The Clinical Measurement Ontology (CMO), Measurement Methods Ontology (MMO), and Experimental Condition Ontology (XCO) are currently being developed at the Rat Genome Database. For more information about these vocabularies please see Shimoyama et al. Three ontologies to define phenotype measurement data. Front Genet. 2012;3:87. Epub 2012 May 28 or contact us (http://rgd.mcw.edu/contact/index.shtml).
Measurement of average carotid artery blood flow velocity, the speed with which blood moves along the circulation in any particular segment of carotid artery. Blood flow velocity is related directly to blood flow and inversely to cross-sectional area. Blood flow velocity can be measured indirectly by Doppler ultrasound