(b)(4).A visual, functional and dimensional inspection of the product involved in the complaint could not be conducted since the product was not returned.No photo available.A device history record review could not be conducted since the lot number was not provided.Customer complaint cannot be confirmed due the lack of product sample to perform a proper investigation and determine the root cause.If the sample becomes available this investigation will be updated with the evaluation results.However, regarding other customer complaints due to the same issue, a capa file # (b)(4) was opened to perform a further investigation this issue ((b)(4)).According to the capa investigation so far the root cause for the issue was the positioning of the thread lead and the softness of the new resin used for the snap adaptor.Additionally, the personnel of the assembly line will be notified for awareness.
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(b)(4).Event description has been corrected.The sample was returned for evaluation.A visual exam was performed and it was observed that the internal threads of the adaptor were damaged.Functional testing was performed; however, oxygen entrainment testing could not be performed because the adaptor could not be connected correctly to the oxygen supply due to the damage on the internal thread.Based on the investigation performed, the reported complaint was confirmed.The root cause for the issue was found to be the positioning of the thread lead and the softness of the new resin used for the snap adaptor.A capa was opened to address this issue.
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