Nutritional requirements of the critically ill patient

Costa, N.; Marinho, A.; Cançado, L.

Publication

Nutritional requirements of the critically ill patient

2012Journal article

dc.contributor.author	Costa, N.
dc.contributor.author	Marinho, A.
dc.contributor.author	Cançado, L.
dc.date.accessioned	2016-12-24T03:33:05Z
dc.date.available	2016-12-24T03:33:05Z
dc.date.issued	2012
dc.description.abstract	Objective: Given the inaccessibility of indirect calorimetry, intensive care units generally use predictive equations or recommendations that are established by international societies to determine energy expenditure. The aim of the present study was to compare the energy expenditure of critically ill patients, as determined using indirect calorimetry, to the values obtained using the Harris-Benedict equation. Methods: A retrospective observational study was conducted at the Intensive Care Unit 1 of the Centro Hospitalar do Porto. The energy requirements of hospitalized critically ill patients as determined using indirect calorimetry were assessed between January 2003 and April 2012. The accuracy (± 10% difference between the measured and estimated values), the mean differences and the limits of agreement were determined for the studied equations. Results: Eighty-five patients were assessed using 288 indirect calorimetry measurements. The following energy requirement values were obtained for the different methods: 1,753.98±391.13 kcal/ day (24.48 ± 5.95 kcal/kg/day) for indirect calorimetry and 1,504.11 ± 266.99 kcal/day (20.72±2.43 kcal/kg/day) for the HarrisBenedict equation. The equation had a precision of 31.76% with a mean difference of -259.86 kcal/day and limits of agreement between -858.84 and 339.12 kcal/day. Sex (p=0.023), temperature (p=0.009) and body mass index (p< 0.001) were found to significantly affect energy expenditure Conclusion: The Harris-Benedict equation is inaccurate and tends to underestimate energy expenditure. In addition, the Harris-Benedict equation is associated with significant differences between the predicted and true energy expenditure at an individual level	pt_PT
dc.description.version	info:eu-repo/semantics/publishedVersion	pt_PT
dc.identifier.citation	Rev Bras Ter Intensiva. 2012; 24(3):270-277	pt_PT
dc.identifier.issn	1982-4335
dc.identifier.uri	http://hdl.handle.net/10400.16/2020
dc.language.iso	eng	pt_PT
dc.peerreviewed	yes	pt_PT
dc.publisher	Associação de Medicina Intensiva Brasileira	pt_PT
dc.relation.publisherversion	file:///C:/Documents%20and%20Settings/f00067/Ambiente%20de%20trabalho/en_v24n3a11.pdf	pt_PT
dc.subject	Indirect calorimetry	pt_PT
dc.subject	Diet therapy	pt_PT
dc.subject	Nutritional therapy	pt_PT
dc.subject	Energy metabolism	pt_PT
dc.subject	Respiration artificial	pt_PT
dc.subject	Intensive care units	pt_PT
dc.title	Nutritional requirements of the critically ill patient	pt_PT
dc.title.alternative	Necessidades nutricionais do doente crítico	pt_PT
dc.type	journal article
dspace.entity.type	Publication
oaire.citation.conferencePlace	Brazil	pt_PT
oaire.citation.endPage	277	pt_PT
oaire.citation.issue	3	pt_PT
oaire.citation.startPage	270	pt_PT
oaire.citation.title	Revista Brasileira de Terapia Intensiva	pt_PT
oaire.citation.volume	24	pt_PT
rcaap.rights	openAccess	pt_PT
rcaap.type	article	pt_PT