(b)(4) follow up a device history record review was completed by our quality engineer team for provided material number 306546 and lot number 3173798.The review did not reveal any detected abnormalities during the production process that could have contributed to this defect and all quality tests were found to be within specification.As a sample was unavailable for return, a thorough sample investigation could not be completed.Based on the investigation results, an exact cause for this incident could not be identified.All bd posiflush¿ pre-filled syringes are designed to ensure maximum patient safety.The stopper and plunger rod have special design features which stop pull-back on the plunger rod, which may have allowed the stopper to travel behind its original parked location and enter a non-sterile region.This safety mechanism prevents the solution from entering a non-sterile area of the syringe, helping to reduce the risk of solution contamination and thereby ensuring patient safety.Pulling back on the plunger rod, either before, during or after the administration of saline flush may lead to plunger rod being separated from the stopper, especially when the plunger rod is twisted during pull-back motion.Should you again experience any problems with our product we would appreciate the opportunity to conduct a thorough analysis.There are quality controls currently in place to detect this type of defect during the production process.Further action has not been determined necessary at this time.
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