G. E. Kuhnle, C. Hornuss, M. Lenk, A. P. Salam, D. Wiepcke, V

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Presentation transcript:

Impact of propofol on mid-latency auditory-evoked potentials in children†  G.E. Kuhnle, C. Hornuss, M. Lenk, A.P. Salam, D. Wiepcke, V. Edelmann-Gahr, G. Flake, M. Daunderer, M. Oberhauser, H.-H. Müller, M. Feuerecker  British Journal of Anaesthesia  Volume 110, Issue 6, Pages 1001-1009 (June 2013) DOI: 10.1093/bja/aet002 Copyright © 2013 The Author(s) Terms and Conditions

Fig 1 Peak latencies Na, Pa, Nb, and P1 at different conditions; multiple adjusted P-values after closed testing using the Page test and the Wilcoxon signed-rank test. Symbols for statistical significance: *indicates comparison with the 0 µg ml−1 group, #with the 3 µg ml−1 group, †with the 6 µg ml−1 group, and §with the 9 µg ml−1 group. One symbol reflects a P-value of <0.05, two symbols a P-value of <0.01, and three symbols a P-value of <0.001. Owing to the applied measuring system, the upper limit was set at 100 ms; therefore, peak latencies Nb and P1 experience an artificial ceiling effect at propofol concentrations of 6 and 9 µg ml−1. British Journal of Anaesthesia 2013 110, 1001-1009DOI: (10.1093/bja/aet002) Copyright © 2013 The Author(s) Terms and Conditions

Fig 2 Original MLAEP curves of an 11-yr-old boy. British Journal of Anaesthesia 2013 110, 1001-1009DOI: (10.1093/bja/aet002) Copyright © 2013 The Author(s) Terms and Conditions

Fig 3 Comparison of the peak latency differences Na/Pa, Pa/Nb, and Nb/P1 at different conditions; multiple adjusted P-values after closed testing using the Page test and the Wilcoxon signed-rank test. Symbols for statistical significance: *indicates comparison with the 0 µg ml−1 group, #with the 3 µg ml−1 group, †with the 6 µg ml−1 group, and §with the 9 µg ml−1 group. One symbol reflects a P-value of <0.05, two symbols a P-value of <0.01, and three symbols a P-value of <0.001. As the upper measuring limit was set at 100 ms, peak latency difference Nb/P1 experienced for propofol concentrations of 6 and 9 µg ml−1 an artificial ceiling effect. British Journal of Anaesthesia 2013 110, 1001-1009DOI: (10.1093/bja/aet002) Copyright © 2013 The Author(s) Terms and Conditions

Fig 4 MLAEP peak latencies Na, Pa, and Nb in correlation with propofol plasma concentration; sigmoidal dose–response model, curve fitted. Owing to the applied measuring system, the upper limit was set at 100 ms; therefore, peak latencies Nb and P1 experience an artificial ceiling effect at propofol concentrations of 6 and 9 µg ml−1. British Journal of Anaesthesia 2013 110, 1001-1009DOI: (10.1093/bja/aet002) Copyright © 2013 The Author(s) Terms and Conditions

Fig 5 MLAEP differences in amplitudes, Na/Pa, and Pa/Nb in correlation with propofol plasma concentration; sigmoidal dose–response model, curve fitted. As the upper measuring limit was set at 100 ms, peak latency difference Nb/P1 experienced for propofol concentrations of 6 and 9 µg ml−1 an artificial ceiling effect. British Journal of Anaesthesia 2013 110, 1001-1009DOI: (10.1093/bja/aet002) Copyright © 2013 The Author(s) Terms and Conditions

Fig 6 Modified AEP index: (a) box-plots of the modified AEP index at the respective propofol target concentrations; (b) measured plasma concentrations in correlation with the modified AEP index. Symbols for statistical significance: *indicates comparison with the 0 µg ml−1 group, #with the 3 µg ml−1 group, †with the 6 µg ml−1 group, and §with the 9 µg ml−1 group. One symbol reflects a P-value of <0.05, two symbols a P-value of <0.01, and three symbols a P-value of <0.001. British Journal of Anaesthesia 2013 110, 1001-1009DOI: (10.1093/bja/aet002) Copyright © 2013 The Author(s) Terms and Conditions