Inspection of the returned device indicated the following: there was evidence that the outer blade had been bent at the distal end.In addition, the inner blade had a deformation on the distal cutting edge.The outer blade showed scratch marks.The device was disassembled to inspect the internal components, and it was noted that the inner blade was sheared off towards its proximal end.Additionally it was noted that the distal end of the inner blade had heavy scratches that resulted in removing a section of the laser mark on this blade.Because the scratch marks are circumferential and do not follow a helical pattern, this indicates that a foreign hard object introduced these scratches on both the inner and outer blades.The presence of these scratch marks on the outside of the outer blade as well further reinforce the possibility of a foreign hard object presented, since this surface does not see any scratches during standard usage.Any hard object introduced between the inner and outer blade can cause the inner to get off trajectory and collide with the outer blade.At this point, it is unclear what this object may have been as it was not found within the blade assembly.Based upon these observations, no further action is warranted at this time.(b)(4).
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