Perfusion index derived from a pulse oximeter can predict the incidence of hypotension during spinal anaesthesia for Caesarean delivery S Toyama, M Kakumoto,

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Perfusion index derived from a pulse oximeter can predict the incidence of hypotension during spinal anaesthesia for Caesarean delivery S Toyama, M Kakumoto, M Morioka, K Matsuoka, H Omatsu, Y Tagaito, T Numai, M Shimoyama British Journal of Anaesthesia Volume 111, Issue 2, Pages 235-241 (August 2013) DOI: 10.1093/bja/aet058 Copyright © 2013 The Author(s) Terms and Conditions

Fig 1 The correlation between baseline PI and the degree of decrease in SAP during spinal anaesthesia for Caesarean delivery [% SAP decrease=(baseline SAP–lowest SAP)/baseline SAP] (r=0.664, P<0.0001). The solid line represents the linear regression line and the dotted lines represent the 95% CIs. British Journal of Anaesthesia 2013 111, 235-241DOI: (10.1093/bja/aet058) Copyright © 2013 The Author(s) Terms and Conditions

Fig 2 ROC curves for the baseline PI during spinal anaesthesia for Caesarean delivery. The optimal cut-off value for predicting the incidence of hypotension in PI was 3.5. AUC, area under the ROC curve, with 95% CIs given in parentheses. British Journal of Anaesthesia 2013 111, 235-241DOI: (10.1093/bja/aet058) Copyright © 2013 The Author(s) Terms and Conditions

Fig 3 Summary of the changes in SAP (a), MAP (b), HR (c), and PI (d) from baseline (BL) through 15 min after the induction of spinal anaesthesia (SP). Data are presented as mean (sd). Time, minutes after spinal injection. xP<0.05 vs the group's baseline value; +P<0.05 for parturients with baseline PI>3.5 vs those with baseline PI≤3.5; vs P<0.01 for parturients with baseline PI>3.5 vs those with baseline PI≤3.5. British Journal of Anaesthesia 2013 111, 235-241DOI: (10.1093/bja/aet058) Copyright © 2013 The Author(s) Terms and Conditions