This remediation mdr was generated under protocol (b)(4), as a result of warning letter cms# (b)(4).Samples received: 11 samples were returned for evaluation, one sample came without its original packaging in used condition, decontaminated and inside a plastic bag.10 samples were returned in unused conditions within its original sealed packaging.Visual inspection: the complainant returned units were visually inspected at a distance of 12 to 16 inches under normal conditions of illumination, per visual inspection, no damages or other discrepancies were detected.Functional testing: in the 10 unused samples, air was completely purged, and the water flowed easily through the entire unit, no leakage, occlusion or air collection in the filter was observed.In the used sample, air was completely purged, and the water flowed easily through the entire unit, however it started to leak from the air vent in the filter.Root cause: no root cause could be related to the manufacturing process, it was determined as a supplier component issue.Action taken: a supplier corrective action report (scar) was communicated to the supplier on jul 2021 and closed in december 2021.
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