Dictionary of Medical Acronyms & Abbreviations

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[ U ]

U₁ | U₂ |

U congenital limb absence; in electrocardiography, an undulating deflection that follows the T wave; internal energy; International Unit of enzyme activity; Mann-Whitney rank sum statistic; potential difference (in volts); ulcer; ulna; ultralente [insulin]; umbilicus; uncertain; unerupted; unit [JCAHO unapproved abbreviation]; universal application [residency]; unknown; unsharpness; upper; uracil; uranium; urea; urethra; uridine; uridylic acid; urinary concentration; urine; urology; uterus; uvula; volume velocity
U/2 upper half
U/3 upper third
u unified atomic mass unit; velocity
Υ see upsilon
υ see upsilon
UA absorption unsharpness; ultra-audible; ultrasonic arteriography; umbilical artery; unauthorized absence; unicystic ameloblastoma; unit of analysis; unstable angina; upper airways; upper arm; uric acid; uridylic acid; urinalysis; urinary aldosterone; uronic acid; uterine activity; uterine aspiration
U/A uric acid; urinalysis
ua urinalysis
UAC umbilical artery catheter; unusual-appearing child
UA/C uric acid/creatinine [ratio]
UAE unilateral absence of excretion; urine albumin excretion
UAEM University Association for Emergency Medicine
UAGA Uniform Anatomical Gift Act
UAI uterine activity interval
UAI-C unprotected anal intercourse with casual partners
UAL ultrasound-assisted liposuction
U-AMY urinary amylase
UAN uric acid nitrogen
UAO upper airway obstruction
UAP unlicensed assistive personnel; unstable angina pectoris; urinary acid phosphatase; urinary alkaline phosphatase
UAPA unilateral absence of pulmonary artery
UAR upper airway resistance; uric acid riboside
UAS upper abdomen surgery; upstream activating sequence; upstream activation site
UAU uterine activity unit
UB ultimobranchial body; Unna boot; upper back; urinary bladder
UB 82 universal billing document [1982]
UBA undenaturated bacterial antigen; ureidoisobutyric acid
UBB ubiquitin B
UBBC unsaturated vitamin B₁₂ binding capacity
UBC ubiquitin C; University of British Columbia [brace]
UBE ubiquitin-activating enzyme
UBF uterine blood flow
UBG, Ubg urobilinogen
UBI ultraviolet blood irradiation
UBL undifferentiated B-cell lymphoma
UBM ultrasound backscatter microscopy; ultrasound biomicroscopy
UBN urobilin
UBO unidentified bright object
UBP ureteral back pressure
UBPS ultrasound bone profile score
UBS unidentified bright signal
UBT urea breath test
UBW usual body weight
UC ulcerative colitis; ultracentrifugal; umbilical cord; unchanged; unclassifiable; unconscious; undifferentiated carcinoma; undifferentiated cells; unit clerk; unsatisfactory condition; untreated cells; urea clearance; urethral catheterization; urinary catheter; urinary catheterization; urine concentrate; urine culture; usual care; uterine contractions
U&C urethral and cervical; usual and customary
UCA ultrasound contrast agent
UCAID University Corporation for Advanced Internet Development
UCARE, U-CARE Unexplained Cardiac Arrest Registry of Europe
UCB unconjugated bilirubin
UCBC umbilical cord blood culture
UCC Uniform Code Council
UCD urine collection device; user-centered design [information system]; usual childhood diseases
UCDS uniform clinical data set
UCE urea cycle enzymopathy
UCG ultrasonic cardiography; urinary chorionic gonadotropin
UCHD usual childhood diseases
UCI unusual childhood illness; urethral catheter in; urinary catheter in
UCL ulnar collateral ligament; upper collateral ligament; upper confidence limit; upper control limit; urea clearance
UCLP unilateral cleft of lip and palate
UCO ultrasonic cardiac output; urethral catheter out; urinary catheter out
UCOD underlying cause of death
UCP uncoupling protein; urinary coproporphyrin; urinary C-peptide
UCPT urinary coproporphyrin test
UCR unconditioned response; usual, customary, and reasonable [fees]
