System for detecting air
AssigneeACIST Medical Systems, Inc.
InventorsDoug Duchon, Thomas Paulson, Vince Copa, Robert F. Wilson, Jiyan Liu
Life of this patent
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Abstract
A dual port syringe has an upper port for connection to a fluid reservoir and a lower port for delivery of the medical fluid under pressure to a patient. A first valve is connected between the fluid reservoir and the upper port, and second valve is connected between the lower port and the patient. During a fill operation, a piston is moved within the syringe to drawn fluid from the reservoir into the syringe through the upper port. During injection operation, the piston moves in an opposite direction to force fluid out of the syringe through the lower port.
Claims39
A device for delivering angiographic fluid to a patient comprising:
- an actuator assembly having an axially movable shaft;
- a syringe receptacle located adjacent said actuator assembly;
- a syringe insertable into said receptacle, said syringe having a plunger sized to engage said axially movable shaft, said syringe being maintained in a substantially horizontal orientation during use;
- and
- an air detector device determinative of a presence of a quantity of air harmful to said patient, said air detector device being disposed a short distance down-stream and above an exit of said syringe.
A device for delivering angiographic fluid to a patient comprising:
- an actuator assembly having an axially movable shaft;
- a syringe receptacle located adjacent said actuator assembly;
- a syringe insertable into said receptacle, said syringe having a plunger sized to engage said axially movable shaft, said syringe being maintained in a substantially horizontal position during use;
- an air detector device determinative of a presence of a quantity of air harmful to said patient, said air detector device being disposed proximal to and slightly above an exit end of said syringe;
- an angiographic fluid reservoir in fluid communication with said syringe;
- and
- a fluid sensor determinative of the availability of fluid in said reservoir, said fluid sensor being disposed along a pathway of fluid travel that extends from inside said reservoir into said syringe.
A method of injecting angiographic fluid into a patient comprising:
- providing an actuator assembly having an axially movable shaft;
- providing a syringe receptacle adjacent said actuator assembly;
- providing a syringe fillable with said angiographic fluid, said syringe having a plunger engagable with said movable shaft;
- mounting said syringe into said receptacle;
- ensuring said syringe is at least partially filed with angiographic fluid;
- urging said fluid out of said syringe toward said patient, and
- monitoring flow of fluid along a portion of a fluid pathway that is proximal to and slightly above an exit end of said syringe for harmful amounts of air.
A method of injecting angiographic fluid into a patient comprising:
- providing an actuator assembly having an axially movable shaft;
- providing a syringe receptacle adjacent said actuator assembly;
- providing a syringe having a plunger engagable with said movable shaft;
- providing an air detector device determinative of a presence of a quantity of air harmful to said patient, said air detector device being disposed proximal to a substantially horizontal syringe and slightly above an exit end of said syringe;
- providing a reservoir of angiographic fluid;
- mounting said syringe into said receptacle;
- filling said syringe with fluid from said reservoir so that said syringe is at least partially filled with angiographic fluid;
- monitoring the availability of fluid in said reservoir;
- and,
- urging said fluid out of said syringe toward said patient.
Dependencies are inferred from the claim text.