Pulmonary Medicine / 2012 / Article / Tab 2

Clinical Study

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

Table 2

Summarized and statistical data for pulmonary function tests (PFT).

Predicted mean (SEM)Admitted ( ) mean (SD)Discharged ( ) mean (SD)* value

LBI1.01 (0.01)1.27 (0.10)1.08 (0.05)0.04
Phase angle (°)15.7 (4.0)55.5 (43.1)35.2 (28.3)0.04
PhRTB (%)10.1 (1.8)32.4 (12.1)28.5 (12.1)0.17
Asthma score**n/a4.3 (0.9)3.1 (1.5)0.005

Predicted average (Range)Admitted ( ) mean (SD)Discharged ( ) mean (SD)* value

ETCO2 (mmHG)40 (35–45)34.1 (4.5)35.2 (3.7)0.2
Tidal volume (mL/kg)9 (7–10)4.7 (1.8)ξ4.6 (2.0)ξ0.43
Minute ventilation (L)7 (5–8)3.9 (1.2)4.1 (1.5)0.3
/ 0.41 (0.05)0.21 (0.09)0.20 (0.08)0.36
/ n/a1.01 (0.25)1.0 (0.10)0.44

LBI: labored breathing index; PhRTB: phase relation during total breath; ETCO2: end-tidal CO2; : time to peak tidal expiratory flow; : total expiratory time; : volume at peak tidal expiratory flow; : expired tidal volume. * value comparing the admitted versus discharged patients; one-tailed -test. ** value comparing the admitted versus discharged patients; two-tailed t-test ( ). ξ value comparing admitted and discharged patients to predicted controls; two-tailed -test, ( ). Predicted values based on known healthy controls .