Creating an insulin sensitivity factor. note: tdd = total daily dose of insulin. 100/tdd = isf if using rapid insulin (the number of mmol that 1 unit drops glucose in 3-4 hours approx). 83/tdd= isf is using regular/toronto insulin (the number of mmol/l that 1 unit drops glucose in 3-5 hours approx). example one: teddy, tdd 33, takes rapid insulin.
