Technical note: Ventilator modified as an anesthesia delivery system

It would be useful to have a ventilator that could be used with all types of patients, from neonates through adults, both for anesthesia and long term ventilation. This paper describes the modification of a Siemens 900C ventilator for this purpose. In the operating room, this machine can be used in conjunction with a complete anesthesia machine. This paper describes the changes made in this system to make it capable of delivering anesthetics as a single unit.