Sofia Waissbluth

Sofia Waissbluth
Pontificia Universidad Católica de Chile | UC · Departamento de Otorrinolaringología

MD, PhD

About

55
Publications
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1,177
Citations

Publications

Publications (55)
Article
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Introduction We are now able to detect abnormalities for any semicircular canal with the use of the video head impulse test (vHIT). Prior to the vHIT, the gold standard for unilateral canal paresis of the lateral canal was considered the caloric test. Clinical cases where the caloric test and vHIT are discordant are not uncommon. Methods Retrospec...
Article
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Vestibular assessment tests such as the video head impulse test (vHIT) for the horizontal semicircular canal, and caloric test (Cal), both evaluate horizontal canal function. One would assume that the outcomes for these tests should lead to concordant results, yet several studies have suggested that dissociation can occur in certain pathological co...
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Cisplatin is a known ototoxic chemotherapy drug, causing irreversible hearing loss. Evidence has shown that cisplatin causes inner ear damage as a result of adduct formation, a proinflammatory environment and the generation of reactive oxygen species within the inner ear. The main cochlear targets for cisplatin are commonly known to be the outer ha...
Article
Purpose The aim of this study was to evaluate the different audiometric patterns in sudden sensorineural hearing loss (SSNHL), assess recovery rates based on the initial pattern and also, analyse the impact on speech discrimination scores (SDS). Methods A retrospective, descriptive, study was completed for patients with SSNHL from January 2010 unt...
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Advances in vestibular testing have now allowed us to test each semicircular canal as well as the utricle and saccule, independently. This has led to the discovery of new patterns of vestibular dysfunction that were once impossible to evaluate. This report describes the case of a 20-year-old woman with a 2-month history of recurrent dizziness. She...
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Background: Preoperative SARS-CoV-2 vaccination could support safer elective surgery. Vaccine numbers are limited so this study aimed to inform their prioritization by modelling. Methods: The primary outcome was the number needed to vaccinate (NNV) to prevent one COVID-19-related death in 1 year. NNVs were based on postoperative SARS-CoV-2 rates an...
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Introduction: Ménière’s disease is characterized by recurrent episodes of vertigo, sensorineural hearing loss and aural fullness, which can be incapacitating and cause stress and anxiety. Aim: To assess the effect of transtympanic steroid injections on hearing and vertigo for patients suffering from intractable Ménière’s disease. Material and Met...
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Peri-operative SARS-CoV-2 infection increases postoperative mortality. The aim of this study was to determine the optimal duration of planned delay before surgery in patients who have had SARS-CoV-2 infection. This international, multicentre, prospective cohort study included patients undergoing elective or emergency surgery during October 2020. Su...
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Introducción: La enfermedad de Ménière se caracteriza por crisis recurrentes de vértigo, asociado a hipoacusia y tinnitus, que pueden ser incapacitantes, y provocar estrés y ansiedad. Objetivos: Evaluar el efecto de la dexametasona transtimpánica sobre la audición y vértigo en pacientes con enfermedad de Ménière de difícil manejo. Material y Méto...
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Dissemination Committee (alphabetical by country):
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Introduction: The implementation of preventive lockdowns worldwide due to the COVID-19 pandemic has radically altered our daily lives. We have observed an increase in vertigo consultations during this period, mainly benign paroxysmal positional vertigo. Objective: To determine the impact of preventive lockdown on the prevalence and characteristi...
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Objective: To determine the specificity and sensitivity of the skull vibration-induced nystagmus test (SVINT) for detecting vestibular hypofunction. Databases reviewed: The Cochrane Library, MEDLINE, PubMed, EMBASE, and SciELO. Methods: A systematic review was conducted in accordance with the Preferred Reporting Items for Systematic Reviews an...
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Introduction: Coronavirus disease 2019, or COVID-19, has become a global pandemic. Given that the highest viral load of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is found in the airway, otolaryngologists are at high risk of infection. As a result, multiple recommendations have emerged regarding protective measures for surgical t...
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Background: Osteogenesis imperfecta (OI) is a rare group of genetic disorders affecting connective tissue, with consequent bone fragility, frequent fractures and skeletal deformity. Depending on the type, patients can have blue sclera, dentinogenesis imperfecta, and hearing loss. Aim: To determine the frequency, type and audiometric characteristic...
Article
Differential diagnosis of destructive midline injuries is complex due to its nonspecific clinical presentation, and the broad variety of conditions that share the same signs and symptoms, such as infections, neoplasms and autoimmune diseases. One of the etiologies that should be considered is cocaine-induced destructive midline lesions (CIMDL), cha...
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Background Cisplatin (CDDP) chemotherapy can cause serious side effects including irreversible and progressive hearing loss. Studies have aimed to assess potential protective strategies; however, systemic treatments have presented variable results, and potential interactions with CDDP have limited clinical trials.MethodsA review of the literature w...
