Dialysis Technician Practice Exam 2026 - Free Dialysis Technician Practice Questions and Study Guide

A malfunctioning dialyzer can lead to a decreased blood flow rate, which is a significant indicator of potential issues. The dialyzer, also known as the artificial kidney, is responsible for filtering waste and excess fluid from the blood during dialysis. If the dialyzer becomes blocked or has insufficient function, it can impede the flow of blood through its fibers, resulting in a decreased blood flow rate. This can diminish the effectiveness of the dialysis treatment and may require immediate attention to ensure patient safety.

In contrast, increasing dialysis efficiency would generally suggest that the dialyzer is functioning well, as a properly working dialyzer should effectively remove toxins and fluids. A stable blood pressure is another indicator of a well-functioning dialysis session, as fluctuations in blood pressure may signal complications but not necessarily a malfunctioning dialyzer. Lastly, a high ultrafiltration rate could indicate that the dialyzer is removing fluid effectively, which would not typically suggest a malfunction. Thus, the correct choice highlights a key issue that can occur with a dialyzer that is not operating correctly.