Sudden deafness and round window rupture

Goodhill, Victor

doi:10.1288/00005537-197109000-00010

Cited by 300 publications

(88 citation statements)

References 9 publications

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“…In the first one, there is increase in cerebrospinal fluid pressure, which is directly conducted to the perilymph, via cochlear aqueduct or inner auditory canal. In the second case, there is considerable increase or intratympanic and auditory tube pressure 38 . The implosive force could create a rupture of the cochlear membrane and perilymphatic fistula in patients submitted to general anesthesia with the gas 39,40 .…”

Section: Immittanciometrymentioning

confidence: 94%

Avaliação de alterações timpanométricas em pacientes submetidos à anestesia geral com óxido nitroso

Teixeira¹,

Tomita

Lima

2005

Rev. Bras. Otorrinolaringol.

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Ni trous oxide is an inhaling gas that can increase intratympanic pressure during the anesthetic act and cause negative pressure after it is discontinued, mainly in patients with Eustachian tube dysfunction. These pressure variations may come up with clinical implications such as tympanic membrane rupture, ossicular system disarticulation, haemotympanum, barotraumas, prosthesis displacement stapaedotomy and tympanic graft lateralization after tympanoplasty, in addition to serous fluid entrance into the middle ear during the negative pressure phase. Aim: To evaluate the nitrous oxide influence on the middle ear pressure in a population without tube malfunction performing pre and postoperative tympanometry. Study design: Transversal cohort. Material and Method: A prospective study was carried out with Universitário Clementino Fraga Filho Hospital-UFRJ inpatients submitted to general anesthesia with the use of 50% nitrous oxide from April to June 2003. It was also evaluated whether the duration of surgery, associated anesthetics, presence of allergic rhinitis and nasal septal deviation could contribute to the onset of intratympanic pressure alteration. Results: The sample was made up of 50 patients and in almost half of them (48%), postoperative tympanometry alterations (type C curve) were found when comparing to preoperative tympanometric control (type A curve). Neither gender nor age interfered in the onset of postoperative tympanometry alterations, similarly to surgery duration. The associated volatile anesthetic type, nasal septal deviation and allergic rhinitis were not able to influence postoperative middle ear pressure. Conclusion: Nitrous oxide modifies intratympanic pressure during the anesthetic act and after its discontinuation.Palavras-chave: óxido nitroso, pressão intratimpânica, alterações timpanométricas.

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Section: Immittanciometrymentioning

confidence: 94%

Avaliação de alterações timpanométricas em pacientes submetidos à anestesia geral com óxido nitroso

Teixeira¹,

Tomita

Lima

2005

Rev. Bras. Otorrinolaringol.

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“…Goodhill stated in 1971 that an increase in intracranial pressure from coughing, sneezing or straining may cause sudden, spontaneous rupture of the round 8 This same author also believed that a sudden change in middle-ear pressure may have the same effect during flight. Jones termed this 'pressure vertigo', and Lundgren 'alternobaric vertigo'.…”

Section: Inner-ear Barotraumamentioning

confidence: 99%

ENT morbidity at high altitude

Prasad

2010

J. Laryngol. Otol.

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Background: People suffer unique health problems in high altitude areas, due to such factors as elevation, aircraft ascent and descent, extreme cold, hypoxia, hypobaria, and low relative humidity. This study was conducted to evaluate ENT morbidity at high altitude.Methods: Serving soldiers introduced to a high altitude environment who presented with various ENT symptoms were examined to identify ENT disease. In addition, patients undergoing hyperbaric chamber therapy, tracheostomy and treatment of cold injuries were also examined for ENT problems.Results: The following were detected: 13 cases of otic barotrauma, 11 cases of sinus barotrauma, three cases of vertigo, six cases of pinna frostbite, three cases of barotrauma caused by hyperbaric chamber therapy, an unusually high incidence of epistaxis, and innumerable patients with high altitude pharyngitis.Conclusion: Diseases of the ear, nose and throat contribute significantly to high altitude morbidity. In a military context, health education of troops is necessary to avoid such problems.

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“…These observations signify the physiological importance of the RW membrane for audition, and the necessity to retain it, which has been revealed during surgery of the middle and inner ear [5]. Traumatic damage or rupture of the RW membrane can cause hearing loss and deafness owing to perilymph aspiration or loss of the normal pressure-releasing function of a compliant RW [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

A novel mechanism of cochlear excitation during simultaneous stimulation and pressure relief through the round window

Weddell

Yarin

Drexl³

et al. 2014

J. R. Soc. Interface.

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The round window (RW) membrane provides pressure relief when the cochlea is excited by sound. Here, we report measurements of cochlear function from guinea pigs when the cochlea was stimulated at acoustic frequencies by movements of a miniature magnet which partially occluded the RW. Maximum cochlear sensitivity, corresponding to subnanometre magnet displacements at neural thresholds, was observed for frequencies around 20 kHz, which is similar to that for acoustic stimulation. Neural response latencies to acoustic and RW stimulation were similar and taken to indicate that both means of stimulation resulted in the generation of conventional travelling waves along the cochlear partition. It was concluded that the relatively high impedance of the ossicles, as seen from the cochlea, enabled the region of the RW not occluded by the magnet, to act as a pressure shunt during RW stimulation. We propose that travelling waves, similar to those owing to acoustic farfield pressure changes, are driven by a jet-like, near-field component of a complex pressure field, which is generated by the magnetically vibrated RW. Outcomes of research described here are theoretical and practical design principles for the development of new types of hearing aids, which use near-field, RW excitation of the cochlea.

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Sudden deafness and round window rupture

Cited by 300 publications

References 9 publications

Avaliação de alterações timpanométricas em pacientes submetidos à anestesia geral com óxido nitroso

Avaliação de alterações timpanométricas em pacientes submetidos à anestesia geral com óxido nitroso

ENT morbidity at high altitude

A novel mechanism of cochlear excitation during simultaneous stimulation and pressure relief through the round window

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