Head C A, McManus C B, Seitz S, Grossman G D, Staton G W, Heymsfield S B
JPEN J Parenter Enteral Nutr. 1984 Jan-Feb;8(1):45-8. doi: 10.1177/014860718400800145.
An indirect calorimetry system was assembled from three readily available major components: a digital pneumotachograph, an oxygen analyzer, and a carbon dioxide analyzer. A one-way valve, face mask, and meteorological balloon completed the system. Accuracy was assessed by comparison to direct calorimetry in hospitalized patients undergoing enteral hyperalimentation. Each subject was on continuous infusion of formula during a 7-day metabolic balance. Direct and indirect calorimetry was performed over the last 4 days of the balance. The overall agreement between the two methods was within 1%. A simple and inexpensive calorimetry system can therefore be assembled to provide an accurate measure of resting energy expenditure.
数字式呼吸流速计、氧气分析仪和二氧化碳分析仪。一个单向阀、面罩和气象气球完善了该系统。通过与接受肠内高营养的住院患者的直接测热法进行比较来评估准确性。在为期7天的代谢平衡期间，每位受试者持续输注配方食品。在平衡期的最后4天进行直接和间接测热。两种方法之间的总体一致性在1%以内。因此，可以组装一个简单且廉价的测热系统来准确测量静息能量消耗。
