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https://www.readbyqxmd.com/read/28549377/biocompatibility-of-liposome-nanocarriers-in-the-rat-inner-ear-after-intratympanic-administration
#1
Jing Zou, Hao Feng, Rohit Sood, Paavo K J Kinnunen, Ilmari Pyykko
Liposome nanocarriers (LPNs) are potentially the future of inner ear therapy due to their high drug loading capacity and efficient uptake in the inner ear after a minimally invasive intratympanic administration. However, information on the biocompatibility of LPNs in the inner ear is lacking. The aim of the present study is to document the biocompatibility of LPNs in the inner ear after intratympanic delivery. LPNs with or without gadolinium-tetra-azacyclo-dodecane-tetra-acetic acid (Gd-DOTA) were delivered to the rats through transtympanic injection...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28538472/efficacy-of-intratympanic-gentamicin-in-m%C3%A3-ni%C3%A3-re-s-disease-with-and-without-migraine
#2
Yuan F Liu, Elizabeth Renk, Steven D Rauch, Helen X Xu
OBJECTIVE: To compare the efficacy of intratympanic gentamicin injection (ITG) on vertigo control, drop attacks, and functional level in Ménière's disease patients with and without a history of migraine. PATIENTS: Ménière's disease patients (patients with migraine and age- and sex-matched control patients without migraine) treated from 2002 to 2012 who failed medical management and received ITG, with a minimum 2-year follow up. INTERVENTION: ITG...
May 22, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28511890/intratympanic-steroid-delivery-by-an-indwelling-catheter-in-refractory-severe-sudden-sensorineural-hearing-loss
#3
Diego Zanetti, Federica Di Berardino, Nader Nassif, Luca Oscar Redaelli De Zinis
OBJECTIVE: Many studies over the last decade showed favorable outcomes with intratympanic (IT) steroid treatment, alone as salvage treatment or in combination with conventional systemic therapy (ST). However, in severe to profound sensorineural hearing loss resistant to ST, the optimal infusion mode, the type and concentration of the solution, the preferable drug, its total amount, and the duration and fractionation of the treatment are still debated. Aim of the study was to investigate the feasibility and the outcomes of a direct and constant IT delivery of dexamethasone (DEX) by means of a new indwelling catheter...
May 13, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28499297/-diagnostics-and-therapy-of-idiopathic-sudden-sensorineural-hearing-loss
#4
Stefan K Plontke
This article reviews recent aspects of diagnostics, differential diagnostics and evidence in systemic and local therapy of idiopathic, sudden, sensorineural hearing loss (ISSHL). Since a number of disorders can be accompanied by sudden hearing loss a meaningful and targeted diagnostic strategy is of utmost importance. An important differential diagnosis of sudden hearing loss are intralabyrinthine schwannomas (ILS). The incidence of ILS is probably significantly underestimated. This may be due to the lack of awareness or lack of explicit search for an intralabyrinthine tumor on MRI or an inappropriate MRI technique ('head-MRI' instead of 'temporal bone-MRI' with too high slice thickness) for the evaluation of sudden hearing loss...
April 2017: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/28483257/protective-role-of-intratympanic-nigella-sativa-oil-against-gentamicin-induced-hearing-loss
#5
Deniz Tuna Edizer, Ozgur Yigit, Zehra Cinar, Mehmet Gul, Eyyup Kara, Birgul Yigitcan, Duygu Hayır, Ahmet Atas
OBJECTIVE: Aminoglycosides, used to combat with life-threatening infections, have a substantial risk of hearing loss. Nigella sativa is an annual herbaceous plant and used for treatment of many diseases for ages. We aimed to investigate the protective role of intratympanic nigella sativa oil against gentamicin induced hearing loss in an animal model. METHODS AND MATERIALS: Twenty eight guinea pigs were randomly divided into four groups: i-control, ii- Intratympanic nigella sativa oil (IT-NSO), iii- Intraperitoneal gentamicin (IP-G) and iv- Intraperitoneal gentamicin and intratympanic nigella sativa oil (IP-G + IT-NSO)...
