(b)(4): the sample evaluation was able to confirm the reported failure mode.A functional test was performed and the access dilator could not be connected.The device was disassembled, and the internal blue disc was found to be dislodged and blocking the fluid pathway.A lot number was not provided with the complaint.Consequently, a device history record review could not be completed for the reported complaint.Based on the investigation results, a probable root cause from the manufacturing process could not be identified for the observed failure mode.All valve assemblies are 100% functionally leak tested prior to assembly into the pleurx catheter assembly.Any defective valve would be culled from the manufacturing process at this step and scrapped.Based on the observed defect from the complaint sample provided, the most likely source for the root cause was identified as the insertion of a foreign object into the valve causing the valve inner assembly to become dislodged.The investigation was not able to confirm this source as the root cause since the actual circumstances that contributed to the observed defect were not know by the investigation and could not be ascertained during the investigation.Based on the identified potential cause for the observed defective from the review of the complaint sample, the customer will be notified of the applicable warning contained on page 1 of the ifu regarding the use of only the access tip to access the valve.
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