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In Chile, between 450 and 500 cases of cancer are diagnosed annually in children and adolescents. Treatment is financed by the state, but there are non-financial elements that could condition adherence to treatment. OBJECTIVE: to explore family, socioeconomic, housing, and support network risk factors that could affect adherence to medical treatment in children and adolescents diagnosed with cancer. PATIENTS AND METHOD: Descriptive observational study in pediatric oncology hospitals of a national cancer program. Through a "Social Care Form" applied to 104 caregivers of children and adolescents, between August 2019 and March 2020, socioeconomic data of children diagnosed with cancer were recorded in four dimensions: i) Individual/family/health; ii) Work/education/socioeconomic; iii) Housing/environment; and iv) Participation/support networks. RESULTS: 99% of the children and adolescents were registered in the public health system; 69% belonged to the lowest income brackets. Care for children and adolescents was mainly provided by the mother (91%). 79% reported living in a house; 48% owned or were paying for their home. Housing quality was described as good (70%), with low levels of overcrowding. 56% of households had access to Wi-Fi internet connection, while 27% reported no access. The main support network reported was the family (84%). CONCLUSIONS: Family, socioeconomic, housing, and support network risk factors were observed in children and adolescents diagnosed with cancer; socioeconomic and gender aspects highlight the social inequalities in these families. Descriptive baseline results were obtained, so it is suggested to re-observe its evolution and thus measure its impact on adherence to treatment.

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La migraña vestibular es una de las etiologías más frecuentes del síndrome vestibular episódico a nivel mundial. Presenta varias hipótesis de patofisiología, principalmente a nivel de sistema vestibular central y genético. Su diagnóstico es fundamentalmente clínico, pero se han observado alteraciones a nivel de la función vestibular y de las pruebas oculomotoras. Los hallazgos clínicos no solo están presentes en el momento de la crisis, sino también se han observado en intervalos asintomáticos. La paresia unilateral en la prueba calórica suele ser más frecuente que una ganancia baja del reflejo vestíbulo-ocular del canal lateral en la videonistagmografía, sin embargo, existe una tasa elevada de discordancia entre ambas pruebas. Respecto a la prueba de estudio del movimiento ocular, se han observado alteraciones en el seguimiento pendular, movimiento sacádico, nistagmo optocinético, nistagmo evocado por la mirada, nistagmo espontáneo y nistagmo posicional. Es frecuente observar que el nistagmo provocado por cambios posicionales presenta características centrales durante la crisis de migraña vestibular, pero también se pueden presentar en periodos libres de síntomas en este grupo de pacientes.

Vestibular migraine is one of the most frequent etiologies of episodic vestibular syndrome worldwide. It presents several pathophysiology hypotheses, mainly at the central vestibular system and genetic level. Its diagnosis is fundamentally clinical, but changes in vestibular function and oculomotor tests have been observed. Clinical findings are present not only during the crisis, but also have been seen in the symptom-free interval. Unilateral paresis on caloric testing is usually more common than low gain of the vestibulo-ocular reflex in the lateral canal on videonystagmography, however, there is a high rate of discrepancy between these tests. Regarding the eye movement study test, alterations have been seen in pendulum tracking, saccadic movement, optokinetic nystagmus, gaze-evoked nystagmus, spontaneous nystagmus and positional nystagmus. It is common to observe that nystagmus caused by positional changes has central features during vestibular migraine attacks, but it can also be seen in the symptom-free interval in this group of patients.

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La hipoacusia afecta a más de 1.500 millones de personas mundialmente. Los principales medios de rehabilitación usados son los audífonos e implantes cocleares (IC). El IC eléctrico convierte el sonido en impulsos eléctricos que estimulan, directamente, a las neuronas del ganglio espiral para proveer sensación auditiva. Tiene como desventaja una amplia dispersión espacial de la corriente, limitando la resolución espectral y el rango dinámico de codificación sonoro, lo que conduce a una mala comprensión del habla en entornos ruidosos y mala apreciación de la música. En los últimos años se ha estudiado utilizar estimulación óptica en vez de eléctrica, pues emite estímulos con mayor selectividad espacial. Se han descrito IC ópticos usando luz infrarroja y otros con métodos de optogenética, estos últimos requieren de la expresión de proteínas fotosensibles inducidas por virus adenoasociados. Se ha visto que la selectividad espectral de la estimulación optogenética es indistinguible de la acústica, y permitió tasas de disparo casi fisiológicas con buena precisión temporal hasta 250 Hz de estimulación. Estudios que compararon un sistema de IC óptico con uno eléctrico concluyen que el uso de optogenética permitiría una restauración de la audición con una selectividad espectral mejorada en comparación con un IC eléctrico.

