MAUDE Adverse Event Report: PULMONX CORPORATION ZEPHYR ENDOBRONCHIAL VALVE (EBV)

Model Number	ZEPHYR VALVE 4.0 LP
Medical Device Problem Code	Adverse Event Without Identified Device or Use Problem (2993)
Health Effect - Clinical Code	Pneumothorax (2012)
Date of Event	08/13/2025
Type of Reportable Event	Serious Injury
Event or Problem Description
On (b)(6) 2025 the patient who received a valve placement on (b)(6) 2025 experienced a pneumothorax.The pneumothorax was moderate in size and a chest tube was placed on (b)(6) 2025.The chest tube was removed on (b)(6) 2025 and the patient was discharged on (b)(6) 2025.
Additional Manufacturer Narrative
Pneumothorax is the most common side effect associated with the zephyr valve treatment (criner et al.A multicenter randomized controlled trial of zephyr endobronchial valve treatment in heterogeneous emphysema (liberate).Am j respir crit care med.2018; 198 (9): 1151-1164).Targeted lobar deflation likely causes inflation of the ipsilateral lobe, which can result in a tear of the already compromised parenchymal tissue of the emphysematous ipsilateral lobe, resulting in a pneumothorax (criner et al.A multicenter randomized controlled trial of zephyr endobronchial valve treatment in heterogeneous emphysema (liberate).Am j respir crit care med.2018; 198 (9): 1151-1164).In the liberate study (ide clinical study used to support pma p180002's approval), 26.6% of the zephyr valve subjects experienced a pneumothorax in the treatment period ([less than or equal to 45 days).These were managed using standard of care procedures as per previously published guidelines (valipour, arschang, et al.Respiration 87.6 (2014): 513-521).In 17.4% of the events, the pneumothorax resolved without any additional intervention with subjects under careful observation.In over half the events (56.5%), the pneumothorax was managed with a chest-tube only.An additional 13% of the events were managed with a chest-tube and the temporary removal of one or more valves, while another 13% of the events were managed with a chest-tube and removal of all the implanted valves.Upon successful resolution of the pneumothorax, removed valves can be replaced.Patients that experienced a pneumothorax experienced clinical benefits of the zephyr valve treatment that were similar to the benefits experienced by patients who did not have a pneumothorax.The zephyr ebv system ifu and pulmonx training program both specifically reference pneumothorax as a known side effect of this procedure and the published guidelines (valipour, arschang, et al."expert statement: pneumothorax associated with endoscopic valve therapy for emphysema-potential mechanisms, treatment algorithm, and case examples." respiration 87.6 (2014): 513-521).The reported event aligns with the experience observed in the liberate clinical study and is an expected side effect to the zephyr valve treatment.

• Brand Name: ZEPHYR ENDOBRONCHIAL VALVE (EBV)
• Common Device Name: ENDOBRONCHIAL VALVE
• Manufacturer (Section D): PULMONX CORPORATION; 700 chesapeake drive; redwood city CA 94063
• Manufacturer Contact: leah andre ; 700 chesapeake drive; redwood city, CA 94063
• MDR Report Key: 23042484
• Report Number: 3007797756-2025-00034
• Device Sequence Number: 21352758
• Product Code: NJK
• UDI-Device Identifier: 00811907030225
• UDI-Public: (01)00811907030225(10)507089V71(17)270129
• Combination Product (Y/N): N
• Initial Reporter State: CA
• Initial Reporter Country: US
• PMA/510(K) Number: P180002
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2025
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Health Professional,User Facility,Company Representative
• Initial Reporter Occupation: Non-Healthcare Professional
• Remedial Action: Patient Monitoring
• Type of Report: Initial
• Report Date (Section B): 09/12/2025

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: No
• Device Model Number: ZEPHYR VALVE 4.0 LP
• Device Catalogue Number: EBV-TS-4.0-LP
• Device Lot Number: 507089-V7.1
• Was Device Available for Evaluation?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 08/14/2025
• Initial Report FDA Received Date: 09/12/2025
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 01/29/2024
• Is the Device Labeled for Single Use? (Y/N): Yes
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Usage of Device: Initial
• Patient Sequence Number: 1
• Outcome Attributed to Adverse Event: Required Intervention
• Patient Sex: Unknown