A review of the device history record traceable to the reported lot number indicates that the product was processed and released according to the product¿s acceptance criteria.Two used samples were returned for evaluation.Inspection of the sample found no obvious defects that would have contributed to the reported event.The fms (fluidics management system) cassette was tested on a console, primed and tuned with the ultrasonic hand piece successfully and could achieve maximum vacuum.No system message was generated during functional testing.No fluid or air leaks, and no cracks were observed from the connectors.The irrigation and aspiration flow rates were measured and found to be within specifications.Fluid flowed from the bss (balanced salt solution) bottle through the irrigation path continuously, no fluidic anomalies were observed.No occlusion or obstruction was identified during inspection and functional testing.The root cause of the customer's complaint could not be established as the returned fms cassette was evaluated and met specifications.After investigation of this complaint, it has been determined that this sample functioned per specifications; therefore, no corrective action is required at this time.Quality assurance has reviewed this complaint and will continue to monitor data for evidence of adverse trending and take further action, as appropriate.Consumables manufacturing management has been made aware of this complaint through the consumer affairs review meeting.The manufacturer internal reference number is: (b)(4).
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