SNOMED CT(Systemized Nomenclature of Medicine,Clinical Terms,US)organized the west medicine clinical terms into 19 related hierarchies with the instruction of its special classification methodology.

• 系统化临床医学术语集,美国)依据特定的术语分类原则,将现代临床医学术语划分成为19个具有内在有机关联的层级体系。