Fig. 2: Changes in end-expiratory lung impedance over time.
From: Rescue nasopharyngeal tube for preterm infants non-responsive to initial ventilation after birth
a Explanation of selected timepoints and time periods. b Changes in end-expiratory lung impedance are depicted at six predefined time-points compared to each patients individual baseline. c Changes in EELI over the same duration with each of the two interfaces. * = the length of mask period and NPT period is of individual length in each patient. Abbreviations: CPAP continuous positive airway pressure, NIPPV non-invasive positive pressure ventilation, NPT nasopharyngeal tube, ΔEELI change in end-expiratory lung impedance compared to baseline, AU/kg arbitrary units per kilogram, NPT FU individual follow-up timepoint (received by adding the duration of mask period to NPT in).
