Weird Phenomenon So far, I've had a very positive experience with my Dexcom. However, I'm finding that certain conditions and situations cause "weird" things to happen with the sensor. First, my heart rate monitor does cause some interference between the transmitter and receiver. I've realized that while wearing my heart rate monitor, I must point the receiver directly at the transmitter/sensor and the distance between the units can't be more than 2 feet. Second, intense prolonged anaerobic exercise causes the transmitter to inaccurately read "HIGH" which means a BG value of above 400. This has happened a few times while running and swimming.
If I were Dexcom, I would explore how lactate, epinephrine, norepinephrine, growth hormone, cortisol, and glucagon (hormones released in high concentrations after intense anaerobic efforts) affect the accuracy of the sensor. I realize that everyone wont' be using their sensor at the same intensity that I do, but I think it's important to report my findings. Last, occasionally, the receiver will ask me for random calibrations, outside of the normal 12 hour schedule. After I calibrate, the receiver asks for another calibration a few minutes later. This happened a few days ago and I burned through 15 test strips in one day for calibrations. I'm going to call customer service to troubleshoot the idea tomorrow.