O. Thom, D. M. Taylor, R. E. Wolfe, J. Cade, P. Myles, H. Krum, R

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Presentation transcript:

Comparison of a supra-sternal cardiac output monitor (USCOM) with the pulmonary artery catheter O. Thom, D.M. Taylor, R.E. Wolfe, J. Cade, P. Myles, H. Krum, R. Wolfe British Journal of Anaesthesia Volume 103, Issue 6, Pages 800-804 (December 2009) DOI: 10.1093/bja/aep296 Copyright © 2009 British Journal of Anaesthesia Terms and Conditions

Fig 1 Bland–Altman plot for 250 paired measurements. Reference lines indicate the mean difference between methods (bias) at −0.09 litre min−1 and the 95% LOA (2.83 to −3.01 litre min−1). British Journal of Anaesthesia 2009 103, 800-804DOI: (10.1093/bja/aep296) Copyright © 2009 British Journal of Anaesthesia Terms and Conditions

Fig 2 Percentage difference between paired measurements. Percentage difference was calculated as the difference between the two methods expressed as a percentage of the mean CO value for each data pair. Reference lines indicate acceptable LOA for percentage difference of ± 28.3%.11 British Journal of Anaesthesia 2009 103, 800-804DOI: (10.1093/bja/aep296) Copyright © 2009 British Journal of Anaesthesia Terms and Conditions

Fig 3 Tracked changes in consecutive paired measurements. Changes in CO are expressed as percentage increases or decreases compared with the previous CO measurement provided by the same method. There were 169 consecutive measurements in 65 subjects. Data points in the top left and bottom right quadrants represent tracked changes in opposite directions. British Journal of Anaesthesia 2009 103, 800-804DOI: (10.1093/bja/aep296) Copyright © 2009 British Journal of Anaesthesia Terms and Conditions