The microcatheter was not returned for analysis.The separated distal portion of the microcatheter remains within the patient.Attempts have been made to obtain additional information, however, our attempts have been unsuccessful.Based on the reported information, the report of catheter entrapment and separation could not be confirmed and the cause could not be determined.It is possible the separation resulted due to tensile failure of the microcatheter during extraction from the treatment site.It is likely that the microcatheter was pulled beyond the 20cm limit noted in the instructions for use.Per our device¿s, instructions for use (ifu): ¿if catheter entrapment is suspected (with any embolic agent), fast catheter retrieval technique may result in catheter shaft separation and potential vascular damage.Follow catheter retrieval instructions at the end of instructions for use.Do not apply more than 20 cm of traction to catheter to minimize risk of catheter separation.Mdr related to this event: 2029214-2017-00286 2029214-2017-00287.A good faith effort will be made to obtain the applicable information relevant to the report.If information is provided in the future, a supplemental report will be issued.
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Citation: transarterial treatment with onyx of cognard type iv anterior cranial fossa dural arteriovenous fistulas.Li c1, wu z, yang x, li y, jiang c, he h.J neurointerv surg.2014 mar;6(2):115-20.Doi: 10.1136/neurintsurg-2012-010641.Epub 2013 feb 15.This patient presented with intraparenchymal hemorrhage was asymptomatic with sudden seizure, headache, nausea, without neurological impairment.The right middle meningeal artery was treated with the liquid embolic material.There was report of catheter entrapment.Fortunately, hemorrhage did not occur during retrieval of the microcatheter and there was no subsequent complication associated with retention of the distal part of the microcatheter in this case.Post intervention, the patient was reported to have transient chemosis and retro-orbital discomfort.However, this did not required medical intervention.
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