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Year : 2021  |  Volume : 31  |  Issue : 2  |  Page : 97-110

The nitty-gritties of Kt/Vurea calculations in hemodialysis and peritoneal dialysis


1 Associate Medical Director, Medical Science and Strategy (Asia), IQVIA, Bengaluru, Karnataka, India
2 Consultant Nephrologist, Transplant Physician, Head of Department, Columbia Asia Hospital – Sarjapur Road, Ambalipura, Bengaluru, Karnataka, India; Faculty, Weill Cornell Medical College, New York, NY, USA

Correspondence Address:
Dr. Brian Mark Churchill
33, MIMS Ardendale, Phase 2, Near Adarsh Serinity, Kannamangala, Kadugodi Road, Whitefield, Bengaluru - 560 067, Karnataka
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijn.IJN_245_19

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In advanced Chronic Kidney Disease, patients require renal replacement therapy (dialysis or transplantation) for clearance of toxins, electrolyte and acid-base balance and removal of excess fluid. Dialysis adequacy should be taken into consideration in the adjustment of the dialysis prescription. Kt/Vurea is one method of measuring dialysis adequacy that is commonly used in clinical practice. Different formulae for calculating Kt/V are available. The appropriate Kt/V formula to be used depends on the clinical scenario, as well as parameters such as gender and size of patient, frequency of dialysis, mode of dialysis (ie hemodialysis vs, peritoneal dialysis), inter-dialysis weight gain, clinical symptoms, complications (fluid overload, hyperkalemia, intolerance to dialysis, etc), and residual kidney function. Nutrition parameters including serum protein and albumin levels, vitamin B12 and β2-microglobulin levels should be factored into the assessment of dialysis adequacy. In this review, we have described how Kt/Vurea is calculated in hemodialysis and peritoneal dialysis with examples. We reviewed the available literature by searching for papers related to calculating Kt/Vurea, single pool Kt/V, double pool Kt/V, weekly Kt/V, standard Kt/V, surface area normalized Kt/V, and various equations commonly practiced in clinical practice. We found several original articles, some review articles along with detailed information from manufacturers of different dialyzers published on their websites or as package inserts. Understanding the different equations available for calculating Kt/Vurea and the application of these results in the clinical setting is important for refining patient care and for designing clinical studies.






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Indian Journal of Nephrology
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