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

Model Number HX-400U-30

Device Problems Activation, Positioning or Separation Problem (2906); Material Twisted/Bent (2981); Physical Resistance/Sticking (4012)

Patient Problem No Clinical Signs, Symptoms or Conditions (4582)

Event Date 04/16/2023

Event Type  Injury  

Manufacturer Narrative

The exact complaint device was not returned for evaluation.Unopened/unused product was sent instead and evaluated.No abnormalities were observed in the appearance of the insertion site.The device was removed from the protective tray and the tip was shook, but the loop didn't come off the body.Next, the loop was hung on an object, and the slider was pulled.This resulted in the loop being bound.However, by pushing the slider, the loop was able to be unlocked without any problem.No unusual resistance was felt in the operation of the slider.There was no abnormality such as deformation or bending in the hook, or any other abnormalities found in the weight of the handle.The event was unable to be confirmed or reproduced.The investigation is ongoing.A supplemental report will be submitted upon completion of the investigation.

Event Description

A user facility reported to olympus that while using a single use ligating device during a colon polypectomy, after ligating the lesion, the loop could not be released.The physician had to cut the sheath; the loop tip then loosened and the stalk was released.It was also stated that the operation pipe of the slider was bent, and the handle felt heavier than usual.The procedure was completed, and no health hazards occurred to the patient.

Manufacturer Narrative

This report is being supplemented to provide additional information based on the legal manufacturer's final investigation.A review of the device history record found no deviations that could have caused or contributed to the reported issue.Based on the results of the investigation, although the root cause could not be determined, the reported event was likely caused by the following mechanism: 1) the loop was surrounding the body tissue, and it was temporarily ligated by pulling the slider.2) the tube sheath was pushed out, and the distal end of the coil sheath went into the tube sheath.3) an attempt was made to detach the loop in the state of above description 2).Therefore, the loop detached from the hook in the tube.4) while the hook was extending from the coil sheath, the loop moved towards the proximal side and went into the coil sheath.5) the hook was pulled.This caused the hook and the loop to retract into the coil sheath together.As a result, the loop and the hook got stuck inside the coil and could not move.6) since the loop and the hook got stuck together inside the coil, the loop did not detach when the slider was pulled.7) the slider was forcibly operated.This had caused the operating pipe to bend.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 ¿emergency treatment¿ and as shown ¿equipment to be used in an emergency¿ 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 remove.In this case, refer to ¿emergency treatment¿ and as shown ¿equipment to be used in an emergency¿ 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 remove.In this case, refer to ¿emergency treatment¿ and as shown ¿equipment to be used in an emergency¿ in this manual.¿ ¿never use excessive force to operate the instrument.This could damage the instrument.¿ this supplemental report includes a correction to g2 to provide information that was inadvertently not included in the initial medwatch.Olympus will continue to monitor field performance for this device.

• Brand Name: SINGLE USE LIGATING DEVICE
• Type of Device: 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: 16935346
• MDR Text Key: 315277450
• Report Number: 9614641-2023-00670
• Device Sequence Number: 1
• Product Code: FHN
• UDI-Device Identifier: 04953170368615
• UDI-Public: 04953170368615
• Combination Product (y/n): N
• Reporter Country Code: JA
• PMA/PMN Number: CLASS2-EXMPT
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: Other,Foreign,User Facility,Company Representative,Distributor
• Reporter Occupation: Non-Healthcare Professional
• Type of Report: Initial,Followup
• Report Date: 06/07/2023

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 05/15/2023
• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: Yes
• Device Operator: Health Professional
• Device Model Number: HX-400U-30
• Device Lot Number: 22K
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Date Returned to Manufacturer: 04/27/2023
• Was the Report Sent to FDA?: No
• Date Manufacturer Received: 06/02/2023
• Was Device Evaluated by Manufacturer?: Yes
• Date Device Manufactured: 02/06/2022
• Is the Device Single Use?: Yes
• Is This a Reprocessed and Reused Single-Use Device?: No
• Type of Device Usage: Initial
• Patient Sequence Number: 1
• Patient Outcome(s): Required Intervention