June 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28462501/innovative-pharmaceutical-approaches-for-the-management-of-inner-ear-disorders
#6
REVIEW
Umberto M Musazzi, Silvia Franzé, Francesco Cilurzo
The sense of hearing is essential for permitting human beings to interact with the environment, and its dysfunctions can strongly impact on the quality of life. In this context, the cochlea plays a fundamental role in the transformation of the airborne sound waves into electrical signals, which can be processed by the brain. However, several diseases and external stimuli (e.g., noise, drugs) can damage the sensorineural structures of cochlea, inducing progressive hearing dysfunctions until deafness. In clinical practice, the current pharmacological approaches to treat cochlear diseases are based on the almost exclusive use of systemic steroids...
May 1, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28437363/intratympanic-dexamethasone-in-the-treatment-of-m%C3%A3-ni%C3%A3-re-s-disease-a-comparison-of-two-techniques
#7
Jason A Beyea, Ryan S Instrum, Sumit K Agrawal, Lorne S Parnes
OBJECTIVE: To assess the efficacy and safety of two different intratympanic dexamethasone (IT Dex) injection protocols for intractable unilateral Ménière's disease. STUDY DESIGN: Prospective case series. SETTING: Tertiary neurotology clinic. PATIENTS: One hundred six consecutive adult patients with definite unilateral Ménière's disease who had failed medical management were studied for an average of 1,061 days. None had previous oral steroid, IT steroid, or ablative treatment...
April 21, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28434389/evaluation-of-the-protective-effect-of-botulinum-toxin-type-a-injection-on-otitis-media-with-effusion
#8
Ömer Faruk Çalım, Yavuz Selim Yıldırım, Remzi Doğan, Selhattin Tuğrul, Özge Gedik, Orhan Özturan
OBJECTIVE: This study makes an analysis of the effect of Botulinum toxin type A on otitis media with effusion in rats. METHOD: As part of the study, 24 male Wistar Albino rats were divided into three groups: Group 1: Botulinum toxin Type A and Histamıne (intratympanic 0.2 ml = 20 unit BTA); Group 2: Saline and Histamine (intratympanic 0.2 ml 0.9%); Group 3: Histamine (intratympanic 0.2 ml). Histamine (intratympanic 0.2 ml) was administered into the right ear for all groups...
April 22, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28424655/sustained-and-transient-vestibular-systems-a-physiological-basis-for-interpreting-vestibular-function
#9
REVIEW
Ian S Curthoys, Hamish G MacDougall, Pierre-Paul Vidal, Catherine de Waele
Otolithic afferents with regular resting discharge respond to gravity or low-frequency linear accelerations, and we term these the static or sustained otolithic system. However, in the otolithic sense organs, there is anatomical differentiation across the maculae and corresponding physiological differentiation. A specialized band of receptors called the striola consists of mainly type I receptors whose hair bundles are weakly tethered to the overlying otolithic membrane. The afferent neurons, which form calyx synapses on type I striolar receptors, have irregular resting discharge and have low thresholds to high frequency (e...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28417102/prognostic-factors-for-recovery-from-sudden-sensorineural-hearing-loss-a-retrospective-study
#10
Woo Seok Kang, Chan Joo Yang, Myungjoo Shim, Chan Il Song, Tae Su Kim, Hyun Woo Lim, Joong Ho Ahn, Hong Ju Park, Jong Woo Chung
BACKGROUND AND OBJECTIVES: This study aimed to investigate prognostic factors in patients with idiopathic sudden sensorineural hearing loss (ISSNHL). SUBJECTS AND METHODS: From January 2007 to December 2011, a retrospective chart review identified 494 consecutive patients with ISSNHL. Demographic, audiometric, and clinical data were analyzed using a logistic regression test. RESULTS: Hearing recovery from ISSNHL was significantly associated with factors such as age, duration from onset of symptoms to commencement of treatment, severity of the initial pure tone threshold, and the treatment method...
