The subject device was returned to olympus medical systems corp.(omsc) for evaluation.There were no defects affected to stopping bleeding.As the result of checking the manufacturing record, there was nothing abnormal found.The exact cause could not be conclusively determined.However, based on the evaluation and the reported situation, there might be bleeding because the user released the subject device from the tissue while the carbonized tissue was stuck to the subject device.The instruction manual of the subject device warns; always operate the electrosurgical unit at the minimum output level and for the minimum time necessary to successfully complete the procedures.Excessive output level and time may result in patient injury, such as perforation, bleeding or mucous membrane damage.
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