A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 5/145 (2006.01) A61M 5/172 (2006.01) A61M 5/315 (2006.01) A61M 31/00 (2006.01) A61M 5/14 (2006.01)
Patent
CA 2216944
An angiographic injector (10), preferably in the form of a dual port syringe, has an upper port (78) for connection to a fluid reservoir (22) and a lower port (80) for delivery of the medical fluid under pressure to a patient. A first valve (28) is connected between the fluid reservoir (22) and the upper port (78), and a second valve (26) is connected between the lower port (80) and the patient. During a fill operation, a piston (20) is moved within the syringe (18) to draw fluid from the reservoir (22) into the syringe (18) through the first valve (28) and the upper port (78). The first valve (28) permits air to be expelled from the syringe (18) through the first valve (28) during a purge operation, but blocks flow of fluid the syringe (18) back to the fluid reservoir (22). During injection operation, the piston (20) moves in an opposite direction to force fluid out of the syringe (18) through the lower port (80).
L'invention porte sur un injecteur (10) pour angiographie présentant de préférence la forme d'une seringue à deux orifices et comportant un orifice supérieur (78) raccordé à un réservoir de fluide (22) et un orifice inférieur délivrant le fluide médical sous pression au patient. Une première soupape (28) est placée entre le réservoir (22) et l'orifice supérieur (78), et une seconde (26) est placée entre l'orifice inférieur (80) et le patient. Pour le remplissage, un piston (20) se déplace dans la seringue (18) pour faire passer le fluide du réservoir (22) dans la seringue (18) via la première soupape et l'orifice supérieur (78). Ladite première soupape (28) laisse sortir l'air de la seringue (18) lors d'une opération de purge, mais empêche le reflux du fluide de la seringue (18) vers le réservoir (22). Pour l'injection, le piston (20) se déplace en direction opposée pour expulser le fluide de la seringue (18) par l'orifice inférieur (80).
Liu Jiyan
Wilson Robert F.
Acist Medical Systems Inc.
Invasatec Inc.
Robic
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