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

Model Number	KD-611L
Medical Device Problem Code	Detachment of Device or Device Component (2907)
Health Effect - Clinical Code	Foreign Body In Patient (2687)
Date of Event	07/22/2025
Type of Reportable Event	Serious Injury
Event or Problem Description
It was reported that during a therapeutic septotomy procedure, the tip of the single use electrosurgical knife fell off into the patient's stomach.It was observed that the operator was using the device with a lot of energy in the cut mode.The operator looked for the tip that fell off inside the patient but could not find it.The fallen tip was not retrieved.The users reportedly were not worried about it too much.The procedure was prolonged by less than 30 minutes and completed successfully with a different knife.The patient was stable and 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.
Event or Problem Description
No additional information received from the customer.
Additional Manufacturer Narrative
This supplemental report is being submitted to provide the results of the final investigation.Updated fields: h6, h11.Based on the results of the investigation, and since the device was not returned for evaluation, the definitive root cause of the reported issue could not be determined.Should additional relevant information become available, a supplemental report will be submitted.Olympus will continue to monitor field performance for this device.

• Brand Name: SINGLE USE ELECTROSURGICAL KNIFE
• 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: 22742969
• Report Number: 9614641-2025-01346
• Device Sequence Number: 8419207
• Product Code: KNS
• UDI-Device Identifier: 04953170225963
• UDI-Public: 04953170225963
• Combination Product (Y/N): N
• Initial Reporter State: CA
• Initial Reporter Country: US
• PMA/510(K) Number: K092309
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: User Facility,Company Representative
• Initial Reporter Occupation: Other
• Type of Report: Initial,Followup
• Report Date (Section B): 11/01/2025

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: Yes
• Operator of Device: Health Professional
• Device Model Number: KD-611L
• Device Lot Number: 52K
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: No
• Type of Report(Section G): Follow-Up
• Initial Date Received by Manufacturer: 07/22/2025
• Supplement Date Received by Manufacturer: 10/17/2025
• Initial Report FDA Received Date: 08/07/2025
• Supplement Report FDA Received Date: 11/03/2025
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 02/01/2025
• 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
• Outcome Attributed to Adverse Event: Required Intervention
• Patient Sex: Unknown