Certified Hemodialysis Technician Practice Exam 2025 – All-in-One Guide to Exam Success

The ultrafiltration coefficient is a critical dialyzer characteristic that indicates how efficiently water can be removed from the blood during hemodialysis. It reflects the dialyzer's capacity to allow water to pass through its membrane based on the pressure applied to the system and the concentration of solutes in the blood.

This coefficient is essential for determining the rate of ultrafiltration, which is the process by which excess water is removed from the blood. A higher ultrafiltration coefficient means that the dialyzer will be more effective at removing water, leading to a better management of fluid levels during dialysis treatment.

The other choices relate to different aspects of dialyzer function; clearance pertains to solute removal, filtration rate relates to the speed of blood flow through the dialyzer, and permeability deals with the ability of the membrane to allow certain substances to pass. However, it is the ultrafiltration coefficient that specifically addresses the removal of water during treatment.