Dictionary of Medical Acronyms & Abbreviations

[ U ]

• 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