Middle ear ossicles motion at hearing thresholds with air conduction and bone conduction stimulation

2006 ◽  
Vol 119 (5) ◽  
pp. 2848-2858 ◽  
Author(s):  
Stefan Stenfelt
Keyword(s):  
Middle Ear ◽  
Bone Conduction ◽  
Hearing Thresholds ◽  
Ear Ossicles ◽  
Air Conduction

Study for the interaction between the medium in the middle ear and vibro-acoustic transmission

2021 ◽  
Vol 263 (1) ◽  
pp. 5538-5540
Author(s):  
Jeon Jonghoon ◽  
Jonghoon Jeon ◽  
Kyunglae Gu ◽  
Junhong Park
Keyword(s):  
Middle Ear ◽  
Geometric Model ◽  
Signal Transmission ◽  
Bone Conduction ◽  
Human Perception ◽  
Transmission Mechanism ◽  
Evaluation Indexes ◽  
Individual Evaluation ◽  
Priority Factor ◽  
Air Conduction

This study presented a quantitative evaluation index related to sound response for diagnosis of middle ear condition. The signal transmission paths for human perception of sound are divided into bone conduction and air conduction, respectively, depending on the path through which vibration and sound are transmitted. The components of auditory system that can affect the sound signal variability include temporal bone, ear canal, eardrum, and middle ear cavity. The specific acoustic impedances were obtained through simple geometric model of the auditory components, and the sound transmission mechanism was implemented through the outer-middle ear circuit model. The frequency range corresponding to the resonance characteristics of each components were calculated. The response difference for the medium of middle ear was confirmed by deriving frequency response function between the input sound and the output sound in the frequency domain through the transfer function method. The reliability of the algorithm was confirmed through the ROC curve, and individual evaluation indexes were derived according to the priority factor between classification accuracy and error rate.

Role of ossiculoplasty in canal wall down tympanoplasty for middle-ear cholesteatoma: hearing results

2006 ◽  
Vol 121 (4) ◽  
pp. 324-328 ◽  
Author(s):  
E De Corso ◽  
M R Marchese ◽  
B Sergi ◽  
M Rigante ◽  
G Paludetti
Keyword(s):  
Middle Ear ◽  
Bone Conduction ◽  
Consecutive Series ◽  
Canal Wall ◽  
Hearing Results ◽  
Middle Ear Cholesteatoma ◽  
Canal Wall Down ◽  
The Mean ◽  
Air Conduction ◽  
Cholesteatoma Surgery

The aim of this study was to evaluate the hearing results of ossiculoplasty in canal wall down tympanoplasty in one stage middle-ear cholesteatoma surgery.We carried out a retrospective review of a consecutive series of 142 cases which had undergone type two or three canal wall down tympanoplasty with ossicular reconstruction, between January 1995 and December 2002, due to chronic otitis media with cholesteatoma.Pre-operative audiometric testing revealed a mean air conduction pure tone average (PTA) of 50.97 dB and a mean bone conduction PTA of 22.14 dB. The mean post-operative result for air conduction PTA was 37.62 and for bone conduction PTA was 23.37 dB. The mean pre- and post-operative air–bone gaps (ABGs) were 28.83 and 13.94 dB, respectively, with a gain of 14.89 dB. Almost 62.67 per cent of patients closed their ABGs to within 20 dB.Our functional results are comparable with those of other authors. In the present study, we show that hearing improvement is possible following cholesteatoma surgery with canal wall down tympanoplasty and ossicular chain reconstruction.

Insertion of middle-ear Silastic sheeting during tympanoplasty: hearing outcomes

2010 ◽  
Vol 125 (5) ◽  
pp. 445-448 ◽  
Author(s):  
S M Elmorsy ◽  
H E Amer
Keyword(s):  
Retrospective Study ◽  
Surgical Treatment ◽  
Chronic Inflammation ◽  
Middle Ear ◽  
Bone Conduction ◽  
Chronic Otitis Media ◽  
One Year ◽  
Operative Findings ◽  
Hearing Outcomes ◽  
Air Conduction

AbstractObjective:To study the effect of Silastic®sheeting placed in the middle ear during tympanoplasty, including the effect on hearing.Design:Retrospective study.Background:Chronic inflammation of the middle ear is common. Surgical treatment sometimes results in middle-ear adhesions and hearing deterioration.Materials and methods:We selected 106 patients with chronic otitis media, middle-ear adhesions and intact ossicles, based on intra-operative findings. These patients underwent single-stage tympanoplasty either with or without insertion of Silastic sheeting. Audiometry was undertaken pre-operatively and one and 12 months post-operatively.Results:Patients who had undergone Silastic sheet insertion showed significantly better air conduction, bone conduction and air–bone gap averages one year post-operatively, compared with those who had not.

