As part of our investigation, multiple follow ups to the user facility were made by telephone and in writing in an attempt to gather additional information on the reported event; however, no further information was obtained.A review of the service history indicates the scope was purchased on (b)(6) 2018 and has received service via three repairs in the past two years.The scope was last repaired on (b)(6) 2019 for a kinked/broken bending section.(b)(4) a visual inspection was performed on the scope and noted the metal bending section skeleton tab was protruding from the bending section cover near the insertion tube area.The bending section cover and the bending section skeleton were fully broken and separated with no signs of any sharp edges.The insertion tube on the scope was a third party repair/part.There were also third party repairs noted with the bending section cover/glue and protector boot.The image on the scope is flickering and the up/down angulations on the scope are low.Based on the evaluation results, the most probable cause of the broken bending section can be attributed to (unintended) operation error or from improper maintenance.To mitigate the risk of equipment damage the instruction manual states, "do not twist or bend the bending section with your hands.Equipment damage may result; do not insert the insertion tube with excessive force into the ureter or calix.The bending section may be damage.".
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