The stapes velocity transfer function (SVTF), defined as the stapes velocity divided by ear canal pressure, was calculated for all cases. In a comparison of the 3D- SVTF and its three orthogonal components for an intact and a PORP case, two features were evident: first, although the component SVTFs of the intact case have prominent localized resonances, the 3D-SVTF is smoother because those resonances occur at different frequencies.
Explore This IssueNovember 2016
The authors say this also suggests that the stapes has several different vibration modes over the measured frequency range; second, the relationship between the component SVTFs differs greatly between the intact and PORP cases, which indicates that the PORP affects not only the stapes vibration magnitude but also the vibration mode.
No significant difference was found between the acoustic performance of the new A-ORP designs and a conventional titanium PORP or an I-PORP.
Citation: Gottlieb PK, Li X, Monfared A, Blevins N, Puria S. First results of a novel adjustable-length ossicular reconstruction prosthesis in temporal bones. Laryngoscope. 2016;126: 2559–2564.