Upstream occlusion detection system

Details Upstream occlusion detection system Upstream occlusion detection system

A - Human Necessities

61

M

A61M 5/168 (2006.01)

Patent

CA 2230844

A pumping segment of a fluid line alternately in fluid communication with the upstream and downstream portions of the fluid line connects a fluid supply to a fluid receiver. A pressure sensor located downstream of the segment monitors the pressure during the segment's communication with the upstream and downstream ends. The pressure difference is used to establish a pressure threshold against which the average pressure is compared to determine if an upstream occlusion exists. Should the average pressure fall within a cautionary zone, the pump is reversed to examine the pressure difference once again. Based on the pressure difference during thre reversal, a pressure threshold line may be adjusted thereby adapting to fluid administration conditions.

Un segment de pompage d'une ligne de fluide communiquant en alternance avec les parties d'amont et d'aval de la ligne de fluide relie une alimentation de fluide à un récepteur de fluide. Un capteur de pression situé en aval du segment mesure la pression pendant que le segment est en communication avec les extrémités amont et aval. On utilise la différence de pression pour fixer un seuil de pression auquel on compare la pression moyenne en vue de déterminer s'il existe une occlusion en amont. Dans le cas où la pression moyenne descend jusqu'à une zone d'alerte, la pompe est inversée, ce qui permet d'étudier à nouveau la différence de pression. A partir de la différence de pression observée pendant l'inversion, on peut déterminer un seuil qui sera adapté aux conditions d'administration du fluide.

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