Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | World Congress on Medical Physics and Biomedical Engineering 2006 |
| Untertitel | August 27 – September 1, 2006 COEX Seoul, Korea “Imaging the Future Medicine” |
| Herausgeber/-innen | Sun I. Kim, Tae Suk Suh |
| Herausgeber (Verlag) | Springer Verlag |
| Seiten | 139-141 |
| Seitenumfang | 3 |
| Auflage | 1 |
| ISBN (Print) | 9783540368397 |
| Publikationsstatus | Veröffentlicht - 2007 |
| Veranstaltung | 10th World Congress on Medical Physics and Biomedical Engineering, WC 2006 - Seoul, Südkorea Dauer: 27 Aug. 2006 → 1 Sept. 2006 |
Publikationsreihe
| Name | IFMBE Proceedings |
|---|---|
| Nummer | 1 |
| Band | 14 |
| ISSN (Print) | 1680-0737 |
| ISSN (elektronisch) | 1433-9277 |
Abstract
In order to improve new materials as middle ear prostheses, a method for evaluation of transfer function of these materials had to be developed. The measurements were performed in three stages. First, a mechanical middle ear model was designed which should simulate the mechanical and acoustical characteristics of intact middle ear. In this model different commercial prostheses and newly developed implants were measured by means of Laser Doppler Velocimetry (LDV). To control the stiffness of the system, we used Tympanometry as well as Multi-Frequency Tympanometry (MFT). In the second and third stages the same evaluations were followed in fresh human temporal bones as well as in animal experiments. The measurements in the mechanical middle ear model indicated a good comparability with the transfer function of the intact middle ear, particularly up to resonance frequency of the middle ear, which was about 1200-1500 Hz. The influences of mass and stiffness could be determined appropriately using the middle ear model. The measurements with different prostheses resulted in no significant variations in the transfer functions of commercial and new implants. The results of experiments on fresh temporal bones again showed no significant variation in the transfer functions of different prostheses. A median damping of about 15 to 20 dB particularly beyond the resonance frequency was measured using implanted prostheses relative to the transfer function of the intact ossicular chain. Also the results of MFT measurements in animals on the implanted and non-implanted side (300 days postoperative) will be presented.
ASJC Scopus Sachgebiete
- Chemische Verfahrenstechnik (insg.)
- Bioengineering
- Ingenieurwesen (insg.)
- Biomedizintechnik
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World Congress on Medical Physics and Biomedical Engineering 2006: August 27 – September 1, 2006 COEX Seoul, Korea “Imaging the Future Medicine”. Hrsg. / Sun I. Kim; Tae Suk Suh. 1. Aufl. Springer Verlag, 2007. S. 139-141 (IFMBE Proceedings; Band 14, Nr. 1).
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Functional evaluation of middle ear prostheses
AU - Mojallal, Hamidreza
AU - Stieve, M.
AU - Turck, C.
AU - Krüger, Ilka
AU - Witteck, N.
AU - Süß, B.
AU - Mueller, P. P.
AU - Behrens, Peter
AU - Lenarz, T.
PY - 2007
Y1 - 2007
N2 - In order to improve new materials as middle ear prostheses, a method for evaluation of transfer function of these materials had to be developed. The measurements were performed in three stages. First, a mechanical middle ear model was designed which should simulate the mechanical and acoustical characteristics of intact middle ear. In this model different commercial prostheses and newly developed implants were measured by means of Laser Doppler Velocimetry (LDV). To control the stiffness of the system, we used Tympanometry as well as Multi-Frequency Tympanometry (MFT). In the second and third stages the same evaluations were followed in fresh human temporal bones as well as in animal experiments. The measurements in the mechanical middle ear model indicated a good comparability with the transfer function of the intact middle ear, particularly up to resonance frequency of the middle ear, which was about 1200-1500 Hz. The influences of mass and stiffness could be determined appropriately using the middle ear model. The measurements with different prostheses resulted in no significant variations in the transfer functions of commercial and new implants. The results of experiments on fresh temporal bones again showed no significant variation in the transfer functions of different prostheses. A median damping of about 15 to 20 dB particularly beyond the resonance frequency was measured using implanted prostheses relative to the transfer function of the intact ossicular chain. Also the results of MFT measurements in animals on the implanted and non-implanted side (300 days postoperative) will be presented.
AB - In order to improve new materials as middle ear prostheses, a method for evaluation of transfer function of these materials had to be developed. The measurements were performed in three stages. First, a mechanical middle ear model was designed which should simulate the mechanical and acoustical characteristics of intact middle ear. In this model different commercial prostheses and newly developed implants were measured by means of Laser Doppler Velocimetry (LDV). To control the stiffness of the system, we used Tympanometry as well as Multi-Frequency Tympanometry (MFT). In the second and third stages the same evaluations were followed in fresh human temporal bones as well as in animal experiments. The measurements in the mechanical middle ear model indicated a good comparability with the transfer function of the intact middle ear, particularly up to resonance frequency of the middle ear, which was about 1200-1500 Hz. The influences of mass and stiffness could be determined appropriately using the middle ear model. The measurements with different prostheses resulted in no significant variations in the transfer functions of commercial and new implants. The results of experiments on fresh temporal bones again showed no significant variation in the transfer functions of different prostheses. A median damping of about 15 to 20 dB particularly beyond the resonance frequency was measured using implanted prostheses relative to the transfer function of the intact ossicular chain. Also the results of MFT measurements in animals on the implanted and non-implanted side (300 days postoperative) will be presented.
KW - Brainstem electrical response audiometry (BERA)
KW - Laser Doppler Velocimetry (LDV)
KW - Mechanical middle ear model
KW - Middle ear prostheses
KW - Multi- frequency tympanometry (MFT)
UR - http://www.scopus.com/inward/record.url?scp=84953205279&partnerID=8YFLogxK
U2 - 10.1007/978-3-540-36841-0_42
DO - 10.1007/978-3-540-36841-0_42
M3 - Conference contribution
AN - SCOPUS:84953205279
SN - 9783540368397
T3 - IFMBE Proceedings
SP - 139
EP - 141
BT - World Congress on Medical Physics and Biomedical Engineering 2006
A2 - Kim, Sun I.
A2 - Suh, Tae Suk
PB - Springer Verlag
T2 - 10th World Congress on Medical Physics and Biomedical Engineering, WC 2006
Y2 - 27 August 2006 through 1 September 2006
ER -