Extracorporeal blood circuit reservoir with angled venous inlet luer port

An extracorporeal blood circuit comprising:

• a venous cannula for cannulation to a patient and receiving venous blood;
• a reservoir device including:
• a housing defining a main chamber,
• an exit port fluidly connected to the main chamber,
• a venous inlet sub-assembly mounted to the housing and including:
• a downtube forming a primary lumen extending between an opening at opposing inlet and outlet ends, the downtube defining an inlet section adjacent the inlet end and an outlet section adjacent the outlet end,
• a luer port connector body extending from the inlet section and forming a passageway open to the primary lumen,
• a venous filter maintained within the housing fluidly between the outlet end and the exit port;
• wherein the venous cannula is fluidly connected to the inlet end of the downtube;
• an arterial filter device including a purge port, wherein the arterial filter device is fluidly connected to the exit port downstream of the reservoir device, and further wherein the purge port is fluidly connected to the port connector body;
• and
• an arterial cannula for cannulation to a patient downstream of the arterial filter;
• wherein a primary venous flow path is established from the venous cannula and through the downtube, and a secondary flow path is established from the purge port and through the first port connector body, and further wherein the secondary flow path merges with the primary venous flow path within the inlet section at an angle less than 90°.

A method of collecting and treating extracorporeal blood of a patient during surgical procedure, the method comprising:

• directing venous source blood from the patient into an inlet end of a downtube having an outlet end;
• directing secondary source blood into the downtube via a luer port connector body at a location upstream of the outlet end, including the secondary source blood flow merging with the venous source blood flow at an angle of less than 90°;
• dispensing a combination of the venous source blood and the secondary source blood from the outlet end into a reservoir chamber;
• and
• guiding the combination blood through a venous filter within the chamber.