During priming with saline, run the pump at how many mL/min?

• A. 100 mL/min
• B. 150 mL/min
• C. 200 mL/min
• D. 250 mL/min

Answer: (B)

Priming the extracorporeal circuit with saline should be done at a brisk, steady flow that clears air quickly without stressing the system. Setting the pump to 150 mL/min achieves that balance: it pushes saline through all lines efficiently, pushes out air, and fills the circuit promptly, which helps the air detector stay free of bubbles. If the rate is too low, air can linger and require re-priming; if it’s too high, you may risk triggering alarms or creating turbulence in the lines. Once the lines are filled with saline and no air is detected, you can proceed with the setup.