Effects of intravenous glucose loading on oxygen consumption, carbon dioxide production, and resting energy expenditure in infants with bronchopulmonary dysplasia

Measurements of oxygen consumption and carbon dioxide production were made by the Haldane open circuit method on hereditarily obese mice and littermate controls, and the energy expenditures were estimated. Studies were made on mice for short periods under ‘basal’ conditions, and for periods of approximately a day with the mice fasted and confined, fasted and relatively unconfined, and fed and unconfined. The total energy expenditures of fed and unconfined obese mice were found to be higher than those of nonobese littermate controls by virtue of a) increased ‘basal metabolism’, b) greater energy expenditure associated with feeding, and possibly c) larger energy output for activity despite reduced voluntary movement. The values obtained for total metabolism confirm those previously determined by an isotope method for measuring CO2 output.

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Comparison of three methods of determining oxygen consumption and resting energy expenditure

The Journal of the American Osteopathic Association ◽

10.1515/jom-1989-890107 ◽

1989 ◽

Vol 89 (1) ◽

pp. 43-48

Author(s):

Brian J. Walsh ◽

Thomas F. Morley

Keyword(s):

Oxygen Consumption ◽

Energy Expenditure ◽

Resting Energy Expenditure ◽

Resting Energy

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Combined heart rate and activity improve estimates of oxygen consumption and carbon dioxide production rates

Journal of Applied Physiology ◽

10.1152/jappl.1996.81.4.1754 ◽

1996 ◽

Vol 81 (4) ◽

pp. 1754-1761 ◽

Cited By ~ 38

Author(s):

Jon K. Moon ◽

Nancy F. Butte

Keyword(s):

Carbon Dioxide ◽

Heart Rate ◽

Oxygen Consumption ◽

Energy Expenditure ◽

Carbon Dioxide Production ◽

Alternative Methods ◽

Prediction Errors ◽

Nonlinear Functions ◽

Production Rates ◽

Basal Energy Expenditure

Moon, Jon K., and Nancy F. Butte. Combined heart rate and activity improve estimates of oxygen consumption and carbon dioxide production rates. J. Appl. Physiol.81(4): 1754–1761, 1996.—Oxygen consumption (V˙o 2) and carbon dioxide production (V˙co 2) rates were measured by electronically recording heart rate (HR) and physical activity (PA). Mean daily V˙o 2 andV˙co 2 measurements by HR and PA were validated in adults ( n = 10 women and 10 men) with room calorimeters. Thirteen linear and nonlinear functions of HR alone and HR combined with PA were tested as models of 24-h V˙o 2 andV˙co 2. Mean sleepV˙o 2 andV˙co 2 were similar to basal metabolic rates and were accurately estimated from HR alone [respective mean errors were −0.2 ± 0.8 (SD) and −0.4 ± 0.6%]. The range of prediction errors for 24-h V˙o 2 andV˙co 2 was smallest for a model that used PA to assign HR for each minute to separate active and inactive curves (V˙o 2, −3.3 ± 3.5%; V˙co 2, −4.6 ± 3%). There were no significant correlations betweenV˙o 2 orV˙co 2 errors and subject age, weight, fat mass, ratio of daily to basal energy expenditure rate, or fitness. V˙o 2,V˙co 2, and energy expenditure recorded for 3 free-living days were 5.6 ± 0.9 ml ⋅ min−1 ⋅ kg−1, 4.7 ± 0.8 ml ⋅ min−1 ⋅ kg−1, and 7.8 ± 1.6 kJ/min, respectively. Combined HR and PA measured 24-h V˙o 2 andV˙co 2 with a precision similar to alternative methods.

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