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Medical Abbreviations – U



U units
UA urine analysis
unstable angina
uric acid
upper airways
upper arm
UAC umbilical artery catheter
UAD use as directed
upper airway disease
UAE urinary albumin excretion
UAL ultrasound-assisted lipoplasty
 umbilical artery line
UAO upper airway obstruction
UAP unstable angina pectoris
 upper abdominal pain
UARS upper airway resistance syndrome
UAS umbilical arteries
UBC urinary bladder cancer
unilateral breast cancer
UBD Urinary bladder distension
universal blood donor
UBE upper body exercise
UBF uterine blood flow
UBI ultraviolet blood irradiation
UBO upper body obesity
UBT Urea Breath Test
uterine balloon therapy
UBW usual body weight
UC ulcerative colitis
uterine contractions
urinary catheter
urea clearance
umbilical cord
urine culture
UCAD unstable coronary artery disease
UCB umbilical cord blood
UCD underlying cause of death
UCF unexplained chronic fatigue - encompasses both chronic fatigue
syndrome (CFS) and idiopathic chronic fatigue (ICF)
UCG urinary chorionic gonadotropin
UCHD usual childhood diseases
UCI unusual childhood illness
 urethral / urinary catheter in
UCLP unilateral cleft lip and palate
UCO urethral catheter out
umbilical cord occlusion
UCR urinary creatinine
Usual, Customary and Reasonable
UCS uterine compression syndrome
UCTD undifferentiated connective tissue disease
UCVA uncorrected visual acuity
UCX urine culture
UD urethral discharge
ulcerative dermatosis
use as directed
usual diet
under developed
urethral dilatation
ulnar deviation
UDC usual diseases of childhood
UDN ulcerative dermal necrosis
UDS urine drug screen
ultrasound Doppler sonography
UDT undescended testicles
UE unknown etiology
under elbow
upper extremity
upper esophagus
UEC uterine endometrial carcinoma
UES upper esophageal sphincter
UF ultrafiltration
unbound fraction
UFC urinary free cortisol
UFF ultrafiltration failure
UFH unfractionated heparin
UFN until further notice
UFO Until Further Order(s)
UFR ultrafiltration rate
UFV ultrafiltration volume
UG until gone
upward gaze
UGA under general anesthesia
UGB upper gastrointestinal bleeding
UGCR ultrasound-guided compression repair
UGH uveitis, glaucoma, and hyphema
urinary growth hormone
UGI upper gastrointestinal , upper gastrointestinal bleeding, upper
gastrointestinal series
UGP urinary gonadotropin peptide
UH umbilical hernia
upper half
UI urinary incontinence
urinary infection
UIQ upper inner quadrant
UJ ulcerative jejunitis
UK unknown
UKR unicompartmental knee replacement
UL upper lobe
upper limb(s)
upper lid
ULET Uniform Life-Expectancy Table
ULLE upper lid - left eye
ULN upper limits of  normal
ULQ upper left quadrant
ULRE upper lid - right eye
ULTT Upper Limb Tension Test
UM uracil mustard
utilization management
UMN upper motor neuron
UN urea nitrogen
unilateral nephrectomy
UNA urinary sodium
UNC Uncertain, unconscious, uncooperative
UNE urinary norepinephrine
UNG ointment
UNK uterine NK
UNL upper normal limit
UNS unsymmetrical
UO urine output
undetermined origin
UOP urine output
UOQ upper outer quadrant
UOSM urinary osmolality
UP ulcerative proctitis
ulcerated plaque
upright posture
UPC unknown primary carcinoma
UPD update
uniparental disomy
UPJ ureteropelvic junction
UPP urethral pressure profile
UPSC uterine papillary serous carcinoma
UPT unknown primary tumor
urinary pregnancy test
UR upper respiratory
utilization review
urinary retention
upper right
URA unilateral renal agenesis
URAS unilateral renal artery stenosis
URD Upper respiratory disease
URG urgent
URI upper respiratory tract infection
URL upper rate/reference limit
URO urology
UROB urobilinogen
URQ upper right quadrant
URR urea reduction ratio/rate
URS ultrasonic renal scanning
unconditioned responses
URT upper respiratory tract
US ultrasound
unconditioned stimuli
USA unstable angina
USB upper sternal border
USC uterine serous carcinoma
usual source of care
USG urine specific gravity
USH usual state of health
USI urinary stress incontinence
USL ultrasonic lithotripsy
USN ultrasonic nebulizer
USO unilateral salpingo-oophorectomy
UT urinary tract
UTA uterine artery
urinary tract anomaly
UTC Ultrasonic tissue characterization
undifferentiated thyroid carcinoma
UTD up to date
unable to determine
UTF urinary tissue factor
UTI urinary tract infection
UTO urinary tract obstruction
unable to obtain
UTP Urinary total protein
UTR untranslated region - Regions of mature RNA that do not code for
UTS ulnar tunnel syndrome
unable to see
UUI urge urinary incontinence
UUN urinary urea nitrogen
UUTI uncomplicated urinary tract infections
UV umbilical vein
ultraviolet (radiation)
urine volume
UVA ultraviolet A light / irradiation
UVB ultraviolet B light / irradiation
UVC umbilical venous catheter
ultraviolet C
UVEB unifocal ventricular ectopic beat
UVGI ultraviolet germicidal irradiation
UVJ ureterovesical junction
UVL ultraviolet light /  ultra violet lithography
umbilical venous line
UVR ultraviolet radiation
UW unilateral weakness
UWB unit of whole blood 
UXO unexploded ordnance
Medical Abbreviations – U