Hearing loss affects more than 1.5 billion people worldwide. The main means of rehabilitation used are hearing aids and cochlear implants (CI). The electrical CI converts sound into electrical impulses that directly stimulate neurons in the spiral ganglion to provide auditory sensation; it has the disadvantage of a wide spatial dispersion of the current, limiting the spectral resolution and the dynamic range of sound coding, which leads to a poor understanding of speech in noisy environments and a poor appreciation of music. In recent years, the use of optical stimulation instead of electrical stimulation have been studied since it emits stimuli with greater spatial selectivity. Optical CIs have been described using infrared light and others using optogenetic methods, the latter requiring the expression of photosensitive proteins induced by adeno-associated viruses. The spectral selectivity of optogenetic stimulation has been found to be indistinguishable from acoustic stimulation and allowed near-physiological firing rates with good temporal accuracy up to 250 Hz stimulation. Studies comparing an optical and an electrical CI system conclude that the use of optogenetics would allow hearing restoration with improved spectral selectivity compared to an electrical CI.

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Las características anatómicas de pacientes con nariz mestiza, generalmente, incluyen una nariz aparentemente grande, un dorso convexo con radix bajo y una base nasal ancha. La longitud de la columela y punta nasal se ve disminuida debido a que los cartílagos alares son cortos, débiles y delgados, proporcionando un soporte estructural insuficiente, mala definición y proyección de la punta nasal. La principal dificultad al manejar este tipo de narices es un marco osteocartilaginoso mal estructurado y débil. En los últimos años se han desarrollado técnicas quirúrgicas para mejorar los resultados estéticos y funcionales de la rinoplastía en estos pacientes. Se realizó una revisión exhaustiva de la literatura describiendo las técnicas quirúrgicas utilizadas en este tipo de nariz.

The anatomical characteristics of patients with mestizo nose usually include an apparently large nose, a convex dorsum with a deep radix, and a wide nasal base. The length of the nasal columella and tip is decreased because the alar cartilages are short, weak and thin, providing insufficient structural support, poor definition and nasal tip projection. The main difficulty in managing this type of noses is a poorly structured and weak osteocartilaginous framework. In recent years, surgical techniques have been developed to improve the aesthetic and functional results of rhinoplasty in these patients. A comprehensive literature review was conducted describing the surgical techniques used in this type of nose.

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El fresado de hueso temporal (HT) es un desafío para los otorrinolaringólogos. Este procedimiento requiere un conocimiento detallado de esta zona anatómicamente compleja y un dominio de la técnica quirúrgica. La exposición a una mastoidectomía simple o mastoidectomía radical varía entre residentes y distintos programas de especialidad y, frecuentemente, no se cumple el número requerido para la curva de aprendizaje durante la formación. Por lo anterior, surge la necesidad de realizar simulación quirúrgica de fresado de HT. El gold standard para su entrenamiento son los modelos cadavéricos, sin embargo, su costo y baja disponibilidad representan una limitación importante. Los modelos de simulación no cadavéricos podrían jugar un rol importante en el entrenamiento de esta cirugía. Se realizó una revisión exhaustiva de la literatura sobre los modelos de simulación disponibles en fresado de HT. Se encontraron estudios sobre modelos cadavéricos, basados en impresión 3D, realidad virtual y de bajo costo. Los modelos de impresión 3D y realidad virtual han sido evaluados favorablemente en cuanto a adquisición de habilidades, aprendizaje de anatomía, similitud con modelos cadavéricos y sensación táctil. Los modelos de impresión 3D presentan mayor fidelidad anatómica y física, pero tienen un mayor costo. En suma, se han desarrollado modelos de fresado de HT no cadavéricos que cuentan, principalmente, con validez de apariencia y contenido, y solo algunos con validez de constructo. Se necesitan más estudios para evaluar su validez predictiva y transferencia de habilidades al paciente real.

