Hydraulic and oncotic pressures along an idealized glomerular capillary and within Bowman’s space. Hydraulic and oncotic pressures along an idealized glomerular capillary and within Bowman’s space. The graph shows idealized hydraulic and oncotic pressure curves under conditions of filtration pressure equilibrium (curve A) when the mean net ultrafiltration pressure is equal to the shaded region between the and the curves. Curve B is a hypothetical linear profile of the oncotic pressure that would occur with a minimum value of the Kf. By contrast, in curve C, filtration equilibrium is never reached. Modified from Taal MW, Chertow GM, Marsden PA, Skorecki K, Yu ASL, Brenner BM: Brenner and Rector's The Kidney, 9th Ed., Philadelphia, Elsevier Saunders, 2012, with permission. Martin R. Pollak et al. CJASN 2014;9:1461-1469 ©2014 by American Society of Nephrology