scholarly journals Analysis of Pharmacokinetics in the Cochlea of the Inner Ear

2021 ◽  
Vol 12 ◽  
Author(s):  
Seishiro Sawamura ◽  
Genki Ogata ◽  
Kai Asai ◽  
Olga Razvina ◽  
Takeru Ota ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
Inner Ear ◽  
Analytical Techniques ◽  
Acoustic Trauma ◽  
Therapeutic Agents ◽  
Therapeutic Strategies ◽  
Clinical Impact ◽  
Sensorineural Hearing ◽  
Global Population

Hearing loss affects >5% of the global population and therefore, has a great social and clinical impact. Sensorineural hearing loss, which can be caused by different factors, such as acoustic trauma, aging, and administration of certain classes of drugs, stems primarily from a dysfunction of the cochlea in the inner ear. Few therapeutic strategies against sensorineural hearing loss are available. To develop effective treatments for this disease, it is crucial to precisely determine the behavior of ototoxic and therapeutic agents in the microenvironment of the cochlea in live animals. Since the 1980s, a number of studies have addressed this issue by different methodologies. However, there is much less information on pharmacokinetics in the cochlea than that in other organs; the delay in ontological pharmacology is likely due to technical difficulties with accessing the cochlea, a tiny organ that is encased with a bony wall and has a fine and complicated internal structure. In this review, we not only summarize the observations and insights obtained in classic and recent studies on pharmacokinetics in the cochlea but also describe relevant analytical techniques, with their strengths, limitations, and prospects.

scholarly journals Spinal anesthesia causing hearing loss: are we aware?

2014 ◽  
Vol 13 (3) ◽  
pp. 251-254
Author(s):  
Hasme Zam Hashim ◽  
Irfan Mohamad ◽  
Rosdan Salim ◽  
Saedah Ali
Keyword(s):  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
Inner Ear ◽  
Spinal Anesthesia ◽  
Medical Science ◽  
Acoustic Trauma ◽  
Sensorineural Hearing ◽  
Noisy Environment ◽  
Genetic Syndromes ◽  
Ear Infection

Sensorineural hearing loss can be attributed to many factors. Acoustic trauma, noisy environment, genetic syndromes, inner ear infection and tumors are the known well-established causes. Some of them are treatable but many of those are nonreversible. Recent literatures have shown some data that suggest this type of hearing loss also occurring post anesthesia, particularly in spinal anesthesia cases. Others claim that this hearing loss is temporary and clinically not significant. DOI: http://dx.doi.org/10.3329/bjms.v13i3.19136 Bangladesh Journal of Medical Science Vol.13(3) 2014 p.251-254

Drug Delivery to the Inner Ear: Strategies and Their Therapeutic Implications for Sensorineural Hearing Loss

2012 ◽  
Vol 9 (3) ◽  
pp. 231-242 ◽  
Author(s):  
Teresa Rivera ◽  
Lorena Sanz ◽  
Guadalupe Camarero ◽  
Isabel Varela-Nieto
Keyword(s):  
Drug Delivery ◽  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
Inner Ear ◽  
Sensorineural Hearing ◽  
Therapeutic Implications

Azathioprine in Combination with Steroids in the Treatment of Autoimmune Inner-Ear Disease

1993 ◽  
Vol 21 (4) ◽  
pp. 192-196 ◽  
Author(s):  
Aytac Saraçaydin ◽  
Sedat Katircioğlu ◽  
Sami Katircioğlu ◽  
M Can Karatay
Keyword(s):  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
Inner Ear ◽  
Sensorineural Deafness ◽  
Sensorineural Hearing ◽  
Once Daily ◽  
Uncommon Disease ◽  
Inner Ear Disease ◽  
Pure Tones ◽  
Autoimmune Inner Ear Disease

A total of twelve patients with a relatively uncommon form of progressive sensorineural deafness (autoimmune innerear disease) were treated orally with 1 mg/kg azathioprine, once daily, and with 30 mg prednisolone, every other day, for 4 weeks. Statistically significant increases in the ability to hear pure tones or in discrimination on audiometry took place in 10/12 patients. This condition was initially described as ‘sensorineural hearing loss', but it is now clear that the term ‘autoimmune inner-ear disease’ is more appropriate since the vestibular compartment as well as the cochlear compartment is involved. This relatively uncommon disease is one of the few forms of sensorineural deafness that can be successfully treated.

scholarly journals Advances and challenges in adeno-associated viral inner-ear gene therapy for sensorineural hearing loss

2021 ◽  
Vol 21 ◽  
pp. 209-236
Author(s):  
Kamakshi Bankoti ◽  
Charles Generotti ◽  
Tiffany Hwa ◽  
Lili Wang ◽  
Bert W. O’Malley ◽  
...  
Keyword(s):  
Gene Therapy ◽  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
Inner Ear ◽  
Sensorineural Hearing

Causes and Types of Sensorineural Hearing Loss. Clinical Manifestations and Basic Principles of Treatment

2020 ◽  
pp. 9-16
Author(s):  
Sergey Armakov
Keyword(s):  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
Inner Ear ◽  
Clinical Manifestations ◽  
Sensorineural Hearing ◽  
Doppler Imaging ◽  
Comprehensive Treatment ◽  
Impaired Hearing ◽  
Temporal Bones ◽  
The Brain

Sensorineural hearing loss is a disorder associated with the damage to the inner ear structures: the cochlea (cortical organ), dysfunctioning of the vestibule-cochlear nerve or the central part of the auditory analyser (brain stem and cortical representation of the cortical temporal lobe). In recent years, there has been a steady increase in ensorineural hearing loss patients; they account for ca. 70% among the total patients with impaired hearing. The disease has numerous causes and a complex pathogenesis. Among the main factors contributing to hearing loss are genetic predisposition, perinatal pathology, including hypoxia at childbirth, exposure to infectious and toxic agents and metabolic disorders, injuries (mechanical, acoustic and altitude trauma). Vascular-rheological disorders in the vertebro-basilar system play an important part because blood is supplied to the inner ear from the anterior inferior cerebellar artery. There are sudden, acute and chronic sensorineural hearing loss. The ensorineural hearing loss isdiagnosed by examinations that allow to verify the diagnosis and to determine the sound analyser damage level. This complex includes audiometric examinations, including the tuning fork examination, speech audiometry, and acoustic impedancemetry. If necessary, ultrasound Doppler imaging of the main blood vessels of the brain, computed tomography of the temporal bones, and MRI of the brain are prescribed. The pattern of comprehensive treatment should include, first of all, the elimination of the disease cause and anti-hypoxic drugs, anti-oxidants and a number of physiotherapy procedures.

Audiological outcomes in sudden sensorineural hearing loss with presumed inner ear hemorrhage

2019 ◽  
Vol 40 (2) ◽  
pp. 274-278
Author(s):  
Kaitian Chen ◽  
Lanying Wen ◽  
Ling Zong ◽  
Min Liu ◽  
Jincangjian Sun ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
Inner Ear ◽  
Sudden Sensorineural Hearing Loss ◽  
Sensorineural Hearing
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