| 摘要 |
<p>A liquid delivery pumping device (10) for the delivery of liquids enterally or parenterally comprises a housing (11) including a gas generating chamber (17), wherein a gas is generated intermittently when two reactants, such as the components of an effervescent couple, are caused to react, a pumping chamber (16) for a reciprocating pumping unit (15) operable by the gas and to which chamber (16) the gas is conveyed once generated, the pumping unit (15) forming part of a mechanism which receives and regulates the liquid to be delivered in response to the reciprocation of the pumping unit (15), and means (29-37) for controlling the gas pressure within the pumping chamber (16) to enable controlled reciprocation of the pumping unit. The device (10) provides precisely controlled rates of liquid delivery to a patient irrespective of the viscosity of the liquid to be delivered.</p> |
