This THR-820 Anesthesia Machine is equipped with an accurate dedicated anaesthetic vaporizer and a safety device for preventing cyanosis and necessary alarm system. During the anesthesia, the patient's respiratory functions can be managed by using a microcomputer controlled pneumatic electrically controlled synchronizing anesthesia respirator. Each connection part of the whole machine is a standard interface. A highly efficient and large volume soda lime absorber can minimize the re-inhalation of carbon dioxide by the patient.