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Balt usa reference: #(b)(4).The returned device was inspected in our quality laboratory.During our analysis: - we observed the introducer sheath associated with the coil system was not included in the device return; - we observed the associated microcatheter was returned; - we noted that the microcatheter was able to be flushed; - we observed upon return of the coil system, the implant coil was detached from the delivery pusher; - we observed no sign of detachment cycle being ran; - we observed no visual damage to the detachment zone with the pet jacket, lead wires and solder joints intact; - we observed multiple minor kinks along the hypotube; - we conducted destructive testing of the delivery pusher to reveal the detachment profile of the sr thread; - we observed the tip of the sr thread experienced necking - indicating the thread endured an overload in tensile stress; - we noted an in house implant coil was not able to be advanced out of the associated microcatheter; - we observed multiple major kinks along the returned microcatheter.Approximately 3cm from the distal tip of microcatheter.Root cause of the reported issue can likely be attributed to an overload of tensile stress exerted on the implant coil.Upon return of the device, we observed no sign of detachment cycle being ran.In addition, we observed the profile of the distal tip of the sr thread to indicate that the thread endured an overload in tensile stress.Without the return of the implant coil its exact condition is unknown, however it is possible that the implant coil had become damaged during the procedure.It was reported that the user was deploying the distal 1/3 of the coil, the microcatheter moved back proximally.The user retracted the coil delivery wire to reposition the coil and microcatheter.The user "felt a pop" and lost "one-to-one" control with the coil delivery wire and his manipulation on the back-end was not translating.It is possible that the implant coil had become damaged during the repositioning of the microcatheter, possibly leading to the reported issue.It is indicated in the lhr that the unit underwent 100% inspection which verifies that the implant was free of damage at the point of final inspection.Review of the lot history records did not reveal any in-process or lot-specific issue that could account for the observation.No additional complaint against lot number f230300500 has been made for the same issue.Comprehensive analysis of this failure mode has remained subject to monitoring for any unacceptable increase in trend.The submission of this report or related information to the fda, and its release by fda, does not reflect a conclusion by the party submitting this report of the fda that the report or related information is an admission that the manufacturer, their employees, or the device caused or contributed to the reportable event.
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It was reported that: "the physician proceeded with coiling and asked for an optiblock 4x20.Upon deploying the distal 1/3 of the coil, the microcatheter moved back proximally.The physician retracted the coil delivery wire to reposition coil and micro.He noted he "felt a pop" and lost "one-to-one" control with the coil delivery wire and his manipulation on the back-end was not translating.With 1/3 of the coil out of microcatheter and displaced from the venous pouch in the sinus ostium, the physician first attempted to aspirate the coil and remove.That was unsuccessful.He then removed microcatheter and used the ensnare system to retrieve the coil." update 15mar2024 - additional information received from the issuer: "anatomy was not tortuous.As you can see from the two images of the premature detached coils there is a 5fr system with micro directly into venous pouch." incident report form submitted for this complaint indicates that no patient injury was sustained.
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