An Evaluation of a Handheld Indirect Calorimeter Against a Standard Calorimeter in Obese and Nonobese Adults

Frankenfield, David C.; Coleman, Abigail

doi:10.1177/0148607112473340

Cited by 12 publications

(11 citation statements)

References 22 publications

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“…Anteriormente, cinco estudios habían reportado esta tendencia de medir un valor mayor en el consumo de oxígeno y del GER al compararlo con la CI estándar. (7,2,(28)(29)(30) Por el contrario, dos encontraron que MedGem subestima el valor estándar (31, 32) y cinco que la medición es equivalente a Deltatrac (28,(33)(34)(35).…”

Section: Discussionunclassified

“…Se siguieron las instrucciones del fabricante, que indica que tras un ayuno de 12 horas, no se requiere de la estandarización previa de alimentos ni el descarte de los primeros minutos de la prueba. Las validaciones de este equipo portátil frente a la CI fueron realizadas siguiendo estas mismas condiciones (7,12).…”

Section: Materials Y Métodosunclassified

“…El dispositivo MedGEm (Microlife USA, Golden, CO), utilizado en el presente estudio, cuenta con algunos estudios de validación contra el estándar de oro. Aunque, algunos estudios dejan ver que no siempre es equiparable, se considera una buena alternativa por su practicidad y portabilidad (7).…”

Section: Introductionunclassified

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Comparación de métodos de estimación del gasto energético en reposo en adultos jóvenes de Yucatán, México

Herrera¹,

López²,

Ramírez³

et al. 2019

Rev Biomed

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Introducción: Extrapolar ecuaciones matemáticas para la predicción del gasto energético en reposo (GER) a poblaciones diferentes a la original donde fueron desarrolladas, puede comprometer la precisión del cálculo.Objetivo: comparar diversas ecuaciones predictivas del GER contra la calorimetría indirecta (CI) para la determinación de la mejor ecuación como alternativa en adultos jóvenes universitarios en Yucatán.Material y Métodos: estudio transversal con 34 mujeres y 30 hombres (20.25 ± 1.5 años) clasificados de acuerdo a su índice de masa corporal (IMC): subgrupos sin sobrepeso y con sobrepeso. La medición del GER fue a través de un calorímetro indirecto portátil. El análisis estadístico incluyó la evaluación del sesgo con intervalos de confianza del 95%, precisión, exactitud y correlación de Pearson (P=0.01).Resultados: a pesar de la alta correlación entre las ecuaciones predictivas del GER y la CI, no fue posible identificar alguna con clara superioridad frente al resto. La ecuación de MifflinSt Jeor mostró algunas ventajas al evaluar al grupo total.Conclusión: en la práctica clínica, las ecuaciones predictivas son un instrumento útil y económico que no debe ser descartado a pesar de sus limitaciones.Palabras clave: Calorimetría indirecta. Índice de masa corporal. Evaluación nutricional. Impedancia eléctrica. Metabolismo basal. Metabolismo energético.

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Section: Discussionunclassified

Section: Materials Y Métodosunclassified

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Comparación de métodos de estimación del gasto energético en reposo en adultos jóvenes de Yucatán, México

Herrera¹,

López²,

Ramírez³

et al. 2019

Rev Biomed

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“…The VO2000 facemask (Medgraphics) was the only machine accepted based on measures coming within 5 % of those on the Deltatrac ( 12 ) . The majority of comparison studies tend to use the MedGem RMR ® , a portable calorimeter that uses a mouthpiece to measure VO 2 ; however, they report mixed conclusions ( 17 ) . Frankenfield & Coleman ( 17 ) reported that of eight portable calorimeter studies only two studies reported agreement to the Deltatrac, both reporting that this was based on there being low, non-significant differences between the machines ( 18 , 19 ) .…”

Section: Discussionmentioning

confidence: 99%

Comparison of the GEM and the ECAL indirect calorimeters against the Deltatrac for measures of RMR and diet-induced thermogenesis

et al. 2014

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The Deltatrac™ II Metabolic Monitor (Datex-Ohmeda Inc.) is considered the standard reference machine in indirect calorimetry; however, it is no longer commercially available thus there is a need for new machines. The gas exchange measurement (GEM; GEM Nutrition Ltd) and the ECAL (Health Professional Solutions) are alternative measuring systems. The aim of this study was to compare the ECAL and GEM with Deltatrac for measures of RMR and the GEM to the Deltatrac for measures of diet-induced thermogenesis (DIT). Twenty healthy participants were tested on test day 1 (T1) and test day 2 (T2). RMR was measured in a randomised order for 30 min on the Deltatrac, the GEM and the ECAL. Following this, a 1553 kJ meal was consumed and DIT was measured on the Deltatrac and the GEM in alternating 15 min intervals for 4 h. The GEM reported consistently higher values than the Deltatrac for VO2, VCO2, RMR and fat oxidation (P < 0·005). The ECAL was significantly higher than the Deltatrac for measures of VO2, RMR, carbohydrate oxidation (T2) and respiratory quotient and fat oxidation (T1, T2) (P < 0·05). There were no significant differences within repeated RMR measures on the ECAL, the GEM or the Deltatrac. DIT measures were consistently higher on the GEM (T1) (P < 0·005); however, there were no significant differences between repeated measures. The findings suggest that while the GEM and the ECAL were not accurate alternatives to the Deltatrac, they may be reliable for repeated measures.

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“…Many 2,12,21,22 state that the handheld device is valid in both adults and children, while other studies suggest that it is not valid. [23][24][25] Other portable indirect calorimeters are not handheld and use technology that is similar to the traditional indirect calorimeter (ie, mixing chamber). 15,26 This "hybrid" technology of using a mixing chamber during gas analysis within portable indirect calorimetry may provide an advantage to the handheld device.…”

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confidence: 99%

Assessing Resting Metabolic Rate in Overweight and Obese Adolescents With a Portable Indirect Calorimeter

et al. 2015

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An Evaluation of a Handheld Indirect Calorimeter Against a Standard Calorimeter in Obese and Nonobese Adults

Abstract: Measurements of resting metabolic rate by the handheld indirect calorimeter tested in this study are not equivalent to measurements by standard indirect calorimetry.

Cited by 12 publications

References 22 publications

Comparación de métodos de estimación del gasto energético en reposo en adultos jóvenes de Yucatán, México

Comparación de métodos de estimación del gasto energético en reposo en adultos jóvenes de Yucatán, México

Comparison of the GEM and the ECAL indirect calorimeters against the Deltatrac for measures of RMR and diet-induced thermogenesis

Assessing Resting Metabolic Rate in Overweight and Obese Adolescents With a Portable Indirect Calorimeter

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