MAUDE Adverse Event Report: Nihon Kohden Corporation ZM-531PA; Telemetry Transmitter

Model Number	ZM-531PA
Medical Device Problem Codes	Application Program Problem (2880); Power Problem (3010); Complete Loss of Power (4015); Unintended Application Program Shut Down (4032)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	04/15/2026
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
The biomedical engineer (biomed) reported that the zm transmitter would power off and enter a boot loop cycle after about 20 minutes of operation.This was found at setup and there was no patient involvement.The device exhibited the same symptoms when testing it in his biomed shop.Nihon kohden continues to investigate the reported event.Nihon kohden will submit a supplemental report in accordance with 21 cfr section 803.56 when additional information becomes available.
Event or Problem Description
The biomedical engineer (biomed) reported that the zm transmitter would power off and enter a boot loop cycle after about 20 minutes of operation.No patient harm was reported.

• Brand Name: ZM-531PA
• Common Device Name: Telemetry Transmitter
• Manufacturer (Section D): Nihon Kohden Corporation; attn: shama mooman; 1-31-4 nishiochia; shinjuku-ku, tokyo 161-8 560; JA 161-8560
• Manufacturer (Section G): Nihon Kohden Tomioka Corporation; attn: shama mooman; 1-1 tajino; tomioka city, gunma 370-2 314; JA 370-2314
• Manufacturer Contact: shama mooman ; seibu bldg 2, 4th floor 1-11-2; kusunokidai tokorozawa, saitama 359-8-580 ; JA 359-8580
• MDR Report Key: 25086547
• Report Number: 8030229-2026-06584
• Device Sequence Number: 18775749
• Product Code: DRT
• UDI-Device Identifier: 04931921115107
• Combination Product (Y/N): N
• Initial Reporter State: PA
• Initial Reporter Country: US
• PMA/510(K) Number: K043517
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: User Facility
• Initial Reporter Occupation: Biomedical Engineer
• Type of Report: Initial,Followup
• Report Date (Section B): 07/24/2026

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: Health Professional
• Device Model Number: ZM-531PA
• Device Catalogue Number: ZM-531PA
• Was Device Available for Evaluation?: No
• Date Returned to Manufacturer: 05/05/2026
• 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: 04/15/2026
• Supplement Date Received by Manufacturer: 07/08/2026
• Initial Report FDA Received Date: 05/05/2026
• Supplement Report FDA Received Date: 07/27/2026
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 02/13/2025
• 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
• Concomitant Medical Products and Therapy/Usage Dates: NA.
• Patient Sex: Unknown