Figure 4
From: Investigation of non-uniform airflow signal oscillation during high frequency chest compression
(a) The airflow and (b) the oesophageal pressure measured by Fink et al. [6] (modified with the permission), which shows typical respiratory airflow during use of HFCC. The positive numbers of airflow rate represent inspiration and the negative numbers represent expiratory airflow. Oesophageal pressure reflects the intrapleural pressure (P pl ) that is altered by HFCC pulses (tiny peaks).