Quantifying Muscle Regeneration: Activated Muscle Satellite Cells and New Regenerated Myofibers in Chronic and Acute Degeneration Models.

Regeneration is a remarkable characteristic of the skeletal muscle. Triggered by common lesions, regeneration is stimulated resulting in muscle fiber repair and restoration of muscle homeostasis in normal muscle. In genetic dystrophic muscle, the cycle of degeneration/regeneration is an endless loop that leads to impaired regeneration and substitution of muscle fibers by connective and adipose tissue, causing muscle weakness. Identification and characterization of muscle regeneration steps can help discover potential therapy targets for muscle diseases and aging. Muscle regeneration markers such as the number of satellite cells in the muscle, the proportion of activated satellite cells, and the quantity of regenerating muscle fiber can be quantified using immunolabeling.Here we are presenting a quantitative method to measure muscle regeneration that can be applied to different proposals. To demonstrate the protocol applicability, we used models for acute and chronic muscle injuries. As model of acute degeneration, a wild-type C57BL6 mice with muscle injury induced by electroporation was used, and the muscle was analyzed after 5 and 10 days post-injury. DMDmdx mouse muscle was used as a model of chronic degeneration. The methodologies presented here are among the gold standard methodologies for muscle regeneration analysis and can be easily applied to any type of muscle regeneration study.

Cuidados respiratorios en pacientes con atrofia muscular espinal para evitar el fallo ventilatorio agudo y la traqueostomía: revisión literaria y recomendaciones consensuadas / Respiratory care in patients with spinal muscular atrophy to avoid acute ventilatory failure and tracheostomy: literature review and consensus recommendations

La atrofia muscular espinal (AME) 5q es una de las enfermedades neuromusculares de mayor incidencia en la infancia. Sin embargo, la prevalencia de AME tipo 1, su forma más severa de presentación, es menor debido a muertes prematuras evitables antes de los dos años por insuficiencia ventilatoria subtratada. La irrupción de nuevos tratamientos modificadores de la enfermedad pueden cambiar dramáticamente este pronóstico y es una oportunidad para actualizar el manejo respiratorio, a través de cuidados estandarizados básicos, preferentemente no invasivos, abordando la debilidad de los músculos respiratorios, la insuficiencia tusígena y ventilatoria, con un enfoque preventivo. La siguiente revisión literaria entrega estrategias para evitar la intubación y la traqueostomía usando soporte ventilatorio no invasivo (SVN), reclutamiento de volumen pulmonar (RVP) y facilitación de la tos. Se analizan en detalle los protocolos de extubación en niños con AME tipo 1.

Spinal muscular atrophy (SMA) 5q is one of the neuromuscular diseases with the highest incidence in childhood. Nevertheless, the prevalence of its most severe form SMA1 is lower due to premature preventable deaths before two years of age related to ventilatory insufficiency undertreated. The emergence of new disease-modifying treatments can dramatically change this prognosis and is an opportunity to update respiratory management, through basic standardized care, mostly non-invasive, addressing respiratory muscles pump weakness, cough and ventilatory insufficiency with a preventive approach. This literature review provides consensus recommendations for strategies to avoid intubation and tracheostomy using noninvasive ventilatory support (NVS), lung volume recruitment (LVR), and cough facilitation. Extubation protocols in children with SMA type 1 are analyzed in detail.

Quality of life assessment instruments in children and adolescents with neuromuscular diseases: a systematic scoping review.

OBJECTIVE: (1) To identify instruments used to assess quality of life (QoL) in children and adolescents with neuromuscular diseases; (2) To identify the psychometric properties contained in these instruments. METHODS: This is a scoping review in which the electronic databases Embase, Scielo, Scopus, Pubmed and Lilacs were used as well as grey literature. The following terms were used in the search for articles published in the last 10 years: children, adolescents, neuromuscular disease, and quality of life. RESULTS: In total, 15 articles were included and evaluated, indicating 7 instruments used to assess QoL (PedsQL™ Inventory 3.0 Neuromuscular Module, the PedsQL™ 4.0, the PedsQL DMD Module, the PedsQL ™ MFS, the SOLE, the KIDSCREEN and the LSI-A). The number of items ranged from 17 to 45. In addition, 6 instruments showed psychometric properties, but only 2 showed good and high quality, either in internal reliability or reproducibility. CONCLUSION: Our results were able to map the main QoL assessment instruments of children and adolescents with neuromuscular disease and the most cited instrument was the PedsQL™ Inventory 3.0 Neuromuscular Module. Larger studies that assess psychometric properties and that are validated for most diseases are needed.

