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https://www.readbyqxmd.com/read/29038666/study-of-methylene-blue-ototoxicity-in-the-guinea-pig
#1
Sarah Belhassen, Musaed Alzahrani, Marc-Elie Nader, Louis Gaboury, Issam Saliba
BACKGROUND: Methylene blue is widely used in the medical field, especially as a blue dye for staining. It is also used as a photosensitizing agent in antimicrobial photodynamic therapy, which once photoactivated is effective for the eradication of several multi-resistant bacteria. The objective of this study was to investigate the ototoxic potential of methylene blue and precise its use in otology. METHODS: It was a prospective animal study performed on guinea pigs in our tertiary medical center...
November 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/28992726/middle-ear-histopathology-following-magnetic-delivery-to-the-cochlea-of-prednisolone-loaded-iron-oxide-nanoparticles-in-rats
#2
Jean-Francois Lafond, Mika Shimoji, Bharath Ramaswamy, Mohammed I Shukoor, Pulkit Malik, Benjamin Shapiro, Didier A Depireux
Delivery of therapy to the cochlea is a challenge and limits the efficacy of therapies meant to treat hearing loss, reverse tinnitus, and protect hearing from chemotherapy regimens. Magnetic injection is a technique that uses magnetic fields to inject nanoparticles from the middle ear into the cochlea, where they can then elute therapy to treat hearing disorders. To evaluate the safety of this treatment in the middle ear, 30 rats were subdivided into 6 groups and treated by single or multiple intratympanic injections of saline, prednisolone, nanoparticles, or nanoparticles loaded with prednisolone...
January 1, 2017: Toxicologic Pathology
https://www.readbyqxmd.com/read/28888426/sudden-sensorineural-hearing-loss-in-children-and-adolescents-clinical-characteristics-and-age-related-prognosis
#3
Jin Youp Kim, Jae Joon Han, Woong Sang Sunwoo, Ja-Won Koo, Seung-Ha Oh, Min-Hyun Park, Young Ho Kim
OBJECTIVE: Although many studies have investigated sudden sensorineural hearing loss (SSNHL) in adults, there were few studies on SSNHL in the pediatric population; especially research on treatment and prognosis of pediatric SSNHL was limited. The aim of this study was to evaluate clinical characteristics, treatment outcomes and prognostic factors in children and adolescents with SSNHL. METHODS: A retrospective review of medical records of 67 pediatric patients (67 ears) who had diagnosed with SSNHL at our hospitals was performed to analyze patients' clinical manifestations and audiograms...
September 6, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28851247/a-novel-vehicle-for-local-protein-delivery-to-the-inner-ear-injectable-and-biodegradable-thermosensitive-hydrogel-loaded-with-plga-nanoparticles
#4
Juan Dai, Wei Long, Zhongping Liang, Lu Wen, Fan Yang, Gang Chen
Delivery of biomacromolecular drugs into the inner ear is challenging, mainly because of their inherent instability as well as physiological and anatomical barriers. Therefore, protein-friendly, hydrogel-based delivery systems following local administration are being developed for inner ear therapy. Herein, biodegradable poly(lactic-co-glycolic acid) (PLGA) nanoparticles (NPs) containing interferon α-2b (IFN α-2b) were loaded in chitosan/glycerophosphate (CS/GP)-based thermosensitive hydrogel for IFN delivery by intratympanic injection...
August 30, 2017: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/28816698/intralabyrinthine-vestibular-schwannoma-responsive-to-intratympanic-gentamicin-treatment
#5
Edoardo Covelli, Luigi Volpini, Chiara Filippi, Silvia Tarantini, Vania Marrone, Simonetta Monini, Maurizio Barbara
Intralabyrinthine schwannoma (ILS) is a rare benign tumor that affects the ends of cochlear and vestibular nerves. In a majority of the cases, it occurs with unilateral progressive sensorineural hearing loss. Less frequent symptoms include tinnitus, imbalance, vertigo, or fullness. The advent of magnetic resonance imaging allows early diagnosis and enables an appropriate therapeutic protocol. This report describes a case of intravestibular schwannoma, with fluctuating hearing loss and intractable vertigo, treated with intratympanic gentamicin...
