A sample was received to perform an investigation.Under visual inspection it was found that the rotating collars (luer locks) were missing on the returned filters.Each flat filter contains retention edge which is designed to hold rotating collar connected with filter.Retention edges on returned samples were found to be damaged; and therefore, unable to hold rotating collars in place.Per instructions for use (ifu) overtightening the connection between the epidural catheter connector or epidural needle to the male rotating collar may cause rotating collar to dislodge from filter body.The cause of this problem was determined to be user related.As this was a non-manufacturing related issue, a device history record (dhr) review was not performed.D4 is unknown.No product information has been provided to date.This remediation mdr was generated under protocol (b)(4), as a result of warning letter cms# (b)(4).
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