Abdominal Functional Electrical Stimulation to Reduce Hyperinflation in Chronic Obstructive Pulmonary Disease Patients

"Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.~Stimulation is applied at low stimulation current for the first half of exhalation"

"Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.~Stimulation is applied at low stimulation current for the second half of exhalation"

"Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.~Stimulation is applied at low stimulation current throughout exhalation"

"Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.~Stimulation is applied at medium stimulation current for the first half of exhalation"

"Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.~Stimulation is applied at medium stimulation current for the second half of exhalation"

"Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.~Stimulation is applied at medium stimulation current throughout exhalation"

"Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.~Stimulation is applied at high stimulation current for the first half of exhalation"

"Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.~Stimulation is applied at hig stimulation current for the second half of exhalation"

"Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.~Stimulation is applied at high stimulation current throughout exhalation"