Optotensometry – Developement of an optic method for measuring tubal function by tympanic membrane movement in a middle ear model

AbstractSince good ventilation of the middle ear is a pre-requisite for successful myringoplasty, it was our policy to investigate the tubal function in dry central perforation of the eardrum and to correlate the manometric and endoscopic findings. Nasal endoscopy proved to be indispensable in diagnosing mechanical tubal obstruction and in localizing and even treating ‘hidden’ lesions in key areas, with probable normalization of the tubal function. The correction of the mechanical tubal obstruction must precede ear surgery. Whenever tubal obstruction is diagnosed as functional or idiopathic, the ventilation of the middle ear should be guaranteed during ear surgery by addition of a tympanostomy tube to the graft or drum remnant, and a guarded prognosis given.

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Recovery from tympanic membrane perforation: Effects on membrane thickness, auditory thresholds, and middle ear transmission

Hearing Research ◽

10.1016/j.heares.2019.107813 ◽

2019 ◽

Vol 384 ◽

pp. 107813 ◽

Cited By ~ 4

Author(s):

Lingling Cai ◽

Glenna Stomackin ◽

Nicholas M. Perez ◽

Xiaohui Lin ◽

Timothy T. Jung ◽

...

Keyword(s):

Tympanic Membrane ◽

Middle Ear ◽

Tympanic Membrane Perforation ◽

Membrane Thickness ◽

Auditory Thresholds ◽

Membrane Perforation

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Causes of failure of combined approach tympanoplasty in the treatment of acquired cholesteatomas of the middle ear and the mastoid

The Journal of Laryngology & Otology ◽

10.1017/s0022215100131123 ◽

1995 ◽

Vol 109 (8) ◽

pp. 710-712 ◽

Cited By ~ 7

Author(s):

T. R. Kapur

Keyword(s):

Tympanic Membrane ◽

Eustachian Tube ◽

Middle Ear ◽

Squamous Epithelium ◽

Combined Approach ◽

Tube Obstruction ◽

Incomplete Removal ◽

Tube Dysfunction ◽

Cause Of Failure ◽

Causes Of Failure

AbstractForty cases of failed combined approach tympanoplasty were analysed. The commonest cause of failure was adhesions between the facial ridge and the tympanic membrane, causing segmental attico-mastoid malaeration in 51.3 per cent of cases followed-up continually. Other causes were, large dermoids, incomplete removal of squamous epithelium, and eustachian tube obstruction. Eustachian tube dysfunction did not appear to be a major cause of failure.

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Anatomical Effects of Sudden Middle Ear Pressure Changes

Annals of Otology Rhinology & Laryngology ◽

10.1177/000348947908800313 ◽

1979 ◽

Vol 88 (3) ◽

pp. 368-376 ◽

Cited By ~ 5

Author(s):

A. Axelsson ◽

J. Miller ◽

M. Silverman

Keyword(s):

Tympanic Membrane ◽

Middle Ear ◽

Round Window ◽

Applied Pressure ◽

Positive Pressure ◽

Air Bubbles ◽

Scala Tympani ◽

Middle Ear Pressure ◽

Contralateral Ear ◽

Pressure Changes

Acute middle ear (ME) and inner ear changes following brief unilateral phasic ME pressure changes (up to ± 6000/mm H2O) were studied in the guinea pig. Middle ear findings included perforation of the tympanic membrane, serous and serosanguinous exudate and hemorrhage of tympanic membrane and periosteal vessels. Changes were related to magnitude of applied pressure. Perforation and hemorrhage were more commonly seen with negative rather than positive pressure. Air bubbles behind the round window were seen with positive pressures. Occasional distortion, but never perforation of the round window, was noted. Hemorrhage of the scala tympani was observed with both positive and negative pressures; scala vestibuli hemorrhage was found with negative ME pressure. In some instances pressure direction and magnitude related changes were seen in the contralateral ear.

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Bioengineering. Effect of Depth of Conical-Shaped Tympanic Membrane on Middle-Ear Sound Transmission.

JSME International Journal Series C ◽

10.1299/jsmec.44.1097 ◽

2001 ◽

Vol 44 (4) ◽

pp. 1097-1102 ◽

Cited By ~ 15

Author(s):

Takuji KOIKE ◽

Hiroshi WADA ◽

Toshimitsu KOBAYASHI

Keyword(s):

Tympanic Membrane ◽

Middle Ear ◽

Sound Transmission

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Middle Ear Packing: Comparison Between Merogel and Gelfoam

Otolaryngology ◽

10.1016/j.otohns.2008.05.526 ◽

2008 ◽

Vol 139 (2_suppl) ◽

pp. P102-P102

Author(s):

Michael Julian Lipan ◽

Alava Ibraham ◽

Simon I Angeli ◽

Thomas R Van De Water

Keyword(s):