Induced degeneration and regeneration in aged muscle reduce tubular aggregates but not muscle function.

Introduction: Tubular aggregates (TA) are skeletal muscle structures that arise from the progressive accumulation of sarcoplasmic reticulum proteins. Cytoplasmic aggregates in muscle fibers have already been observed in mice and humans, mainly during aging and muscle disease processes. However, the effects of muscle regeneration on TA formation have not yet been reported. This study aimed to investigate the relationship between degeneration/regeneration and TA in aged murine models. We investigated the presence and quantity of TA in old males from two murine models with intense muscle degeneration and regeneration. Methods: One murine lineage was a Dmdmdx model of Duchenne muscular dystrophy (n = 6). In the other model, muscle damage was induced by electroporation in C57BL/6J wild-type mice, and analyzed after 5, 15, and 30 days post-electroporation (dpe; n = 15). Regeneration was evaluated based on the quantity of developmental myosin heavy chain (dMyHC)-positive fibers. Results: The frequency of fibers containing TA was higher in aged C57BL/6J (26 ± 8.3%) than in old dystrophic Dmdmdx mice (2.4 ± 2%). Comparing the data from induced degeneration/regeneration in normal mice revealed a reduced proportion of TA-containing fibers after 5 and 30 dpe. Normal aged muscle was able to regenerate and form dMyHC+ fibers, mainly at 5 dpe (0.1 ± 0.1 vs. 16.5 ± 2.6%). However, there was no difference in force or resistance between normal and 30 dpe animals, except for the measurements by the Actimeter device, which showed the worst parameters in the second group. Discussion: Our results suggest that TA also forms in the Dmdmdx muscle but in smaller amounts. The intense degeneration and regeneration of the old dystrophic model resulted in the generation of new muscle fibers with a lower quantity of TA. Data from electroporated wild-type mice support the idea that muscle regeneration leads to a reduction in the amount of TA. We suggest that TA accumulates in muscle fibers throughout physiological aging and that regeneration leads to the formation of new fibers without these structures. In addition, these new fibers do not confer functional benefits to the muscle.

Utility of exome sequencing for the diagnosis of pediatric-onset neuromuscular diseases beyond diagnostic yield: a narrative review.

Diagnosis of neuromuscular diseases (NMD) can be challenging because of the heterogeneity of this group of diseases. This review aimed to describe the diagnostic yield of whole exome sequencing (WES) for pediatric-onset neuromuscular disease diagnosis, as well as other benefits of this approach in patient management since WES can contribute to appropriate treatment selection in NMD patients. WES increases the possibility of reaching a conclusive genetic diagnosis when other technologies have failed and even exploring new genes not previously associated with a specific NMD. Moreover, this strategy can be useful when a dual diagnosis is suspected in complex congenital anomalies and undiagnosed cases.

Trajectories of motor function in children with Duchenne muscular dystrophy: A longitudinal study on a Colombian population.

Duchenne Muscular Dystrophy (DMD) is characterized by an initial increase in motor function followed by a plateau phase and then entering a phase of steady decline. However, motor evolution of DMD have not been evaluated in developing countries. Therefore, this study aims to evaluate the trajectory of motor function in a sample of Colombian children with DMD. We included 119 children with DMD aged 4.8-19.3 years (mean follow-up = 1.7 years). A linear mixed model was used with age as the time scale and adjusted for covariates using a stepwise regression. Participants showed a progressive decline in motor skills from the age of 5 years with a decrease in speed around the age of 11 years (p < 0.001). After age 11, the decline in motor function was observed to continue until age 20 but at a slower rate (ßAge = -9.64. and ßAge2 = 0.18, p < 0.001 for both). Educational inclusion, glucocorticoid treatment and the number of mutated exons were shown to be associated with the motor performance. These findings may indicate that the evolution of DMD maintains similar patterns between high income countries and the Colombian population. They allow us to adapt and develop treatments that impact the population with DMD in Colombia, based in international evidence.

Terapia con cánula nasal de alto flujo en pacientes pediátricos en domicilio / High flow nasal cannula therapy in pediatric patients at home

Se realiza comentario de estudio de Israel en el cual analizan 75 pacientes pediátricos que utilizaron cánula nasal de alto flujo (CNAF) en domicilio, evaluando la seguridad, las indicaciones, los parámetros de utilización, la duración del tratamiento, los resultados clínicos y la satisfacción de los padres. Se acompaña de una revisión de la literatura del tema.