August 2017: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/28816692/questionnaires-in-patients-with-unilateral-sudden-sensorineural-hearing-loss
#6
Gyu Ho Hwang, Jae Woo Joo, In Sik Song, Yoon Chan Rah, June Choi
OBJECTIVE: In this study, we evaluated the prognostic value of the Dizziness Handicap Inventory (DHI) and the Tinnitus Handicap Inventory (THI) in patients with unilateral sudden sensorineural hearing loss (SSNHL). MATERIALS AND METHODS: In total, 101 patients with unilateral SSNHL (44 women, 57 men), who were admitted and treated at our institution between December 2012 and June 2014, were included in the study. All patients completed the questionnaires for DHI and THI during their admission and were treated with bed rest and oral methylprednisolone (1 mg/kg, which was eventually tapered)...
August 2017: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/28802357/evaluation-of-ototoxicity-of-intratympanic-administration-of-methotrexate-in-rats
#7
Sabri Baki Eren, Remzi Dogan, Alper Yenigun, Bayram Veyseller, Selahattin Tugrul, Orhan Ozturan, Mehmet Serif Aydin
OBJECTIVE: Methotrexate is a dihydrofolate reductase enzyme inhibitor with very high selectivity, and it is an antiproliferative folic acid antagonist used for the treatment of autoimmune diseases. In this study, our objective was to evaluate the effect of intratympanic Methotrexate application in the inner ear. METHODS: This study was planned as an animal study. This study performed in a tertiary referral center. 24 healthy female rats were used in our study. They were separated into three groups...
September 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28774486/histopathology-of-tympanic-membranes-from-patients-with-ventilation-tubes
#8
Mehmet Faruk Oktay, Hasan Deniz Tansuker, Hisaki Fukushima, Michael M Paparella, Patricia A Schachern, Sebahattin Cureoglu
OBJECTIVE: To evaluate the histopathologic changes in tympanic membranes (TMs) with ventilation tubes (VTs). METHODS: In this retrospective human temporal bone study our overall study group included 4 subgroups of TMs from deceased donors as follows: 24 with a history of VT insertion for chronic otitis media with effusion (COME-VT); 5 with a history of VT insertion for Meniere's disease (MD-VT); 33 without a history of VT insertion for chronic otitis media with effusion (COME); and 14 without a history of VT insertion for Meniere's disease (MD)...
July 31, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28760618/control-of-vertigo-in-m%C3%A3-ni%C3%A3-re-s-disease-by-intratympanic-dexamethasone
#9
A Weckel, M Marx, M-J Esteve-Fraysse
OBJECTIVE: The main objective was to assess the efficacy of intratympanic dexamethasone injection in controlling vertigo in unilateral Ménière's disease refractory to medical treatment. MATERIALS AND METHODS: A retrospective study included 25 patients with disabling unilateral Ménière's disease, defined according to the American Academy of Otorhinolaryngology-Head and Neck Surgery (AAO-HNS) criteria. Patients received intratympanic dexamethasone during the monitoring period...
July 28, 2017: European Annals of Otorhinolaryngology, Head and Neck Diseases
https://www.readbyqxmd.com/read/28756569/sudden-hearing-loss-an-effectivity-comparison-of-intratympanic-and-systemic-steroid-treatments
#10
Gülce Ermutlu, Nilda Süslü, Taner Yılmaz, Sarp Saraç
Corticosteroid treatment has been considered the most effective treatment modality for sudden sensorineural hearing loss so far. Application route of corticosteroids may vary. We have designed a prospective randomized case-controlled clinical trial to evaluate the effectivenesses of the different application routes of steroids in the treatment of SSHL. Thirty-five patients were distributed randomly to two groups which were treated with either 'oral' or 'intratympanic' corticosteroids. Intratympanic steroid administration was performed three times every other day transtympanically...
