Pulmonary Medicine / 2012 / Article / Fig 3

Clinical Study

Pulmonary Function Tests in Emergency Department Pediatric Patients with Acute Wheezing/Asthma Exacerbation

Figure 3

Pneumotachography measurements. (a) End-tidal CO2 pattern in an admitted 12-year-old patient enrolled in our study. Note the rise in end-tidal CO2 during the last portion of expiration (no clear plateau was observed). (b) End-tidal CO2 pattern of a control subject (from our pulmonary function test laboratory archives) demonstrating the plateau of normal CO2 waveform.