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It was reported, that the single use preloaded sphincterotome.The cutting wire disengaged.The issue occurred, during an endoscopic retrograde cholangiopancreatography (ercp).For stenotic tumoral gallstones.The intended procedure was finished with a similar device.There were no reports of patient harm.
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This report is being supplemented to provide additional information based on the results of the legal manufacturer's final investigation.The device was returned to olympus for evaluation and the customers reported issue was not confirmed.The knife wire did not fall off but the cover was peeled and the knife wire was exposed.A review of the device history record found no deviations that could have caused or contributed to the reported issue.It has been over a year since the subject device was manufactured.Based on the results of the investigation, a definitive root cause could not be determined.It is likely, the slider was slightly pushed causing the cutting wire to deflect.The coated portion of the cutting wire then had possibly been rubbed due to the effect of contacting a metal area of the endoscope.The following information from the instructions for use (ifu) pertains to this event: " do not use excessive force to bend the distal end of the sphincterotome.This could damage the cutting wire.·the distal end of this instrument has been pre-curved.Curve the distal end further or in a different direction if necessary.Do not insert the instrument into the endoscope when the cutting wire is tightened.Doing so may extend the distal end of the insertion portion from the endoscope tip abruptly.This could cause patient injury, such as perforations, bleeding, or mucous membrane damage.It could also damage the endoscope and/or instrument.When inserting the instrument into the endoscope, hold the slider firmly.Otherwise, the distal end of the insertion portion may bend and could extend from the distal end of the endoscope abruptly.This could cause patient injury, such as perforations, bleeding, or mucous membrane damage.It could also damage the endoscope or instrument.Do not advance or extend the instrument abruptly.This could cause patient injury, such as perforations, bleeding, or mucous membrane damage.It could also damage the endoscope and/or instrument.When inserting the instrument into the endoscope, hold it close to the biopsy valve and keep it as straight as possible relative to the biopsy valve.Otherwise, the instrument could be damaged.Insert the instrument slowly.Abrupt insertion could damage the endoscope and/or instrument.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." olympus will continue to monitor field performance for this device.
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