SponTaneous Respiration using IntraVEnous anaesthesia and Hi-flow nasal oxygen (STRIVE Hi) maintains oxygenation and airway patency during management.

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Anesthes. 2017;126(1): doi: /ALN Figure Legend:

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SponTaneous Respiration using IntraVEnous anaesthesia and Hi-flow nasal oxygen (STRIVE Hi) maintains oxygenation and airway patency during management of the obstructed airway: an observational study A.W.G. Booth, K Vidhani, P.K. Lee, C.-M. Thomsett British Journal of Anaesthesia Volume 118, Issue 3, Pages 444-451 (March 2017) DOI: 10.1093/bja/aew468 Copyright © 2017 The Author(s) Terms and Conditions

Fig 1 Endoscopic appearance of 3 mm diameter subglottic stenosis in a patient anaesthetized with STRIVE Hi. British Journal of Anaesthesia 2017 118, 444-451DOI: (10.1093/bja/aew468) Copyright © 2017 The Author(s) Terms and Conditions

Fig 2 The relationship between the duration of spontaneous respiration during the induction phase and oxygen saturation levels (n = 30). British Journal of Anaesthesia 2017 118, 444-451DOI: (10.1093/bja/aew468) Copyright © 2017 The Author(s) Terms and Conditions

Fig 3 A comparison of oxygen saturations throughout the different phases of spontaneous ventilation showing the effect of varying the inspired oxygen concentration (FiO2) during the maintenance phase. Box plot shows median and first and third quartiles. Vertical extensions indicate minimum and maximum observed measurements. British Journal of Anaesthesia 2017 118, 444-451DOI: (10.1093/bja/aew468) Copyright © 2017 The Author(s) Terms and Conditions

Fig 4 The relationship between the overall duration of spontaneous respiration and end-tidal (and in five patients arterial, as indicated by the blue circles) carbon dioxide (n = 29). The line represents linear regression with r = 0.091. British Journal of Anaesthesia 2017 118, 444-451DOI: (10.1093/bja/aew468) Copyright © 2017 The Author(s) Terms and Conditions

Fig 5 Carbon dioxide levels measured at baseline and at the end of the spontaneous ventilation period. Black lines indicate end-tidal measurements (n = 12). Blue lines indicate serial arterial blood gas measurements (n = 5). The red line indicates the mean overall (end-tidal + arterial) rate of increase of carbon dioxide (0.03 kPa.min−1). British Journal of Anaesthesia 2017 118, 444-451DOI: (10.1093/bja/aew468) Copyright © 2017 The Author(s) Terms and Conditions