<qa>  What is the long term efficacy of mechanical cough assistance devices in neuromuscular patients?Various techniques have been proposed to improve lung recruitment and cough in neuromuscular patients. The assisted techniques based on a positive pressure insufflation maneuver have shown an improvement in physiological variables on the short term, but there is to date no good-quality prospective study allowing to evaluate the long term efficacy of mechanical cough assistance devices in neuromuscular patients. 