MAUDE Adverse Event Report: GYRUS ACMI, INC. THUNDERBEAT 5 MM, 45 CM, FRONT-ACTUATED GRIP TYPE S; ULTRASONIC SURGICAL DEVICE

Model Number	TB-0545FCS
Medical Device Problem Code	Break (1069)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	12/12/2025
Type of Reportable Event	Malfunction
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
The customer reported that, early on in a therapeutic colorectal resection procedure, the pad of their thunderbeat device became loose after seal activation.The customer finished the procedure with a replacement olympus device, and the procedure was completed successfully.There were no reports of patient harm.
Additional Manufacturer Narrative
Updated d1, d4.
Additional Manufacturer Narrative
This supplemental report is being submitted to provide the results of the final investigation.The device was returned to olympus for inspection, and the reported failure was confirmed.In addition, the following reportable malfunctions were identified during the device evaluation: the tissue pad was peeled off.A definitive root cause could not be identified.Based on the results of the investigation, it is likely the following led to the malfunction: stress appears to be linked to the reported issue.Olympus will continue to monitor field performance for this device.

• Brand Name: THUNDERBEAT 5 MM, 45 CM, FRONT-ACTUATED GRIP TYPE S
• Common Device Name: ULTRASONIC SURGICAL DEVICE
• Manufacturer (Section D): GYRUS ACMI, INC.; 9600 louisiana avenue north; brooklyn park MN 55445
• Manufacturer (Section G): GYRUS ACMI, INC.; 9600 louisiana avenue north; brooklyn park MN 55445
• Manufacturer Contact: todd brill ; 800 west park drive; westborough, MA 01581 ; 5082077661
• MDR Report Key: 23885048
• Report Number: 3011050570-2025-01502
• Device Sequence Number: 11930055
• Product Code: GEI
• UDI-Device Identifier: 04953170409684
• UDI-Public: 04953170409684
• Combination Product (Y/N): N
• Initial Reporter Country: UK
• PMA/510(K) Number: K211838
• 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,Followup
• Report Date (Section B): 05/01/2026

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: TB-0545FCS
• Device Lot Number: KR394799
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Initial
• Initial Date Received by Manufacturer: 12/12/2025
• Supplement Date Received by Manufacturer: 03/11/2026; 04/29/2026
• Initial Report FDA Received Date: 12/23/2025
• Supplement Report FDA Received Date: 04/06/2026; 05/01/2026
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• 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