A comment is made on a study conducted in Israel analyzing 75 pediatric patients who used high-flow nasal cannula at home, evaluating safety, indications, utilization parameters, treatment duration, clinical outcomes, and parental satisfaction. It is accompanied by a literature review on the topic.

Impact of the motor function of individuals with spinal muscular atrophy on caregiver burden / Impacto de la función motora de los individuos con atrofia muscular espinal en la carga de sus cuidadores / Impacto da função motora de indivíduos com atrofia muscular espinhal na sobrecarga de seus cuidadores

ABSTRACT Spinal Muscular Atrophy (SMA) is a neurodegenerative disease that impairs motor function, justifying the help of a caregiver. This study aimed to analyze the impact of the motor function of individuals with SMA on caregiver burden. This is a cross-sectional study of 32 individuals with SMA and 27 caregivers, carried out in a rehabilitation center, using the identification questionnaire, anamnesis and sociodemographic profile, Motor Function Measurement Scale and Burden Interview. Motor function and caregiver burden were compared between SMA types using the analysis of covariance (ANCOVA) and correlated using Pearson's correlation test. Individuals with SMA type I had greater impairment of motor function when compared to types II and III, and individuals with type III had better scores in all domains of motor function. No correlation was observed between motor function and caregiver burden: however, most caregivers presented some level of burden, especially those from mild to moderate. Moderate to severe burden was found in caregivers with SMA in a considerable prevalence, which requires care and attention from health professionals.

RESUMEN La atrofia muscular espinal (AME) es una enfermedad neurodegenerativa que provoca un deterioro de la función motora, por lo que requiere la asistencia de cuidadores. El objetivo de este estudio fue analizar el impacto de la función motora de los individuos con AME en la carga de sus cuidadores. Se trata de un estudio transversal, realizado en un centro de rehabilitación con 32 individuos con AME y 27 cuidadores, utilizando como metodología el cuestionario de identificación, anamnesis y perfil sociodemográfico, la escala de medida de la función motora y la entrevista de carga. La función motora y la carga de los cuidadores se compararon entre los tipos de AME mediante el análisis de covarianza (Ancova) y se correlacionaron mediante la prueba de correlación de Pearson. Los individuos con AME tipo I tuvieron un mayor deterioro de la función motora en comparación con los tipos II y III, y los individuos de tipo III obtuvieron mejores puntuaciones en todos los dominios de la función motora. No se encontró correlación entre la función motora y la carga del cuidador, pero la mayoría de los cuidadores tenían algún nivel de carga, en particular de leve a moderada. Se encontró una carga de moderada a grave en los cuidadores con AME con una prevalencia considerable, lo que requiere cuidados y atención por parte de los profesionales de la salud.

RESUMO Atrofia muscular espinhal (AME) é uma doença neurodegenerativa que provoca comprometimento na função motora, justificando o auxílio de cuidador. O objetivo deste estudo foi analisar o impacto da função motora de indivíduos com AME na sobrecarga de seus cuidadores. Trata-se de um estudo transversal realizado em um centro de reabilitação com 32 indivíduos portadores de AME e 27 cuidadores, utilizando como metodologia o questionário de identificação, anamnese e perfil sociodemográfico, a escala da medida da função motora e Burden Interview. A função motora e a sobrecarga do cuidador foram comparadas entre os tipos de AME por meio da Análise da Covariância (Ancova) e correlacionadas pelo teste de correlação de Pearson. Os indivíduos com AME tipo I apresentaram maior comprometimento da função motora quando comparado entre os tipos II e III, e indivíduos tipo III apresentaram melhores escores em todos os domínios da função motora. Não foi percebida correlação entre função motora e sobrecarga de cuidador, entretanto encontramos a maior parte dos cuidadores apresentando algum nível de sobrecarga, com destaque ao de leve a moderado. A sobrecarga moderada a severa foi encontrada nos cuidadores com AME em uma prevalência considerável, o que requer cuidado e atenção dos profissionais de saúde.

Physical therapy for the management of motor symptoms in amyotrophic lateral sclerosis: protocol for a systematic review.

