A detachable coil was being used to embolize an endovascular leak in a patient status post endovascular repair of aortic aneurysm.The coil was advanced via the accessed l1 artery to the site where deployment was desired within the aortic aneurysm sac; the coil proved to be too long and decision was made to retract the coil rather than deploy it.Resistance was encountered when trying to pull the coil back out through the deployment microcatheter.It became apparent that the coil was not retracting despite pulling on the deployment wire.Instead, it appeared that the coil was unraveling.Decision was made to pull the microcatheter with the coil in it back out through the 5f catheter.The microcatheter came out; however, the coil remained in the patient, partially deployed in the aortic sac and extending back through the l1 artery into the aortic lumen.The bulk of the unraveled coil within the aortic lumen was removed using various techniques including a snare device.A tiny fragment remains protruding 10-20 mm into the aortic lumen.This is a very fine wire fragment and its protrusion into the aorta is of no clinical significance (opinion).
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