Temporal bone (TB) dissection is a challenging procedure for otolaryngologists. It requires a detailed knowledge of this anatomically complex area and mastery of the surgical technique. Exposure to a simple or radical mastoidectomy may vary among residents and specialty programs, frequently not complying with the required number of surgeries to complete the learning curve during residency. Hence, TB dissection simulation is of great importance. The gold standard for simulated training are cadaveric models, nevertheless, the associated high cost and low availability represent a major limitation for this modality. Non-cadaveric simulation models could play a key role in simulated training for this surgery. A comprehensive review of the literature regarding the available simulation models for TB dissection was conducted. Articles for cadaveric, 3D-printed, virtual reality and low-cost models were identified. 3D-printed and virtual reality models have been favorably evaluated in terms of skill acquisition, anatomy learning, similarity to cadaveric models, and tactile sensation. 3D-printed models present superior anatomic and physical fidelity, but are more expensive. In sum, the current non-cadaveric models for TB dissection mostly present face and content validity, while few models count with construct validity. Further studies are required to assess predictive validity and skill transfer to the real patient.

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Resumen El uso de profilaxis antibiótica en el taponamiento nasal es una práctica ampliamente usada por el eventual riesgo de síndrome de shock tóxico o complicaciones infecciosas locales. En los últimos años, se ha cuestionado su real impacto tomando en cuenta los riesgos asociados al uso de antibióticos y la baja o casi nula incidencia de las complicaciones infecciosas. Se realizó una revisión exhaustiva de la literatura sobre el uso de profilaxis antibiótica en taponamiento nasal. Se observó que no existían diferencias estadísticamente significativas en la incidencia de complicaciones infecciosas y no hubo reportes de síndrome de shock tóxico en ninguno de los grupos con y sin profilaxis antibiótica. No hubo diferencias significativas en los cultivos de los pacientes con o sin antibióticos en taponamiento nasal por epistaxis. El uso de profilaxis antibiótica en taponamiento nasal es una práctica cuestionable y se requieren más estudios al respecto.

Abstract Antibiotic prophylaxis in nasal packing is a widely used practice due to the possible risk of toxic shock syndrome and infectious complications. Lately, its real impact has been questioned due to the associated risks with antibiotic use and low incidence of infectious complications. A comprehensive review of the literature on the use of antibiotic prophylaxis in nasal packing was performed. No statistically significant differences in the incidence of infectious complications and no reports of toxic shock syndrome were reported in any of the groups with and without antibiotic prophylaxis. There were no significant differences in the antibiotic cultures of patients with or without prophylactic antibiotics in nasal packing due to epistaxis. The use of antibiotic prophylaxis in nasal packing is a questionable practice and further studies are required.

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Municipal wastewater phycoremediation represents a promising circular economy-based process for wastewater reclamation used to recover water and produce biomass. This study aimed to evaluate a pilot-scale phycoremediation system, using the most efficient strain of microalgae for wastewater reclamation in the Atacama Desert. Nitrogen and phosphorus removal, as well as biomass growth, were compared in different microalgae treatments, namely Muriellopsis sp., Scenedesmus almeriensis, Chlamydomonas segnis, Chlorella pyrenoidosa and Chlorella vulgaris. The most efficient treatments, Muriellopsis sp. and S. almeriensis, were scaled up to 20-L bubble column reactors to evaluate nutrient removal and biomass biochemical profile for potential biotechnological application. Finally, Muriellopsis sp. was selected for a pilot-scale phycoremediation experiment (800-L raceway), which removed 84% of nitrogen, 93% of phosphorus and other chemical compounds after 4 days of treatment to meet most of the Chilean standards for irrigation water (NCh. 1333. DS. MOP No. 867/78). Faecal coliforms count was reduced by 99.9%. Furthermore, biomass productivity reached 104.25 mg·L-1·day-1 value with 51% protein, and pigment content of 0.6% carotenoid, with 0.3% lutein. These results indicate the potential of wastewater phycoremediation at an industrial scale for the production of irrigation water and carotenoid using Muriellopsis sp.

