(b)(4).Evaluation summary: (b)(4).The device was returned and the deployment difficulty and elongation were not confirmed because the stent was already deployed.Based on a visual inspection of the returned product, there is no indication of a product quality issue with respect to manufacture, design, or labeling.A definitive cause for the reported deployment difficulty could not be determined.The elongation likely occurred due to operational context.A review of the lot history record identified no manufacturing nonconformities.Additionally, a review of the complaint history identified no similar incidents from this lot.Based on the information reviewed, there is no indication the issue was caused by, or related to the design, manufacture or labeling.
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