SHORT OVERVIEW OF ALSAmyotrophic lateral sclerosis (ALS) is characterized by progressive degeneration of both cortical and alpha motor neurons of the final common pathway. Despite being a progressive degenerative process which primarily affects motor systems, ALS is now recognized to involve several non-motor systems and in long survivors affects many subcortical structures. Many hypotheses have been formulated about what causes ALS, including chemical exposures, occupational exposure, military service, infectious agents, nutritional intake, physical activity, and trauma. Worldwide, ALS affects white males aged > 60 years more often than any other group 1 . In the past three decades new practice parameters to the clinical care in ALS were developed and several clinical trials were performed². As ALS remains as an incurable, progressive and fatal condition, the treatment strategies are focused in improving the quality of life 3 . The only effective pharmacological treatment is Riluzole, a putative glutamate release blocker linked to modestly prolonged survival 2 . Other therapeutic measures concerning respiratory support are outlined in this paper.
PULMONARY FUNCTION IN ALS
Respiratory muscle strengthProgressive weakness remains the foremost characteristic of ALS. However, while some ALS patients progress rapidly, others have slow progression of muscle weakness;
ABSTRACTAmyotrophic lateral sclerosis is a progressive neuromuscular disease, resulting in respiratory muscle weakness, reduced pulmonary volumes, ineffective cough, secretion retention, and respiratory failure. Measures as vital capacity, maximal inspiratory and expiratory pressures, sniff nasal inspiratory pressure, cough peak flow and pulse oximetry are recommended to monitor the respiratory function. The patients should be followed up by a multidisciplinary team, focused in improving the quality of life and deal with the respiratory symptoms. The respiratory care approach includes airway clearance techniques, mechanically assisted cough and noninvasive mechanical ventilation. Vaccination and respiratory pharmacological support are also recommended. To date, there is no enough evidence supporting the inspiratory muscle training and diaphragmatic pacing.Keywords: amyotrophic lateral sclerosis, respiratory function, rehabilitation.
RESUMOEsclerose lateral amiotrófica é uma doença neuromuscular progressiva que resulta em fraqueza muscular, redução dos volumes pulmonares, tosse ineficaz, retenção de secreção e insuficiência respiratória. Medidas como a capacidade vital, pressão inspiratória e pressão expiratória máximas, pressão inspiratória máxima nasal, pico de fluxo de tosse e oximetria de pulso são recomendados para monitorar a função respiratória. Os pacientes devem ser acompanhados por uma equipe multidisciplinar, buscando melhorias na qualidade de vida e melhores estratégias para lidar com os sintomas respiratórios. A abordagem de cuidados respiratórios inclui técnicas de desobstrução das vias respiratórias, tosse assistida mecanicamente e ventilaç...