Article Figures & Data
Figures
- Fig. 1.
Flow chart. HFNC = high-flow nasal cannula, EIT = electrical impedance tomography.
- Fig. 2.
Ventilation distribution at different study phases. The last minute of EIT data from each phase is presented. In the tidal variation images, highly ventilated regions are coded in light blue. Pixel values are relative impedance in arbitrary units, and the same scale is applied to all 4 panels. In the end-expiratory lung impedance images, regions with high end-expiratory lung volume are coded in red. Pixel values are relative impedance in arbitrary units, and the same scale is applied to all 4 panels. VC-CMV = volume-controlled continuous mandatory ventilation; HFNC = high-flow nasal cannula; head-up tilt = 45° head-up tilt with conventional O2; AU = arbitrary units; EIT = electrical impedance tomography.
- Fig. 3.
Comparison of EELI during conventional O2 therapy, HFNC therapy, and 45° head-up tilt in the ventral (A) and dorsal regions (B) of the lungs. Horizontal lines show the mean EELI in the corresponding phase. * P < .05 between conventional O2 and HFNC therapy; ** P < .001 between conventional O2 and head-up tilt and between HFNC therapy and head-up tilt. EELI = end-expiratory lung impedance; HFNC = high-flow nasal cannula.
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