Multi-chamber syringe

A medication delivery system, comprising:

• a syringe, comprising:
• a syringe body defining a syringe cavity and a syringe port, wherein the syringe port is in fluid communication with the syringe cavity;
• a first plunger disposed within the syringe cavity and defining a first chamber in the syringe cavity, wherein the first chamber is in fluid communication with the syringe port, the first plunger comprising:
• a first plunger channel extending through the first plunger;
• a first plunger shaft extending from the first plunger, the first plunger shaft defining a first plunger shaft lumen, wherein the first plunger shaft lumen is in fluid communication with the first plunger channel;
• a second plunger disposed within the syringe cavity, the first plunger and the second plunger cooperatively defining a second chamber in the syringe cavity, the second plunger comprising:
• a second plunger shaft extending from the second plunger, the second plunger shaft defining a second shaft channel, the second shaft channel receiving at least a portion of the first plunger shaft;
• and
• an inner tube comprising an inner tube lumen, the inner tube extending from the syringe port into the first plunger shaft lumen, wherein the inner tube and the first plunger shaft lumen define an annulus therebetween, the annulus in fluid communication with the first plunger channel and the annulus permits fluid communication between the syringe port and the first plunger channel;
• and
• a tubing defining a first flow path and a second flow path, wherein the first flow path is separated from the second flow path by a tubing wall, the first flow path is in fluid communication with the first chamber, and the second flow path is in fluid communication with the annulus.

A method to deliver medication, the method comprising:

• receiving saline from a return flow path of a tubing in an inner tube of a syringe;
• directing saline from the inner tube to an annulus of the syringe, wherein the inner tube and a medication plunger shaft lumen define the annulus therebetween;
• and
• directing saline from the annulus to a saline chamber of the syringe.