Kt/V for Dialysis Adequacy
Measures adequacy of haemodialysis. Kt/V represents clearance (K) × time (t) / volume of distribution (V). Target: single-pool Kt/V ≥1.4 (KDOQI) or URR ≥65%.
Score interpretation
Kt/V <1.2 — inadequate dialysis; associated with increased morbidity and mortality
→ Increase dialysis time or frequency; check vascular access flow; review blood flow rate; consider increasing Qb or Qd; dietitian review
Kt/V 1.2–1.4 — borderline adequacy (minimum acceptable threshold)
→ Aim for higher Kt/V; consider extending session time; review access function
Kt/V ≥1.4 — adequate haemodialysis per KDOQI guidelines
→ Maintain current prescription; monitor monthly URR and Kt/V; nutritional monitoring
Interpretation bands for the Kt/V. Apply clinical judgement and local guidance.
References
- Daugirdas JT. Second generation logarithmic estimates of single-pool variable volume Kt/V: an analysis of error. J Am Soc Nephrol. 1993;4(5):1205–1213.
Related
Curated clinical cross-links plus same-class fallbacks.
- Hyperkalaemia Management · UK Kidney Association Guidelines 2020; NICE CKD Guidelines
- Rhabdomyolysis · Renal Association 2018; UpToDate 2024
- Hypocalcaemia (Adult) · Society for Endocrinology
- SIADH (Endocrine Perspective) · European Hyponatraemia Guidelines 2014
- Hepatorenal Syndrome · EASL 2018; ICA 2015
- Acute Kidney Injury (AKI) · KDIGO 2012 / NICE AKI 2019
Decision support only — verify against a current formulary, NICE, or your local guideline before clinical use.