Comparison of an expiratory flow accelerator device versus positive expiratory pressure for tracheobronchial airway clearance after lung cancer lobectomy: a preliminary study.

Objective: A new type of device has recently been introduced in chest physiotherapy as an aid to tracheo-bronchial airway clearance: expiratory flow accelerator (EFA). It promotes mucus clearance without generating any pressure gradient, allowing patients to breathe at tidal volume against no resistance.

Design: Pilot randomized controlled study.