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
UOP urinary output
UPT uptake
URI upper respiratory infection
URQ upper right quadrant
US ultrasound
UTI urinary tract infection
UUN urinary urea nitrogen
UVA ultraviolet A light