It was reported to boston scientific corporation that an advanix biliary stent was used during a procedure in the bile duct.The event date was not reported.During the procedure, it was noted that when placing the stent in the bile duct, it failed to deploy.Also, a resistance was observed when trying to insert the stent into the guidewire.There were no patient complications reported as a result of this event.
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(b)(4).Investigation summary: the returned advanix biliary stent was analyzed, and a visual evaluation noted that the pull wire was retracted without any issue or tension.The device was disassembled to confirm the guide catheter that was detached from the pull wire.The activation of the device was performed, pull wire was retracted but stent did not deploy.No other problem with the device were noted.The reported event was confirmed.Based on the most relevant information of the complaint event description, device analysis and including the product record review results, the device meets all manufacturing specifications required and passed all the controls and inspections, no abnormalities were reported during the assembly process.After the visual inspection of the device, a bent was identified on proximal section of the push catheter and distal stent barb deformed.As per complaint information, the issue occurred during procedure.It is most likely that procedural or anatomical factors encountered during procedure could have affected the device performance and its integrity.User technique when advancing the device through the scope can cause the deformation on the barb and the push catheter kink.During the functional inspection, when the pull wire was retracted, the stent did not deploy.It was observed that the guide catheter does not retract with the pull wire.Based on this, it was decided to disassembly the device and it was found that the guide catheter was detached from the pull wire.The detached may happen due the excess of force used by the physician pulling the pull wire, also the bent on the push catheter and torsion by anatomical factors can cause tension on the pull wire and could influence on the detachment.Therefore, based on the information available and the analysis performed, the overall conclusion code for the complaint will be as adverse event related to procedure since the adverse event occurred during the procedure and the device had no influence on event.
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