NCT07451405

The Effect of Oscillation and Lung Expansion (OLE) Therapy in Prolonged Mechanical Ventilated Patients With Atelectasis Evaluated in Multiple Methods

The Efficacy of Oscillation and Lung Expansion (OLE) Therapy Evaluated by Compterized Tomography (CT) and Electrical Impedance Tomography（EIT）in Prolonged Mechanical Ventilated Patients With Atelectasis: A Multicenter Randomized Contralled Trial

• Status: Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 60 (estimated)
• Sponsor: Capital Medical University · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

High frequency chest wall oscillation (HFCWO) is currently one of the most common and widespread mechanical airway clearance techniques (ACTs) in clinical practice in China. As an external airway oscillation technique, it has been proven in previous clinical practices that it can help clear secretions by vibrating the chest wall, loosening the secretions adhering to the airway walls and promoting ciliary movement, thereby improving lung ventilation and re-expansion. However, there are still some groups of patients for whom this technique is not suitable in clinical practice, such as those who are uncomfortable with the oscillation, have damaged skin on the chest and back, have unstable rib fractures, or have poorly positioned tracheostomy tubes. In recent years, integrating multiple techniques into a single treatment has become a trend. Among them, oscillation and lung expansion (OLE) combines continuous positive airway pressure (CPAP), continuous high-frequency oscillation (CHFO), and nebulization, which can effectively clear airway secretions and promote lung re-expansion. Currently, only a few studies have confirmed that OLE has a positive impact on improving respiratory function in patients with acute respiratory failure, severe burns, and after lung surgery. This study aims to further compare the effects of the above two mechanical ACTs on improving lung ventilation and re-expansion by electrical impedance tomography (EIT), and optimize the clinical practice of physical therapists.

Conditions

• Atelectasis

Interventions

Type	Name	Description
OTHER	High frequency chest wall oscillation or other airway clearance therapy	High frequency chest wall oscillation (HFCWO) is an external airway oscillation technique, it has been proven in previous clinical practices that it can help clear secretions by vibrating the chest wall, loosening the secretions adhering to the airway walls and promoting ciliary movement, thereby improving lung ventilation and re-expansion. We will give the patients HFCWO twice a day and each time we will give them 15HZ as frequency and 20mins as time. Other therapies are postural drainage, manual vibration...
OTHER	Oscillation and lung expansion	oscillation and lung expansion (OLE) combines continuous positive airway pressure (CPAP), continuous high-frequency oscillation (CHFO), and nebulization, which can effectively clear airway secretions and promote lung re-expansion. The OLE will be given to the patients twice a day as well, and each time 10mins therapy with 2.5mins CPAP and 2.5mins CHFO cirsularly.

Timeline

• Start date: 2026-03-15
• Primary completion: 2026-04-01
• Completion: 2026-10-01
• First posted: 2026-03-05
• Last updated: 2026-03-05

Locations

2 sites across 1 country: China