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A user facility reported to olympus that during use of the single use preloaded sphinctertome v, which was preloaded with a visiglide, the cutting wire on the papillotome broke.The patient was undergoing a papillotomy for an unknown indication.The event occurred specifically during the cutting process while electricity was utilized.There was a delay of 15 minutes while the papillotome was exchanged via the wire system; the procedure was then finished successfully.Additional anesthesia was given but no injury occurred.Additional information was requested; if received, a supplement will be sent.
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This report is being supplemented to provide additional information based on the legal manufacturer's final investigation, the device evaluation, and corrections to d4 and g2.The device was returned to olympus for inspection, and the customer's complaint was confirmed.The coated portion of the cutting wire was torn, and the broken portion was scorched and melted.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, probable causes for the broken cutting wire include: 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.Additionally, it¿s likely the torn coating of the cutting wire was due to the slider that was slightly pushed causing the cutting wire to deflect.The coated portion of the cutting wire likely rubbed due to the effect of contacting a metal area of the endoscope.However, a final root cause of these events was unable to be identified.The following is included in the instructions for use: ¿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.Be sure that the rear end of the cutting wire is extended from the distal end of the endoscope.In case the cutting wire contacts the forceps elevator, insufficient output or unintended tissue injury may occur.When activating output, set the output mode of the electrosurgical unit to ¿cut¿ or ¿blend¿.Activating output in the ¿coagulation¿ mode could break the cutting wire.Do not activate output when the distal end of the endoscope is too close to or in contact with body cavity tissue.This could burn the tissue and/or damage the endoscope.¿ olympus will continue to monitor field performance for this device.
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