(b)(4).Visual inspection of the returned product confirmed the reported condition.Further investigation revealed that the femoral component was packaged with a raw material lot of polyethylene bags that were previously identified as having the potential to adhere to highly polished surfaces, which may leave a residue and in some cases a portion of polyethylene on the device.Evaluation of the polyethylene bags has been completed to assess risk to the patient and found "risk assessment indicates that the likelihood of a toxic effect from the low density polyethylene ldpe bags is negligible".Independent lab testing found the residue to be non-toxic.Testing has been that shows the residue can be removed with a cloth moistened with water or isopropyl alcohol.The lot was manufactured on may 25, 2012 which is prior to the capa implementation date of december 20, 2012.This device is used for treatment.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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