INTRODUCTION: The prescription of an intervention plan can be challenging for the physical therapist, considering clinical phenotypes, individual prognosis and the rapid, progressive and deteriorating nature of amyotrophic lateral sclerosis (ALS). In this context, therapeutic exercises (eg, resistance and aerobic exercises) for patients with ALS remain controversial and may influence the treatment plan. Therefore, this review aims to critically assess whether physical therapy interventions are effective for improving functional capacity, quality of life and fatigue of individuals with ALS. METHODS AND ANALYSIS: Studies will be selected according to eligibility criteria, and language, geographical area or publication date will not be restricted. Four databases will be used: MEDLINE, EMBASE, Cochrane Library (CENTRAL) and Physiotherapy Evidence Database (PEDro). Searches will also be conducted on ClinicalTrials.gov and references from included studies. We plan to conduct the searches between October and December 2022. Two independent authors will examine titles and abstracts and exclude irrelevant studies and duplicates. We will assess the quality of studies and quality of evidence, and disagreements will be resolved with a third researcher. The findings will be presented in the text and tables; if possible, we will perform meta-analyses. ETHICS AND DISSEMINATION: No ethical approval is required because this study does not involve human beings. We will publish our findings in peer-reviewed journals. PROSPERO REGISTRATION NUMBER: CRD42021251350.

Nutritional therapy in amyotrophic lateral sclerosis: protocol for a systematic review and meta-analysis.

INTRODUCTION: Amyotrophic lateral sclerosis (ALS) is a complex neurodegenerative disease characterised by the degeneration of motor neurons. Nutritional interventions in ALS are essential and must be based on scientific evidence to provide quality of healthcare, improve the quality of life and increase survival time. Therefore, this protocol of systematic reviews and meta-analyses aims to present a synthesis of evidence-based recommendations to support adequate nutrition therapy for patients with ALS. METHODS AND ANALYSIS: The search will be performed using the following databases: PubMed, Excerpta Medica Database (Embase), Scopus, SciELO, Web of Science, LILACS, Cochrane Central Register of Controlled Trials (CENTRAL), ScienceDirect, ProQuest and Google Scholar. We will include clinical practice guidelines, treatment protocols, systematic reviews and clinical trials according to the three research questions to be answered related to nutrition therapy and interventions in patients with ALS. This protocol will be developed in accordance with the Preferred Reporting Items for Systematic Review and Meta-analysis Protocols. To evaluate the methodological quality of the studies, Appraisal of Guidelines, Research and Evaluation II, Cochrane Risk of Bias 2.0 and Risk of Bias In Non-randomized Studies of Interventions (ROBINS-I) tools will be used. In addition, the Grading of Recommendations Assessment, Development and Evaluation will be used to assess the quality of evidence and the strength of the recommendations. The findings will be summarised and presented descriptively according to the Cochrane Collaboration Handbook and the standard statistical meta-analysis techniques. ETHICS AND DISSEMINATION: Ethical approval and human consent are not required because this is a protocol for systematic review and only secondary data will be used. Findings will be published in a peer-reviewed journal and presented at conferences. In case of any changes in this protocol, amendments will be updated in International Prospective Register of Systematic Reviews (PROSPERO) and the modifications will be explained in the final report of this review. PROSPERO REGISTRATION NUMBER: CRD42021233088.

Feasibility of total hip arthroplasty in cerebral palsy patients: a systematic review on clinical outcomes and complications.

PURPOSE: Total hip arthroplasty (THA) is a successful treatment for hip osteoarthritis secondary to hip dysplasia. However, the reported rate of complications following THA in the settings of neuromuscular diseases is high. This systematic review aimed to analyze the indications, functional outcomes and surgical failures of primary THA in cerebral palsy (CP) patients. METHODS: MEDLINE, EMBASE and the Cochrane Database of Systematic Reviews were searched, and all clinical studies focusing on THA in patients with CP from inception through March 2020 were included. The methodological quality was assessed with Guo et al.'s quality appraisal checklist for case series and case-control studies, while cohort and prospective studies were evaluated with a modified version of the Downs and Black's quality assessment checklist. RESULTS: The initial search returned 69 studies out of which 15, including 2732 THAs, met the inclusion criteria. The most frequent indication for THA was dislocated painful hip for which previous non-operative treatment had failed. Complications presented in 10 to 45% of cases. The most frequently reported complication was dislocation (1-20%), followed by component loosening (0.74-20%). Aseptic component loosening was the most frequent cause of revision surgery, followed by dislocation and periprosthetic fracture. Mean implant survival at ten years was 84% (range 81-86%). CONCLUSION: The available literature suggests that although THA is a beneficial procedure in CP patients, it has a higher rate of complications and worse implant survival than the general population.

Remote versus face-to-face home-based exercise programme in people with amyotrophic lateral sclerosis: protocol for a randomised clinical trial.

