MAUDE Adverse Event Report: ZOLL MEDICAL CORPORATION X SERIES; DEFIBRILLATOR/PACEMAKER

Model Number	630-2221111-01
Medical Device Problem Code	Pacing Problem (1439)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
Zoll medical corporation has received the product and will be providing a supplemental report when our investigation is completed.
Event or Problem Description
Complainant alleged that during biomed testing, the device displayed a "pacer fault" message.Complainant indicated that there was no patient involvement in the reported malfunction.
Event or Problem Description
Complainant alleged that while attempting to treat a patient (age & gender unknown), the device displayed a "pacer fault" message.Complainant did not indicate that there was any adverse effect to the patient due to the reported malfunction.
Additional Manufacturer Narrative
This supplemental medwatch report is reporting the evaluation of the device and correcting information submitted on the initial medwatch report.Please reference section a1, a4, b5, b6, and b7.The device was returned to zoll medical corporation for evaluation, and the reported pacing failure could not be duplicated during testing using known good accessories and simulation equipment.Review of the device data logs identified the device recorded pacing ecg and multi-lead ecg faults, which may be related to poor lead contact, accessory issues, or cable connections.The accessories were not returned for evaluation.Proper skin preparation remains important to ensure good electrode adhesion and signal quality.The device was extensively tested and passed successfully including pacing simulation and capture.The device was recertified and returned to the customer.Analysis for reports of this type has not identified an increase in trend.

• Brand Name: X SERIES
• Common Device Name: DEFIBRILLATOR/PACEMAKER
• Manufacturer (Section D): ZOLL MEDICAL CORPORATION; 269 mill road; chelmsford MA 01824
• Manufacturer Contact: scott august ; 269 mill road; chelmsford, MA 01824 ; 9784219552
• MDR Report Key: 23777071
• Report Number: 1220908-2025-04590
• Device Sequence Number: 10170344
• Product Code: MKJ
• UDI-Device Identifier: 00847946029524
• UDI-Public: (01)00847946029524
• Combination Product (Y/N): N
• Initial Reporter State: TX
• Initial Reporter Country: US
• PMA/510(K) Number: P160022
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Initial Reporter Occupation: Other
• Type of Report: Initial,Followup
• Report Date (Section B): 11/24/2025

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: No
• Is this a Product Problem Report?: Yes
• Operator of Device: Other
• Device Model Number: 630-2221111-01
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Date Returned to Manufacturer: 12/03/2025
• Is the Reporter a Health Professional?: No
• Was the Report Sent to FDA?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 11/24/2025
• Supplement Date Received by Manufacturer: Not provided
• Initial Report FDA Received Date: 12/11/2025
• Supplement Report FDA Received Date: 02/05/2026
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 06/01/2021
• Is the Device Labeled for Single Use? (Y/N): No
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Usage of Device: Reuse
• Patient Sequence Number: 1
• Patient Sex: Unknown