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Determination of the basal metabolic rate of humans with a whole-body calorimeter

  • US 4,386,604 A
  • Filed: 02/27/1981
  • Issued: 06/07/1983
  • Est. Priority Date: 02/27/1981
  • Status: Expired due to Fees
First Claim
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1. A whole-body calorimeter for use in obtaining data for calculating the basal metabolic rate of a human subject, comprising,means presenting a chamber for enclosing the subject to be measured,a base on which the subject can recline in said chamber,an inlet for admitting ambient air into said chamber,an air outlet,said chamber being substantially sealed except for said inlet and outlet,means for establishing a constant, known flow of ambient external air through said chamber from said inlet to said outlet, said flow being discharged to atmosphere,means for measuring the temperature of air external to said chamber, the temperature of air entering said chamber by said inlet, and the temperature of air leaving said chamber by said outlet,means for measuring the relative humidity of air in said chamber, anda heat source comprising an electric heater of known heat output within said chamber for heating air in said chamber at a known energy input rate when no subject is present, in order to calibrate heat losses through the walls of said chamber from said heat source when no subject is present in the chamber, said heat source being inactive when the subject is present in said chamber.

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