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- W2770635513 abstract "Abstract Whole room indirect calorimeter ( WRIC ) validation techniques consist of propane combustion ( PC ) or infusion of mixed carbon dioxide ( CO 2 ) and nitrogen (N 2 ) by a precision blender ( PB ). To determine the best method, PC of 6, 10, 22‐h and PB infusions of 6, 10, and 14‐h, were conducted. The 14‐h infusion consisted of two metabolic settings. Energy expenditure ( EE ; kJ ), ventilation (V; liters/min) of oxygen ( VO 2 ), VCO 2 , and respiratory quotient ( VCO 2 / VO 2 ) obtained from the WRIC were extrapolated to the respective test durations and compared to similarly calculated values. Moreover, accurate equations ( AE ) were derived to correct infusions for additional N 2 . As a final evaluation of a PC validated WRIC , weight maintenance ( WM ), energy balance ( EB ), respiratory quotient (RQ), and food quotients ( FQ ) were determined in 22 subjects who had repeat 24‐h EE measurements. Statistical analyses ( P < 0.05) were conducted ( SPSS , version 23). Significant differences in RQ existed between PC and stoichiometry after 6‐h. Errors for the rest of the PC tests ranged from −1.5 ± 2.4 ( VCO 2 ) to 2.8 ± 4.6% ( EE ). When compared with the WRIC , all uncorrected metabolic parameters for six and 10‐h PB infusions were significantly different with errors from −12.8 ± 1.6 ( VO 2 ) to 6.0 ± 2.8% ( RQ ). The AE reduced the magnitude of errors to −12.4 ± 1.5 ( RQ ) to 2.2 ± 3.0% ( RQ ). The PB infusion with two settings showed similar performance. No differences in WM , EB , RQ , or FQ existed in the subjects. In conclusion, 10‐h PC tests are sufficient for validating WRIC s." @default.
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- W2770635513 date "2017-11-01" @default.
- W2770635513 modified "2023-10-06" @default.
- W2770635513 title "Validation of whole room indirect calorimeters: refinement of current methodologies" @default.
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- W2770635513 doi "https://doi.org/10.14814/phy2.13521" @default.
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