Comparing intermediate-term hearing results of NiTiBOND and Nitinol prostheses in stapes surgery

2021 ◽  
pp. 1-4
Author(s):  
A Koukkoullis ◽  
I Gerlinger ◽  
A Kovács ◽  
Z Szakács ◽  
Z Piski ◽  
...  
Keyword(s):  
Retrospective Study ◽  
Clinical Success ◽  
Bone Conduction ◽  
Hearing Results ◽  
Bone Conduction Threshold ◽  
Hearing Thresholds ◽  
Group 3 ◽  
Group 2 ◽  
Air Conduction

Abstract Objective To statistically analyse the hearing thresholds of two cohorts undergoing stapedotomy for otosclerosis with two different prostheses. Method A retrospective study was conducted comparing NiTiBOND (n = 53) and Nitinol (n = 38) prostheses. Results Average follow-up duration was 4.1 years for NiTiBOND and 4.4 years for Nitinol prostheses. The post-operative air–bone gap was 10 dB or less, indicating clinical success. The p-values for differences between (1) pre- and post-operative values in the NiTiBOND group, (2) pre- and post-operative values in the Nitinol group, (3) pre-operative values and (4) post-operative values in the two groups were: air–bone gap – p < 0.001, p < 0.001, p = 0.631 and p = 0.647; four-frequency bone conduction threshold – p = 0.076, p = 0.129, p < 0.001 and p = 0.005; four-frequency air conduction threshold – p < 0.001, p < 0.001, p = 0.043 and p = 0.041; three-frequency (1, 2 and 4 kHz) bone conduction threshold pre-operatively – p = 0.639, p = 0.495, p = 0.001 and p = 0.01; and air conduction threshold at 4 kHz: – p < 0.001, p < 0.001, p = 0.03 and p = 0.058. Conclusion Post-operative audiological outcomes for NiTiBOND and Nitinol were comparable.

Mechanism of Hearing Loss in Irradiated Ears: A Long-Term Longitudinal Study

2001 ◽  
Vol 110 (10) ◽  
pp. 904-906 ◽  
Author(s):  
Yi-Ho Young ◽  
Ying-Chih Lu
Keyword(s):  
Hearing Loss ◽  
Otitis Media ◽  
Middle Ear ◽  
Otitis Media With Effusion ◽  
Bone Conduction ◽  
Chronic Otitis Media ◽  
Pure Tone Audiometry ◽  
Tube Function ◽  
The Mean ◽  
Air Conduction

A 10-year longitudinal follow-up study of hearing was conducted in patients with nasopharyngeal carcinoma (NPC) in order to elucidate the mechanism of hearing loss in irradiated ears. Ten NPC patients were subjected to a battery of audiological tests before irradiation and 6 months, 5 years, and 10 years after irradiation. The tests included pure tone audiometry, tympanometry, eustachian tube function testing, and myringotomy to confirm middle ear effusion. The prevalences of otitis media with effusion (OME) were 25%, 25%, 40%, and 25% at the 4 testing periods described above, respectively. The prevalences of chronic otitis media were 0%, 0%, 15%, and 25%, respectively. In myringotomized ears (n = 17), the mean hearing levels for both air conduction and bone conduction were preserved from the preirradiation period to 10 years after irradiation. In contrast, in grommeted ears (n = 3), the mean hearing levels for both air conduction and bone conduction deteriorated progressively from the preirradiation period to 10 years after irradiation. We conclude that hearing can be preserved in NPC patients 10 years after irradiation if middle ear inflammation is well controlled. We do not recommend grommet insertion in irradiated NPC patients with OME, as it may result in persistent otorrhea and hearing deterioration.

Fluctuating hearing loss in presbyacusis

1988 ◽  
Vol 102 (1) ◽  
pp. 25-26
Author(s):  
F. W. Martin ◽  
R. W. Ruckley
Keyword(s):  
Hearing Loss ◽  
Middle Ear ◽  
Bone Conduction ◽  
Simple Explanation ◽  
Subjective Improvement ◽  
Middle Ear Pressure ◽  
Before And After ◽  
Valsalva's Manoeuvre ◽  
Fluctuating Hearing Loss ◽  
Air Conduction

AbstractThirty-six patients with bilateral symmetrical presbyacusis who reported a temporary improvement in the hearing of one ear following a Valsalva's manoeuvre were further investigated. Bone conduction and air conduction thresholds, middle ear pressure and middle ear compliance were measured before and after Valsalva's manoeuvre in the ears which had a subjective improvement in hearing following auto-inflation. Bone conduction thresholds remained unaltered in 66 per cent of ears while average air conduction thresholds varied by less than 5 decibels. Middle ear pressure was unchanged in over half the ears tested and in 81 per cent of the ears there was no change in middle ear compliance. There appears to be no simple explanation for the temporary subjective fluctuation in hearing reported by patients with presbyacusis.

