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iron said:When the patient got fat, her lungs didn't get bigger. Hence set tidal volume toward ideal body weight (surrogate for lung size) instead of true body weight.
We dose many drugs to body weight but not all. Dosing to body weight on induction agents would probably lead to overdoses. There are drug delivery systems in use in Europe that dose drugs to target concentrations taking in to account volume of distribution and the like. In the US, it's more of an academic discussion, "How much propofol should I give this woman with a BMI of 50?"
One stick.