ENDOVASCULAR COIL OCCLUSION OF EXPERIMENTAL ANEURYSMS - PARTIAL TREATMENT DOES NOT PREVENT SUBSEQUENT RUPTURE

Experimental aneurysms with a high propensity to spontaneous rupture w ere used to assess the efficacy of endosaccular packing with platinum coils. Lateral aneurysms, surgically constructed in pigs from vein all ographs, were untreated or treated by partial or total endovascular pa cking with coils. All untreated aneurysms (4/4) ruptured and most (3/4 ) partially treated aneurysms also ruptured. None of 6 aneurysms in wh ich the lumen was occluded by 90% or more ruptured or demonstrated reg rowth on subsequent angiography. Partial treatment was therefore not e ffective in preventing delayed haemorrhage. These findings suggest tha t subtotal endovascular treatment may not be protective alter aneurysm al subarachnoid haemorrhage.