The following were reviewed as part of this investigation: patient severity, complaint and lot history review, applicable previous investigation(s), sample (if available), labeling, and applicable fmea documents.Based on a review of this information, the following was concluded: the complaint of a bent needle is confirmed.Two 20 g x 0.75 in.Safe step infusion sets were returned for evaluation.An initial visual observation showed use residue on the returned samples.The needles of both returned samples were observed to be bent; one needle was bent near its base and the other needle was bent near its base as well as midway down its shaft.A microscopic observation revealed the tip of each needle was curled.A functional test of the safety mechanism found that the safety mechanism would not engage over the needle tip due to the bend within the needle.The location and severity of the bends observed in the needles of the returned infusion sets indicate the needles were most-likely damaged during use.Force applied at an angle to the needle axis, or if the needle is not inserted perpendicular into the port septum, can lead to bending of the needle shaft.It is advised to verify that the needle length is correct based on port reservoir depth, tissue thickness and the thickness of any dressing beneath the bend of the needle; if too long, needle and/or port may be damaged at insertion.Additionally, avoid excessive manipulation once the needle is in the port.No potential damage related to the manufacturing process was noted on the complaint sample.A lot history review (lhr) of asdrs0090 showed one other similar product complaint(s) from this lot number.The complaints for this lot number (asdrs0090) have been reported from the same facility.
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