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The subject device has not yet been returned for evaluation/investigation.Therefore, the root cause of the reported phenomenon could not be determined at this time.If the suspect device is returned for evaluation/investigation or additional significant information becomes available, this report will be supplemented accordingly.
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This supplemental report is being submitted to provide additional information from the customer and the results of the legal manufacturer¿s investigation and the results of the device history records (dhr) review.New information added to the following fields: b5, h4, h6, h10.Corrected data: b1, g2, h1.The dhr for this device were reviewed and all records indicated the product was manufactured according to all applicable procedures and met final product release criteria.No abnormalities were found.A definitive root cause was not identified.Based on the available information and similar complaints, the legal manufacturer determined the probable cause of the wire breakage might be due to one of the following: an electrical discharge possibly occurred, and the cutting wire became hot instantly.That have caused the cutting wire to break.·high frequency current was conducted between the cutting wire and the distal end of the endoscope at the point of contact or the devices being closed to each other.·high frequency current was conducted in the state of the coated portion of the cutting wire being torn, and the metal part of the forceps elevator were contacted while the forceps elevator was up.In the case of ¿b¿, a likely cause of the tear of the coated portion might be the following reasons.1) the slider was pushed more than needed.That have caused the cutting wire to deflect.2) the deflected coated portion of the cutting wire, and the metal part of the forceps elevator were came into contact while the forceps elevator was up.3) the tube was moved back and forth as a state of description ¿2¿.It can be assumed that the coated portion of the wire was scratched and torn from the effect of contacting the metal part of the forceps elevator.This instruction manual contains the following information regarding the event: ¿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.¿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 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.Investigation activities have been opened to manage the actions related to this issue and any required mdr reporting.
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Additional information received from the customer: during an ercp with sphincterotomy, the surgeon had difficulty cutting.After repeated attempts to cut, the blade broke and was retrieved with an unknown instrument.The intended surgery was completed with a similar non-olympus device.The customer reported no procedural delay due to this device malfunction.
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