| 摘要 |
An apparatus (11) configured to provide positive airway pressure in a respiratory circuit comprises a container (12) configured to be filled to a preselected level with liquids (31); a drop tube assembly(30, 22) comprising a hollow gas tube (30) rotatably mounted in said container having an upper end extending a static distance outwardly of the container and connected to a respiratory circuit downstream of a user, and a hollow drop tube (22) reciprocally movable upwardly and downwardly in the liquid in response to rotational movement of the gas tube. The container is provided with a gas vent (15) and a liquid fill port (13).
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