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Table 1 Multidimensional characteristics of the membranes

From: Nomenclature for renal replacement therapy in acute kidney injury: basic principles

Multidimensional characteristic Symbol Formula
Surface area A A = 2 N f L π r i
Filter priming volume V b F V b F = N f L π r i 2
Total priming volume V b TOT V b TOT = V b F V b TOT + volume of tubes
Membrane porosity ρ ρ = N p π r p 2
  1. L membrane length, N f Number of fibers in the filter, N p number of pores in the filter, r i mean inner radius of the fibers, r p mean inner radius of the pores