Gilcher developed the "rule of fives" for estimating a patient's blood volume based on gender. body weight and body build. The author is from the Oklahoma Blood Institute.
(2) body weight
(3) body build (normal, fat, thin, muscular)
• I would think that there would be need for one for the morbidly obese.
• The rule of refers to the increments in 5 mL/kg based on body build.
• I assume that the rule applies to adults.
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