(b)(4).Evaluation summary: the device was returned and analyzed.The reported unstable dilator cap was not confirmed as the cap was able to be tightened and functioned as intended.A review of the lot history record revealed no manufacturing nonconformities that would have contributed to this complaint.Additionally, a review of the complaint history identified no other incidents reported from this lot.The mitraclip system instructions for use (ifu) states do not use the device if damage is detected.Use of damaged product may result in air embolism, vascular and/or cardiac injury.The ifu also states that the dilator is used for introduction of the steerable guide catheter into the femoral vein and left atrium.All available information was investigated and a definitive cause for the reported unstable dilator cap in this incident could not be determined.The returned device analysis confirmed that the cap functioned as expected once it was pressed back onto the rhv.Based on the information reviewed, there is no indication of a product quality issue with respect to design, manufacture or labeling of the device.
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