Many factors affect a person's blood volume and its relative composition.
Volumes are based on body weight calculations (mL per kg body weight).
Effect of Age on Intravascular Volumes
under 18 years of age
110% of adult
90% of adult
Effect of Weight on Intravascular Volumes
weight loss, marked & within 6 months
based on original weight before loss
weight loss, gradual over longer period of time
110-115% of adult, based on current weight
obese with short stature
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