Randomized Study to Investigate the Safety and Performance of Diaphragm Stimulation Coupled With Mechanical Ventilation

Inclusion Criteria: * Patient is intubated, on mechanical ventilation, undergoing tracheostomy, and expected to undergo mechanical ventilation for at least 5 days * Signed written informed consent has been obtained prior to performing any study related procedure(s) * Subject is at least 18 years of age * Negative pregnancy test if the patient is a female of child-bearing potential. (Females of child-bearing potential exclude women who are post-hysterectomy or post-menopausal.) Exclusion Criteria: * Diaphragm malformation which makes electrode insertion impossible * Presence of an implantable cardioverter-defibrillator * Severe chronic obstructive pulmonary disease (COPD) * Subject is pregnant or breastfeeding * Diagnosis of neuromuscular disease or high level spinal cord injury prior to tracheostomy * Terminal patients expected to die during their stay in the hospital * Participation in other clinical studies that could interfere with the results in the ongoing study