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Han H, Wang L, Zhu Y, Liu Z, Sun Y, Wang J, Wang L, Xiang S, Shi H, Ding Q. Finite element analysis of conductive hearing loss caused by fixation and detachment of ligament and tendon in the middle ear. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2023; 236:107540. [PMID: 37086583 DOI: 10.1016/j.cmpb.2023.107540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 03/23/2023] [Accepted: 04/05/2023] [Indexed: 05/03/2023]
Abstract
BACKGROUND AND OBJECTIVE The fixation of ligament and tendon of the middle ear often occurs after chronic otitis media surgery. However, there are relatively few studies on the effect of ligament and tendon on sound transmission in the human middle ear. Here, the finite element model and lumped parameter model are used to study the effect of ligament and tendon fixation and detachment on sound transmission in human ear. METHODS In this paper, the finite element model including the external auditory canal, middle ear and simplified inner ear is used to calculate and compare the middle ear frequency response of the normal and tympanosclerosis under pure tone stimulation. In addition, the lumped parametric model is taken into account to illustrate the effect of ligament and tendon stiffness on the human ear transmission system. RESULTS The results indicate that the motion of the tympanic membrane and stapes is reduced by ligament and tendon fixation. Although ligament and tendon detachment have a limited effect in the piston-motion direction, the stability of motion in the plane perpendicular to the piston-motion direction is significantly reduced. Most significantly, the ligament and tendon fixation cause a hearing effect of about 18 dB, which is greater in the plane perpendicular to the piston-motion direction after ligament and tendon detachment than in the piston-motion direction. CONCLUSIONS In this study, the calculation accuracy of the lumped parameter and the finite element model is studied, and the effect of ligament and tendon on hearing loss is further explored through the finite element model with high calculation accuracy, which is helpful to understand the role of ligament and tendon in the sound transmission mechanism of the human middle ear. The study of ligament and tendon on conductive hearing loss provides a reference for clinical treatment of tympanosclerosis.
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Affiliation(s)
- Hongge Han
- Department of Mechanics and Tianjin Key Laboratory of Nonlinear Dynamics and Control, Tianjin University, Tianjin 300350, China
| | - Liang Wang
- Department of Mechanics and Tianjin Key Laboratory of Nonlinear Dynamics and Control, Tianjin University, Tianjin 300350, China
| | - Yueting Zhu
- Department of Otolaryngology, Head and Neck Surgery, Tianjin Children's Hospital, Tianjin University, Tianjin 300400, China
| | - Zhanli Liu
- School of Aerospace Engineering, Tsinghua University, Beijing 100084, China
| | - Yongtao Sun
- Department of Mechanics and Tianjin Key Laboratory of Nonlinear Dynamics and Control, Tianjin University, Tianjin 300350, China.
