free water reabsorption level to body weight ratio
glomerular filtration rate +
glomerular sieving coefficient for albumin
This is a calculated measurement of the ability of the kidney glomerulus to keep albumin out of the urine by its filtering function. It is the ratio of the albumin concentration in the filtrate (in Bowmans space) to the albumin concentration in the plasma (in the glomerular capillaries). The equation to derive this sieving value is based on fluorescence values from intravital multiphoton microscopy: (intensity of Bowmans space intensity of background Bowmans space)/(intensity of capillaries intensity of background capillaries).
proximal tubule albumin uptake to tubule area ratio