calculated kidney glomerulus measurement glomerular filtering surface area to glomerular volume ratio 2021-05-11T14:27:01Z CMO:0003709 PMID:7894005 Spcw This is a calculated value estimated from the glomerular filtering surface area of the peripheral capillary wall per unit glomerular volume. It is based on the proportion of the peripheral capillary basement membrane in contact with epithelial podocytes, as determined by microscopic measurements. VT:0005325 clinical_measurement_ontology ratio of glomerular filtering surface area to glomerular volume slaulede surface density of the filtering surface area