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Resumen Introducción: Debido a la pandemia por SARS-CoV-2, las consultas presenciales y cirugías electivas fueron suspendidas o disminuidas para evitar la propagación viral hacia pacientes y personal de salud. En nuestro país se ha implementado la telemedicina como canal alternativo de atención. Debido a su reciente implementación en nuestra especialidad a nivel nacional, es importante conocer la percepción del paciente y proveedor sobre ella, con el fin de evaluar su factibilidad como nueva modalidad de atención en el futuro. Objetivo: Evaluar la satisfacción del paciente y del proveedor sobre el uso de telemedicina en Otorrinolaringología en nuestro hospital. Material y Método: Estudio prospectivo observacional. Se adaptaron dos instrumentos de evaluación de satisfacción reportados en la literatura, para el paciente y proveedor de salud. Las encuestas fueron administradas luego de la consulta de telemedicina a través de correo electrónico para el paciente, y como parte de la plataforma de telemedicina para el proveedor y respondidas en forma voluntaria. Las respuestas fueron analizadas utilizando medidas de frecuencia (porcentajes). Resultados: Se recopilaron 51 encuestas de pacientes y 69 de proveedores. En los pacientes, en un 98% la telemedicina facilitó el acceso a atención, siendo del mismo nivel que una presencial (91%). Un 98% volvería a usarla y la recomendaría a familiares o amigos. En los proveedores, el 98% estuvo satisfecho con la teleconsulta y 89% con la plataforma. Conclusión: La atención por telemedicina es satisfactoria para usuario y proveedor en nuestro hospital. Esta es una herramienta valiosa para complementar la atención clínica otorrinolaringológica.

Abstract Introduction: Due to the SARS-CoV-2 pandemic, clinical consults and elective surgeries were suspended or decreased to avoid spreading the disease to patients and health personnel. In our country telemedicine has been implemented as an alternate way to obtain medical attention. Given that this attention paradigm has only been recently implemented in our specialty at the national level, it is important to know the perception of the patient and health care provider in order to evaluate its feasibility as a new modality of care in the future. Aim: To assess the patients and healthcare providers satisfaction regarding the use of telemedicine in the Otorhinolaryngology Department. Material and Method: Prospective observational study. Two satisfaction surveys previously reported in the literature were adapted for the patient and health provider. The surveys were sent after each telemedicine consultation via email to the patient, and as part of the telemedicine platform for the provider and answered voluntarily. The responses were analyzed using proportions. Results: answered surveys were obtained from 51 patients and 69 healthcare providers. In 98% of patient's telemedicine facilitated access to care, which was found to be as good as a clinical consult in 91% of the telehealth visits. 98% would use it again and recommend it to family or friends. In 98% of providers were satisfied with the teleconsultation and 89% with the platform. Conclusion: teleconsultation is satisfactory for both patients and providers in our hospital. This new attention modality is a valuable tool to complement the standard otolaryngologist clinical assessment.

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BACKGROUND: The objective of this study was to describe the bacterial communities associated with pediatric patients with endodontic infections of temporal teeth by targeting the 16S rRNA gene using pyrosequencing. MATERIAL AND METHODS: Microbiological samples were obtained from the lower primary molars of thirteen 13 pediatric patients with dental infections. An aspiration method for microbiological sampling was used. The identification of microbiota employing the pyrosequencing method by targeting the 16S gene was performed. RESULTS: Ribosomal 16S RNA gene sequences were amplified, obtaining a total of 16,182 sequences from 13 primary infected molars (13 different individuals) by pyrosequencing. Bacteroidetes phyla (35.15%) were the most abundant followed by Firmicutes (33.3%) and Fusobacteria (10.05%); the presence of specific pathogenic bacteria was determined as well. CONCLUSIONS: The infected root canal of primary teeth contains a high diversity of anaerobic bacteria, and Bacteroidetes, Firmicutes, and Fusobacteria phyla were the most abundant; Prevotella and Streptococcus genera were the most prevalent.

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