Manufacturing review: a manufacturing review was performed.The lot met all release criteria.Visual/microscopic inspection: as the device was not returned, an inspection could not be performed.Functional/performance evaluation: as the device was not returned, an evaluation could not be performed.Medical records review: no medical images have been made available to the manufacturer.Conclusion: the complaint investigation is inconclusive for failure to advance.Based on the available information, a definitive root cause is unknown.Labeling review: the current ifu (instructions for use) states: warnings/precautions: - delivery of the meridian filter through the introducer sheath is advance only.Retraction of the pusher wire during delivery could result in dislodgment of the filter, crossing of filter legs or arms, and could prevent the filter from further advancement within the introducer sheath.- the safety and effectiveness of this device has not been established for morbidly obese patients.- care should be taken to ensure the connection between the introducer sheath hub and the filter storage tube is tight; however, the use of excessive force which can cause slippage of the threads and/or breakage of the hub should be avoided.- it is very important to maintain introducer sheath patency with the saline flush so that the grooved segment that holds and properly orients the filter legs does not become covered by clot.
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