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It was reported that the procedure was to treat a highly tortuous, heavily calcified ostium of the superior mesenteric artery.A hi-torque (ht) proceed guide wire was advanced to the lesion, but with much resistance from the anatomy.Slight force was applied and the guide wire was ultimately advanced against resistance to the lesion.Once at the lesion it was noted that the tip had subsequently separated (still remaining at the lesion).Physician decided to end the case and continue on another unspecified date.It was confirmed that the tip will not be retrieved as it was deemed insignificant to the patient's health and remains in the tight lesion.No additional information was provided.
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Visual and dimensional analysis was performed on the returned device.The material separation was confirmed.The difficult to advance and improper procedure were not tested due to the condition of the device and therefore not confirmed.A review of the lot history record identified no manufacturing nonconformities issued to the reported lot that would have contributed to this event.Additionally, a review of the complaint history identified no indication to suggest a lot specific product issue exists.It should be noted that the instructions for use (ifu), gw, ht proceed states: carefully observe the instructions under ¿do not¿ and ¿do¿ below.Failure to do so may result in vessel trauma, guide wire damage, guide wire tip separation, or stent damage.If resistance is observed at any time, determine the cause under fluoroscopy and take remedial action as needed.Use the most suitable guide wire for the lesion being treated.Do not: push, auger, withdraw, or torque a guide wire that meets resistance.However, the physician noted that ¿slight force¿ was applied to the wire to get it to cross the lesion although there was much resistance from the anatomy.Based on the information provided, the investigation determined the cause for the reported difficult to advance, and material separation were due to the circumstances of the procedure.In this case, based on the reported information, it is likely that the wire was damaged during the insertion process.In certain circumstances, such as manipulation through tortuous and/or tight lesions, where heavy torquing and/or pushing/pulling is required, the stresses induced in the wire may have exceeded the design of the wire.The additional stretched coils, and deformed material are related to the case circumstances.Corroded wire is a normal observation due to transit of returned devices.There is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.Device code 2017-"excessive force" was removed.
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