U_Cr urinary creatinine
UCS unconditioned stimulus; ultimate compressive strength; unconscious; uterine compression syndrome
ucs unconscious
UCT ultrasound computed tomography; urological care table
UCTD, uCTD undifferentiated (unclassifiable) connective tissue disease
UCV uncontrolled variable; unconventional viral [disease]
UCVA uncorrected visual acuity
UD ulcerative dermatosis; ulnar deviation; undetermined; underdeveloped; unit dose; urethral dilatation; urethral discharge; uridine diphosphate; uroporphyrinogen decarboxylase; uterine delivery
UD-AHF UD-CG 115 BS in Acute Heart Failure [study]
UDB universal database
UDC usual diseases of childhood
UDCA ursodeoxycholic acid
UDE user defined edge [aortic tomography]
UDF user data file
UDIR underdose isodose range [radiation]
UDKase uridine diphosphate kinase
UDN ulcerative dermal necrosis
UDO undetermined origin
UDP uridine diphosphate; user datagram protocol
UDPG uridine diphosphate glucose; urine diphosphoglucose
UDPGA uridine diphosphate-glucuronic acid
UDPGT uridine diphosphate glucuronosyl transferase
UDP/IP user datagram protocol/Internet protocol
UDR user defined region
UDR-BMD ultradistal radius bone mineral density
UDRP urine diribose phosphate
UDRV ulcerative disease rhabdovirus
UDS ultrasound Doppler sonography; uniform data system; unscheduled deoxyribonucleic acid [DNA] synthesis
UE uncertain etiology; under elbow; uninvolved epidermis; upper esophagus; upper extremity
UEA Ulex europaeus agglutinin
UEFFDE upper extremity fitness for duty evaluation
UEG ultrasonic encephalography; unifocal eosinophilic granuloma
UEHB uniform effective health benefits
UEL upper explosive limit
UEM universal electron microscope
UEMC unidentified endosteal marrow cell
UES upper esophageal sphincter
uE_s unconjugated estriol
u/ext upper extremity
UF film unsharpness; ultrafiltrate; ultrafiltration; ultrafine; ultrasonic frequency; unaffected female; uncertainty factor; universal feeder; unknown factor; urinary formaldehyde
Uf ultrafiltration
UFA unesterified fatty acid
UFB urinary fat bodies
UFC ultrafast ceramics; urinary free cortisol
UFCT ultrafast computed tomography
UFD ultrasonic flow detector; unilateral facet dislocation
UFFI urea formaldehyde foam insulation
UFH unfractionated heparin
UFL upper flammable limit; upper frequency limit
UFN unreamed femoral nail
UFOV useful field of view
UFP ultrafiltration pressure
UFR ultrafiltration rate; urine filtration rate; uroflowmetry
uFSH urinary follicle-stimulating hormone
UG geometric unsharpness; urogastrone; urogenital
Ug uracyl glycol
UGCR ultrasound-guided compression repair
UGD urogenital diaphragm
UGDP University Group Diabetes Project
UGDV Uasin Gishu disease virus
UGF unidentified growth factor
UGH uveitis-glaucoma-hyphema [syndrome]
UGH+ uveitis-glaucoma-hyphema plus vitreous hemorrhage [syndrome]
UGI upper gastrointestinal [tract]
UGIH upper gastrointestinal hemorrhage
UGIS upper gastrointestinal series
UGME undergraduate medical education
UGP uridyl diphosphate glucose pyrophosphorylase
UGPA undergraduate grade-point average
UGPP uridyl diphosphate glucose pyrophosphorylase
UGS urogenital sinus
UGSV Uganda S virus
UGT uridine diphosphate-glucuronosyltransferase; urogenital tract; urogenital tuberculosis
UH umbilical hernia; unaffected hemisphere; uncontrolled hemorrhage; unfavorable histology; upper half
UHC university hospital consortium
UHD universal heteroduplex generator; unstable hemoglobin disease
UHDDS uniform hospital discharge data set
UHDRS unified Huntington disease rating scale
UHDS uniform hospital dataset
UHF ultrahigh frequency
UHID universal healthcare identifier
UHIS universal healthcare information system; university hospital information system
UHL universal hypertrichosis lanuginosa
UHMM ultrahigh magnification mammography
UHMW ultrahigh molecular weight
