calculated kidney glomerulus measurement glomerular filtering surface area to glomerular volume ratio clinical_measurement_ontology PMID:7894005 CMO:0003709 2021-05-11T14:27:01Z 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. surface density of the filtering surface area slaulede Spcw ratio of glomerular filtering surface area to glomerular volume VT:0005325