It would appear that for the second date in a row since I started my pump on Monday that the insulin seems to have gone bad. My sugar will spike during lunch standard but not go back down... The only thing I found in common with this is that the last 2 days since I got the pump on I left my house it has been a little over 100 degrees outside. Anyone else have this issue, or advice on this?

Tags: bad, insulin

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I have a MM722 and was concerned about heat having fried it when it blew up in July and the MM sales guy said 'it's not the heat, we test them @ 140 degrees" or something like that. It was "only" high 80s/low 90s here but was very humid and sweaty. I seem to have the most trouble w/ lunch these days and usually just set a higher carb/insulin ratio during that time period. You might have some success w/ that?
If you're ok before lunch, then it's probably not the insulin. Your body may have different needs though if there's a big change in weather. If it's not coming down, then pre-bolusing probably won't help, but might be worth a shot. I agree with AR, try increasing your I:C ratio for lunch. How high is it spiking?
I am a Texan, and work outside in the yard lots - some work easy, some hard - and in the all day heat (though today was actually a "good" day at my house, never hit 100 degrees!). Anyway, I find with insulin and heat - day one and two are no trouble, insulin works with no trouble and I do not need to adjust amount bolused for carbs. Usually into day 3 and for sure if I do not change sites prior to day 4, I find a tendency for unexplained highs and I must increase insulin amount to cover carbs and usually my basal rates must also increase. Once I do a site change, all is back to normal. In the cooler months (winter), I find that if I go into day 4 before a site change I am usually fine. Therefore I blame the summer changes in the length of time my insulin is "good" on the heat - but the changes in sugars worsen as the day progresses and are not dependent on carb intake or time of day.
Thank you guys I think the I:C ration might be a good hit, so tonight I posted this question prematurally it would appear. As I was doing it I gave myself an increased Bolus just about 4 units and it finally started dropping. I was at 260 for like an hour though and it just didn't seem to be dropping. I tend to get parnoid easily too though lol. I don't have any diabetic friends, and my cousin the only other person I know personally lives in Florida. Being new to the pump and all, but I think some I:C adjustments in the noon times, that combied with maybe trying to use the combo bolus or something. I am glad I found this site though you all are very helpful.
You have 20,000 friends w/ diabetes! While it's less convenient, I think that it's much more useful to think in terms of the ratio than in terms of "taking 4 units"? 4 units can be useful but I usually use the MM "bolus wizard" unless it's a small CB, like .5U. Once the ratio is set, you should be good to go. I also have noticed that just being off by a G/U will make the numbers off 40-80 points, meaning the difference between 120 and 200 sometimes?
Temperatures over 98 can damage insulin.
Heat does weaken insulin. It often won't make it totally ineffective, but will cause it to not work as well. I believe there are Frio pouches taht you can wrap around your pump to help keep the insulin cool. You also might want to just put a small amount of insulin in (enough for two days) and change out the resevoir without changing your site (you don't have to change both at the same time, do you)?

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