| CAO | chronic airway obstruction; coronary artery obstruction |
|---|---|
| SAO | small airway obstruction; splanchnic artery occlusion; subvalvular aortic obstruction |
| UV | ultraviolet; umbilical vein; ureterovesical; Uppsala virus; urinary volume |
| UVA | ureterovesical angle |
| UVJ | ureterovesical junction |