scholarly journals Extended high-frequency audiometry in healthy adults with different age groups

2021 ◽  
Vol 50 (1) ◽  
Author(s):  
Mingming Wang ◽  
Yu Ai ◽  
Yuechen Han ◽  
Zhaomin Fan ◽  
Peng Shi ◽  
...  
Keyword(s):  
High Frequency ◽  
Pure Tone ◽  
Bone Conduction ◽  
Hearing Threshold ◽  
Healthy Population ◽  
Age Group ◽  
Hearing Ability ◽  
Hearing Thresholds ◽  
High Frequency Audiometry ◽  
Air Conduction

Abstract Background It was well-documented that extended high-frequency (EHF, above 8 kHz) hearing test could be more sensitive comparing with the conventional measurement on frequency below 8 kHz, regarding the early prediction of auditory damage in certain population. However, hardly any age-specific thresholds of EHF in population with normal hearing ability were observed. This study aims to monitor the age-dependent hearing thresholds at EHF (from 9 to 20 kHz) in healthy hearing population. Methods A total of 162 healthy participants (from 21 to 70 years) with normal conventional pure tone audiograms were recruited and separated into five groups by age. Conventional pure tone average was performed with frequencies from 0.25 to 8 kHz under air conduction and from 0.25 to 4 kHz under bone conduction. EHF audiometry from 9 to 20 kHz was determined under air conduction. Results The effects of aging on hearing were evident at frequencies above 4 kHz. The hearing thresholds of EHF were less than 26 dB HL before 30 years-olds. Hearing abilities in EHF were deteriorated starting from the 31 ~ 40 group and were most obvious in the 51 ~ 60 group and the 61 ~ 70 group with the maximum thresholds of 75 dB HL. Sensitivity of EHF was inversely proportional to the frequency within each age group, and to age among groups. Subjects under 30 years old were totally responsive up to 16 kHz, and 52.2% could respond to 20 kHz. Meanwhile, no responsiveness was recorded to 20 kHz in the 51 ~ 60 group and even to 18 kHz in the 61 ~ 70 group. No gender differences in hearing threshold was observed within each age group, except an obvious decline at frequencies of 4, 6, 8, and 9 kHz in male participants of the 41 ~ 50 group. Conclusions Hearing thresholds at EHF from 9 to 20 kHz were more sensitive than at frequencies below 8 kHz for hearing measurement, and aging inversely affected hearing ability at EHF in healthy population. Hearing thresholds at EHF deteriorated with age and raising frequency, while the upper frequency limit decreased with aging. Graphical abstract

scholarly journals Bone-conduction threshold and air-bone gap may predict frequency-specific air-conduction threshold after tympanoplasty

PLoS ONE ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. e0248421
Author(s):  
Ethan I. Huang ◽  
Yu-Chieh Wu ◽  
Hsiu-Mei Chuang ◽  
Tzu-Chi Huang
Keyword(s):  
Middle Ear ◽  
Bone Conduction ◽  
Disease Process ◽  
Hearing Improvement ◽  
Exclusion Criteria ◽  
Bone Conduction Threshold ◽  
Estimate Frequency ◽  
Quantitative Statistics ◽  
Preoperative Predictors ◽  
Air Conduction

Postoperative hearing improvement is one of the main expectations for patients receiving tympanoplasty. The capacity to predict postoperative hearing may help to counsel a patient properly and avoid untoward expectations. It is difficult to predict postoperative hearing without knowing the disease process in the middle ear, which can only be assessed intraoperatively. However, the duration and extent of the underlying pathologies may represent in bone-conduction threshold and air-bone gap. Here in patients undergoing tympanoplasty without ossiculoplasty, we sorted and separated the surgery dates into the first group to build the predicting models and the second group to test the predictions. There were 87 and 30 ears, respectively. No specific enrollment or exclusion criteria were based on underlying pathologies such as the perforation size of the tympanic membrane or the middle ear conditions. The results show that bone-conduction threshold and air-bone gap together predicted air-conduction threshold after the surgery, including each frequency of 0.5k, 1k, 2k, and 4k Hz. The discrepancies between the predictions and recordings did not differ among these four frequencies. Of the variance in mean postoperative air-conduction threshold, 56.7% was linearly accounted for by these two preoperative predictors in this sample. The results suggest a trend that, the higher the frequency, the larger the part was accounted for by these two preoperative predictors. These together may help a surgeon to estimate frequency-specific hearing outcome after the surgery, answer patients’ questions with quantitative statistics, and counsel patients with proper expectations.

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