July 29, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28719039/differences-in-clinical-characteristics-and-prognosis-of-sudden-low-and-high-frequency-hearing-loss
#11
RANDOMIZED CONTROLLED TRIAL
Oak-Sung Choo, Suk Min Yang, Hun Yi Park, Jong Bin Lee, Jeong Hun Jang, Seong Jun Choi, Yun-Hoon Choung
OBJECTIVES/HYPOTHESIS: We compared the clinical characteristics between acute low- and high-frequency hearing loss (LF and HF, respectively) patients, and the efficacy of three different treatment protocols (systemic steroids, intratympanic steroid injection, and combination therapy). STUDY DESIGN: Prospective, randomized controlled study. METHODS: A total of 111 patients diagnosed with LF or HF were treated on an outpatient basis. Each group was randomly divided into three equal subgroups based on therapy: oral steroid, intratympanic dexamethasone injection (IT), and combination therapy...
August 2017: Laryngoscope
https://www.readbyqxmd.com/read/28716762/selective-window-application-of-gentamicin-dexamethasone-in-meniere-s-disease
#12
Fazıl Necdet Ardıç, Funda Tümkaya, Kamil Aykal, Burçin Çabuk
OBJECTIVE: The purpose of the study is to prevent hearing loss when using intratympanic (IT) gentamicin for intractable Meniere's disease. MATERIALS AND METHODS: It is a retrospective case review study. Twenty five patients who had definite Meniere's disease and had either selective window application or weekly IT gentamicin were included into the study. First group (selective) had dexamethasone on the round window and gentamicin on oval window during exploratory tympanotomy procedure...
August 2017: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/28662721/rheopheresis-in-treatment-of-idiopathic-sensorineural-sudden-hearing-loss
#13
Milan Kostal, Jakub Drsata, Milan Bláha, Miriam Lánská, Viktor Chrobok
BACKROUND: Only few therapeutic options exist for patients with refractory sudden idiopathic sensorineural hearing loss (SISHL). Little is known about the efficacy of second-line therapies. Rheopheresis seems to be an effective therapeutic possibility. METHODS: Between 2012 and 2015, 106 patients with SISHL were enrolled in the study, of whom 52 were refractory to initial treatment. As salvage therapy, these patients were offered either 3 sessions of rheopheresis (33 pts) or intratympanic steroid treatment through MicroWick application (19 pts)...
June 29, 2017: Journal of Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/28645678/endolymphatic-hydrops-imaging-differential-diagnosis-in-patients-with-meniere-disease-symptoms
#14
A Attyé, M Eliezer, A Galloux, J Pietras, I Tropres, S Schmerber, G Dumas, A Krainik
PURPOSE: The goal of this retrospective study was to investigate the differential diagnosis of endolymphatic hydrops in patients with Meniere's disease (MD) symptoms by using magnetic resonance imaging (MRI) with intravenous injection of gadolinium chelate and delayed acquisition. MATERIAL AND METHOD: Two hundred patients (133 women, 67 men; mean age=67.2±11 ([SD] years) with unilateral MD underwent MRI at 3-T, between 4.5 and 5.5hours after intravenous administration of gadoterate meglumine at a dose of 0...
October 2017: Diagnostic and Interventional Imaging
https://www.readbyqxmd.com/read/28639557/effects-of-selective-seratonine-re-uptake-inhibitors-on-meniere-s-disease
#15
Olcay Kıroğlu, Özgür Sürmelioğlu, Mete Kıroğlu
OBJECTIVE: To evaluate the effects of selective serotonin re-uptake inhibitors (SSRIs) on Meniere's disease (MD) on patients who have both MD and generalized anxiety disorder. MATERIALS AND METHODS: All patients were evaluated with neurotologic examination, videonystagmography, audiological tests, and inner ear magnetic resonance imaging. Characteristic history and the evaluation of the patients' vertigo attacks during the attacks were the primary criteria for the diagnosis of MD...
