CPB System With Fluid Volume Control

An extracorporeal blood circuit system (ECC) for use on a patient, comprising

• a venous cannula line having an inlet and an outlet;
• an oxygenator in fluid communication with the outlet of the venous cannula line, having an inlet for receiving oxygen deficient blood and an outlet for oxygenated blood;
• an arterial cannula line having an inlet in fluid communication with the outlet of the oxygenator and an outlet for delivering oxygenated blood;
• a pump having an inlet connected to the outlet of the venous cannula line and an outlet connected to an inlet line of the oxygenator, for inducing blood flow through the venous cannula line, oxygenator, and arterial cannula line;
• a closed bag blood reservoir of substantially transparent, bio-compatible material, having upper and lower ends, an infusion port and connector located at the upper end of the bag, an outlet port and connector located at the lower end of the bag, an inlet port and connector located at the lower end of the bag, and an IV port and connector located at the lower end of the bag;
• a reservoir inlet line between the outlet of the pump and the inlet port connector and a reservoir outlet line between the inlet of the pump and the outlet port connector;
• a split line connected to the infusion connector, having first and second branch lines;
• wherein the first branch line is connected to a source of volume makeup fluid into the reservoir and the second branch line is an air evacuation line from the reservoir.