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RE: [IP] how much of a bg rise
> As per Michael:
> You might consider teaching them to calculate unused insulin so they
> can test in 1 to 1 1/2 hours and see if they are on the right track
> and modify the dose accordingly. My daughter has managed to whittle
> this down to about 30 - 45 minutes when she's high and can bring her
> bg's to target when high very quickly. email @ redacted
> I wish you would teach me to caluculate unused insulin so I can tell
> if I am way off ahead of time.
There is a section in Pumping Insulin I believe. These are the
guide lines I use.
Assume roughly linear absorbtion for the first hour or so for entire
dose based on a peak time of 2 hours. This implies that bg's should
come down about 20% every 30 minutes. That is an absorbtion of 80% in
2 hours -- My best estimate is that it is more like 70%, but YMMV --
close enough. The remaining "tail" is absorbed over the next 1 1/2
hours based on the curves for humalog.
For Regular insulin or Velosulin, it is more like 10% every 30
minutes for 4 hours.
With normal bg's, the "tail" is usually not noticeable and is only
important if bg's have been low as it will generally drive them lower
in a manner you would not expect. It is also enough to bring down a
post-prandial "mild" high of 150+
For very LARGE boluses, I have observed an insulin pooling effect
that initially slows absorption so the first half hour may be much
less than anticipated, but catches up quickly thereafter.
Insulin Pumpers website http://www.insulin-pumpers.org/
for mail subscription assistance, contact: HELP@insulin-pumpers.org