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

The typical duration of a hemodialysis session is usually between 3 to 5 hours. This length of time is necessary to adequately remove waste products and excess fluid from the blood of patients with kidney failure. During this session, blood is drawn from the patient, passed through a dialyzer (artificial kidney), and returned to the patient, allowing for proper filtration and cleaning of the bloodstream.

The length of the session is also influenced by the patient’s individual needs, the type of dialysis prescription they have, and their overall health status. Shorter sessions may not provide sufficient clearance of toxins, while excessive durations could lead to complications such as instability in blood pressure and dehydration.

Sessions that last 1-2 hours would generally be considered inadequate for most patients, while sessions extending to 5-7 hours or more might not be practical or safe, and 10 hours or more would be particularly uncommon and not suitable for conventional hemodialysis treatment schedules. Thus, the 3-5 hour range is the most widely accepted duration for effective hemodialysis sessions.