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Contents
# frozen_string_literal: true
require_dependency "renalware/clinics"
# The body surface area (BSA) of a patient calculated using DuBois/DuBois
# BSA = 0.007184 * Height^0.725 * Weight^0.425
# Resources:
# - Calculators
# - https://www.msdmanuals.com/en-gb/medical-calculators/BodySurfaceArea.htm
# - http://www.medcalc.com/body.html
module Renalware
module Clinics
class BodySurfaceArea
pattr_initialize [:weight!, :height!]
def self.calculate(weight:, height:, dp: 2)
new(weight: weight, height: height).calculate(dp: dp)
end
def calculate(dp: 2)
return if height_cm.zero?
return if weight_kg.zero?
# NB ** is ruby syntax for power of (^)
result = 0.007184 * (weight_kg**0.425) * (height_cm**0.725)
result.round(dp)
end
private
def height_cm
height.to_f * 100
end
def weight_kg
weight.to_f
end
end
end
end
Version data entries
18 entries across 18 versions & 1 rubygems