The subject device was returned to olympus medical systems corp.(omsc) for evaluation.The foreign material and burnt tissue stuck to the distal end of the subject device.There was no abnormality of the resistance between the forceps and the plug of the handle.The subject device could be activated properly the reported failure could not be reproduced.The device history record was reviewed and found no irregularities.Based on the past similar cases, it was known that the event occurred due to any of the following possible causes.The current density decreased due to burnt tissue attached to the distal end.The subject device was not connected to the cord or the cord was not connected to the power supply correctly.The current density decreased because the target area was immersed in blood or water.The above device handling has warned in the instruction manual as follows.Before use, prepare and inspect the instrument and a cord as instructed below.Should the slightest irregularity be suspected, do not use the instrument or a cord; use a spare instead.Damage or irregularity may compromise patient or user safety, pose an infection control risk, cause tissue irritation, perforation, bleeding, mucous membrane damage or thermal injury and may result in more severe equipment damage.Aspirate fluids such as mucus that adhere to the tube and body cavity tissue.Patient injury such as perforation, bleeding, mucous membrane damage and thermal injury of tissue could result if output is activated with these fluids adhering.
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During an endoscopic submucosal dissection (esd) in the colon, the subject device was used with an electrosurgical generator (not olympus device).In the procedure immediately after the start of use the subject device, the subject device did not activate output.The intended procedure was completed with another device.There was no patient injury reported.This is the report regarding the failure of the output.
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