April 2017: Journal of Audiology & Otology
https://www.readbyqxmd.com/read/28413076/detection-of-endolymphatic-hydrops-using-traditional-mr-imaging-sequences
#11
John H Keller, Barry E Hirsch, Ryan S Marovich, Barton F Branstetter
PURPOSE: The purpose of this study was to determine whether Meniere's disease (MD) produces endolymphatic cavity size changes that are detectable using unenhanced high-resolution T2-weighted MRI. MATERIALS & METHODS: This retrospective case-control study included patients with documented MD who had a high-resolution T2-weighted or steady-state free procession MRI of the temporal bones within one month of diagnosis, between 2002 and 2015. Patients were compared to age- and sex- matched controls...
April 6, 2017: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/28384627/simultaneous-versus-sequential-intratympanic-steroid-treatment-for-severe-to-profound-sudden-sensorineural-hearing-loss
#12
Myung Hoon Yoo, Won Sub Lim, Joo Hyun Park, Joong Keun Kwon, Tae-Hoon Lee, Yong-Hwi An, Young-Jin Kim, Jong Yang Kim, Hyun Woo Lim, Hong Ju Park
OBJECTIVES: Severe-to-profound sudden sensorineural hearing loss (SSNHL) has a poor prognosis. We aimed to compare the efficacy of simultaneous and sequential oral and intratympanic steroids for this condition. METHODS: Fifty patients with severe-to-profound SSNHL (>70 dB HL) were included from 7 centers. The simultaneous group (27 patients) received oral and intratympanic steroid injections for 2 weeks. The sequential group (23 patients) was treated with oral steroids for 2 weeks and intratympanic steroids for the subsequent 2 weeks...
2016: Audiology & Neuro-otology
https://www.readbyqxmd.com/read/28376942/voice-in-t1b-glottic-tumours-intratympanic-steroids-for-salvage-in-sensorineural-hearing-loss-intranasal-steroids-for-obstructive-sleep-apnoea-and-a-new-procedure-for-post-radiation-nasal-stenosis
#13
Musheer Hussain, Edward Fisher, Robin Youngs, Jonathan Fishman
No abstract text is available yet for this article.
May 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28362376/a-comparative-study-of-drug-delivery-methods-targeted-to-the-mouse-inner-ear-bullostomy-versus-transtympanic-injection
#14
Silvia Murillo-Cuesta, Néstor Vallecillo, Rafael Cediel, Adelaida M Celaya, Luis Lassaletta, Isabel Varela-Nieto, Julio Contreras
We present two minimally invasive microsurgical techniques in rodents for specific drug delivery into the middle ear so that it may reach the inner ear. The first procedure consists of perforation of the tympanic bulla, termed bullostomy; the second one is a transtympanic injection. Both emulate human clinical intratympanic procedures. Chitosan-glycerophosphate (CGP) and Ringer´s Lactate buffer (RL) were used as biocompatible vehicles for local drug delivery. CGP is a nontoxic biodegradable polymer widely used in pharmaceutical applications...
March 8, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28359220/the-effect-of-initial-treatment-on-hearing-prognosis-in-idiopathic-sudden-sensorineural-hearing-loss-a-nationwide-survey-in-japan
#15
Masahiro Okada, Naohito Hato, Shin-Ya Nishio, Ryosuke Kitoh, Kaoru Ogawa, Sho Kanzaki, Michihiko Sone, Satoshi Fukuda, Akira Hara, Tetsuo Ikezono, Kotaro Ishikawa, Satoshi Iwasaki, Kimitaka Kaga, Seiji Kakehata, Atsushi Matsubara, Tatsuo Matsunaga, Takaaki Murata, Yasushi Naito, Takashi Nakagawa, Kazunori Nishizaki, Yoshihiro Noguchi, Hajime Sano, Hiroaki Sato, Mikio Suzuki, Hideo Shojaku, Haruo Takahashi, Hidehiko Takeda, Tetsuya Tono, Hiroshi Yamashita, Tatsuya Yamasoba, Shin-Ichi Usami
OBJECTIVE: To investigate the hearing prognosis of idiopathic sudden sensorineural hearing loss (SSNHL) treated with different initial therapies. METHODS: Subjects consisted of patients diagnosed with idiopathic SSNHL within 7 days from onset and showing severe hearing loss (≥60 dB), who were registered in a Japanese multicenter database between April 2014 and March 2016. Subjects were divided into four groups according to initial therapy: (1) steroids, (2) steroids + Prostaglandins (PGs), (3) intratympanic steroids (ITS), and (4) no steroids...
