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The measure of how completely dialysis clears waste — tracked with Kt/V and URR to prevent underdialysis.
Adequacy targets: spKt/V ≥ 1.2 for HD (URR ≥ 65%), weekly Kt/V ≥ 1.7 for CAPD. Underdialysis causes uremia, malnutrition, and mortality. Factors reducing adequacy: access recirculation, shortened sessions, low blood flow, dialyzer clotting. Monthly adequacy testing drives prescription changes.
A dimensionless number used to quantify dialysis adequacy, where K = dialyzer clearance, t = treatment time, and V = volume of distribution of urea.
The percentage reduction in blood urea nitrogen (BUN) during a single hemodialysis session, used as a screening measure of dialysis adequacy.
A medical procedure that filters waste products, excess fluids, and toxins from the blood using a dialysis machine when the kidneys can no longer perform this function adequately.
Cleaned blood re-entering the arterial needle instead of returning to the body — a hidden cause of underdialysis.
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This content is a general reference, not medical advice, a diagnosis, or a treatment plan. Do not change your diet, fluids, medicines, or dialysis plan without your nephrologist or renal dietitian. Individual recommendations depend on your labs, medications, conditions, and care plan.