MAUDE Adverse Event Report: Olympus Winter & Ibe GmbH Berlin Facility HF unit "ESG-400"; Electrosurgical generator ESG-400

Model Number	WB91051W
Medical Device Problem Code	Communication or Transmission Problem (2896)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Type of Reportable Event	Malfunction
Event or Problem Description
It was reported that the electrosurgical generator esg-400 diathermy immediately displays error e433 upon startup, and the image would turn on and off.The issue occurred during preparation for use.There were no reports of patient harm.
Additional Manufacturer Narrative
The investigation is ongoing.A supplemental report will be submitted when the investigation is completed or if additional information becomes available.

• Brand Name: HF unit "ESG-400"
• Common Device Name: Electrosurgical generator ESG-400
• Manufacturer (Section D): Olympus Winter & Ibe GmbH Berlin Facility; rheinstrasse 8; teltow, brandenburg 14513 ; GM 14513
• Manufacturer (Section G): Olympus Winter & Ibe GmbH Berlin Facility; rheinstrasse 8; teltow, brandenburg 14513 ; GM 14513
• Manufacturer Contact: todd brill ; 800 west park drive; westborough, MA 01581 ; +1(508)207-7661
• MDR Report Key: 50835269
• Report Number: 3003724334-2026-00492
• Device Sequence Number: 13323989
• Product Code: GEI
• UDI-Device Identifier: 04042761076838
• UDI-Public: 04042761076838
• Combination Product (Y/N): N
• Initial Reporter Country: PL
• PMA/510(K) Number: K203682
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Foreign,User Facility
• Initial Reporter Occupation: Administrator/Supervisor
• Type of Report: Initial
• Report Date (Section B): 09/21/2026

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: WB91051W
• Was Device Available for Evaluation?: Yes
• Date Returned to Manufacturer: 09/02/2026
• Is the Reporter a Health Professional?: No
• Initial Date Received by Manufacturer: 08/26/2026
• Initial Report FDA Received Date: 09/21/2026
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 08/23/2018
• 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: Unknown
• Patient Sequence Number: 1
• Patient Sex: Unknown