There was no significant change in spirometry values (FEV1 or FVC) with HFCWO baseline FEV1 1.05 (SD 0.37) versus postintervention FEV1 1.07 (SD 0.38) L or in the conventional phase (baseline FEV1 0.97 [SD 0.37]) versus postintervention (FEV1 1.01 [SD 0.36] L, P = not significant), as shown in Figure 2.
HFCWO (SmartVest®) device
4 weeks in a conventional phase with a 2-week washout
Sputum expectoration