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

Model Number HX-400U-30

Device Problem Mechanical Problem (1384)

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

Event Type  malfunction  

Event Description

A nurse at the user facility reported that while using the subject device in a therapeutic colon polypectomy, the loop could not be released after ligation, so the wire was cut with a loop cutter and released.The procedure was completed using a similar device.There was no patient injury reported due to the event.

Manufacturer Narrative

The subject device was returned to olympus for evaluation.The product was sent with the loop still inside.The loop stopper was at the end of the coil sheath.There was no problem with the actuator.When the loop stopper was removed, the loop was pulled, but it did not come out.When the coil sheath was extended and the hook and loop were checked, the loop had detached from the hook and was wedged between the coil sheath.The end of the loop had been cut off with a loop cutter.A crushed mark was left at the rear end of the loop.There were no other abnormalities observed that may have led to the event.The investigation is ongoing; therefore, a root cause of the reported event cannot be determined at this time.If additional information becomes available, this report will be supplemented accordingly.

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, it¿s likely the proximate side of the loop was temporarily retracted into the coil sheath, and the loop was caught in between the coil sheath and the hook.This prevented the slider from moving and the loop could not be detached from the coil sheath.Under these circumstances, the slider was forcefully operated and as a result, the operating pipe was bent and broken.Additionally, probable causes for the detachment fault of the loop mechanism include: 1) the loop was detached from the hook while the coil sheath was being retracted into the tube sheath, or the loop was hung on to the tissue and it was positionally fixed at the distal end of the tube.As a result, the loop was unable to release.2) the tube sheath was pulled toward the proximate side while the hook was extended from the distal end of the coil sheath.3) since the tube sheath was pulled toward the proximate side, causing the tube to pull the loop.This caused the loop to retract into the coil sheath.As a result, the loop was caught in between the hook and inner surface of the coil, and the loop stopped moving.However, a final root cause of this event was unable to be identified.The following is included in the instructions for use: ¿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.¿ 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 Contact: masaharu hirose ; 2-248-1 okkonoki; kuroishi-shi, aomori 036-0-357 ; JA 036-0357 ; 426422891
• MDR Report Key: 15606077
• MDR Text Key: 307261843
• Report Number: 9614641-2022-00477
• 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,Health Professional,User Facility,Company Representative,Distributor
• Reporter Occupation: Nurse
• Type of Report: Initial,Followup
• Report Date: 11/16/2022

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 10/14/2022
• Is this an Adverse Event Report?: No
• Is this a Product Problem Report?: Yes
• Device Operator: Health Professional
• Device Model Number: HX-400U-30
• Device Lot Number: 1YK
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Date Returned to Manufacturer: 09/29/2022
• Is the Reporter a Health Professional?: Yes
• Was the Report Sent to FDA?: No
• Date Manufacturer Received: 10/24/2022
• Was Device Evaluated by Manufacturer?: Yes
• Date Device Manufactured: 11/15/2021
• 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