V. De Santis, M. Singer  British Journal of Anaesthesia 

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Tissue oxygen tension monitoring of organ perfusion: rationale, methodologies, and literature review  V. De Santis, M. Singer  British Journal of Anaesthesia  Volume 115, Issue 3, Pages 357-365 (September 2015) DOI: 10.1093/bja/aev162 Copyright © 2015 The Author(s) Terms and Conditions

Fig 1 Tissue oxygen tension ( t P O 2 ) values measured in different organs in different species. Only studies in which the inspired O2 fraction was reported to be 0.21 are included. Ranges for human brain P O 2 are reported as 3.4 (sd 0.2) kPa,2 for muscle 3.8 (0.8) kPa,3 for skin 7.2 (3.3) kPa, and for liver either 6.1 (5.8)4 or 4.1 (range 2.6–5.4) kPa.5 British Journal of Anaesthesia 2015 115, 357-365DOI: (10.1093/bja/aev162) Copyright © 2015 The Author(s) Terms and Conditions

Fig 2 The Clark polarographic technique. British Journal of Anaesthesia 2015 115, 357-365DOI: (10.1093/bja/aev162) Copyright © 2015 The Author(s) Terms and Conditions

Fig 3 Principle of electron paramagnetic resonance (EPR) spectroscopy. W, linewidth. British Journal of Anaesthesia 2015 115, 357-365DOI: (10.1093/bja/aev162) Copyright © 2015 The Author(s) Terms and Conditions

Fig 4 Dynamic fluorescence quenching. British Journal of Anaesthesia 2015 115, 357-365DOI: (10.1093/bja/aev162) Copyright © 2015 The Author(s) Terms and Conditions