Intraoperative assessment of stapes movement
A Huber, T Linder, M Ferrazzini, S Schmid, N Dillier, Sandro Stöckli & U Fisch
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abstract
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A method is described that allows, for the first time,
intraoperative vibration modes assessment of the acoustically
stimulated stapes by means of scanning laser Doppler interferometry
(LDI). The study was designed to answer the following questions: 1)
Is LDI practical for taking measurements during surgery? 2) Are the
results comparable to the findings in temporal bone preparations?
and 3) Do the vibration characteristics of the stapes change after
the posterior incudal ligament is detached from the incus? Seven
patients with profound bilateral hearing loss who were undergoing
cochlear implantation were included in the study. The measurement
system was easily applicable for intraoperative measurements and
allowed contact-free analysis with very high accuracy. No major
differences in the results from the live human subjects and temporal
bone preparations were observed. The stapes movement was
predominantly pistonlike at the lower frequencies and became complex
at higher frequencies. Sacrificing the posterior incudal ligament
had no statistically significant effect on stapes vibration.
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citation
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Huber A, Linder T, Ferrazzini M, Schmid S, Dillier N, Stöckli S,
Fisch U. Intraoperative assessment of stapes movement. Ann Otol
Rhinol Laryngol 2001; 110:31-5.
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type
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journal paper/review (English)
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date of publishing
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1-2001
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journal title
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Ann Otol Rhinol Laryngol (110/1)
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ISSN print
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0003-4894
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pages
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31-5
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PubMed
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11201805
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