This mdr was generated under protocol (b)(4), as a result of warning letter cms# (b)(4).No problems or issues were identified during the device history record review.No causes or potential causes of the customer's reported problem were found during the review of service and repair records.No product sample was received; therefore, visual and functional testing could not be performed.The reported issue could not be confirmed as no product sample was received for evaluation.If the product is returned, the manufacturer will reopen this complaint for further investigation.Action taken: review of the maintenance work order history during and around the time of the reported event showed during this production run, two work orders were written.Work order was written with a description that indicated that no solvent was being applied to the tubing on the male end of the set on 1st shift.The root cause was found to be that the drop needle that applies the solvent had bent enough that intermittent tubing sets were not receiving the solvent.The correction was to replace the bent needle.A work order was written with a description that also indicated that no solvent was being applied to the tubing on the male end of the tubing set for the 2nd shift.The root cause was that the bolt that controls the drop needle adjustment was loose and allowed the needle to move.The correction was to place the needle back and tighten the bolt.Any maintenance work order that is related to correction of solvent application is to have samples ran after correction and given to qc for further testing and confirmation of correction.It does not appear that this was completed based on the work order documentation.The technician identified has been notified and will re-train to this procedure to ensure that solvent application corrections follow this procedure.On top of this re-training, it has been decided that with any solvent application work orders an associated ncmr shall be written by production to flag the lot for 100% solvent inspection (missing component).Quality alerts have been posted on the production machine and notifications have been sent to all production management and supervision.A review of the last two years of complaints shows 5 sets of complaints that come to a quantity of 14 components that have experienced this defect.Two lots have been identified, all other complaints have been "unknown lots".
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