| Vibrometry: a novel noninvasive application of ultrasonographic physics to estimate wall stress in native aneurysms. | |
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MedLine Citation:
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PMID: 17182936 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Our objective was to test vibrometry as a means to measure changes in aneurysm sac pressure in an in vitro aneurysm model. Explanted porcine abdominal aortas and nitrile rubber tubes were used to model an aneurysm sac. An ultrasound beam was used to vibrate the surface of the aneurysm model. The motion generated on the surface was detected either by reflected laser light or by a second ultrasound probe. This was recorded at different aneurysm pressures. The phase of the propagating wave was measured to assess changes in velocity and to see if there was a correlation with aneurysm pressure. The cumulative phase shift detected by laser or Doppler correlated well with increasing hydrostatic pressure in both the rubber and the porcine aorta model. The square of the mean pressure correlated well with the cumulative phase shift when dynamic pressure was generated by a pump. However, the pulse pressure was poorly correlated with the cumulative phase shift. Noninvasive measurement of changes in aortic aneurysm sac tension is feasible in an in vitro setting using the concept of vibrometry. This could potentially be used to noninvasively detect wall stress in native aneurysms and endotension after endovascular aneurysm repair (EVAR) and to predict the risk of rupture. |
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Authors:
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Gautam Agarwal; Geza Mozes; Randall R Kinnick; Peter Gloviczki; Russell E Bruhnke; Michele Carmo; Tanya L Hoskin; Kevin E Bennett; James L Greenleaf |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Annals of the New York Academy of Sciences Volume: 1085 ISSN: 0077-8923 ISO Abbreviation: Ann. N. Y. Acad. Sci. Publication Date: 2006 Nov |
Date Detail:
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Created Date: 2006-12-21 Completed Date: 2007-02-20 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7506858 Medline TA: Ann N Y Acad Sci Country: United States |
Other Details:
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Languages: eng Pagination: 197-207 Citation Subset: IM |
Affiliation:
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Department of Vascular Surgery, Mayo Clinic, Rochester, Minnesota 55905, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aneurysm
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ultrasonography* Animals Aorta / ultrasonography Nitrites Rubber Stress, Mechanical Swine Technology, Medical / instrumentation*, methods* Vibration |
| Chemical | |
Reg. No./Substance:
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0/Nitrites; 9006-04-6/Rubber |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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