| 摘要 |
The apparatus (10) includes a cylinder (12) for containing a pressurized therapeutic oxygen gas, a nasal cannula (16), adapted to be introduced into a nasal passage of a patient, and a conduit (18) extending between the cylinder and the nasal cannula for directing the therapeutic oxygen gas to the nasal cannula from the cylinder. A pressure sensor (26) is provided on the conduit for detecting the pressure in the conduit. A valve (20) is provided, in the conduit, which allows and blocks the fluid communication between the cylinder and the nasal cannula. A controller (30) controls the operation of the valve in synchronization with the respiration of the patient, based on the changes in the pressure detected by the pressure sensor. The volume of the oxygen therapeutic gas passing through the valve for each respiration is increased, compared with a normal respiration condition, when the respiratory frequency increases. <IMAGE> |
