(b)(4).The returned autotome rx 44 was analyzed, and a visual evaluation noted that the cutting wire was broken, blackened, and kinked.The device was observed under magnification, and the cutting wire was blackened and broken from the proximal pierced hole of the working length.There was no twist found on the working length.No other problems with the device were noted.The product analysis revealed that the cutting wire was broken, and blackened.The cutting wire being blackened indicates that the device was energized.Based on the condition of the device, the problem found could have been generated if there was contact between the device and the scope during energization or if the generator exceeded the maximum of voltage during the procedure.Also, energizing the device prior to performing sphincterotomy can compromise the cutting wire's integrity and cause a premature cutting wire fatigue.Additionally kinking/bending the cutting wire can lead to break it.It is most likely that procedural or anatomical factors encountered during the use of the device could have affected the device performance and its integrity.Based on all gathered information, the most probable root cause of this complaint is adverse event related to procedure.A review of the manufacturing documentation for this device revealed that no anomalies or deviations related to the event occurred during manufacturing.A labeling review was performed and, from the information available, this device was used per the instructions for use (ifu) / product label.
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