| | - Jie Wang
- Department of Otolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Key Laboratory of Otolaryngology Head and Neck Surgery, Ministry of Education, Beijing 100730, China; Beijing Engineering Research Center of Audiological Technology, Beijing 100730, China
| | - Lele Wang
- Department of Mechanics and Tianjin Key Laboratory of Nonlinear Dynamics and Control, Tianjin University, Tianjin 300350, China
| | - Shuyi Xiang
- School of Aerospace Engineering, Tsinghua University, Beijing 100084, China
| | - Huibin Shi
- School of Aerospace Engineering, Tsinghua University, Beijing 100084, China
| | - Qian Ding
- Department of Mechanics and Tianjin Key Laboratory of Nonlinear Dynamics and Control, Tianjin University, Tianjin 300350, China
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Sackmann B, Eberhard P, Lauxmann M. Parameter Identification From Normal and Pathological Middle Ears Using a Tailored Parameter Identification Algorithm. J Biomech Eng 2022; 144:1119456. [PMID: 34505125 DOI: 10.1115/1.4052371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Indexed: 11/08/2022]
Abstract
Current clinical practice is often unable to identify the causes of conductive hearing loss in the middle ear with sufficient certainty without exploratory surgery. Besides the large uncertainties due to interindividual variances, only partially understood cause-effect principles are a major reason for the hesitant use of objective methods such as wideband tympanometry in diagnosis, despite their high sensitivity to pathological changes. For a better understanding of objective metrics of the middle ear, this study presents a model that can be used to reproduce characteristic changes in metrics of the middle ear by altering local physical model parameters linked to the anatomical causes of a pathology. A finite-element model is, therefore, fitted with an adaptive parameter identification algorithm to results of a temporal bone study with stepwise and systematically prepared pathologies. The fitted model is able to reproduce well the measured quantities reflectance, impedance, umbo and stapes transfer function for normal ears and ears with otosclerosis, malleus fixation, and disarticulation. In addition to a good representation of the characteristic influences of the pathologies in the measured quantities, a clear assignment of identified model parameters and pathologies consistent with previous studies is achieved. The identification results highlight the importance of the local stiffness and damping values in the middle ear for correct mapping of pathological characteristics and address the challenges of limited measurement data and wide parameter ranges from the literature. The great sensitivity of the model with respect to pathologies indicates a high potential for application in model-based diagnosis.
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Affiliation(s)
- Benjamin Sackmann
- Reutlingen Research Institute, Reutlingen University, Reutlingen 72762, Germany
| | - Peter Eberhard
- Institute of Engineering and Computational Mechanics, University of Stuttgart, Stuttgart 70569, Germany
| | - Michael Lauxmann
- School of Engineering, Reutlingen University, Reutlingen 72762, Germany
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Calero D, Lobato L, Paul S, Cordioli JA. Analysis of the Human Middle Ear Dynamics Through Multibody Modeling. J Biomech Eng 2020; 142:071012. [PMID: 32191261 DOI: 10.1115/1.4046689] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Indexed: 11/08/2022]
Abstract
The dynamics of the human middle ear (ME) has been studied in the past using several computational and experimental approaches in order to observe the effect on hearing of different conditions, such as conductive disease, corrective surgery, or implantation of a middle ear prosthesis. Multibody (MB) models combine the analysis of flexible structures with rigid body dynamics, involving fewer degrees-of-freedom (DOF) than finite element (FE) models, but a more detailed description than traditional 1D lumped parameter (LP) models. This study describes the reduction of a reference FE model of the human middle ear to a MB model and compares the results obtained considering different levels of model simplification. All models are compared by means of the frequency response of the stapes velocity versus sound pressure at the tympanic membrane (TM), as well as the system natural frequencies and mode shapes. It can be seen that the flexibility of the ossicles has a limited impact on the system frequency response function (FRF) and modes, and the stiffness of the tendons and ligaments only plays a role when above certain levels. On the other hand, the restriction of the stapes footplate movement to a piston-like behavior can considerably affect the vibrational modes, while constraints to the incudomalleolar joint (IMJ) and incudostapedial joint (ISJ) can have a strong impact on the system FRF.
