The measurement of energy expenditure
- PMID: 16215161
- DOI: 10.1177/0115426504019006622
The measurement of energy expenditure
Abstract
Proper nutrition support depends upon the clinician's ability to estimate the patient's energy expenditure. The accuracy of estimation is inversely proportional to the severity of the patient's illness. This fact has spurred academic and industry groups to pursue the measurement of energy expenditure. Harris and Benedict used indirect calorimetry to develop their now-famous equation nearly 100 years ago. The concept of indirect calorimetry is simple; if you know the concentration of inspired gases and expired gases, along with the flow, you can determine the amount of a gas consumed or produced. The complexity and expense of indirect calorimeters suggest that this simple concept is technically challenging. Because we desire to know the energy expenditure of the most critically ill patients, indirect calorimetry is further confounded by the presence of oxygen and mechanical ventilation. This paper will discuss the myriad of variables and obstacles that complicate the measurement of energy expenditure and will suggest methods to avoid or overcome them.
Similar articles
-
Accurate determination of energy needs in hospitalized patients.J Am Diet Assoc. 2007 Mar;107(3):393-401. doi: 10.1016/j.jada.2006.12.014. J Am Diet Assoc. 2007. PMID: 17324656
-
Comparison of measured versus predicted energy requirements in critically ill cancer patients.Respir Care. 2009 Apr;54(4):487-94. Respir Care. 2009. PMID: 19327184
-
A comparison between ventilation modes: how does activity level affect energy expenditure estimates?JPEN J Parenter Enteral Nutr. 2008 Mar-Apr;32(2):176-83. doi: 10.1177/0148607108314761. JPEN J Parenter Enteral Nutr. 2008. PMID: 18407911
-
Determining energy needs in critically ill patients: equations or indirect calorimeters.Curr Opin Crit Care. 2012 Apr;18(2):174-7. doi: 10.1097/MCC.0b013e3283514bbc. Curr Opin Crit Care. 2012. PMID: 22322264 Review.
-
Indirect calorimetry: methodology, instruments and clinical application.Curr Opin Clin Nutr Metab Care. 2006 May;9(3):247-56. doi: 10.1097/01.mco.0000222107.15548.f5. Curr Opin Clin Nutr Metab Care. 2006. PMID: 16607124 Review.
Cited by
-
Total daily energy expenditure is increased following a single bout of sprint interval training.Physiol Rep. 2013 Oct;1(5):e00131. doi: 10.1002/phy2.131. Epub 2013 Oct 24. Physiol Rep. 2013. PMID: 24303194 Free PMC article.
-
Indirect Calorimetry in Critically Ill Patients With COVID-19: More Questions Than Answers.JPEN J Parenter Enteral Nutr. 2021 Aug;45(6):1139-1140. doi: 10.1002/jpen.2054. Epub 2020 Dec 16. JPEN J Parenter Enteral Nutr. 2021. PMID: 33242351 Free PMC article. No abstract available.
-
Classical experiments in whole-body metabolism: closed-circuit respirometry.Eur J Appl Physiol. 2017 Oct;117(10):1929-1937. doi: 10.1007/s00421-017-3681-2. Epub 2017 Jul 26. Eur J Appl Physiol. 2017. PMID: 28748369 Review.
-
Ventilator-derived carbon dioxide production to assess energy expenditure in critically ill patients: proof of concept.Crit Care. 2015 Oct 22;19:370. doi: 10.1186/s13054-015-1087-2. Crit Care. 2015. PMID: 26494245 Free PMC article.
-
Metabolic and nutritional aspects in continuous renal replacement therapy.J Intensive Med. 2023 Jan 30;3(3):228-238. doi: 10.1016/j.jointm.2022.11.001. eCollection 2023 Jul 31. J Intensive Med. 2023. PMID: 37533807 Free PMC article. Review.
LinkOut - more resources
Full Text Sources
