MAUDE Adverse Event Report: AOMORI OLYMPUS CO., LTD. SINGLE USE ELECTROSURGICAL KNIFE KD-655

Model Number	KD-655U
Medical Device Problem Code	Detachment of Device or Device Component (2907)
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 tip on the electrosurgical knife fell off.The reported issue was discovered during a therapeutic procedure when the knife was removed from the working channel.The knife was set aside and a new knife was used to complete the procedure.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.
Additional Manufacturer Narrative
This report is being supplemented to provide additional information regarding the final investigation.The device was not returned to olympus for inspection, therefore, the customer's reported issue could not be confirmed.Based on the results of the investigation, a definitive root cause could not be determined as the device was not returned.Olympus will continue to monitor field performance for this device.
Event or Problem Description
No additional information received from customer.

• Brand Name: SINGLE USE ELECTROSURGICAL KNIFE KD-655
• Common Device Name: SINGLE USE ELECTROSURGICAL KNIFE
• Manufacturer (Section D): AOMORI OLYMPUS CO., LTD.; 2-248-1 okkonoki; kuroishi-shi, aomori 036-0 357; JA 036-0357
• Manufacturer (Section G): AOMORI OLYMPUS CO., LTD.; 2-248-1 okkonoki; kuroishi-shi, aomori 036-0 357; JA 036-0357
• Manufacturer Contact: todd brill ; 800 west park drive; westborough, MA 01581 ; 5082077661
• MDR Report Key: 21944091
• Report Number: 9614641-2025-00642
• Device Sequence Number: 15733726
• Product Code: KNS
• UDI-Device Identifier: 04953170377532
• UDI-Public: 04953170377532
• Combination Product (Y/N): N
• PMA/510(K) Number: K171158
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Foreign,Health Professional,User Facility
• Initial Reporter Occupation: Nurse
• Type of Report: Initial,Followup
• Report Date (Section B): 05/22/2025

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: KD-655U
• Device Lot Number: 51K
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Follow-Up
• Initial Date Received by Manufacturer: 04/04/2025
• Supplement Date Received by Manufacturer: 05/02/2025
• Initial Report FDA Received Date: 05/01/2025
• Supplement Report FDA Received Date: 05/22/2025
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 01/01/2025
• Is the Device Labeled for Single Use? (Y/N): Yes
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Usage of Device: Initial
• Patient Sequence Number: 1
• Patient Sex: Unknown