Abbreviation Meaning UOSM urine osmolalityUA urinalysis unstable anginaU/Aupon arrival UAE Uterine Artery Embolization (synonym for Uterine Fibroid Embolization) UBT urea breath test UC ulcerative colitis uterine contraction UCHD usual childhood diseases (see list of childhood diseases) UCTD Undifferentiated connective tissue disease UCx Urine culture UD as directed (from Latin ut dictum) UDS undifferentiated sarcomaurine drug screening urodynamic study UDT urine drug test undescended testis UE upper extremity U&E urea and electrolytes (blood test) (for sodium and potassium, and often creatinine) UFE Uterine Fibroid Embolization UIP usual interstitial pneumonitis UGI upper gastrointestinal ULN upper limit of normal UMN upper motor neuron UNOS United Network for Organ Sharing UOP, UO, U/O urinary output Ung, ungt ointment (from Latin unguentum) Unk unknown UPJ ureteropelvic junction (see pyeloplasty) UPO until proven otherwise UPT urine pregnancy test URA unilateral renal agenesis URI upper respiratory infection URS Ureteroscopy URTI upper respiratory tract infection US ultrasonogram USA unstable angina USG ultrasonogram USO unilateral salpingo-oophorectomy USOH usual state of health USP United States Pharmacopeia USR unheated serum reagin USS ultrasound scan UTI urinary tract infection UUS upper uterine segment UVAL ultraviolet argon laser
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