March 31, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28349227/effects-of-bilateral-vestibular-deafferentation-in-rat-on-hippocampal-theta-response-to-somatosensory-stimulation-acetylcholine-release-and-cholinergic-neurons-in-the-pedunculopontine-tegmental-nucleus
#16
Phillip Aitken, Yiwen Zheng, Paul F Smith
Vestibular dysfunction has been shown to cause spatial memory impairment. Neurophysiological studies indicate that bilateral vestibular loss (BVL), in particular, is associated with an impairment of the response of hippocampal place cells and theta rhythm. However, the specific neural pathways through which vestibular information reaches the hippocampus are yet to be fully elucidated. The aim of the present study was to further investigate the hypothesised 'theta-generating pathway' from the brainstem vestibular nucleus to the hippocampus...
March 27, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28306710/are-intratympanic-corticosteroids-effective-for-m%C3%A3-ni%C3%A3-re%C3%A2-s-disease
#17
Ángela Chuang-Chuang, María A Baeza
Ménière’s disease affects the inner ear and its main symptoms are vertigo, hearing loss and fluctuating aural symptoms. Nowadays, there are many therapeutic alternatives, being the use of intratympanic corticosteroids one that has become popular. To answer this question, we searched in Epistemonikos database, which is maintained by screening multiple databases. We identified four systematic reviews including 15 studies overall, of which seven were randomized trials. We extracted data and generated a summary of findings table using the GRADE approach...
March 13, 2017: Medwave
https://www.readbyqxmd.com/read/28304075/steroid-intracochlear-distribution-differs-by-administration-method-systemic-versus-intratympanic-injection
#18
Jong Joo Lee, Jeong Hun Jang, Oak-Sung Choo, Hye Jin Lim, Yun-Hoon Choung
OBJECTIVE: Steroids have been widely used to treat inner-ear diseases such as sudden sensorineural hearing loss, tinnitus, and Meniere's disease. They can be given via either systemic or intratympanic (IT) injection. The purpose of the present study was to explore differences in intracochlear steroid distribution by the administration method employed (systemic vs. IT injection). STUDY DESIGN: Animal study. METHODS: Twenty-three Sprague-Dawley rats were given fluorescein isothiocyanate-labeled dexamethasone (FITC-DEX) three times (on successive days) via intraperitoneal (IP) or IT injection...
March 17, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28292626/intratympanal-gentamicin-in-meniere-s-disease-effects-on-individual-semicircular-canals
#19
Béla Büki, Heinz Jünger
OBJECTIVE: In this retrospective study the aim of the authors was to examine the effect of gentamicin on the individual semicircular canals after low dose, single injection intratympanal gentamicin therapy in Meniere's disease. METHODS: Data of 32 patients treated between 2011 and 2015 were collected. The high frequency, high acceleration vestibuloocular reflex (VOR) gain was measured in the individual semicircular canals using video head impulse test immediately before the first intratympanal gentamicin instillation and approximately two months later...
March 11, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28290919/intratympanic-methylprednisolone-perfusion-as-a-salvage-treatment-for-profound-idiopathic-sudden-sensorineural-hearing-loss
#20
Y Dai, L Lu, J Hou, X Yang, H Li, Y Yang, W She
OBJECTIVE: This study aimed to examine the effectiveness of intratympanic methylprednisolone perfusion as salvage treatment for profound idiopathic sudden sensorineural hearing loss. METHODS: A retrospective clinical study of 97 patients with unilateral profound idiopathic sudden sensorineural hearing loss was performed. In all, 83 patients who received salvage intratympanic methylprednisolone perfusion plus conventional treatment (except for steroids) as the second-line therapy were assigned to the study group, while 14 patients who received conventional treatment alone were assigned to the comparison group...
May 2017: Journal of Laryngology and Otology
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