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A visual inspection, functional testing, and dimensional analysis was performed on the returned device.The material separation was confirmed.The difficult to remove is related to case conditions and cannot be replicated in a lab environment.Production record and corrective and preventative actions (capa) reviews were performed and revealed no indication of a product quality issue.Additionally, a query of the complaint handling database for the reported lot revealed there is no indication of a lot specific issue.Based on the reported information and the observations from the returned analysis, a definitive cause for the reported issue could not be determined.It was reported the devices were removed by force.It should be noted that the bmw univ ii instructions for use states: if resistance is observed at any time, determine the cause under fluoroscopy and take remedial action as needed.Failure to do so may result in vessel trauma, guide wire damage, guide wire tip separation, or stent damage.In this case, the ifu violation did not contribute to the reported event.It is possible the guide wire tip was twisted due to the tip being caught by calcification causing the shaping ribbon to over twist likely leading to the separation of shaping ribbon from the tip solder when the device was pulled forcibly when he difficult to remove was encountered.This also contributes to the stretched coils.The cause of the difficulty to remove is related to the guidewire possibly becoming caught in the reported calcification.It is unlikely an interaction between the guide wire and the stent system or guideliner had occurred.There is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
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