A medical fluid circuit comprising a low level detector 1

A - Human Necessities – 61 – M

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A61M 1/00 (2006.01) A61M 1/02 (2006.01) A61M 1/16 (2006.01) A61M 1/34 (2006.01) A61M 1/36 (2006.01) A61M 5/168 (2006.01)

Patent

CA 2723978

In an infusion circuit (1), a peristaltic pump (7) displaced the infusion fluid along a line (3), sourcing it from a batch container (2). When a weight sensor (5) detects an emptying of the batch container (2), the pump is halted. If on stopping the pump the pressure measured by a sensor (6) operating in an expansion chamber (4) does not drop in excess of a predetermined threshold with respect to a non-empty container (2), a non-secure situation is signalled, due to an excessive quantity of air in the expansion chamber.

Dans un circuit de perfusion (1), une pompe péristaltique (7) déplace le liquide de perfusion provenant d'un contenant d'alimentation en discontinu (2) le long d'un tuyau (3). Lorsqu'un capteur de poids (5) détecte que le contenant d'alimentation en discontinu (2) se vide, la pompe s'arrête. Si lors de l'arrêt de la pompe, la pression mesurée par un capteur (6) fonctionnant dans une chambre d'expansion (4) ne baisse pas en-deçà d'un seuil prédéterminé par rapport à un contenant non vide (2), une situation de non sécurité, due à une quantité excessive d'air dans la chambre d'expansion, est signalée.

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