Lemmens et al developed an indexed blood volume equation for obese and morbidly obese patients. The authors a re from Stanford University.


Patient selection: obese or morbidly obese



(1) body mass index (BMI) from height in meters and weight in kilograms


indexed blood volume in mL per kg =

= 70 / SQRT((BMI) / 22) =

= 70 * SQRT(22) / SQRT(BMI) =

= 328.329 / SQRT(BMI)


Figure 1 shows the line running from 10 to 70 kg per square meter.


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