Table 2.

Results for stents with mechanical failures^a

	Angiograms			Micro-CT		Histology Grade		SEM Grade
Case	Prestent	Poststent	Post/Pre Ratio	Follow-Up Grade	Total Aneurysm Occlusion (%)	Domeb	Neck	Stent Struts	Patch
3-A	0.68	3.14	4.62	2	55	4	0	1	1
12-B	3.44	0.33	0.10	3	60	4	0	3	2
13-B	1.53	2.70	1.76	2	20	0	0	3	3
15-B	1.82	0.69	0.38	3	30	3	0	3	2
Average	2.83 ± 2.02	0.69 ± 1.1	0.45 ± 1.06	4.5	85 ± 25	4	1.5	3	2

^aColumns 2 and 3, maximum percentage of total injected contrast material entering the aneurysm dome pre- and immediately poststent; 4, immediate poststent/prestent ratios of maximum CA volume entering the aneurysm dome; 5, follow-up angiographic grades: 0) intact aneurysm, 1) 0.75– 0.50 filling, 2) 0.50–0.25 filling, 3) <0.25 filling, 4) no filling but exhibiting some remnant neck, 5) no CA flow in the aneurysm dome or neck (total occlusion); 6, conebeam micro-CT scanning result—thrombosed volume relative to total aneurysm dome volume (%)—total aneurysm occlusion; 7 and 8, histology grade for dome and neck²⁰: 0) fresh blood clot or no thrombus, 1) organized thrombus in less than one-third of the area, 2) organized thrombus in one-third to two-thirds of the area, 3) organized thrombus in more than two-thirds of the area, 4) completely organized loose thrombus, 5) completely organized dense fibrous thrombus; 9 and 10, SEM grade for degree of endothelialization of stent and patch: 0) no cell coverage, 1) partial coverage with ECM and endothelial cells, 2) full coverage with ECM and endothelial cells, 3) full coverage with endothelial cells.

^bHistology grade for the partially thrombosed aneurysm dome and refers to the thrombosed portion of the dome.