Data/hora: 04/06/2024 15:24:41

Provedor de dados: | 65
País: | Brazil
Título: | Cardiac index by thermodilution or transthoracic echocardiography in dogs at different hemodynamic states
Autores: | Gehrcke,Martielo Ivan; Cardoso,Helena Mondardo; Regalin,Doughlas; Silva,Gizelli da; Padilha,Vanessa Sasso; Moraes,Aury Nunes de; Oleskovicz,Nilson.
Data: | 2016-11-01
Ano: | 2016
Palavras-chave: | Cardiac index; Hypotension; Echocardiography; Bland-altman.
Resumo: | ABSTRACT: Proper monitoring of cardiac index (CI) in critically ill patients requires accurate and minimally invasive methods. The aim of this study was to compare the CI values obtained by thermodilution or echocardiography using different methods in dogs in different hemodynamic states. Nine dogs weighing 19.6±1.3kg were anesthetized with isoflurane at 1.4V% (Baseline) and subjected to mechanical ventilation (MV),a hypodynamic state (Hypo) with isoflurane at 3.5V% and hyperdynamic state (hyper) with dobutamine infusion at 5μgkg-1min-1. CI analysis was performed by thermodilution (TD) and using the modified Simpson's method, aortic velocity-time integral (A-VTI) method and pulmonary VTI (P-VTI) method. We performed Pearson's correlation and Bland-Altman analysis. The CI values (Lm-2min-1) of the animals in the Baseline, MV, Hypo and Hyper states were 4.3±1, 3.6±0.7, 2.9±0.66 and 6.1±2, for TD; 2.8±0.7, 2.4±0.3, 1.7±0.7 and 4.4±1.2, for Simpson's method; 3.4±0.9, 3.1±0.7, 2.6±3.4, 6.1±1.8 for A-VTI; and 3.6±0.8, 3.6±0.8, 2.7±0.6 and 6.2±1.5, for P-VTI. The CI values using Simpson's method were lower than those obtained by TD in all states, and it was observed a significant correlation in the Hypo (r=0.89) and Hyper (r=0.76) groups. In addition,the percent error in the Hypo group using Simpson's method was 26% relative to TD, which allowed for the identification of the different hemodynamic states. With respect to the other methods and states, there was no agreement or correlation between the methods and TD. We concluded that none of the tested echocardiography methods exhibited acceptable agreement with thermodilution at different hemodynamic states.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001102049
Editor: | Universidade Federal de Santa Maria
Relação: | 10.1590/0103-8478cr20150352
Formato: | text/html
Fonte: | Ciência Rural  v.46 n.11 2016
Fonte: | info:eu-repo/semantics/openAccess