Tertiary care for critically ill children requires a safe, efficient transport modality designed for the pediatric patient. This system should be capable of delivering mobile intensive care en route after resuscitation and stabilization at the sending hospital.In July 1979, a Pediatric Emergency Transport Service (PETS) was organized at The Children's Hospital, Denver, to provide physicians of the Rocky Mountain-Plains Region with the capability of triaging pediatric nonneonatal patients to three Denver Pediatric Intensive Care Units (PICU's). The components of the system included: (1) a transport team comprising of a medical attending-director, twelve transport physicians including nine pediatricians, two anesthesiologists and one surgeon, six pediatric transport nurses, six pediatric transport respiratory therapists, and four emergency medical technicians; (2) a communication dispatch system; (3) an answering service with Wide Area Telecommunications Service capability; (4) an equipment depot within the PICU at The Children's Hospital; (5) a complete dispatch log; (6) a continuing education and information system for the team, providers, consumers and health planners; (7) a cost and administrative center with established billing procedures and support services; (8| management, drug and equipment protocols, and (9) specifically designed air and ground ambulances which are owned and/or leased by The Children's Hospital.