MAUDE Adverse Event Report: AOMORI OLYMPUS CO., LTD. SINGLE USE 3-LUMEN SPHINCTEROTOME V; SINGLE USE 2-LUMEN SPHINCTEROTOME

Model Number	KD-V411M-0725
Medical Device Problem Codes	Break (1069); Thermal Decomposition of Device (1071)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	03/04/2024
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
E1.Establishment name - (b)(6) hospital.The device was returned, and the evaluation found that the knife wire had broken.When the broken part was checked, it was noted that the wire coating was torn, and the broken part was burnt and melted.When the outer diameter of the knife wire was measured, no abnormalities were found.When the length of the knife wire and wire sheathing was measured, it was noted that the wire sheathing was missing approximately 6.5mm to 10.5mm from the tip side.No other abnormalities that could have led to the breakage of the know wire were confirmed.Should additional relevant information become available, a supplemental report will be submitted.
Event or Problem Description
It was reported that during therapeutic ercp (endoscopic retrograde cholangiopancreatography), when the sphincterotome was outputting high frequency signals, the wire broke on the first press.The user replaced the device with a similar product and completed the procedure.There were no reports of patient harm or impact associated with this event.
Additional 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, the root cause of the event was unable to be identified.Based on the actual product confirmation results and past investigation results, it is likely that the knife wire breakage is due to the following mechanism: 1.When the forceps stand of the endoscope was raised, the knife wire where the wire coating was torn came into contact with the tip of the endoscope.2.1.When electricity was applied in this state, the knife wire instantaneously became hot at the contact point, leading to breakage.Based on the result of confirmation of the device, and the result of past similar complaint investigation, a likely mechanism causing the cutting wire breakage might be the following.However, the exact cause could not be determined.1.The cutting wire where the wire coating was torn came into contact with the distal end of the endoscope when the forceps elevator was raised.2.Under circumstances described above 1, an electric conduction was activated.This caused the cutting wire to become hot instantly at the contact point.As a result, the cutting wire broke.It is likely that the tear in the wire coating was caused by the following factors.However, the cause could not be determined.Due to factors such as the knife wire being bent due to pushing the slider a little, the wire sheath came into contact with the metal tip of the endoscope and rubbed (see figs.2 and 3).A likely factor causing tears of the coated portion of the cutting wire might be the following.However, the exact cause could not be determined.It is possible that the slider was slightly pushed causing the cutting wire to deflect.The coated portion of the cutting wire has possibly been rubbed due to the effect of contacting a metal area of the endoscope.It is likely that the loss of the wire sheathing occurred after the wire sheathing was torn, and some kind of load, such as the load during removal from the endoscope, was applied to the torn wire sheathing, and the wire sheathing came off the knife wire.It was not possible to determine the circumstances of the occurrence.It can be inferred that some kind of force might have applied to the coated portion of the cutting wire when the device was withdrawn from endoscope after the coated portion of the cutting wire has torn.This might have caused the coated portion of the cutting wire to detach from the cutting wire.As a result, the coated portion was partially missing.However, the exact cause of the reported event could not be identified.The event can be detected/prevented by following the instructions for use which state: "the knife wire needs to be very thin, so if the length of contact with the duodenal papilla is short, if the high frequency output is high, if electricity is applied while it is in contact with the metal part of the endoscope, or if it is stretched too tightly.The knife wire may break.If the knife wire breaks, if force is applied in the direction of tensioning the knife wire, the proximal portion of the cut knife wire will be pulled toward the endoscope, and force will be applied in the direction of pushing the knife wire.If it is, it will be pushed towards the nipple or bounce to the side.If the knife wire breaks, immediately stop energizing it, pull the slider on the operating section completely, pull the cut knife wire into the tube, and then immediately pull out this product from the nipple.A broken knife wire can lead to perforation, major bleeding, laceration of the bile duct, and damage to the endoscope.When inserting or removing this product from the endoscope, pull the slider slightly and move the knife wire along the curve of the tube.If the forceps base of the endoscope is moved back and forth with the knife wire bent, the metal part of the forceps base may come into contact with the knife wire and scrape the coating.Do not apply electricity to a torn or scratched wire sheath while it is in contact with tissue.If current is applied to a torn or scratched wire sheath while it is in contact with tissue, current may leak, resulting in decreased output or unintended tissue burns.If you feel that the product is not sharp when energizing it, pull out this product from the endoscope and check that there is no damage such as tears or scratches on the wire sheathing.This instruction manual contains the following information.(drawing no.Gk6224 revision no.9).Since the cutting wire is very thin, it may break off in the following cases: the distance between the papilla of vater and the cutting wire is very short, the output is too high or activated while the cutting wire touches metal parts of the endoscope, or the cutting wire is tightened too strong.When the cutting wire breaks off, its proximal end will be retracted toward the endoscope if the slider is pulled.If the slider is pushed, the cutting wire will be pushed out toward the papilla or move sideways.If the cutting wire breaks off, stop the output immediately and pull the slider completely to retract the broken cutting wire into the tube.Then withdraw the sphincterotome from the papilla.Otherwise, patient injury, such as perforations, bleeding, or lacerations within the biliary duct, and/or damage of the endoscope could result.When inserting the instrument into the endoscope, be sure that the cutting wire is parallel to the tube.Otherwise, the metal part of the forceps elevator may contact the cutting wire and peel off the coating material.Do not activate output while tissue is in contact with the torn or damaged coated portion of the distal end.If output is activated while tissue is contacting the torn or damaged coated portion due to insertion into or withdrawal from an endoscope, leakage current, decreased output, and/or thermal injury could result.If you feel the cutting is blunt, withdraw the device from the scope to examine if there is any peel off and tear at the coating portion." olympus will continue to monitor field performance for this device.

• Brand Name: SINGLE USE 3-LUMEN SPHINCTEROTOME V
• Common Device Name: SINGLE USE 2-LUMEN SPHINCTEROTOME
• 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: 18899134
• Report Number: 9614641-2024-00649
• Device Sequence Number: 7683032
• Product Code: KNS
• UDI-Device Identifier: 04953170382635
• UDI-Public: 04953170382635
• Combination Product (Y/N): N
• Initial Reporter Country: JA
• PMA/510(K) Number: K950166
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Other,Foreign,Health Professional,User Facility,Company Representative
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date (Section B): 04/10/2024

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: KD-V411M-0725
• Device Lot Number: 37V
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Date Returned to Manufacturer: 03/11/2024
• Is the Reporter a Health Professional?: Yes
• Was the Report Sent to FDA?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 03/04/2024
• Supplement Date Received by Manufacturer: 04/01/2024
• Initial Report FDA Received Date: 03/13/2024
• Supplement Report FDA Received Date: 04/10/2024
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 07/20/2023
• 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: VIO: HIGH-FREQUENCY ABLATION POWER SUPPLY DEVICE
• Patient Sex: Unknown