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

Model Number	630-2241112-01
Medical Device Problem Code	Incorrect Interpretation of Signal (1543)
Health Effect - Clinical Code	Insufficient Information (4580)
Date of Event	01/04/2026
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
Zoll medical corporation has not received the device for evaluation and this complaint is still under investigation.
Event or Problem Description
Complainant alleged that while attempting to defibrillate a patient (age & gender unknown), the device issued a "shock advised" prompt for a heart rhythm they believed was non-shockable.Complainant did not indicate that there was any adverse effect to the patient due to the reported malfunction.
Additional Manufacturer Narrative
The device was not returned to zoll medical corporation for evaluation; however, the data file was provided for review.Analysis of the data confirmed no device malfunction, and the device operated as designed during the event.Review of impedance data indicated ongoing chest movement consistent with cpr being performed during analysis periods, which likely interfered with rhythm interpretation.The complaint is closed as meets device specification.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: 24521693
• Report Number: 1220908-2026-00693
• Device Sequence Number: 9746427
• Product Code: MKJ
• UDI-Device Identifier: 00847946029654
• UDI-Public: (01)00847946029654
• Combination Product (Y/N): N
• Initial Reporter State: GA
• 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): 02/12/2026

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: 630-2241112-01
• Was Device Available for Evaluation?: No
• 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: 02/12/2026
• Supplement Date Received by Manufacturer: Not provided
• Initial Report FDA Received Date: 03/05/2026
• Supplement Report FDA Received Date: 04/14/2026
• Was Device Evaluated by Manufacturer? (Y/N): Device Not Returned to Manufacturer
• Date Device Manufactured: 03/01/2023
• 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