This is a study of two children, aged respectively 10 and 6 years, who sustained a spinal cord injury at the C1 C2, causing apnoea. After the bilateral implantation of diaphragm pacemakers and periods of conditioning, they were able to adapt to continuous and simultaneous full-time ventilatory support of both diaphragms without any sign of fatigue, for more than 24 and 11 months, respectively.