# A40 Expiratory Flow Limitation Registry

> **NCT04419428** · — · WITHDRAWN · sponsor: **Philips Clinical & Medical Affairs Global**

## Conditions studied

- Chronic Obstructive Pulmonary Disease

## Interventions

- **DEVICE:** BiPAP A40 Expiratory Flow Limitation (EFL)

## Key facts

- **NCT ID:** NCT04419428
- **Lead sponsor:** Philips Clinical & Medical Affairs Global
- **Sponsor class:** INDUSTRY
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** WITHDRAWN
- **Start date:** 2024-02
- **Primary completion:** 2025-09
- **Final completion:** 2025-09
- **Target enrollment:** 0 (ACTUAL)
- **Why stopped:** Philips placed the study on hold in August 2022 due to the awareness of a potential device functionality issue. Philips has shifted business priorities and has decided to cancel the trial.
- **Last updated:** 2024-01-19


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04419428

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04419428, "A40 Expiratory Flow Limitation Registry". Retrieved via AI Analytics 2026-05-28 from https://api.ai-analytics.org/clinical/NCT04419428. Licensed CC0.

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