INTRODUCTION: Amyotrophic Lateral Sclerosis (ALS) is a progressive neurodegenerative disease with variable and complex clinical manifestations that requires a multidisciplinary approach. However, face-to-face treatment in this population may experience barriers, such as difficulty accessing physical therapists or other professionals. As a result, strategies (eg, telerehabilitation) emerged to facilitate treatment and physical therapy monitoring. This study aims to evaluate the effects of remote versus face-to-face home-based exercise programmes on clinical outcomes and treatment adherence of people with ALS. METHODS AND ANALYSIS: This is a single-blind randomised clinical trial protocol that will include 44 people with clinical diagnosis of ALS at any clinical stage and aged between 18 and 80 years. Participants will be randomised into two groups after face-to-face evaluation and perform a home-based exercise programme three times a week for 6 months. A physical therapist will monitor the exercise programme once a week remotely (phone calls-experimental group) or face-to-face (home visits-control group). The primary outcome measure will be functional capacity (Amyotrophic Lateral Sclerosis Functional Rating Scale-Revised). Secondary outcomes will include disease severity (Amyotrophic Lateral Sclerosis Severity Scale), fatigue (Fatigue Severity Scale), pain (Visual Analogue Scale and body pain diagram), adverse events and adherence rate. Outcomes will be initially evaluated face-to-face and revaluated remotely every 2 months and 1 month after interventions. Linear mixed models will compare outcome measures between groups and evaluations (α=5%). ETHICS AND DISSEMINATION: This study was approved by the research ethics committee of Hospital Universitário Onofre Lopes/Universidade Federal do Rio Grande do Norte (no. 3735479). We expect to identify the effects of an exercise programme developed according to ALS stages and associated with remote or face-to-face monitoring on clinical outcomes using revaluations and follow-up after interventions. TRIAL REGISTRATION NUMBER: Brazilian Registry Clinical Trials (RBR-10z9pgfv).

Weaning from mechanical ventilation in people with neuromuscular disease: a systematic review.

OBJECTIVE: This systematic review aimed in assessing the effects of different weaning protocols in people with neuromuscular disease (NMD) receiving invasive mechanical ventilation, identifying which protocol is the best and how different protocols can affect weaning outcome success, duration of weaning, intensive care unit (ICU) and hospital stay and mortality. DESIGN: Systematic review. DATA SOURCES: Electronic databases (MEDLINE, EMBASE, Web of Science and Scopus) were searched from January 2009 to August 2020. ELIGIBILITY CRITERIA FOR SELECTING STUDIES: Randomised controlled trials (RCTs) and non-RCT that evaluated patients with NMD (adults and children from 5 years old) in the weaning process managed with a protocol (pressure support ventilation; synchronised intermittent mandatory ventilation; continuous positive airway pressure; 'T' piece). PRIMARY OUTCOME: Weaning success. SECONDARY OUTCOMES: Weaning duration, ICU stay, hospital stay, ICU mortality, complications (pneumothorax, ventilation-associated pneumonia). DATA EXTRACTION AND SYNTHESIS: Two review authors assessed the titles and the abstracts for inclusion and reviewed the full texts independently. RESULTS: We found no studies that fulfilled the inclusion criteria. CONCLUSIONS: The absence of studies about different weaning protocols for patients with NMD does not allow concluding the superiority of any specific weaning protocol for patients with NMD or determining the impact of different types of protocols on other outcomes. The result of this review encourages further studies. PROSPERO REGISTRATION NUMBER: CRD42019117393.

Decanulación en Paciente Pediátrica con Enfermedad Neuromuscular: reporte de caso

RESUMEN La enfermedad de multiminicores es un trastorno neuromuscular hereditario caracterizado por la presencia de múltiples 'cores' en biopsia muscular y características clínicas de una miopatía congénita. El presente caso trata de una paciente de 10 años de edad, con diagnóstico de enfermedad neuromuscular multiminicores, traqueostomizada desde los 7 años de edad por destete fallido y debilidad muscular. La paciente fue derivada al Departamento de Rehabilitación Cardio-respiratoria del hospital de Clínicas de la Facultad de Ciencias Médicas de la Universidad Nacional de Asunción, presentando en su primera evaluación dependencia crónica de oxígeno (por más de 12 meses), tos débil y no funcional con flujo pico tosido e inferior a 160 L/m, insuficiencia respiratoria crónica e hipercapnia (53 mmHg de CO2ET). Durante su seguimiento en nuestro departamento fueron seguidas las pautas de Rehabilitación Respiratoria contempladas en el Proyecto de evaluación, tratamiento y seguimiento de pacientes con Enfermedades Neuromusculares, y aprobado por el Consejo Superior de la Facultad de Ciencias Médicas de la Universidad Nacional de Asunción, dichas pautas están fundamentadas en los estudios y publicaciones científicas del Dr. John Bach (Rudgers University, Newart, Nueva Jersey-EEUU) y su equipo colaborador del Grupo Iberoamericano de Cuidados Respiratorios en Enfermedades Neuromusculares. Como resultado final del tratamiento y seguimiento aplicado por más de un año la paciente fue decanulada exitosamente, en un consultorio para pacientes ambulatorios, sin descompensaciones hemodinámicas, con una excelente tolerancia y sin requerimiento de internaciones hospitalarias.

