What is the correct protocol for drawing a post BUN lab sample during dialysis?

The correct protocol for drawing a post BUN lab sample during dialysis involves turning off the ultrafiltration rate (UFR) before drawing the blood. This step is critical because turning off the UFR allows the blood to stabilize and ensures that the sample accurately reflects the patient's blood urea nitrogen level after undergoing dialysis treatment. If the UFR is left running, it could potentially alter blood flow and composition in the dialyzer, leading to inaccurate lab results.

This ensures that the sample taken is representative of the patient's status at the end of the dialysis session and helps in assessing the effectiveness of the treatment. When blood is drawn under stable conditions, it provides valid data for evaluating the patient's need for adjustments in dialysis treatment.