The following were reviewed as part of this investigation: patient severity, complaint and lot history review, applicable previous investigation(s), sample (if available), labeling, and applicable fmea documents.Based on a review of this information, the following was concluded: the complaint of a damaged guidewire is confirmed and was determined to be use related.One 0.018 in.Nitinol guidewire was returned for evaluation.An initial visual observation showed the core wire of the guidewire was broken and the coiled wire was severely unraveled.Use residue was observed throughout the sample.A microscopic observation revealed the weld tip was present and intact.The distal break site of the core wire was observed to be tapered with an uneven and granular surface texture, which is evidence of a tensile break cause by excessive pulling force.The product ifu states: ¿do not use excessive force when introducing guidewire¿ and ¿if the guidewire must be withdrawn while the needle is inserted, remove both needle and wire as a unit to prevent the needle from damaging or shearing the guidewire.¿ an examination of the wire structure revealed no potential damage/defect related to manufacture of the product.
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