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Affiliation(s)
- Diego Calero
- Acoustical and Vibration Laboratory, Department of Mechanical Engineering, Federal University of Santa Catarina, Florianópolis, SC 88040-900, Brazil
| | - Lucas Lobato
- Acoustical and Vibration Laboratory, Department of Mechanical Engineering, Federal University of Santa Catarina, Florianópolis, SC 88040-900, Brazil
| | - Stephan Paul
- Department of Mechanical Engineering, Acoustical and Vibration Laboratory, Federal University of Santa Catarina, Florianópolis, SC 88040-900, Brazil
| | - Júlio A Cordioli
- Acoustical and Vibration Laboratory, Department of Mechanical Engineering, Federal University of Santa Catarina, Florianópolis, SC 88040-900, Brazil
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Zhang J, Jiao C, Zou D, Ta N, Rao Z. Assigning viscoelastic and hyperelastic properties to the middle-ear soft tissues for sound transmission. Biomech Model Mechanobiol 2019; 19:957-970. [DOI: 10.1007/s10237-019-01263-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Accepted: 11/12/2019] [Indexed: 12/31/2022]
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Zhang J, Tian J, Ta N, Rao Z. Transient response of the human ear to impulsive stimuli: A finite element analysis. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2018; 143:2768. [PMID: 29857768 DOI: 10.1121/1.5026240] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nowadays, the steady-state responses of human ear to pure tone stimuli have been widely studied. However, the temporal responses to transient stimuli have not been investigated systematically to date. In this study, a comprehensive finite element (FE) model of the human ear is used to investigate the transient characteristics of the human ear in response to impulsive stimuli. There are two types of idealized impulses applied in the FE analysis: the square wave impulse (a single positive pressure waveform) and the A-duration wave impulse (both of positive and negative pressure waveforms). The time-domain responses such as the displacements of the tympanic membrane (TM), the stapes footplate (SF), the basilar membrane (BM), the TM stress distribution, and the cochlea input pressure are derived. The results demonstrate that the TM motion has the characteristic of spatial differences, and the umbo displacement is smaller than other locations. The cochlea input pressure response is synchronized with the SF acceleration response while the SF displacement response appears with some time delay. The BM displacement envelope is relatively higher in the middle cochlea and every portion of BM vibrates at its best frequency approximately. The present results provide a good understanding of the transient response of the human ear.
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Affiliation(s)
- Jing Zhang
- Institute of Vibration, Shock and Noise, State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jiabin Tian
- Institute of Vibration, Shock and Noise, State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Na Ta
- Institute of Vibration, Shock and Noise, State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zhushi Rao
- Institute of Vibration, Shock and Noise, State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China
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Tachos NS, Sakellarios AI, Rigas G, Isailovic V, Ni G, Bohnke F, Filipovic N, Bibas T, Fotiadis DI. Middle and inner ear modelling: from microCT images to 3D reconstruction and coupling of models. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2017; 2016:5961-5964. [PMID: 28269610 DOI: 10.1109/embc.2016.7592086] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We present finite element (FE) modeling approaches of ear mechanics including 3-dimensional (3D) reconstruction of the human middle and inner ear. Specifically, we demonstrate a semi-automatic methodology for the 3D reconstruction of the inner ear structures, a FE harmonic response model of the middle ear to predict the stapes footplate frequency response, a 2D FE slice model of the cochlea for the coupled response at the micromechanical level for either acoustic or electrical excitation and a coupled FE middle ear model with a simplified cochlea box model to simulate the basilar membrane velocity in response to acoustic excitation. The proposed methodologies are validated against experimental and literature data and the results are in good agreement.
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WU CAN, NI JING, YANG XIAO, LANG JIANRONG. RESEARCH ON THE TYMPANIC MEMBRANE FREE VIBRATION MODEL BASED ON THIN PLATE THEORY. J MECH MED BIOL 2017. [DOI: 10.1142/s0219519417500798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Myringoplasty is one of the routine surgeries in the treatment of tympanic membrane (TM) perforation. Since the anatomic structure of the middle ear cannot be simulated in clinical treatment, the surgery is mainly directed by experiences. Based on the mechanical properties of TM in the anatomy, four hypotheses are presented and TM is simplified as a sectorial annulus plate with fixed boundary condition. This paper proposes a free vibration model of TM. Its natural frequencies of free vibration are obtained by variables separation method and Bessel function. The system of fundamental solutions of fourth-order homogeneous equations can be solved for the analytical expressions of corresponding natural vibration mode. The theoretical model is proved to be valid since the natural frequency of the model is consistent with the experimental data. The effect of geometric parameters and material parameters on TM natural frequency is subsequently discussed in the numerical examples. Especially, the diameter and thickness of TM will cause different natural frequency errors above 40%, while the Young’s modulus and density of TM cause errors below 15% as well.
