# Re: [IP] carb counting {Unused insulin}

• To: Insulin Pumpers <email @ redacted>
• Subject: Re: [IP] carb counting {Unused insulin}
• From: Jay Watson <email @ redacted>
• Date: Sat, 22 Nov 1997 19:23:47 -0500

```I started thinking along the line of UnUsed Insulin when I started
frequent testing (7-10 per day).  Without considering this, it is easy
to double-bolus, where you don't consider the "unused insulin" and bolus
twice for the "same" high.  I took the Lilley information from the
Humalog data sheet and I put that into an Excel spreadsheet.  From this
I integrated the serum-insulin curves and could calculate the percent of
a dose that is "unused" as a function of time.  The data below is that
calculation.  I have done this for both Humalog and Regular insulins.  I
include it all in the event that someone is interested in following the
mathematics.  If anyone would like the spreadsheet emailed to them,
email that request to me and include what version of Excel you are
using.
Jay
(SFI -Serum Free Insulin)

[Image]

Ruth Elowitz wrote:

> Michael wrote:
> >
> > On Thu, 20 Nov 1997 email @ redacted wrote:
> > > What do you people do when you are out, and don'y know the carb
> count of
> > > something? Do you not eat it? do
> > > you take a guess? Just what do you do?
> > Yep!
> > Rember exchanges? (how could you forget) estimate like that.
> >
> > After carb counting awhile, you will be able to look at a plate of
> food
> > and guess within about 10%. Really!!  Lily can about 80-90 % of the
> time.
> >
> > The other trick is to eat, check in 1 hour, look at the rise or fall
> of
> > bg and adjust by using the unused insulin rule (or its converse if
> you're
> > high).  You'd be supprised how many servings of things are exactly
> one
> > exchange.
> >
> > Michael
> >
> Michael,
>
> Could you share (perhaps again I'm afraid) the "unused insulin rule"?
>
> Thanks!!
>
> Ruth
> > >

```