Detection of hypoventilation during deep sedation in patients undergoing ambulatory gynaecological hysteroscopy: a comparison between transcutaneous and.

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Detection of hypoventilation during deep sedation in patients undergoing ambulatory gynaecological hysteroscopy: a comparison between transcutaneous and nasal end- tidal carbon dioxide measurements  De Oliveira G.S. , S Ahmad, P.C. Fitzgerald, R.J. McCarthy  British Journal of Anaesthesia  Volume 104, Issue 6, Pages 774-778 (June 2010) DOI: 10.1093/bja/aeq092 Copyright © 2010 The Author(s) Terms and Conditions

Fig 1 Bland–Altman analysis of the relationship among Tcco2, Pe′co2, and Paco2. The mean difference (bias) and the limits of agreement (2 sd) are shown. The mean (2 sd) for the upper and lower graphs are: 0.23 (0.51) and −1.17 (1.0) kPa, respectively. British Journal of Anaesthesia 2010 104, 774-778DOI: (10.1093/bja/aeq092) Copyright © 2010 The Author(s) Terms and Conditions

Fig 2 Linear regression analysis of Tcco2 and Pe′co2 with Paco2. Tcco2 and Paco2 line slope (95% CI) equals 0.83 (0.62–1.03) with y-intercept (95% CI) of 1.27 (0.01–2.54) kPa. Pe′co2 and Paco2 line slope (95% CI) equals 0.26 (−0.06 to 0.58) with y-intercept (95% CI) of 3.58 (1.59–5.56) kPa. British Journal of Anaesthesia 2010 104, 774-778DOI: (10.1093/bja/aeq092) Copyright © 2010 The Author(s) Terms and Conditions

Fig 3 Vector plot of Tcco2 values vs time before arterial blood sampling. (a) The time first reaching a Ramsay sedation level of ≥5 until time of needle insertion for arterial blood sampling. (b) The time of needle insertion until completion of arterial blood sampling. British Journal of Anaesthesia 2010 104, 774-778DOI: (10.1093/bja/aeq092) Copyright © 2010 The Author(s) Terms and Conditions