MAUDE Adverse Event Report: NIHON KOHDEN CORPORATION JB-110A; FULL-MONTAGE STANDARD ELECTROENCEPHALOGRAPH

Model Number	JB-110A
Medical Device Problem Codes	Incorrect, Inadequate or Imprecise Result or Readings (1535); Output Problem (3005)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	10/24/2025
Type of Reportable Event	Malfunction
Event or Problem Description
The customer reported that ekg is misreading, the ekg is missing the p wave.There was no patient injury reported.
Additional Manufacturer Narrative
The customer reported that ekg is misreading, the ekg is missing the p wave.There was no patient injury reported.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.

• Brand Name: JB-110A
• Common Device Name: FULL-MONTAGE STANDARD ELECTROENCEPHALOGRAPH
• 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: 23605681
• Report Number: 8030229-2025-05741
• Device Sequence Number: 18456375
• Product Code: GWQ
• UDI-Device Identifier: 04931921108383
• UDI-Public: (01)04931921108383
• Combination Product (Y/N): N
• Initial Reporter State: NC
• Initial Reporter Country: US
• 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
• Report Date (Section B): 11/20/2025

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: Health Professional
• Device Model Number: JB-110A
• Device Catalogue Number: JB-110A
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 10/24/2025
• Initial Report FDA Received Date: 11/20/2025
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 03/11/2024
• 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