I think this was the mechanism: https://www.hopkinsmedicine.org/neurology_neurosurgery/centers_clinics/aneurysm/treatment/aneurysm_endovascular_coiling.html ht

I think this was the mechanism: https://www.hopkinsmedicine.org/neurology_neurosurgery/centers_clinics/aneurysm/treatment/aneurysm_endovascular_coiling.html https://www.hopkinsmedicine.org/neurology_neurosurgery/cente... They guide the wire by giving you a kind of "live" x-ray.