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Journal Article
Review
[Ventilatory Support and Management of Secretions in Amyotrophic Lateral Sclerosis].
Fortschritte der Neurologie-Psychiatrie 2016 October
The term amyotrophic lateral sclerosis (ALS) comprises a group of motor neuron diseases which are characterized by rapid disease progression and poor prognosis which is mostly due to severe respiratory muscle weakness and its sequelae. Since causative treatment options are limited it is crucial to offer comprehensive symptomatic therapies to affect patients. Symptoms of respiratory muscle weakness, sleep-disordered breathing and, subsequently, chronic hypercapnic respiratory failure are known to severely affect health-related quality of life and social functioning of patients with ALS. This review article delineates the clinical presentation of respiratory muscle weakness, diagnostic procedures to assess diaphragmatic function, and practical aspects of both mechanical ventilation and cough assistance, respectively. Various technical and electrophysiological methods allow for detection of diaphragmatic weakness and nocturnal hypoventilation. These include spiro-manometric tests of respiratory muscle strength, cardiorespiratory polygraphy and polysomnography, transcutaneous capnography, and blood gas analysis. Once the diagnosis of respiratory muscle weakness is established, non-invasive ventilation, tracheostomy-invasive ventilation (if the patient agrees to it), and management of secretions all become increasingly important in the course of the disease.
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