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We are currently facing a global pandemic of great impact, as a result of the rapid spread of a new coronavirus, SARS-CoV-2, which causes coronavirus disease (COVID-19). We have yet to understand the pathophysiology of this disease, as well as the variety of signs and symptoms it can cause. The scientific and medical communities are constantly publ...
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Head and neck surgeries have a high risk of bleeding, and therefore could require the use of blood transfusions. There are cases for which blood transfusions are not an acceptable option, as is the case for Jehovah's Witnesses. We present the case of a Jehovah's Witness with a sinonasal tumor with a high risk of bleeding, who presented with recurre...
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Introducción: El vértigo posicional paroxístico benigno (VPPB) es el vértigo periférico más frecuente. El tratamiento depende del compromiso de los canales semicirculares (CSC) y/o cúpulas, y consiste en maniobras de reposición de partículas. Objetivo: Evaluar los factores de riesgo asociados al VPPB en pacientes atendidos en el Servicio de Otorri...
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Congenital internal auditory canal stenosis associated with aplasia/hypoplasia of the cochleovestibular nerve is a very infrequent pathology. It is usually unilateral and may be accompanied by aplasia/hypoplasia of the facial nerve and other malformations of the inner ear. We hereby present two clinical cases of pediatric patients with congenital i...
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Introducción: La programación adecuada de los implantes cocleares permiten lograr niveles de estimulación auditivos óptimos. Se realiza de forma individualizada, siendo la detección del umbral de confort ideal un desafío. Se ha descrito la utilidad de los potenciales auditivos del tronco encefálico eléctrico (ePEATC) y el reflejo eléctrico estapedi...
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Tuberculous otomastoiditis is an extremely rare form of extrapulmonary disease that can be easily misdiagnosed. We hereby report the case of a previously healthy 35-yearold female with bilateral tuberculous otomastoiditis associated with vertigo, bilateral mixed hearing loss, and bilateral facial nerve palsy as the initial clinical presentation. Re...
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Introducción: El absceso periamigdalino es una causa importante de consulta de urgencia en los servicios de otorrinolaringología. Su manejo incluye tratamientos antibióticos y drenaje del absceso. Objetivo: Describir y analizar las características clínicas, epidemiológicas y manejo de los abscesos periamigdalinos en el Complejo Asistencial Dr. Sót...
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Introducción: El Draf III es una técnica quirúrgica que permite el abordaje endoscópico de los senos frontales. Fue descrita como un procedimiento de rescate para la rinosinusitis crónica (RSCr) frontal en que falla la cirugía estándar. Actualmente, su uso se ha extendido a otras aplicaciones. Objetivo: (1) Revisar las indicaciones del abordaje Dr...
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Introduction: Refractory acute otitis media (rAOM) is defined as the persistence of signs and symptoms of AOM for more than 48 to 72 hours after the initiation of antibiotic treatment. These patients are often referred to the pediatric emergency department (PED). We sought to study rAOM cases referred to our PED, and to evaluate their clinical char...
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Disorders of olfaction are common, however, anosmia and hyposmia are not frequently self-reported, and these symptoms can lead to a significant impairment in quality of life. Causes of anosmia can be acquired or congenital, and the prevalence of isolated congenital anosmia is estimated to be 1:10000 in the general population. In these cases, anosmi...
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Introduction: Rhinoseptoplasty is a complex and challenging surgery. It addresses nasal aesthetics and functionality. Aim: To describe the experience in rhinoseptoplasty performed by the Nose Committee at our medical center. Material and method: Descriptive study, of the all rhinoseptoplasties performed by the Nose Committee between 2013 and 2015....
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Objectives: Platinum-based chemotherapy is effective against a variety of pediatric malignancies. Unfortunately, the use of cisplatin and carboplatin can lead to permanent and progressive sensorineural hearing loss which can affect the quality of life of cancer survivors. The objectives of this study were to evaluate the incidence of platinum-indu...
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Introducción El papiloma invertido nasosinusal es un tumor benigno con tendencia a la recidiva, y con riesgo de malignización. El tratamiento habitual es la extirpación quirúrgica. Objetivo Describir y analizar las características clínicas, epidemiológicas, y resultados del tratamiento quirúrgico por vía endoscópica. Material y método Estudio ret...
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Objectives: Platinum-based chemotherapy treatments are effective against a variety of pediatric malignancies. However, its use can lead to permanent hearing loss. The aim of this study was to evaluate the long-term effect of platinum chemotherapy on hearing and evaluate its progression. Methods: Prospective cohort study. All records of pediatric...
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Introduction Temporal bone fractures (TBF) are traditionally classified by their angle of fracture relative to the petrous ridge, and more recently by whether or not they violate the otic-capsule. This study compared rates of hearing loss (HL) and signs of otologic dysfunction among fracture types of both classification systems, within the pediatri...
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The antineoplastic agent’s cisplatin and carboplatin are widely used as they are highly effective. Unfortunately, ototoxicity is a frequently encountered side effect of platinum-based chemotherapy. Clinically, patients generally develop a progressive, bilateral, and irreversible sensorineural hearing loss. With rising cancer survival rates, a great...
