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.
Claims11
A syringe for use in a medical fluid delivery device of a type having a syringe holder;
- the syringe comprising:
- (a) a syringe body having a distal end and a proximal end;
- the syringe body defining a pumping chamber and an inlet port;
- (b) a syringe end wall located at the distal end of said syringe body having a flat face for mating engagement with the syringe holder;
- said end wall defining an outlet port, an interior portion and an exterior portion;
- said exterior portion defining said flat face;
- (c) said exterior portion being reinforced with a plurality of ribs;
- the ribs each having end portions terminating in a plane transverse to a longitudinal axis of the syringe body;
- said end portions of said ribs defining said flat face;
- and
- (d) a syringe plunger located in said pumping chamber adapted for reciprocal motion between a position proximate to said proximal end and said distal end.
A syringe for use in a medical fluid delivery device of a type having a syringe holder;
- the syringe comprising:
- (a) a syringe body having a distal end and a proximal end;
- the syringe body defining a pumping chamber, a top portion and an inlet port;
- said inlet port being located in said top portion;
- (b) a syringe end wall located at the distal end of said syringe body having a flat face for mating engagement with the syringe holder;
- said end wall defining an outlet port;
- and
- (c) a syringe plunger located in said pumping chamber adapted for reciprocal motion between a position proximate to said proximal end and said distal end.
Dependencies are inferred from the claim text.