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Vibrometry
Author(s) -
AGARWAL GAUTAM,
MOZES GEZA,
KINNICK RANDALL R.,
GLOVICZKI PETER,
BRUHNKE RUSSELL E.,
CARMO MICHELE,
HOSKIN TANYA L.,
BENNETT KEVIN E.,
GREENLEAF JAMES L.
Publication year - 2006
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1196/annals.1383.001
Subject(s) - chemistry
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.