August 2017: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/28636736/the-protective-effect-of-intratympanic-dexamethasone-on-streptomycin-ototoxicity-in-rats
#16
Aylin Gül, Engin Şengül, Beyhan Yılmaz, Fazıl Emre Özkurt, Mehmet Akdağ, Ayşenur Keleş, İsmail Topçu
The purpose of this experimental study was to investigate the protective role of intratympanically administered dexamethasone on the inner ears of rats that were exposed to streptomycin ototoxicity. Twenty-four adult Wistar albino rats were separated into 4 groups: Group 1 (only streptomycin), Group 2 (only intratympanic dexamethasone), Group 3 (streptomycin and intratympanic dexamethasone), and Group 4 (streptomycin and intratympanic saline). All rats were evaluated with distortion product otoacoustic emissions (DPOAE) tests before the start of treatment and on the day it ended...
June 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/28608739/safety-of-repeated-dose-intratympanic-injections-with-am-101-in-acute-inner-ear-tinnitus
#17
RANDOMIZED CONTROLLED TRIAL
Hinrich Staecker, Michael Morelock, Timothy Kramer, Pavel Chrbolka, Joong Ho Ahn, Thomas Meyer
Objective To evaluate the safety and tolerability of repeated intratympanic administration of the gel-formulated NMDA receptor antagonist AM-101 in acute patients with inner ear tinnitus. Study Design Prospective, double-blind, randomized, placebo-controlled study. Setting Sixty-nine secondary and tertiary sites in North America, Europe, and Asia. Subjects and Methods In total, 343 subjects with persistent acute tinnitus after traumatic cochlear injury or otitis media were randomized to receive 3 intratympanic doses of either AM-101 0...
September 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28607789/unilateral-enlarged-vestibular-aqueduct-syndrome-and-bilateral-endolymphatic-hydrops
#18
Massimo Ralli, Giuseppe Nola, Luca Sparvoli, Giovanni Ralli
Enlarged vestibular aqueduct (EVA) syndrome is a common congenital inner ear malformation characterized by a vestibular aqueduct with a diameter larger than 1.5 mm, mixed or sensorineural hearing loss that ranges from mild to profound, and vestibular disorders that may be present with a range from mild imbalance to episodic objective vertigo. In our study, we present the case of a patient with unilateral enlarged vestibular aqueduct and bilateral endolymphatic hydrops (EH). EH was confirmed through anamnestic history and audiological exams; EVA was diagnosed using high-resolution CT scans and MRI images...
2017: Case Reports in Otolaryngology
https://www.readbyqxmd.com/read/28589104/intratympanic-injection-of-dexamethasone-and-electrocochleographic-data-in-cases-of-definite-one-sided-refractory-meniere-s-disease
#19
Sasan Dabiri Satri, Reza Gharibi, Farzaneh Nejadian, Nasrin Yazdani, Reza Hoseinabadi, Nima Rezazadeh, Mohammad Reza Firouzifar, Saeed Babaei
INTRODUCTION: Meniere's disease (MD) is a disease of the inner ear that presents itself with repeated episodes of vertigo (96.2%), tinnitus (91.1%), and sensorineural hearing loss (87.7 %). In this article we sought to assess the effects of intratympanic (IT) injections of dexamethasone on definite cases of MD using electrocochleography (ECOG). MATERIALS AND METHODS: In this hospital-based case series in 36 patients, we measured audiometric values and ECOG in all patients before, 1 month and 6 months after 4-mg/mL IT injections of dexamethasone...
May 2017: Iranian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28549377/biocompatibility-of-liposome-nanocarriers-in-the-rat-inner-ear-after-intratympanic-administration
#20
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
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