Result: the device was not returned to penumbra.This investigation is based on photographs taken by the quality department at penumbra's distributor in (b)(4).The plastic threads on the pump canister filter screw are damaged.Conclusion: the complaint has been evaluated.The complaint indicates that the canister filter would not fix to the pump.Based on the photographs, it is likely that the filter might have been forced fitted to the pump, stripping the plastic screw threads.It is also possible that the filter screw threads were deformed due to a manufacturing defect.The manufacturing records for this lot were reviewed and did not reveal any outstanding discrepancies, design, or quality concerns.
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