The device history record (dhr) review confirmed that the device met all material, assembly and performance specifications.During the analysis of the returned device, it was revealed that the main coil was stretched and broken.Functional testing could not be performed due to the condition of the device.The reported issue is covered in the device directions for use.The risk of the reported event is documented in the risk documentation and there are current controls to mitigate the risk of the as reported event.It is most likely that the coil stretched and then broke during manipulation of the coil against friction.Therefore, a cause of procedural factors will be assigned to the investigation.
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