Malinauskas RA - While postpump obstructions and hemolysis can occur without causing noticeable changes to the prepump arterial and venous blood line pressures, recognizing sudden and/or sustained decreases in the circuit pressures during treatment may help to prevent adverse patient events. This analysis reinforces the importance of regularly checking the blood tubing set for kinks and for monitoring the circuit pressures for atypical trends within and between treatments.