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The device was returned to olympus for evaluation and the evaluation found that the water tightness was lost due to a pinhole on the bending section cover, objective lens was shaved, light guide lens was shaved, adhesive on bending section cover had wear, insulation resistance value at distal end did not meet the standard value due to the burn on the plastic distal end cover, insulation resistance value did not meet the standard value due to the pinhole on bending section cover, and the electrical connector had a stain.The investigation is ongoing and follow up with the user facility is currently being performed.A supplemental report will be submitted upon completion of the investigation or if any additional information is provided by the user facility.
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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 is likely distal end was burnt it is likely when the user was performing high-frequency cauterization they came in contact with mucosa and did not push an endo therapy accessory out to the visible position of the green marking in sheath of the accessory and electrified without contacting electrode of an endo therapy accessory with mucosa.As a result, the distal end was burnt.However, a definitive root cause could not be determined.The following information is stated in the instructions for use (ifu): -operation manual chapter 4.3 "using endotherapy accessories" ¿ "always confirm that the tissue is an appropriate distance away from the distal end of the endoscope.If high-frequency cauterization is performed when the distal end of the endoscope contacts the tissue, patient injury, burns, bleeding, perforation, and equipment damage may occur".-2.Ifu provides the following warnings for use of laser cauterization.¿ "to avoid patient injury, burns, bleeding, perforation, and/or damage to the endoscope, never emit laser radiation before confirming that an appropriate distance between the target and the endoscope¿s distal end is maintained and the tip of the laser probe is surely in the correct position in the endoscopic image".-3.Ifu provides the following warnings for use of apc.¿ "make sure that the distal end of the apc probe always lies more than 10 mm from the endoscope¿s distal end (see figure 4.9).The protrusion by 10 mm or more can be identified when the first black ring on the apc probe¿s distal end is visible in the endoscopic image.Otherwise, the treated region cannot be irradiated correctly, and the endoscope may be damaged.Using a damaged endoscope may cause patient injury".Olympus will continue to monitor field performance for this device.
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