you should use. I just got this meter about a month ago and am still learning it's ins and outs. But it's quite an advancement over the older meters. If you can get it (it's by RX only), you won't regret it.
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So will this app negate the need for a receiver? My daughter was recently diagnosed with T1 DM, and we are currently researching pumps and CGM's. She has an iPhone 5 that she is allowed to use while in school to be in touch with us (our principal is also Type 1 and he is the one who suggested this). It would be nice to be able to use an iPhone app, once available with the next Dexcom CGM, instead of also carrying around a receiver.
The app (via the Apple Watch) is the receiver.
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@Hyper - be careful here. Remember, you need the Dexcom CGM system in order for this App to work. The Apple Watch does not have CGM or Blood Glucose monitoring functionality built into it.
This thread just references the ability to use the iPhone/Apple Watch as the Dexcom receiver. Which to Dexcom users is very exciting.
As I'm reading comments more and more referencing this functionality elsewhere on the internet, many seem to have the misconception that the Apple Watch is going to measure everyone's blood sugar. This is simply not true.
I know that and will be getting a Dexcom CGM system along with the Apple Watch. This is some of the best news I've heard since becoming diabetic in 1978 (27 years old and gets Type I diabetes-go figure!).