To Assess the Effectiveness of Three Distinct Mechanical Assisted Sputum Evacuation Apparatuses in the Treatment of Patients With Mechanical Ventilation-induced Atelectasis

During mechanical ventilation, patients with atelectasis confirmed by chest CT, chest X-ray or lung ultrasound should be treated with mechanical assisted sputum evacuation, and the mechanical assisted sputum evacuation equipment used is CVT.

During mechanical ventilation, patients with atelectasis confirmed by chest CT, chest X-ray or lung ultrasound should be treated with mechanical assisted sputum evacuation, and the mechanical assisted sputum evacuation equipment used is HFCWO.

During mechanical ventilation, patients with atelectasis confirmed by chest CT, chest X-ray or lung ultrasound should be treated with mechanical assisted sputum evacuation, and the mechanical assisted sputum evacuation equipment used is MetaNeb.