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Permalink Reply by acidrock23 on September 15, 2011 at 7:11pm

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?

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Permalink Reply by jrtpup on September 15, 2011 at 7:30pm

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?

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Permalink Reply by Korrie on September 15, 2011 at 7:44pm

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.

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Permalink Reply by Kickinpwnr on September 15, 2011 at 8:18pm

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.

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Permalink Reply by acidrock23 on September 15, 2011 at 9:39pm

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?

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Permalink Reply by jupton on September 16, 2011 at 5:51am

Temperatures over 98 can damage insulin.

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Permalink Reply by MyBustedPancreas on September 16, 2011 at 11:24am

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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