ABSTRACT Multiminicores disease is a hereditary neuromuscular disorder characterized by the presence of multiple 'nuclei' on muscle biopsy and clinical features of a congenital myopathy. The present case concerns a 10-year-old patient, diagnosed with multiminicores disease, tracheostomized since she was seven due to failed weaning and muscle weakness. The patient was referred to the Department of Cardio-respiratory Rehabilitation of the Clínicas Hospital from the National University of Asunción, presenting in her first evaluation chronic oxygen dependence (for more than 12 months), weak and non-functional cough with cough peak flow less than 160 L / m, chronic respiratory failure and hypercapnia (52 mmHg CO2ET). We did the follow-up in order to the Respiratory Rehabilitation guidelines contemplated in the Project for the evaluation, treatment and follow-up of patients with Neuromuscular Diseases, which was approved by the Superior Council of the Medical Sciences School from the National University of Asunción, these guidelines are based on scientific studies and publications done by Dr. John Bach (Rudgers University, Newart, New Jersey-USA) and his collaborating team from the Ibero-American Group for Respiratory Care in Neuromuscular Diseases. As a result, the patient was successfully decannulated, in an outpatient clinic, without hemodynamic decompensations, with excellent tolerance and without the requirement of hospital admissions.

Validación del Cuestionario pediátrico de calidad de vida™ (Pediatric Quality of Life Inventory™) Módulo neuromuscular, versión 3. 0 en español para Argentina / Validation of the Pediatric Quality of Life Inventory™, Neuromuscular Module, version 3. 0 in Spanish for Argentina

Objetivo: Evaluar las propiedades psicométricas del Cuestionario pediátrico de calidad de vida (PedsQLTM 3.0) Módulo Neuromuscular, versión en español para Argentina, en niños entre 2 y 18 años con enfermedades neuromusculares. Población y métodos: Estudio observacional, analítico, prospectivo, de validación, realizado en el Hospital Garrahan entre el 19 de marzo de 2019 y el 9 de marzo de 2020. A los 10-15 días se realizó el retest del cuestionario para validar en los pacientes que reportaron estabilidad. Resultados: Participaron 185 niños y sus padres. Sobre la factibilidad de la herramienta, los participantes comprendieron fácilmente su contenido. La confiabilidad resultó aceptable, con una consistencia interna de 0,82 en niños y 0,87 en padres y un coeficiente de correlación intraclase en el retest de 0,70 en niños y 0,82 en familiares. Sobre la validez del constructo se confirmaron 8 de 11 hipótesis establecidas (72,7 %). Conclusión: El cuestionario fue validado en sus propiedades psicométricas

Objective: To assess the psychometric properties of the Pediatric Quality of Life Inventory™ (PedsQL™ 3.0), Neuromuscular Module, version in Spanish for Argentina, for children aged 2-18 years with neuromuscular disease. Population and methods: Observational, analytical, prospective validation study conducted in Hospital Garrahan between March 19th, 2019 and March 9th, 2020. The retest questionnaire was administered 10-15 days later to validate it among patients who reported a stable condition. Results: A total of 185 children and their parents participated. In terms of the questionnaire's feasibility, its content was easily understood by participants. Its reliability was acceptable, with an internal consistency of 0.82 among children and 0.87 among parents and a retest intraclass correlation coefficient of 0.70 among children and 0.82 among parents. In relation to the construct validity, 8 of the 11 hypotheses established (72.7 %) were confirmed. Conclusion: The questionnaire's psychometric properties were validated.

Validation of the Pediatric Quality of Life Inventory™, Neuromuscular Module, version 3.0 in Spanish for Argentina. / Validación del Cuestionario pediátrico de calidad de vida™ (Pediatric Quality of Life Inventory™) Módulo neuromuscular, versión 3.0 en español para Argentina.

