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La polineuropatia y la miopatia del paciente critico son complicaciones frecuentes en la UCI que se caracterizan por debilidad muscular generalizada incluyendo la limitacion en el destete de la ventilacion mecanica, prolongando la estancia hospitalaria y el riesgo de otras complicaciones. Causan discapacidad cronica en los sobrevivientes de la enfermedad critica debido a cambios funcionales y estructurales en las fibras nerviosas y musculares resultando en la degeneracion del nervio axonal, perdida de miosina del musculo, hipoxia celular y necrosis muscular, lo que conduce a la inexcitabilidad electrica de nervios y musculos, con debilidad muscular reversible. El diagnostico se realiza mediante la clinica, estudios electrofisiologicos y biopsia muscular. El control metabolico y de factores de riesgo reducirian la gravedad de las complicaciones y la rehabilitacion temprana en la unidad podria acelerar la recuperacion funcional y la independencia de los pacientes... Critical illness polyneuropathy and myopathy are frequent complications in patients admitted to the ICU distinguished by generalized muscle weakness which hinders weaning from mechanical ventilation thus prolonging length of hospitalization and posing a higher risk of other complications. They cause chronic disability in survivors of critical illness due to functional and structural changes in nervous and muscular fibers resulting in axonal degeneration, loss of myosin filaments, cell hypoxia and muscle necrosis leading to nerve and muscle electrical inexcitability causing reversible muscle weakness. Clinical features and electrophysiologic testing or muscle biopsy are the gold standard for diagnosis. Controlling metabolic factors and risk factors could reduce serious complications and rehabilitation at an early stage of the ICU stay could improve functional recovery and patient independence...
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Enciso et al. (2013) studied this question.
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