Document Detail

Aneurysm Volume-to-Ostium Area Ratio: A Parameter Useful for Discriminating the Rupture Status of Intracranial Aneurysms.
MedLine Citation:
PMID:  21135739     Owner:  NLM     Status:  In-Data-Review    
BACKGROUND: : Slow or stagnant flow is a hemodynamic feature that has been linked to the risk of aneurysm rupture.
OBJECTIVE: : To assess the potential value of the ratio of the volume of an aneurysm to the area of its ostium (VOR) as an indicator of intra-aneurysmal slow flow and, thus, in turn, the risk of rupture.
METHODS: : Using a sample defined from internal databases, a retrospective analysis of aneurysm size, aspect ratio (AR), and VOR was performed on a series of 155 consecutive aneurysms having undergone 3-dimensional digital subtraction angiography as a part of their evaluation. Measurements were obtained from 3-dimensional digital subtraction angiography studies using commercial software. Aneurysm size, AR, and VOR were correlated with rupture status (ruptured or unruptured). A multiple logistic regression model that best correlated with rupture status was generated to evaluate which of these parameters was the most useful to discriminate rupture status. This model was validated using an independent database of 62 consecutive aneurysms acquired outside the retrospective study interval.
RESULTS: : VOR showed better discrimination for rupture status than did size and AR. The best logistic regression model, which included VOR rather than size or AR, determined rupture status correctly in 80.6% of subjects. The reproducibility calculating AR and VOR was excellent.
CONCLUSION: : Determination of VOR was easily done and reproducible using widely available commercial equipment. It may be a more robust parameter to discriminate rupture status than AR.
Ryuta Yasuda; Charles M Strother; Waro Taki; Kazuhiko Shinki; Kevin Royalty; Kari Pulfer; Christof Karmonik
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Neurosurgery     Volume:  68     ISSN:  1524-4040     ISO Abbreviation:  Neurosurgery     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-06-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7802914     Medline TA:  Neurosurgery     Country:  United States    
Other Details:
Languages:  eng     Pagination:  310-8     Citation Subset:  IM    
*Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin; †Department of Neurosurgery, Mie University, School of Medicine, Mie, Japan; ‡Department of Statistics, University of Wisconsin, Madison, Wisconsin; §Siemens HealthCare, Malvern, Pennsylvania; ∥The Methodist Hospital, Houston, Texas.
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