OBJECTIVE: To assess the psychometric properties of the Pediatric Quality of Life Inventory™ (PedsQL™ 3.0), Neuromuscular Module, version in Spanish for Argentina, for children aged 2-18 years with neuromuscular disease. POPULATION AND METHODS: Observational, analytical, prospective validation study conducted in Hospital Garrahan between March 19th, 2019 and March 9th, 2020. The retest questionnaire was administered 10-15 days later to validate it among patients who reported a stable condition. RESULTS: A total of 185 children and their parents participated. In terms of the questionnaire's feasibility, its content was easily understood by participants. Its reliability was acceptable, with an internal consistency of 0.82 among children and 0.87 among parents and a retest intraclass correlation coefficient of 0.70 among children and 0.82 among parents. In relation to the construct validity, 8 of the 11 hypotheses established (72.7 %) were confirmed. CONCLUSION: The questionnaire's psychometric properties were validated.

Objetivo: Evaluar las propiedades psicométricas del Cuestionario pediátrico de calidad de vida (PedsQLTM 3.0) Módulo Neuromuscular, versión en español para Argentina, en niños entre 2 y 18 años con enfermedades neuromusculares. Población y métodos: Estudio observacional, analítico, prospectivo, de validación, realizado en el Hospital Garrahan entre el 19 de marzo de 2019 y el 9 de marzo de 2020. A los 10-15 días se realizó el retest del cuestionario para validar en los pacientes que reportaron estabilidad. Resultados: Participaron 185 niños y sus padres. Sobre la factibilidad de la herramienta, los participantes comprendieron fácilmente su contenido. La confiabilidad resultó aceptable, con una consistencia interna de 0,82 en niños y 0,87 en padres y un coeficiente de correlación intraclase en el retest de 0,70 en niños y 0,82 en familiares. Sobre la validez del constructo se confirmaron 8 de 11 hipótesis establecidas (72,7 %). Conclusión: El cuestionario fue validado en sus propiedades psicométricas.

Vaccination as a possible trigger for immune-mediated necrotising myopathy.

Immune-mediated necrotising myopathy is a rare autoimmune myopathy characterised by severe progressive muscle weakness, elevated levels of creatine kinase (CK), and necrosis with minimal inflammatory cell infiltration on muscle biopsy. We report a case of a previously healthy 42-year-old woman who presented with progressive muscle weakness 2 weeks after immunisation for yellow fever, tetanus/diphtheria and hepatitis B. Her symptoms started from the lower limbs and progressed to the upper limbs and cervical region associated with dysphagia, making her wheelchair bound. Electromyography showed a myopathic pattern, with a CK level of 12.177 U/L (reference value: 26-190 U/L), and biceps brachial muscle biopsy confirmed necrosis and regeneration fibres. The immunoblot test was positive for antisignal recognition particle. She was successfully treated with prednisone (1 mg/kg/day). Although considered safe, vaccines may cause allergic reactions or trigger autoimmune disorders. Currently, a causal relationship between them cannot be established.

Knowledge of healthcare professionals about poliomyelitis and postpoliomyelitis: a cross-sectional study

ABSTRACT BACKGROUND: Postpoliomyelitis syndrome is a clinical condition that can affect poliomyelitis survivors. OBJECTIVE: Our aim was to evaluate knowledge of poliomyelitis and postpoliomyelitis syndrome among Brazilian healthcare professionals. DESIGN AND SETTING: Cross-sectional study conducted at a Brazilian public higher education institution located in the state of Goiás. METHODS: The participants (n = 578) were Brazilian physicians, physical therapists, nurses, nutritionists and psychologists. A self-administered questionnaire (30 questions) was designed to probe knowledge about poliomyelitis and postpoliomyelitis syndrome. From the questionnaire, we created a structured test to objectively evaluate the knowledge of these professionals. The test was composed of 20 questions and was scored over a range from 0 (totally ill-informed) to 20 (totally well-informed). RESULTS: In general, the physicians, physical therapists and nurses demonstrated better understanding of poliomyelitis and postpoliomyelitis syndrome. The healthcare professionals who had received previous information about poliomyelitis and postpoliomyelitis syndrome had significantly higher scores than those who had never received information (P < 0.001). On average, this difference was approximately 28.6%. CONCLUSIONS: The findings from the present study indicate that there is a critical need for improvement of knowledge about postpoliomyelitis syndrome among Brazilian healthcare professionals. The services provided by these professionals may therefore become compromised. Furthermore, public healthcare initiatives should be implemented to improve knowledge among healthcare professionals.

Effects of an optimised approach to home-based respiratory care in individuals with amyotrophic lateral sclerosis: a study protocol for a randomised controlled trial.

