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Dexcom Users

For users of a Dexcom Continuous Glucose Monitoring ("CGM") device

Just as a reminder with the recent release of the new Dexcom G4 to the US market--it is NOT okay to post about previous models or older sensors as being 'for sale' on this site.

It is a violation of the Terms of Use because it is a prescription device, and any such efforts will unfortunately be removed.

We encourage you to donate supplies to non-profits such as the Charles Ray III Diabetes Association (http://www.cr3diabetes.org), which accepts unexpired glucometer and insulin pump supplies, or alternatively you may talk to your physician's office or other local medical group to discuss donating them to those in need of assistance.

Thank you all for kindly refraining from this activity.

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Rich demos insertion of a G4 sensor- video

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Diabetes Forum

Dexcom G4 w Animas Vibe Pump Impressions?

Started by Fred Goldberg. Last reply by Fred Goldberg 3 hours ago. 5 Replies

Dexcom G4 transmitter lifespan

Started by Jaybyrd. Last reply by 2hobbit1 on Monday. 7 Replies

A Little Unscientific G4 Research

Started by Elizabeth. Last reply by bort269 on Friday. 71 Replies

Sensor placement

Started by Dave. Last reply by SiggyB Apr 17. 45 Replies

Adhesive allergy

Started by duckatect. Last reply by Melissa M. Apr 17. 7 Replies

OUCH!!!! Very painful insertion just now

Started by Gayle Kodimer Mckenna. Last reply by Bambi Apr 15. 25 Replies

Blood on Sensor Insertion

Started by markeeezy. Last reply by Dondi Apr 14. 6 Replies

? About ???

Started by dishers. Last reply by Joern Apr 13. 9 Replies

Traveling

Started by Aussie. Last reply by Ellie Apr 11. 14 Replies

delivery times?

Started by dishers. Last reply by dishers Apr 8. 2 Replies

Comment Wall

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Comment by Jennifer on February 6, 2012 at 8:54am

Out of curiousity, what are your alert limits set at?

Comment by john on January 24, 2012 at 8:02pm

Yeah but, the flip is that, if you travel, especially out of the USA, AAA batteries are available almost everywhere; so you'll alkways have juice.

Comment by Rickst29 on January 24, 2012 at 6:29pm

Laura: it's BOTH. Minimed has an advantage in using the pump as the 'Receiver', it takes an everyday AA disposable. But their transmitter has the hassles of recharging, with much SHORTER lifespan than either of the Dexcom parts, and it costs a lot of money.

I'd recommend an entire new kit, because the Receiver battery is likely to wear out shortly after the Transmitter looses too much effective range. ("Receiver battery wears out" means that you're having to recharge it WAY to often; it can't hold enough energy after it gets "old".)

Comment by Laura on January 23, 2012 at 8:46am

Comment by Laura on January 23, 2012 at 8:46am

So you guys are saying - that the Dexcom itself, goes bad after 12-15 months or the gray transmitter goes bad? Or both? I certainly was never informed that I'd have to buy a New Dex within a year or so. Or a new transmitter. How much is a transmitter these days? Do they charge you the whole price of a totally new Dexcom?

Comment by Rickst29 on January 20, 2012 at 10:05pm

Doug: because the Transmitter is a fully-sealed device, it (supposedly) "can't" break in a way which exposes the battery.

But the Receiver... hmmm, IMO it IS suitable for hazardous waste disposal (the 'paid-for' kind, not the lazy 'we'll take the light bulbs and car batteries we sell' kind.

This is a Gel battery in foil (not in strong packaging) If the Receiver case breaks open when the garbage truck guys run their "trash-squisher" thingy, it can theoretically get torn open and leak.

Here's what I've done: I've simply never thrown away my old, dead ones. When my city GETS A CLUE!!! and implements a proper hazardous waste disposal, then I'll take them in -- all at once.

The battery in the Transmitter is probably very dangerous (maybe even to breathe fumes). But it won't get broken apart by regular trash handling, and the plastic will hold together for hundreds of years in a typical landfill. (in the desert, where I live, it probably won't leak for several THOUSAND years.) The Transmitter is breakable, under a lot of force, and would spill it's gel/fluid if the battery foil got torn. IMO, you should not let it get handled as regular trash.

Comment by Rickst29 on January 20, 2012 at 5:04pm

For Rascal Richard:
The FDA requires that prescription meds and DME "consumable supplies" have an expiration date. But, that can be as long as a year.

That's not the issue with the Sensors. Dexcom limits the "not guaranteed for use after" dates to 6 months, because the reagents do have some degradation over time. And that time is temperature dependent: In comparision to "normal" indoor temps, you can gain a couple more months by keeping them in a wine fridge, at 50-55F. But less than about 40F is WORSE for lifespan than room temperature. So a regular refrigerator isn't a great idea, unless you keep it well above freezing.

The date on the label isn't describing an "off like a LIGHT SWITCH" situation. Degradation occurs over time. Dexcom switched the time limit which THEY are willing to guarantee a few years ago- it used to be only 3 months.

Comment by Rickst29 on January 20, 2012 at 4:49pm

The Receiver contains a rechargeable battery. After 12-18 months of charge/discharge cycles, it can't accept (and hold) very much energy per charge cycle anymore. The battery wears out, just like a NiMH "AA" flashlight battery. (Although the battery in the Dexcom Reciever *is not* NiMH, it appears to be a type of Lithium Gel cell.)

The Transmitter contains a SINGLE-USE battery, with extremely high energy density. The chemicals are dangerous, so please don't go digging in there with a sledgehammer. I think that our use-once, never recharge 11-15 month battery is a far bettery deal than Minimed's rechargeable- which wears out, in the same way as the Dexcom RECEIVER, much faster. And the unit costs more.

The plastic Sensor pad contains nothing except the two contacts, and the carefully-built connection between those contacts and the Sensor wire. Go ahead and break one apart after you've used it, and you'll see that there isn't any room for a battery.

Even if I pretend that I'd never seen one before, you can figure it out from the simple fact that the Transmitter begins to loose range (effective distance) over time. If it was getting a fresh power supply with every new Sensor, that wouldn't happen!

Power is within the clip-in Transmitter itself, and the battery lasts a pretty long time.

Comment by Richard157 on January 20, 2012 at 3:27pm

Thanks Doug, Lauren and Mossdog!!

Comment by MossDog on January 20, 2012 at 1:01am

Doug:
Check out Dexcom's website. It says right on it the battery is in the receiver not the sensor. I have heard of people using the sensors a couple years old without a problem although that is a use at your own risk kind of thing. Also, you have to have lot numbers and what not to get a sensor replaced and all of that let's Dexcom know when the expiration date was so the warranty is void at that point anyway.

 

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