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Affiliation(s)
- CAN WU
- Department of Mechanical Engineering Hangzhou Dianzi University, Hangzhou, Zhejiang 310018, P. R. China
| | - JING NI
- Department of Mechanical Engineering Hangzhou Dianzi University, Hangzhou, Zhejiang 310018, P. R. China
| | - XIAO YANG
- Department of Mechanical Engineering Hangzhou Dianzi University, Hangzhou, Zhejiang 310018, P. R. China
| | - JIANRONG LANG
- Department of Mechanical Engineering Hangzhou Dianzi University, Hangzhou, Zhejiang 310018, P. R. China
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Alper CM, Luntz M, Takahashi H, Ghadiali SN, Swarts JD, Teixeira MS, Csákányi Z, Yehudai N, Kania R, Poe DS. Panel 2: Anatomy (Eustachian Tube, Middle Ear, and Mastoid-Anatomy, Physiology, Pathophysiology, and Pathogenesis). Otolaryngol Head Neck Surg 2017; 156:S22-S40. [PMID: 28372527 DOI: 10.1177/0194599816647959] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Objective In this report, we review the recent literature (ie, past 4 years) to identify advances in our understanding of the middle ear-mastoid-eustachian tube system. We use this review to determine whether the short-term goals elaborated in the last report were achieved, and we propose updated goals to guide future otitis media research. Data Sources PubMed, Web of Science, Medline. Review Methods The panel topic was subdivided, and each contributor performed a literature search within the given time frame. The keywords searched included middle ear, eustachian tube, and mastoid for their intersection with anatomy, physiology, pathophysiology, and pathology. Preliminary reports from each panel member were consolidated and discussed when the panel met on June 11, 2015. At that meeting, the progress was evaluated and new short-term goals proposed. Conclusions Progress was made on 13 of the 20 short-term goals proposed in 2011. Significant advances were made in the characterization of middle ear gas exchange pathways, modeling eustachian tube function, and preliminary testing of treatments for eustachian tube dysfunction. Implications for Practice In the future, imaging technologies should be developed to noninvasively assess middle ear/eustachian tube structure and physiology with respect to their role in otitis media pathogenesis. The new data derived from these structure/function experiments should be integrated into computational models that can then be used to develop specific hypotheses concerning otitis media pathogenesis and persistence. Finally, rigorous studies on medical or surgical treatments for eustachian tube dysfunction should be undertaken.
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Affiliation(s)
- Cuneyt M Alper
- 1 Department of Pediatric Otolaryngology, Children's Hospital of Pittsburgh of University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA.,2 Department of Otolaryngology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.,3 Clinical and Translational Science Institute, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Michal Luntz
- 4 Department of Otolaryngology Head and Neck Surgery, Bnai Zion Medical Center; Technion-The Ruth and Bruce Rappaport Faculty of Medicine, Haifa, Israel
| | - Haruo Takahashi
- 5 Department of Otolaryngology-Head and Neck Surgery, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Samir N Ghadiali
- 6 Department of Biomedical Engineering, Ohio University, Columbus, Ohio, USA.,7 Department of Internal Medicine, Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Ohio University, Columbus, Ohio, USA
| | - J Douglas Swarts
- 2 Department of Otolaryngology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Miriam S Teixeira
- 2 Department of Otolaryngology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Zsuzsanna Csákányi
- 8 Department of Pediatric Otorhinolaryngology, Heim Pal Children's Hospital, Budapest, Hungary
| | - Noam Yehudai
- 4 Department of Otolaryngology Head and Neck Surgery, Bnai Zion Medical Center; Technion-The Ruth and Bruce Rappaport Faculty of Medicine, Haifa, Israel
| | - Romain Kania
- 9 Department of Otorhinolaryngology-Head and Neck Surgery, Lariboisière Hospital, Diderot University, University Paris Sorbonne, Paris, France
| | - Dennis S Poe
- 10 Department of Otology and Laryngology, Harvard Medical School, Boston Children's Hospital, Boston, Massachusetts, USA.,11 Department of Otolaryngology and Communications Enhancement, Boston Children's Hospital, Boston, Massachusetts, USA
