Isf question

[psilocybin]

Nyome know if I can bolus .5 units instead of 1 and muliply my drop by 2 to measure my isf

[Subby]

Here's my thought: the less insulin you use to test your ISF in a controlled test, the more that basal discrepancies and other issues over the time period you test, will unduly influence the result either way. Not good.

Then again, you've probably got some idea of your ISF already and whether you are sensitive to insulin or not. The more sensitive you are, the more substantial .5 of a unit might be as a determining factor - for someone really sensitive it might be viable to do it this way.

Here's my example: A unit only drops me about 20 mg/dl, half a unit would only drop me about 10 mg/dl, it would be very hard to pick up that drop over the few hours I'd need to test it. Given tester inacuracies and all the other factors, the smaller numbers involved would make this pretty untenable as a diagnostic tool.

I worked out my ISF through trial and error with real correction needs, but it ended up being very close to what you get with the 1800 Rule and Correction Factor (http://www.diabetesnet.com/diabetes_control_tips/corr_factor.php)

[psilocybin]

My 1800 rule - 4.1
.5 units drop me 2.2

[Subby]

Ah, there you go, I was being too clever by converting to mg/dl when we both use mmol/l...

In my example, .5 would only drop me .5 mmol/l, which I would find pretty hard to pick up on. Whereas, it seems you are sensitive enough for the .5 unit to be more meaningful and possibly a useful result. Is it correct compared to the "rule" result? Who knows. The real question is... does it work for you? Try it out and see.

[psilocybin]

I drop more from 1 unit at different times of day to which sucks

[poodlebone]

I drop more from 1 unit at different times of day to which sucks

Can't you set different ISFs for different times of day in your pump?

[psilocybin]

Ya I can

Just a pain trying to figure em all out

[MJM]

Insulin Sensitivity Factor can be got by those on mmol/l, by dividing 100 by TDD (Total Daily Dose). For those on mg/dl divide 1800 by TDD. This info is from the book 'Pumping Insulin'.