# Effect of EPAP Device on Emphysema and Lung Bullae

> **NCT04742114** · NA · UNKNOWN · sponsor: **Qilu Hospital of Shandong University** · enrollment: 200 (estimated)

## Conditions studied

- Emphysema
- Bullous Disease Lung

## Interventions

- **DEVICE:** use the face mask with Expiratory Positive Airway Pressure(EPAP).
- **DEVICE:** use the face mask without Expiratory Positive Airway Pressure(EPAP).

## Key facts

- **NCT ID:** NCT04742114
- **Lead sponsor:** Qilu Hospital of Shandong University
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** UNKNOWN
- **Start date:** 2021-07-31
- **Primary completion:** 2022-11-10
- **Final completion:** 2022-11-20
- **Target enrollment:** 200 (ESTIMATED)
- **Last updated:** 2022-03-29


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04742114

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04742114, "Effect of EPAP Device on Emphysema and Lung Bullae". Retrieved via AI Analytics 2026-06-02 from https://api.ai-analytics.org/clinical/NCT04742114. Licensed CC0.

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