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A search for non-conformances associated with the reported part/lot number combination did not reveal any production-related issues relevant to the complaint that occurred during manufacturing of the device.The device was reported available for return for analysis, but has not yet been received; therefore, the alleged product issue cannot be confirmed at this time.If the device or additional information is received, a supplemental report will be submitted.
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It was reported that during an arterial venous fistula (avf) procedure, the physician was prepping the scepter mini balloon device and it appeared to not fully open at prepping.However, the physician decided to continue treatment with the balloon and inject liquid embolization through it.When the physician was completed with the injection, it was noticed that the device felt stuck.The physician was able to pull the device out of the patient after resistance and it was noted that the device looked stretched and that the distal tip of the balloon catheter was missing and left in the patient.The physician opened a second scepter mini device to continue injections in a different location in the body.The physician has no concerns and patient is well.Everything is entrapped and stable.
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Summary of device evaluation: investigation findings: visual examination of the scepter mini found a kink at approximately 71.7cm from the distal tip of the strain relief.Examination of the hub under x-ray found the guidewire lumen and inflation lumen occluded with material consistent with the injected liquid embolic material described in the reported event.The total working length of the scepter mini unit is 165cm; however, the returned unit had a length of approximately 138.5cm.The distal 26.5cm of the scepter mini unit (which includes the balloon) was missing and was not returned for evaluation.Further inspection of the scepter mini, found the catheter coil stretched and the catheter outer jacket stretched and frayed, which indicates the device experienced a tensile break.Investigation conclusion: four angiographic images were provided by the customer for review.Image 1 is a lateral subtracted dsa of occipital artery.There is a davf of the sigmoid/transverse sinus.Based on this one image, it cannot be determined if it is a borden 1,2 or 3, but cortical venous drainage could not be observed.There is some opaque liquid embolic material around the fistula site.There may be a microcatheter in the occipital artery, but it cannot be determined if it¿s the broken distal segment described in the report or simply the microcatheter positioned in the artery.Images 2 and 3 are the same lateral subtracted dsa of occipital artery.A dac is seen in the horizontal segment of the occipital artery.Coils are seen in an extracranial branch of the occipital artery.There is some opaque liquid embolic material around the fistula site.If there is a retained microcatheter segment, it cannot be seen since the images are subtracted.Image 4 is a lateral subtracted dsa of occipital artery.Less occipital branches are seen, presumably as the result of embolization, but there appears to be some vasospasm at the tip of the catheter, which could also explain the lesser amount of filling.There is still shunting to the sigmoid sinus and the jugular.The cause or mechanism of the fractured, retained catheter described in the report is not seen on these images.However, the investigation of the returned scepter mini found the hub occluded with material consistent with onyx and the device kinked with approximately 26.5cm of the distal section separated.The distal section of the scepter mini was not returned for evaluation.Further investigation found the catheter coil stretched and the catheter outer jacket stretched and frayed, which is consistent with the device experiencing a tensile break.The physical evaluation of the device could not identify the conditions or circumstances that led to the damage, but the damage is consistent with the device experiencing forces over specification.
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