Medical abbreviations : ' U '
Abbreviation | Interpretation |
| UA | urinalysis |
| UAC | uric acid | umbilical artery catheter |
| UAO | upper airway obstruction |
| UBD | universal blood donor |
| UC | ulcerative colitis | umbilical cord |
| ud | as directed |
| UFH | unfractionated heparin |
| UGI | upper gastrointestinal |
| URI | upper respiratory infection |
| URQ | upper right quadrant |
| US | ultrasound |
| UTI | urinary tract infection |
| UUN | urinary urea nitrogen |
| UVA | ultraviolet A light |
