| 摘要 |
<p>The volumetric pumping system with automatic and controlled dosing of the liquids used for venous and/or arterial infusions comprises a pump body inside which is placed the principal body of a discardable element comprising a membrane made of natural rubber or latex with a high distension capacity, characterised in that, essentially, the pumping unit comprises a membrane plate (14) and a gate (12) with its closure and alarm means, which hold the principal body of the discardable element, of which the membrane is capable of distension by hydrostatic pressure towards the outside to a degree determined by a seat provided in the membrane plate of the pump, and in that the bottom of this seat has at its base a bellows device where the air is compressed in order to push the liquid lodged inside the elastic membrane towards the discardable part, while at the same time controlling the filling and emptying operations with valve elements placed at the inlet and outlet, and controlled by the pump, in such a way that the chamber fills by means of hydrostatic pressure, when the inlet is open and the outlet closed, the outlet closing until a sufficient pressure is reached, then opening to allow the liquid to flow at the required pressure towards the patient. <IMAGE></p> |
