Development of atelectasis and arterial to end-tidal Pco2-difference in a porcine model of pneumoperitoneum C.M. Strang, T. Hachenberg, F. Fredén, G.

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Development of atelectasis and arterial to end-tidal Pco2-difference in a porcine model of pneumoperitoneum C.M. Strang, T. Hachenberg, F. Fredén, G. Hedenstierna British Journal of Anaesthesia Volume 103, Issue 2, Pages 298-303 (August 2009) DOI: 10.1093/bja/aep102 Copyright © 2009 British Journal of Anaesthesia Terms and Conditions

Fig 1 Example of computed tomography (CT) scans during anaesthesia (baseline) and during CO2-pneumoperitoneum in all groups. British Journal of Anaesthesia 2009 103, 298-303DOI: (10.1093/bja/aep102) Copyright © 2009 British Journal of Anaesthesia Terms and Conditions

Fig 2 Plot of Pa-e′co2 vs atelectasis in all groups. The linear regression analysis resulted in the equation Y=0.06X+0.66, r2=0.92. A good correlation was seen when all data were pooled. Separate regression equations for data obtained during anaesthesia before and during CO2-pneumoperitoneum, respectively, did not differ from the overall regression and are not shown. British Journal of Anaesthesia 2009 103, 298-303DOI: (10.1093/bja/aep102) Copyright © 2009 British Journal of Anaesthesia Terms and Conditions

Fig 3 Plot of Pao2/Fio2 vs atelectasis in all groups. The linear regression analysis resulted in the equation Y=55.6X–1.47, r2=0.40. No significant correlation was seen during CO2-PP when all data were pooled. Separate regression analysis of Pao2/Fio2 vs atelectasis during CO2-PP showed even poorer correlation (r2=0.36). British Journal of Anaesthesia 2009 103, 298-303DOI: (10.1093/bja/aep102) Copyright © 2009 British Journal of Anaesthesia Terms and Conditions