The Influence of Incudostapedial Joint Separation on the Middle Ear Transfer Function

Szymański, Marcin; Rusinek, Rafał; Zadrożniak, Marek; Morshed, Kamal; Warmiński, Jerzy

doi:10.3342/ceo.2014.7.4.250

Cited by 11 publications

(8 citation statements)

References 15 publications

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“…e experimental rig and methodology of experimental procedure are described in [13,14,15]. Numerical results of the 3dof system, both linear and nonlinear, are convergent with the experiment.…”

Section: Dynamics Of Normal Middle Earmentioning

confidence: 90%

Sound Transmission in the First Nonlinear Model of Middle Ear with an Active Implant

Rusinek

2020

Mathematical Problems in Engineering

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This paper shows an influence of a transducer of a middle ear implant on ear dynamics on the basis of the multi-degree-of-freedom biomechanical system. Results of numerical simulations of an ear model with implant are compared with those of the healthy middle ear. Two variants of damping are analysed. The first one typical for a normal healthy middle ear structure and the second one describes pathological properties of the human ear. Moreover, the behaviour of the transducer under various external excitations is investigated. For some set of parameters, the middle ear with the implant behaves regularly but sometimes even chaotically in case of strong excitation.

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Section: Dynamics Of Normal Middle Earmentioning

confidence: 90%

Sound Transmission in the First Nonlinear Model of Middle Ear with an Active Implant

Rusinek

2020

Mathematical Problems in Engineering

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“…In clinical settings, the impact of disarticulations on the efficiency of sound transmission is largely unknown due to the scarcity of literature reporting on manipulations of the intact ossicular chain. There is one previous study reporting hearing outcomes using the incus repositioning technique which suggested that real life manipulations of the intact ossicular chain is not as efficient as suggested by the theoretical values obtained in experimental settings 19–22 . In their study, May & Klein reported that 14% of patients presented with a 15‐dB or more air‐bone conduction gap following intratemporal facial nerve surgery with temporal incus removal and repositioning 12 .…”

Section: Discussionmentioning

confidence: 99%

“…There is one previous study reporting hearing outcomes using the incus repositioning technique which suggested that real life manipulations of the intact ossicular chain is not as efficient as suggested by the theoretical values obtained in experimental settings. 19 , 20 , 21 , 22 In their study, May & Klein reported that 14% of patients presented with a 15‐dB or more air‐bone conduction gap following intratemporal facial nerve surgery with temporal incus removal and repositioning. 12 In the present study, 1 out of 14 patients (7%) with the incus repositioning technique demonstrated an air‐bone conduction gap exceeding 20 dB, agreeing with the previous result.…”

Section: Discussionmentioning

confidence: 99%

Frequency‐dependent hearing outcomes with or without preservation of intact ossicular articulations

Inagaki

Takahashi

Murakami

2022

Laryngoscope Investig Oto

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Objective: To determine the frequency-specific benefits of ossicular chain preservation compared to performing disarticulations and reconstructions in transmastoid facial nerve decompression surgery in patients with an intact ossicular chain.Methods: A retrospective chart review (January 2007 and June 2018) of patients undergoing transmastoid facial nerve decompression on the intact middle ear for severe facial palsy at a tertiary referral center. Surgery was performed with ossicular chain disarticulation on an as-needed basis using either ossicular chain preservation (without ossicular disarticulation), incudostapedial separation, or incus disarticulation technique. Hearing outcomes were assessed. Results:The 108 patients were included in this study. Among these, 89 patients underwent ossicular chain preservation, 5 underwent incudostapedial separation and 14 underwent incus repositioning. The proportion of patients with a change in the 4-frequency air conduction pure-tone average of less than 10 dB was 91%, 60%, and 50%, respectively, for the three surgical techniques; these were significantly different (Fisher's exact test, p < .001). Frequency-specific analysis showed that air conduction was significantly better following the ossicular chain preservation technique compared with the incus repositioning technique at stimulation frequencies lower than 250 Hz and higher than 2000 Hz, and compared with the incudostapedial separation technique at 4000 Hz. Analysis of biometric measures determined on CT images suggested that the feasibility of the ossicular chain preservation technique correlates with incus body thickness on coronal CT images.Conclusions: Ossicular chain preservation is an effective approach for hearing preservation in transmastoid facial nerve decompression or similar surgical procedures.

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“…Bone loss is secondary to infection, adhesive otitis media, cholesteatoma, trauma, chronic Eustachian tube dysfunction, erosion from a prosthesis, or the inimical habitat of the chronic ear. Ossicular discontinuity results in significant conductive or mixed hearing loss (1,2).…”

Section: Introductionmentioning

confidence: 99%

Long-Term Hearing Results of Endoskeletal Ossicular Reconstruction in Chronic Ears Using Titanium Prostheses Having a Helical Coil: Part 1—Kraus K-Helix Crown, Incus to Stapes

et al. 2022

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Objectives1) To assess long-term hearing results after endoskeletal ossicular chain reconstruction (eOCR) using the titanium Kraus K-Helix Crown prosthesis, implanted incus to stapes, with glass-ionomer cement (GIC) in chronic ears and 2) to determine safety of the prosthesis and cement.Study DesignProspective, nonrandomized, sequential, single center, single surgeon.SettingPrivate practice, ambulatory surgical center.PatientsN = 15 males (42%) and 21 females (58%). Mean age was 40.4 years (range, 6–81 years); 38 ears (22 right ears [58%] and 16 left ears [42%]).InterventionseOCR in chronic ears. Comprehensive preoperative and postoperative hearing measurements were performed for up to 9 years.Main Outcome MeasuresPostoperative hearing results at 1 year showed statistically significant improvement as compared with preoperative hearing. Long-term hearing results remained stable and showed no statistically significant change over 9 years.ResultsEstimated mean pure-tone air conduction average improved by 14.5 dB (95% confidence interval = 10.3–18.7). Estimated mean speech reception thresholds improved by 15.5 dB (10.8–20.2). Word recognition scores improved by −2.2% (−5.3 to 1.0). The estimated mean postoperative air–bone gap was 10.5 dB (7.2–13.8). The estimated mean calculated air–bone gap was 11.3 dB (8.0–14.5). The estimated mean change in high-tone bone conduction (HTBC) average was +3.5 dB (0.9–6.0). Two prostheses extruded (5%). No patients experienced any unanticipated serious adverse effects or events.ConclusioneOCR using the K-Helix Crown prosthesis, incus to stapes, and GIC can significantly improve hearing at 1 year and maintain stable hearing over 9 years. Both prosthesis and cement are safe.

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The Influence of Incudostapedial Joint Separation on the Middle Ear Transfer Function

Cited by 11 publications

References 15 publications

Sound Transmission in the First Nonlinear Model of Middle Ear with an Active Implant

Sound Transmission in the First Nonlinear Model of Middle Ear with an Active Implant

Frequency‐dependent hearing outcomes with or without preservation of intact ossicular articulations

Long-Term Hearing Results of Endoskeletal Ossicular Reconstruction in Chronic Ears Using Titanium Prostheses Having a Helical Coil: Part 1—Kraus K-Helix Crown, Incus to Stapes

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