A stealth peripheral orbital atherectomy device (oad) was used for treatment of a lesion in the proximal superficial femoral artery (sfa) via left antegrade approach.After the device was advanced into the proximal sfa, it became difficult to advance.Glideassist was enabled, but the difficulty persisted.Glideassist was disabled, and low speed was activated.The oad did not advance, and it was turned off after two seconds.At that time, it became clear the crown was near the distal end of the guide catheter.An attempt was made to pull the wire and oad back, and at that time it was determined the driveshaft had fractured.The oad was removed from the patient.A diagnostic catheter was altered and used to snare the fragment.The sheath and wire were then removed from the patient.The driveshaft fragment remained inside of catheter upon removal.
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Device analysis conclusion: the oad was returned to csi for analysis.Visual examination confirmed the reported driveshaft fracture at the distal edge of the crown.The distal driveshaft section was returned engaged over the guidewire.There was no damage observed with the returned guide wire that would have contributed to the fracture.Scanning electron microscopy analysis of the fractured filars show evidence of fatigue, which is an indication that the driveshaft was operated in a high-stress environment.However, the exact root cause of the fracture remains undetermined.The device history record for this oad lot number has been reviewed.No issues or discrepancies were noted during this review that would have contributed to the reported event.The device met material, assembly, and quality control requirements.(b)(4).
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