We checked the returned unit and confirmed that the operation channel stuck accessory/object.Based on the result, we concluded that it was caused due to the insufficient reprocessing at the facility on the operation channel.In addition, we confirmed that the u/d knob loose, the light guide cable for control body loose, the distal body worn out, the insertion flexible tube (ift) dented, and the biopsy inlet t-piece broken accessory blocking inside biopsy t-piece; however, they are not the main cause, and/or irrelevant to the alleged complaint.Based on the technical report ""hr-rpt-0588(channel)"" and/or the risk analysis results, it was evaluated to submit mdr.
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