UHMWPE ultrahigh molecular weight polyethylene
UHN unreamed humeral nail
UHR underlying heart rhythm
UHS uncontrolled hemorrhagic shock; university health services
UHSC university health services clinic
UHT ultrahigh temperature
UI urinary incontinence; uroporphyrin isomerase; user interface
U/I unidentified
UIBC unsaturated iron-binding capacity
UICAO unilateral internal carotid artery occlusion
UICC Union Internationale Contre le Cancer [International Union Against Cancer]
UID unique identifier; unique image identifier
UIF undegraded insulin factor
UIL user interface language
UIMS user interface management system
UIP unintended pregnancy; usual interstitial pneumonia
UIQ upper inner quadrant
UIR unsolicited information retrieval
UIS Utilization Information Service
UJT unijunction transistor
UK unknown; uridine kinase; urinary kallikrein; urokinase
UKA unicompartmental knee arthroplasty
UKa urinary kallikrein
UKAEA United Kingdom Atomic Energy Authority
UKase uridine kinase
UKCCSG United Kingdom Children's Cancer Study Group
UK-COMA United Kingdom Committee on Medical Aspects [food and nutrition]
UKCSG United Kingdom Collaborative Study Group [timolol trial]
UKEGNS United Kingdom Epidemiology Group for the Nutrition Society
UKHAS United Kingdom Heart Attack Study
UKHEART United Kingdom Heart Failure Evaluation and Assessment of Risk Trial
UK in USA Urokinase in Unstable Angina [study]
UKM urea kinetic modeling
ukn unknown
UKNCSPAIVS United Kingdom National Collaborative Study of Pulmonary Atresia with Intact Ventricular Septum
UKPACE United Kingdom Pacing and Cardiovascular Events [study]; United Kingdom Pacing and Clinical Events [study]
UKPDS United Kingdom Prospective Diabetes Study
UKSAT United Kingdom Small Aneurysm Trial
UK-TIA United Kingdom Transient Ischemic Attack [aspirin trial]
UKTSSA United Kingdom Transplant Support Service Authority
UL ultrasonic; Underwriters Laboratories; undifferentiated lymphoma; upper limb; upper limit; upper lobe
U&L upper and lower
U/l units per liter
ULAM United Network for Organ Sharing Liver Allocation Model
ULBW ultralow birth weight
ULD Unverricht-Lundborg disease
ULDH urinary lactate dehydrogenase
ULDR ultra-low dose rate
ULF ultralow frequency
ULL ultra-lipo-lift
ULLE upper lid of left eye
ULN upper limits of normal
uln ulna, ulnar
ULP ultra low profile; User Liaison Program [Agency for Healthcare Research and Quality]
ULPA ultra low penetration air filter
ULPE upper lobe pulmonary edema
ULQ upper left quadrant
ULR universal leukoreduction
ULRE upper lid of right eye
ULT ultrahigh temperature
ult ultimate
ULTC urban level trauma center
ULTIMA Unprotected Left Main Trunk Intervention Multicenter Assessment
ULTRA utilizing GFX 2.5 stent in small diameter arteries
UltraSTAR ultrasound structured attribute reporting
ULV ultralow volume
ULvWF unusually large von Willebrand factor
UM movement unsharpness; ultra-rapid metabolizer; unaffected male; upper motor [neuron]; uracil mustard; utilization management
uM, μM micromole, micromolar
UMA ulcerative mutilating acropathy; upright membrane assay; urinary muramidase activity
UMAV Umatilla virus
Umax maximum urinary osmolality
umb umbilicus, umbilical
UMBV Umbre virus
UMC unidimensional chromatography; university medical center
UM-CIDI University of Michigan Composite International Diagnostic Interview
UMCV-TO ulnar motor conduction velocity across thoracic outlet
UMD unmodified domain
UMDNS Universal Medical Device Nomenclature System
UME undergraduate medical education
UMHDS uniform minimum health data set
UMI urinary meconium index
UMIN university medical information network
UMKase uridine monophosphate kinase
UML unified modeling language
UMLS Unified Medical Language System
UMN upper motor neuron
UMNL upper motor neuron lesion
UMNS upper motor neuron syndrome
UMP uridine monophosphate

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