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Xu D, Liu H, Zhou L, Cheng G, Yang J, Huang X, Liu X. The effect of actuator and its coupling conditions on eardrum-stimulated middle ear implants: A numerical analysis. Proc Inst Mech Eng H 2016. [DOI: 10.1177/0954411916675381] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Consisting of the actuator and coupling layer, a finite element model of the human middle ear was used to analyze the effect of the actuator and its coupling conditions on the performance of the eardrum-stimulated middle ear implants. This model which was based on the right ear of a healthy adult was built via microcomputed tomography imaging and the technique of reverse engineering. Based on this finite element model, the linear viscoelasticity of the human middle ear soft tissues and three-layer structure of the eardrum pars tensa which was orthotropic were considered. The validity of the model was verified by comparing the model calculated results with experimental data. After that, the influence of the three main design parameters of the actuator and two aspects of the coupling layer were investigated by the finite element model. The results show that (1) the manubrium tip is the optimal position for the actuator to stimulate; (2) the increased cross-section of the actuator would worsen its hearing compensation performance, especially in the low frequencies; (3) both the patients’ residual hearing and the actuator’s hearing compensation performance at high frequencies will be deteriorated with the increase in the actuator’s mass; and (4) a coupling layer with a small Young’s modulus and an area approximating 80% of the eardrum would reduce the stress of the eardrum effectively.
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Affiliation(s)
- Dan Xu
- School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou, P.R. China
| | - Houguang Liu
- School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou, P.R. China
| | - Lei Zhou
- Department of Otorhinolaryngology-Head and Neck Surgery, Shanghai Zhongshan Hospital, Fudan University, Shanghai, P.R. China
| | - Gang Cheng
- School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou, P.R. China
| | - Jianhua Yang
- School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou, P.R. China
| | - Xinsheng Huang
- Department of Otorhinolaryngology-Head and Neck Surgery, Shanghai Zhongshan Hospital, Fudan University, Shanghai, P.R. China
| | - Xiaole Liu
- School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou, P.R. China
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Wu C, Chen Y, Al-Furjan MSH, Ni J, Yang X. Free vibration model and theoretical solution of the tympanic membrane. Comput Assist Surg (Abingdon) 2016. [DOI: 10.1080/24699322.2016.1240315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Affiliation(s)
- Can Wu
- Department of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou, Zhejiang, China
| | - Ying Chen
- School of Business Administration, Zhejiang University of Finance and Economics, Hangzhou, Zhejiang, China
| | - M. S. H. Al-Furjan
- Department of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou, Zhejiang, China
| | - Jing Ni
- Department of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou, Zhejiang, China
| | - Xiao Yang
- Department of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou, Zhejiang, China
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De Greef D, Goyens J, Pintelon I, Bogers JP, Van Rompaey V, Hamans E, Van de Heyning P, Dirckx JJ. On the connection between the tympanic membrane and the malleus. Hear Res 2016; 340:50-59. [DOI: 10.1016/j.heares.2015.12.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 12/02/2015] [Accepted: 12/03/2015] [Indexed: 02/08/2023]
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12
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Spiridon IF, Sakellarios AI, Rigas GA, Tagaris A, Bellos CV, Bibas A, Bohnke F, Iliopoulou D, Koutsouris D, Fotiadis DI. Effect of modeling parameters on the frequency response of the middle ear by means of finite element analysis. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2015; 2015:925-928. [PMID: 26736414 DOI: 10.1109/embc.2015.7318514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A 3D finite element model of the human middle ear was developed for the investigation of the modeling parameters' effect on the frequency response. In this study, we incorporated realistic reconstructed geometries from microCT imaging data. The geometric representation of the stapedial annular ligament provided additional damping and the Rayleigh parameter β was adjusted to lower values in comparison to previous computational studies. The maximum displacement of the stapes footplate, equal to 0.168 μm, was observed at a frequency of 1050 Hz. The computational results were validated with experimental measurements. Good agreement is observed between our results and the experimental data and other finite element studies.
