Certified Hemodialysis Technician Practice Exam 2025 - Free Hemodialysis Technician Practice Questions and Study Guide

Question: 1 / 400

What is the purpose of counter-current flow in dialysis?

To improve blood flow to the dialyzer

To increase the rate of waste removal

The purpose of counter-current flow in dialysis is to increase the rate of waste removal. In this process, the blood and dialysate flow in opposite directions within the dialyzer. This configuration maximizes the concentration gradient between the two fluids. As a result, waste products such as urea and creatinine in the blood diffuse into the dialysate more efficiently.

By flowing in opposite directions, the dialysate in contact with the blood becomes increasingly depleted of waste materials, allowing for more effective removal of toxins from the patient's blood. This mechanism enhances the overall dialysis efficiency, ensuring that patients receive optimal treatment and maintain better health outcomes. Other choices related to blood flow, patient comfort, or treatment time do not address the primary function of counter-current flow, which fundamentally revolves around increasing the effectiveness of waste removal.

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To enhance patient comfort

To reduce treatment time

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