I currently use a medtronic 670g insulin pump.The sensors are designed to last 7 days, but seldom last more than 5 and many fail within the first few days.On average, at last 1 sensor fails (often 2) after a few days per box.Medtronic swears it's from wet or loose tape, however, i've had multiple training sessions and doubled up tape to no avail.Per the forums and my dr, this is not uncommon and sensor problems have plagued this device.In the past, medtronic simply replaced them free of charge (just send the failed sensors in for replacements), now you must call immediately when a sensor fails to get a replacement.They either have a product design issue or a mfg issue.I alone have had close to 20 failures over the past two years.I have collected the most recent batch of failed sensors (6 over 3 months) and kept the most recent boxes if you need the numbers of them.Fda safety report id# (b)(4).
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