INTRODUCTION: This study aims to investigate the effects of an optimal home-based respiratory care protocol in individuals with amyotrophic lateral sclerosis (ALS). METHODS AND ANALYSIS: This is a randomised, blinded controlled trial involving patients diagnosed with ALS, both sexes, age between 18 and 80 years. Patients will be randomly allocated into the conventional respiratory care (CRC) group and the optimised respiratory care home-based (ORC) group. Primary outcomes will be peak cough flow, the number of exacerbations and ALS Functional Rating Scale Revised. Secondary outcomes will include chest wall volumes, maximal respiratory pressures, sniff nasal inspiratory pressure, nasal expiratory pressure and forced vital capacity (FVC), forced expiratory volume in the 1st second (FEV1) and FEV1/FVC. The CRC group will receive educational information about respiratory care at the clinic. The ORC group will receive conventional care and home-based care. The clinical status of all individuals will be monitored weekly through telephone calls. A 6-month intervention is planned, the outcomes will be assessed every 3 months and 3 and 6 months follow-up after final evaluation. The primary and secondary results will be described as average or median for continuous variables and absolute and relative frequencies for qualitative variables. Treatment effects or differences between the outcomes (baseline, 3 months and 6 months) of the study groups will be analysed using an analysis of variance. The level of significance will be set as p≤0.05. ETHICS AND DISSEMINATION: The research ethics committee approved the study. It is expected to evaluate respiratory function in patients with ALS in the short, medium and long terms with home-based care protocol applied. The disease's rapid progression is a limitation for performing a long-term clinical study. TRIAL REGISTRATION NUMBER: RBR-3z23ts; Pre-results.

Descripción clínica de pacientes pediátricos con enfermedades neuromusculares en una muestra de población chilena / Clinical description of pediatric patients with neuromuscular diseases in a Chilean population sample

OBJETIVO: Describir clínica y diagnóstico de 152 pacientes pediátricos asistentes al policlínico del Programa de Enfermedades Neuromusculares (ENM) en un centro terciario de la Región Metropolitana, Chile. METODOLOGÍA: Revisión de fichas programa EMN (2012-2016). RESULTADOS: 49% niñas, mediana de edad: 9 años (rango, 0­18), consultan por alteraciones de la marcha, debilidad e hipotonía. Segmentos más afectados son músculo y nervio periférico (92%). Diagnósticos más frecuentes son neuropatías adquiridas (26,1%), distrofias musculares (14,8%) y trastornos miotónicos (12,7%). Comorbilidades más frecuentes son patología traumatológica (23,2%) y discapacidad intelectual (13,4%). Los pacientes con patología hereditaria tienen mayor chance de requerir ventilación mecánica (OR 15,4; IC 95% 1,9­119,2) y presentar morbilidad traumatológica (OR 4,1; IC 1,03­16,4) que los con patología adquiridas. Confirmación genético-molecular en 38,4% de los pacientes con patología hereditaria. CONCLUSIONES: El conocimiento de características clínicas y posibilidades de estudio de las ENM puede mejorar las estrategias de atención.

INTRODUCTION: Neuromuscular diseases (NMS) represent a heterogeneous group of acquired and hereditary pathologies that affect the motor unit. There are few descriptive studies of patients with NMS in Chile and Latin America. OBJECTIVES: To clinically and epidemiologically characterize the pediatric population attending a polyclinic run using the NMS program of a hospital in the Metropolitan Region in Chile. Methodology: A review was made of database and clinical records of patients diagnosed with NMS between January 2012 and December 2016. RESULTS: A total of 142 patients, 51% of whom were male, with a median age 9 years (0-18 years), were included. The most frequent reasons for consultation were altered gait, decreased strength, and hypotonia. The most frequently affected segments were muscles and peripheral nerves (92% of the sample). The most frequent diagnoses were acquired neuropathies (26.1%), muscular dystrophies (14.8%), and myotonic disorders (12.7%). The most frequent comorbidities were traumatological pathologies (23.2%) and intellectual disabilities (13.4%). When comparing NMS with hereditary vs. acquired etiologies, those with hereditary etiologies had a higher risk of requiring mechanical ventilation (OR 15.4 [95%CI 1.9-119.2]) and having a traumatological disease (OR 4.1 [CI 1.03-16.4]) compared to those with acquired etiologies. For 38.4% of patients with hereditary etiologies, confirmation was obtained through molecular genetic testing. CONCLUSIONS: This study provides information on the frequency of NMS and their main comorbidities in a Chilean pediatric sample. These results provide information regarding current possibilities for studies and could aid in planning care for these patients in our country. Keywords: Neuromuscular disease, Muscular disease, Neuropathies, Neurological Diagnostic.