(b)(4).The device was returned for evaluation.Visual and photo inspection confirmed that the plastic packaging was stuck to the femoral implant in several locations.Further investigation revealed that the femoral component was packaged with a raw material lot of polyethylene bags that was previously identified as having the potential to adhere to highly polished surfaces.Independent lab testing has confirmed that the residue is non-toxic.Biocompatibility testing has determined that there exists a negligible risk to the patient associated with the reported issue.The lot was manufactured on 18 may 2012.The device was used for treatment.No other complaints have been received for this product/lot.Many factors have been identified that lead to the sticky bag occurrence, such as the size of the implant, the time of the year the product was packaged and the material formulation of the polyethylene bags.This issue has been previously investigated and as part of corrective action, a new supplier for the polyethylene bags has been selected and testing completed to ensure thermal reliability and stability of the new bags.Field action (b)(4) was initiated on january 11, 2016 to remove remaining affected units from the field.This field action contains the related part and lot number.This mdr was identified during an internal retrospective review to meet reporting requirements and therefore is being filed retrospectively.
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