Michael McBride
Procedural Risks of Aneurysms Less than 7 mm

SchoolSt. Edward High School


MentorThomas Masaryk, MD


Procedural Risks of Aneurysms Less than 7 mm
Aneurysms of less than 7 mm are more prone to procedural complications.
This was a retrospective chart review that included patients with aneurysms less than 7 mm that were treated at Cleveland Clinic from Jan. 2, 2008, to March 20, 2009. The total number of patients was 92; the average age was 54 years. The locations of aneurysms were as follows: ACOM, 18; ICA, 18; basilar, 10; ACA, 3; PCOM, 15; ophthalmic, 5; carotid, 5; PICA, 7; and not listed, 2. The number of patients admitted with subarachnoid hemorrhage was 44.
The complication rate was 6.18% for ruptured aneurysms, compared to 19 other published studies that had complication rates of 9% with ruptured aneurysms. About 48% of aneurysm patients in this study were admitted with a subarachnoid hemorrhage. The other studies presented 68.3% of “small” aneurysms that were admitted had subarachnoid hemorrhage compared to only 31.7% of large aneurysms admitted with subarachnoid hemorrhage. The procedural complication rate for endovascular treatment of aneurysms less than 7 mm appears to be lower than the published overall complication rate. More studies are needed to assess the risk.


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