MAUDE Adverse Event Report: AOMORI OLYMPUS CO., LTD. SINGLE USE LIGATING DEVICE

Model Number	HX-400U-30
Medical Device Problem Code	Difficult to Remove (1528)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	02/02/2024
Type of Reportable Event	Serious Injury
Event or Problem Description
It was reported, during the middle of the colonoscopy screening, the endoloop ligating device was secured to the polyp and was unable to be released, and had to be cut with loop cutters.The cable and the handle were saved, however the cable snapped inside the handle, but outside of the patient.The issue caused a 45-minute procedural delay while the patient was under conscious sedation.The procedure was completed with the same device.
Additional Manufacturer Narrative
The device was not returned.Should additional relevant information become available, a supplemental report will be submitted.This report has been submitted by the importer under this mdr report number (b)(4).
Additional Manufacturer Narrative
This report is being supplemented to provide additional information based on the legal manufacturer's final investigation and device evaluation.The device was evaluated by olympus, and it was confirmed that the manipulation wire at the handle portion of the device was severed.A review of the device history record found no deviations that could have caused or contributed to the reported issue.It has been over 2 years since the subject device was manufactured.Based on the results of the investigation, it is likely that the reported issue (unable to release the endoloop) was caused by the following mechanisms: mechanism #1: 1) the loop was placed around the body tissue.2) the tube sheath was pushed forward, and the tissue was temporarily ligated with the distal end of the tube sheath.3) the slider was pulled to tighten the loop.4) because the distal end of the coil sheath was not extended from the tube sheath when the slider was pushed, the loop disengaged from the hook inside the tube sheath.5) the hook protruded from the distal end of the coil sheath, causing the loop to move toward the handle side and enter the coil sheath.6) pulling the hook caused both the hook and the loop to be drawn into the coil sheath together.As a result, the loop became trapped between the hook and the inner surface of the coil, preventing it from moving.7) because the loop is trapped between the hook and the inner surface of the coil, pushing the slider does not release the loop.8) the slider was forcefully operated in state of ¿7¿ description causing the operating pipe of the slider to deform and break.Mechanism #2: 1) the sheath was bent near the handle.2) the operating wire could not move because sliding resistance between the sheath and the operating wire increased.3) the operating pipe deformed or broke because the slider was forcefully operated.4) due to above, the loop could not detach from the hook.The event can be detected/prevented by following the instructions for use (ifu) which state: ¿do not strike or crush the coil sheath during operation.Doing so can damage the distal end of the coil sheath, which could make it impossible to detach the loop after ligation.In this case, refer to section 12, ¿emergency treatment¿ and as shown ¿equipment to be used in an emergency¿ on page 3 in this manual.¿ ¿do not remove the loop from the hook while the coil sheath is not extended from the tube sheath.Otherwise, the loop may be tangled with the hook and become impossible to be removed.In this case, refer to section 12, ¿emergency treatment¿ and as shown ¿equipment to be used in an emergency¿ on page 3 in this manual.¿ ¿do not hold the loop with the distal end of the tube sheath while the loop is surrounding the tissue.Otherwise, when the tissue is ligated, the loop may be detached from the hook in the tube sheath and tangled with the hook.That may make the loop impossible to be removed.In this case, refer to section 12, ¿emergency treatment¿ and as shown ¿equipment to be used in an emergency¿ on page 3 in this manual.¿ ¿never use excessive force to operate the instrument.This could damage the instrument.¿ ¿straighten out the portion of the instrument that extends from the biopsy valve.¿ this supplemental report includes a correction to a2, g2, and h4 from the initial medwatch.Also, an update has been made to h3.Olympus will continue to monitor field performance for this device.

• Brand Name: SINGLE USE LIGATING DEVICE
• Common Device Name: SINGLE USE LIGATING DEVICE
• 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
• Manufacturer Contact: todd brill ; 800 west park drive; westborough, MA 01581 ; 5082077661
• MDR Report Key: 18874388
• Report Number: 9614641-2024-00635
• Device Sequence Number: 18114566
• Product Code: MND
• UDI-Device Identifier: 04953170194641
• UDI-Public: 04953170194641
• Combination Product (Y/N): N
• Initial Reporter State: CA
• Initial Reporter Country: US
• PMA/510(K) Number: CLASS2-EXMPT
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: User Facility,Company Representative
• Initial Reporter Occupation: Administrator/Supervisor
• Type of Report: Initial,Followup
• Report Date (Section B): 07/29/2024

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: HX-400U-30
• Device Lot Number: 26V
• Was Device Available for Evaluation?: No
• Was the Report Sent to FDA?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 02/12/2024
• Supplement Date Received by Manufacturer: 07/26/2024
• Initial Report FDA Received Date: 03/11/2024
• Supplement Report FDA Received Date: 07/29/2024
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 06/21/2022
• 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
• Concomitant Medical Products and Therapy/Usage Dates: SINGLE USE LOOP CUTTER FS-410U
• Outcome Attributed to Adverse Event: Required Intervention
• Patient Age: 54 YR
• Patient Sex: Male
• Patient Weight: 109 KG