一对相互啮合的齿轮和泵缸把吸入腔和排出腔隔开。
A pair meshes mutually the gear and the fluid cylinder and discharge the suction chamber the cavity to separate.
此外，由于不需要吸入阀和吸入腔室，因此整个结构被简化，成本降低。
Moreover, since no suction valves and suction Chambers are required, the structure is simplified and the cost is reduced.
目的探讨双向腔肺动脉吻合术（BCPS）术后肺血流灌注不足患儿吸入一氧化氮（NO）的疗效。
Objective To evaluate the therapeutic effect of nitric oxide(NO) inhalation on children with insufficient pulmonary perfusion after bidirectional cavopulmonary shunt(BCPS).
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