A control system for automatic electrical stimulation of abdominal muscles to assist respiratory function in tetraplegia

This letter refers to a paper published by Gollee et al. [Gollee H, Hunt KJ, Allan DB, Fraser MH, McLean AN. A control system for automatic electrical stimulation of abdominal muscles to assist respiratory function in tetraplegia. Med Eng Phys 2007;29:799–807]. We address here the consequences of continuous use and suggest a refinement that may improve the cough peak flow under more chronic conditions.