E. Weiss, E. Gayat, V. Dumans-Nizard, M. Le Guen, M. Fischler

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Presentation transcript:

Use of the Nexfin™ device to detect acute arterial pressure variations during anaesthesia induction E. Weiss, E. Gayat, V. Dumans-Nizard, M. Le Guen, M. Fischler British Journal of Anaesthesia Volume 113, Issue 1, Pages 52-60 (July 2014) DOI: 10.1093/bja/aeu055 Copyright © 2014 The Author(s) Terms and Conditions

Fig 1 Flow chart. Each stored AP value represents an average of all AP values measured over the previous 5 s period. British Journal of Anaesthesia 2014 113, 52-60DOI: (10.1093/bja/aeu055) Copyright © 2014 The Author(s) Terms and Conditions

Fig 2 Four-quadrant concordance analysis on trending ability of changes in SAP (a) and DAP (b) measured by Nexfin™ against radial artery catheter. British Journal of Anaesthesia 2014 113, 52-60DOI: (10.1093/bja/aeu055) Copyright © 2014 The Author(s) Terms and Conditions

Fig 3 Box plot representation of time-lags between the two methods to reach nadir and peak values. British Journal of Anaesthesia 2014 113, 52-60DOI: (10.1093/bja/aeu055) Copyright © 2014 The Author(s) Terms and Conditions

Fig 4 Bland–Altman graphical representation of agreement for individual values of ΔAP nadir and ΔAP peak between invasive and non-invasive measurements during induction of general anaesthesia. (a) Agreement of the ΔAP nadir values and (b) agreement of ΔAP peak values. The green continuous line represents the bias and the dashed pink lines the upper and lower LOA, respectively. Dashed green lines represent LOA recommended by AAMI for validation of NIAP devices. British Journal of Anaesthesia 2014 113, 52-60DOI: (10.1093/bja/aeu055) Copyright © 2014 The Author(s) Terms and Conditions

Fig 5 Bland–Altman for repeated measurement graphical representation of agreement between the two methods over all pairs of measurements. The green continuous line represents the bias and the dashed pink lines the upper and lower LOA, respectively. Dashed green lines represent LOA recommended by AAMI for validation of NIAP devices. British Journal of Anaesthesia 2014 113, 52-60DOI: (10.1093/bja/aeu055) Copyright © 2014 The Author(s) Terms and Conditions

Fig 6 Polar plot with 30° limits analysis on trending ability nadir changes (ΔAP nadir, blue points) and peak changes (ΔAP peak, green points) of SAP and DAP. As suggested by Critchley and colleagues,21 we drew the 30° radial sector lines, which provide envelopes within which most of the data points should lie if acceptable trending ability exists. British Journal of Anaesthesia 2014 113, 52-60DOI: (10.1093/bja/aeu055) Copyright © 2014 The Author(s) Terms and Conditions