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De Greef D, Buytaert JA, Aerts JR, Van Hoorebeke L, Dierick M, Dirckx J. Details of human middle ear morphology based on micro-CT imaging of phosphotungstic acid stained samples. J Morphol 2015; 276:1025-46. [DOI: 10.1002/jmor.20392] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 03/08/2015] [Accepted: 03/13/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Daniel De Greef
- Laboratory of Biomedical Physics; Department of Physics, University of Antwerp, Groenenborgerlaan 171; 2020 Antwerp Belgium
| | - Jan A.N. Buytaert
- Laboratory of Biomedical Physics; Department of Physics, University of Antwerp, Groenenborgerlaan 171; 2020 Antwerp Belgium
| | - Johan R.M. Aerts
- Laboratory of Biomedical Physics; Department of Physics, University of Antwerp, Groenenborgerlaan 171; 2020 Antwerp Belgium
| | - Luc Van Hoorebeke
- UGCT, Department of Physics and Astronomy; Ghent University, Proeftuinstraat 86; 9000 Ghent Belgium
| | - Manuel Dierick
- UGCT, Department of Physics and Astronomy; Ghent University, Proeftuinstraat 86; 9000 Ghent Belgium
| | - Joris Dirckx
- Laboratory of Biomedical Physics; Department of Physics, University of Antwerp, Groenenborgerlaan 171; 2020 Antwerp Belgium
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Ahn TS, Baek MJ, Lee D. Experimental measurement of tympanic membrane response for finite element model validation of a human middle ear. SPRINGERPLUS 2013; 2:527. [PMID: 24171153 PMCID: PMC3806984 DOI: 10.1186/2193-1801-2-527] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Accepted: 10/07/2013] [Indexed: 11/16/2022]
Abstract
The middle ear consists of a tympanic membrane, ligaments, tendons, and three ossicles. An important function of the tympanic membrane is to deliver exterior sound stimulus to the ossicles and inner ear. In this study, the responses of the tympanic membrane in a human ear were measured and compared with those of a finite element model of the middle ear. A laser Doppler vibrometer (LDV) was used to measure the dynamic responses of the tympanic membrane, which had the measurement point on the cone of light of the tympanic membrane. The measured subjects were five Korean male adults and a cadaver. The tympanic membranes were stimulated using pure-tone sine waves at 18 center frequencies of one-third octave band over a frequency range of 200 Hz ~10 kHz with 60 and 80 dB sound pressure levels. The measured responses were converted into the umbo displacement transfer function (UDTF) with a linearity assumption. The measured UDTFs were compared with the calculated UDTFs using a finite element model for the Korean human middle ear. The finite element model of the middle ear consists of three ossicles, a tympanic membrane, ligaments, and tendons. In the finite element model, the umbo displacements were calculated under a unit sound pressure on the tympanic membrane. The UDTF of the finite element model exhibited good agreement with that of the experimental one in low frequency range, whereas in higher frequency band, the two response functions deviated from each other, which demonstrates that the finite element model should be updated with more accurate material properties and/or a frequency dependent material model.
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Affiliation(s)
- Tae-Soo Ahn
- School of Mechanical Engineering, Dongeui University, 176, Eumgwangno, Busanjin-gu, Busan 614-714 South Korea
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Ferreira A, Gentil F, Tavares JMRS. Segmentation algorithms for ear image data towards biomechanical studies. Comput Methods Biomech Biomed Engin 2012; 17:888-904. [DOI: 10.1080/10255842.2012.723700] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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