(b)(4).Six used caresite smallbore extension sets were received for evaluation.Packaging returned with the samples indicated lot number 0061446132.One of the returned sets was identified as containing chemo.The caresite smallbore extension set (catalog # 470106) contains two caresite valves per set.On five of the six returned sets (including the set identified as containing chemo), a crack was observed on the female luer threads of the molded caresite body on one of the two caresite valves contained on each set.The cracks started from the top of the valve and extended down to the bottom of the luer threads.No cracks or other anomalies were visually observed on the sixth remaining set.This set was then subjected to leakage testing according to specification with acceptable results.Review of the discrepancy management system database performed for the reported lot number did not reveal any abnormalities or nonconformances of this nature.Although a definitive conclusion could not be made regarding the cause of the reported event, cracking of this nature can occur when the product is subjected to aggressive solvents, excessive mechanical stresses, or other various unforeseen circumstances during the clinical application.If additional pertinent information becomes available, a follow-up report will be filed.
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