Tympanic Membrane ◽

Middle Ear ◽

Inflammatory Reaction ◽

Tympanic Membrane Perforation ◽

Mucosal Inflammation ◽

Controlled Study ◽

Control Group ◽

Otologic Surgery ◽

Membrane Perforation ◽

Brainstem Response

Problem Gelfoam has been used for decades in otologic surgery to support grafts and prostheses despite causing fibrosis and adhesions. More biocompatible packing materials could avoid these complications. This study compares Gelfoam with an injectable esterified hyaluronic acid, Merogel, as middle ear packing material after mucosal trauma. Methods A randomized, blinded, controlled study was performed in 17 juvenile guinea pigs. Middle ear surgery with mucosal trauma was performed and middle ears were packed with Merogel or Gelfoam; unpacked contralateral ears were used as controls. Auditory brainstem response (ABR) thresholds were measured in 4 frequencies pre-operatively, and repeated at 1, 2, and 6 weeks postoperatively. Gross analysis measured inflammatory reaction in each group. Statistical analysis was performed using ANOVA followed by post-hoc analysis for ABR thresholds and packing remaining at 6 weeks. Non-prametric tests were used for presence of mucosal inflammation, effusion and tympanic membrane perforation. Results ABR threshold changes from baseline were minor and comparable between the Merogel group and the control group. Threshold change was higher in the Gelfoam group. This difference was seen in each frequency tested at each time interval (all p<0.05). Gross analysis showed 1) Mucosal inflammation higher in the Gelfoam group (p<0.05), 2) Effusions were higher in the Gelfoam group but the difference was not significant (p=0.07), 3) Tympanic membrane perforation was equally rare between groups (p>0.05), 4) Unabsorbed packing was higher in the Gelfoam group (p<0.05); little Merogel was detectable at time of sacrifice. Conclusion Middle ear healing after surgery occurred similarly in the control group and the Merogel group. In contrast, the Gelfoam group demonstrated greater perturbation of hearing and a greater inflammatory reaction. Significance These results support Merogel as an alternative to Gelfoam in middle ear packing after otologic surgery. Support Research grant from Medtronic ENT.

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Simulation of Pathological High Impedance Tympanograms

Journal of Speech Language and Hearing Research ◽

10.1044/jshr.2904.514 ◽

1986 ◽

Vol 29 (4) ◽

pp. 505-514 ◽

Cited By ~ 7

Author(s):

Karel J. Van Camp ◽

Janet E. Shanks ◽

Robert H. Margolis

Keyword(s):

Tympanic Membrane ◽

Otitis Media ◽

Middle Ear ◽

High Frequency ◽

Secretory Otitis Media ◽

High Impedance ◽

The Relationship

The Vanhuyse, Creten, and Van Camp (1975) model for analyzing high frequency tympanograms predicts the shapes of conductance, susceptance, and admittance tympanograms from the relationship between resistance and reactance tympanograms at the tympanic membrane. This model has been applied primarily to low impedance middle-ear pathologies but has not been applied extensively to the more commonly occurring high impedance pathologies. The purpose of this study was to extend the Vanhuyse et al. (1975) model to high impedance pathologies and to identify tympanometric parameters associated with otosclerosis, secretory otitis media, and lateral ossicular fixation. Data from previous experiments on the shape and absolute values of resistance and reactance tympanograms were used to calculate 678-Hz admittance tympanograms that were unique to each of the three high impedance pathologies. Guidelines for differentiating among the middle-ear pathologies on the basis of high frequency tympanometric shapes are presented.

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Fat Myringoplasty and its Impact on the Hearing Mechanism of Middle Ear

Otorhinolaryngology Clinics - An International Journal ◽

10.5005/jp-journals-10003-1210 ◽

2015 ◽

Vol 7 (3) ◽

pp. 138-140

Author(s):

Bandar Al-qahtani ◽

Mohammed Al Tuwaijri ◽

Mohammed Al Mokhatrish

Keyword(s):

Tympanic Membrane ◽

Middle Ear ◽

Fat Grafting ◽

Type I ◽

Tympanic Membrane Perforations ◽

Large Perforation

ABSTRACT Objectives To address the fat grafting to tympanic membrane perforations—fat myringoplasty type I—and its impact over the hearing mechanism of the middle ear for both small (< 25% of the tympanic membrane) and large perforation (> 75 % of the TM). How to cite this article Al-qahtani B, Al Tuwaijri M, Al Mokhatrish M. Fat Myringoplasty and its Impact on the Hearing Mechanism of Middle Ear. Int J Otorhinolaryngol Clin 2015;7(3):138-140.

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Late Presentation of Idiopathic Tympanic Membrane Ossification with External Auditory Canal Stenosis

Otorhinolaryngology Clinics - An International Journal ◽

10.5005/jp-journals-10003-1211 ◽

2015 ◽

Vol 7 (3) ◽

pp. 141-143

Author(s):

Hitesh Verma

Keyword(s):

Tympanic Membrane ◽

Middle Ear ◽

External Auditory Canal ◽

Special Form ◽

Rare Case ◽

Late Presentation ◽

Canal Stenosis ◽

Middle Ear Cleft

ABSTRACT The external auditory canal (EAC) is formed by lateral cartilaginous and medial bony part. The stenosis of EAC is narrowing of the width of the EAC, i.e. either caused by congenital or acquired causes. Myringosclerosis is a condition caused by calcification of tissues in the tympanic membrane and ossification is a special form of fibrosis due to the long-term, irreversible continued inflammation in the middle ear cleft. We are presenting rare case of idiopathic tympanic membrane ossification with generalized stenosis of EAC in 29-year-old patient. How to cite this article Verma H, Dass A, Singhal SK, Gupta N. Late Presentation of Idiopathic Tympanic Membrane Ossification with External Auditory Canal Stenosis. Int J Otorhinolaryngol Clin 2015;7(3):141-143.

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