Kt/V Calculator
Calculate dialysis adequacy using Daugirdas formula
Medical Disclaimer
This calculator is for educational purposes only. Always consult a healthcare professional for medical advice and dialysis management.
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Daugirdas Kt/V Calculation
About Kt/V
Kt/V is a measure of dialysis adequacy that quantifies the amount of urea removed during dialysis.
Daugirdas Formula:
Kt/V = -ln(R - 0.008 × t) + (4 - 3.5 × R) × UF/W
Where:
- • R = PostBUN/PreBUN
- • t = Dialysis time (hours)
- • UF = Ultrafiltration (weight loss)
- • W = Post-dialysis weight
Kt/V Targets:
- ≥1.2: Adequate dialysis
- 1.0-1.19: Borderline adequate
- <1.0: Inadequate dialysis
URR Targets:
- ≥65%: Adequate clearance
- 60-64%: Borderline adequate
- <60%: Inadequate clearance
Clinical Significance:
- • Predicts patient survival
- • Guides dialysis prescription
- • Monitors treatment quality
- • Identifies under-dialysis
Limitations:
- • Single-pool model
- • Doesn't account for residual renal function
- • May overestimate adequacy in some patients
- • Requires accurate blood sampling
Professional Resources:
- • Nephrologist
- • Dialysis nurse
- • Renal dietitian
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