This event has been recorded in (b)(6).The defective unit was not returned to the manufacturer, thus the device was not evaluated.Six (6) units from the same manufacturing lot were retrieved from retained samples and successfully passed flow rate stability test and flow rate accuracy test.In addition, the batch record of the affected lot number was reviewed and no incidence similar to the one reported was detected in the controls done during the manufacturing process nor in the controls done before the product release.Therefore, the defect reported by the customer could not be reproduced.Anyway, nothing justifies the occurrence of such an incidence.The position of 250 ml/h is the maximum value of the scale of the flow regulator.Then, if the directions for setting up the product according to the ifu are followed, it is not possible to get the double of flowrate in this position.
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