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

Model Number	30001004101110012
Medical Device Problem Code	Pacing Problem (1439)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	02/02/2026
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 while attempting to treat a patient (age & gender unknown), the device displayed a "pacer fault 124" error message and the pacer output was out of specification.Complainant indicated that there was no adverse effect to the patient due to the reported malfunction.
Additional Manufacturer Narrative
The device was returned to zoll medical corporation for evaluation.Device logs for the reported event date of 02/02/26 were reviewed and showed no pacing activity.On 02/03/26, pacing activity was present along with multiple pd core warnings (251 and 75) and pacer warning 124, indicating a potential fault in the pacing circuit with zero pace current detected.The device underwent functional testing and passed all tests without issue, including successful pacing using test accessories.Internal inspection revealed no abnormalities.The pace/defib engine was replaced as a precaution.The device was recertified and returned to the customer.Analysis of reports of this type has not identified an increase in trend.

• Brand Name: R 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: 24427494
• Report Number: 1220908-2026-00527
• Device Sequence Number: 9730799
• Product Code: MKJ
• UDI-Device Identifier: 00847946017439
• UDI-Public: (01)00847946017439
• Combination Product (Y/N): N
• Initial Reporter State: PA
• 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): 02/03/2026

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: 30001004101110012
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Date Returned to Manufacturer: 02/19/2026
• 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: 02/03/2026
• Supplement Date Received by Manufacturer: Not provided
• Initial Report FDA Received Date: 02/24/2026
• Supplement Report FDA Received Date: 04/03/2026
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 05/01/2018
• 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