| 摘要 |
A first cannula assembly includes a cannula attachable to a patient to extend along and at least partially cover one side of the patient's face and leave completely exposed the other side of the patient's face. A second cannula assembly includes a reusable unit and a disposable and replaceable loop-shaped mouthpiece. The reusable unit contains a suction pump having a flow inlet and a flow outlet, a power source operatively connected to the suction pump, a carbon dioxide sensor in fluid communication with the flow outlet, and a microprocessor adapted to use at least the carbon dioxide sensor to calculate a carbon dioxide level. The mouthpiece has first and second ends, wherein the first end is directly attached to the reusable unit and the second end is positionable in a patient's mouth. The mouthpiece includes at least one respiratory-gas-sampling port in fluid communication with the flow inlet of the pump. |
