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A simplified Kt/V calculation that models the body as a single urea compartment without accounting for urea rebound after dialysis, commonly used for routine adequacy monitoring.
Single-pool Kt/V (spKt/V) assumes urea is distributed in a single, well-mixed compartment. The Daugirdas formula (2nd generation) is the most widely used: spKt/V = -ln(R - 0.008 × t) + (4 - 3.5 × R) × UF/W, where R = post-BUN/pre-BUN, t = session time in hours, UF = ultrafiltration volume in liters, and W = post-dialysis weight in kg. Minimum target is 1.2 per session. The simplified calculation makes spKt/V practical for routine monthly monitoring. However, it overestimates true dialysis dose because it ignores urea rebound — the post-dialysis rise in BUN as urea redistributes from poorly dialyzed compartments (muscle, bone) into the bloodstream.
A dimensionless number used to quantify dialysis adequacy, where K = dialyzer clearance, t = treatment time, and V = volume of distribution of urea.
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.
The percentage reduction in blood urea nitrogen (BUN) during a single hemodialysis session, used as a screening measure of dialysis adequacy.
The assessment of whether dialysis treatment provides sufficient clearance of waste products and fluid removal to maintain patient health and quality of life, measured primarily by Kt/V and clinical outcomes.
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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.