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Cisplatin is a commonly used chemotherapeutic agent and causes serious side effects, including progressive and irreversible hearing loss. No treatment is currently available for cisplatin-induced ototoxicity. We have previously demonstrated that erdosteine, a potent antioxidant, partially protected the cochlea against cisplatin toxicity in vivo. Th...
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Objectives: Temporal bone fractures are relatively common findings in patients with head trauma. The aim of this study was to evaluate the characteristics of temporal bone fractures in the pediatric population. Study design: Retrospective case series. Tertiary care pediatric academic medical center. Methods: The medical records of patients age...
Research
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To determine the safety of EarigateTM as an ear wax softening product.
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OBJECTIVES: Cisplatin, one of the most effective and widely used chemotherapeutic agents in the treatment of head and neck malignancies, has severe dose-limiting side effects including ototoxicity. This study evaluates the effectiveness of nanoencapsulated curcumin and dexamethasone in preventing degenerative changes in inner ear cells caused by ci...
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The pathologic changes that occur as a result of diabetic microangiopathy have been well described for the kidneys and the eyes. Although many studies suggest an association between diabetes mellitus and hearing loss, the pathologic changes in the cochlea in association with the diabetic state remain to be clarified. The aim of this review is to de...
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To determine the safety of Earigate™ as an ear wax softening product. Prospective, controlled animal study. Bilateral wide myringotomies were performed in eleven chinchillas. In each animal, Earigate™ was delivered to a randomly selected experimental ear canal as 2 puffs twice a day. Auditory brainstem response (ABR) was used to assess the hearing...
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Background: Patients receiving radiotherapy (RT) for head and neck tumors are at risk of developing sensorineural hearing loss. The objective of this study was to analyze the literature regarding sensorineural hearing loss after RT for head and neck cancer. Methods: Seven databases were searched to identify eligible studies. Eligible articles we...
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Objectives: High levels of unconjugated bilirubin have been associated with neuronal damage. The auditory brain nuclei and the inferior colliculi are often the first part of the brainstem to be involved, often leading to hearing abnormalities. A systematic review of clinical studies was conducted to evaluate the effect of hyperbilirubinemia on hea...
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Cisplatin is a potent antineoplastic agent widely used for a variety of cancer types. Unfortunately, its use leads to dose limiting side effects such as ototoxicity. Up to 93% of patients receiving cisplatin chemotherapy will develop progressive and irreversible sensorineural hearing loss which leads to a decreased quality of life in cancer survivo...
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Hypothesis: Decalcification of cochlear samples in Morse's solution after methacarn fixation provides greater RNA quantification and morphologic preservation of cochlear structures as compared with EDTA and formic acid decalcifying solutions after methacarn fixation. Background: A variety of fixatives and decalcifying agents can fragment or chem...
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Ototoxicity is a common side effect of cisplatin chemotherapy. This study was undertaken to determine the potential protective effects of a systemic administration of dexamethasone against cisplatin-induced ototoxicity. A prospective controlled trial conducted in an animal model. The setting was Animal care research facilities of the Montreal Child...
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Objective: To systematically review the literature to characterize radiation-induced sensorineural hearing loss for head and neck tumors. Method: Seven databases were searched to identify studies assessing the characteristics of sensorineural hearing loss caused exclusively by radiotherapy for head and neck cancer. Results: Fourteen articles were e...
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Objective: 1) Evaluate the commonly used ototoxicity criteria. 2) Develop a method for establishing comparisons among studies using different criteria. 3) Use this comparison method to evaluate the effect of treatment and assessment factors (ie, chemotherapy agent, cumulative dose, head and neck radiotherapy, and follow-up period) on the reported i...
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Ototoxicity is a frequent adverse event of cisplatin treatment. No therapy is currently available for cisplatin-induced ototoxicity. A systematic review of experimental animal studies and in vitro experiments was conducted to evaluate gene therapy as a potential future therapeutic option. Eligible studies were identified through searches of electro...
Article
Cisplatin is a commonly used chemotherapeutic agent. One of its major dose-limiting side effects is ototoxicity. No treatment has yet been approved for this condition. The objective of this study was to determine the potential protective effect of a systemic administration of erdosteine against cisplatin-induced ototoxicity. A prospective controlle...
Article
Objective: Conduct an updated systematic review on the outcome of Bell Palsy (BP) in children following steroid treatment. Method: Medline, Embase, Cochrane Library, and BIOSIS Previews databases were searched obtaining articles from years 2000 to 2010 without any language restriction. Articles describing children aged 0 to 18 years with BP treated...
Article
Objective: Cisplatin is a commonly used chemotherapeutic agent. One of its major dose limiting side effects is ototoxicity. No treatment has yet been approved for this condition. The objective of this study was to determine the potential protective effect of a systemic administration of erdosteine against cisplatin-induced ototoxicity. Method: Guin...

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