Dictionary of Medical Acronyms & Abbreviations

[ O ]

• ODBC  open database connectivity
• ODC  oritidine decarboxylase; ornithine decarboxylase; oxygen dissociation curve
• Odc  ornithine decarboxylase
• ODCP  ornithine decarboxylase pseudogene
• ODD  oculodentodigital [dysplasia]; oppositional defiant disorder; osteodental dysplasia
• OD'd  overdosed [drug]
• ODE  Office of Device Evaluation [of FDA]; ordinary differential equation
• ODED  oculo-digito-esophago-duodenal [syndrome]
• ODES  Oslo Diet and Exercise Study
• ODFR  oxygen-derived free radical
• ODIF  office document interchange format
• ODISY  Online Deaconess Information System
• ODM  ophthalmodynamometer, ophthalmodynamometry
• ODN  oligodeoxyribonucleotide
• ODOD  oculo-dento-osseous dysplasia
• Odont  odontogenic
• ODP  offspring of diabetic parents; open distributed processing; right occipitoposterior [fetal position, Lat. occipito-dextra posterior]
• ODPHP  Office of Disease Prevention and Health Promotion
• ODQ  on direct questioning
• ODRV  Odrenisrou virus
• ODS  organized delivery system; original dataset; osmotic demyelination syndrome
• ODSG  ophthalmic Doppler sonogram
• ODT  oculodynamic tract; right occipitotransverse [fetal position, Lat. occipito-dextra transversa]
• ODTS  organic dust toxic syndrome
• ODU  optical density unit
• OE  on examination; organization engine [database]; orthopedic examination; otitis externa; out-stationed enrollment
• O/E  observed/expected [ratio]
• O&E  observation and examination
• Oe  oersted
• OEE  osmotic erythrocyte enrichment; outer enamel epithelium
• OEF  oil immersion field; oxygen extraction fraction
• O₂EI  oxygen extraction index
• OEIS  omphalocele, exstrophy, imperforate anus, spinal defects [complex]
• OEL  occupational exposure limit
• OELM  optimal external laryngeal manipulation
• OEM  object exchange model; opposite ear masked; original electronic manufacturer
• OEP  operational effectiveness program
• OEPA  Onchocerciasis Elimination Program for the Americas
• OER  osmotic erythrocyte [enrichment]; oxygen enhancement ratio
• O₂ER  oxygen extraction ratio
• OERP  Office of Education and Regional Programming
• OERR  order entry and results reporting
• OE/RR  online physician's order entry and results reporting
• OES  oral esophageal stethoscope; optical emission spectroscopy
• oesoph  esophagus [oesophagus]
• OET  oral endotracheal tube; oral esophageal tube
• O₂Ext  oxygen extraction
• OF  occipitofrontal; opacity factor; open field [test]; optical fundus; orbital fracture; orbitofrontal; osmotic fragility; osteitis fibrosa; output factor; oxidation-fermentation
• O/F  oxidation-fermentation
• OFA  oncofetal antigen
• OFAGE  orthogonal field alternation gel electrophoresis
• OFBM  oxidation-fermentation basal medium
• OFC  occipitofrontal circumference; optical flow constraint [equation]; orbitofacial cleft; osteitis fibrosa cystica
• OFCTAD  occipito-facio-cervico-thoraco-abdomino-digital dysplasia
• OFD  object-film distance; occipital frontal diameter; oro-facial-digital [syndrome]
• ofd  object-film distance
• Off  official
• OFHA  occipitofrontal headache
• OFI  open and flexible learning
• OFM  orofacial malformation
• OFNE  oxygenated fluorocarbon emulsion [delivery system]
• OFS  optical file system
• OFTT  organic failure to thrive
• OFUN  organism function [UMLS]
• OG  obstetrics and gynecology; occlusogingival; 1-O-octyl-beta-D-glucopyranoside; oligodendrocyte; optic ganglion; orange green; orogastric; [protective] overgarment
• O&G  obstetrics and gynecology
• OGC  oculogyric crisis
• OGD  [o]esophago-gastro-duodenoscopy
• OGDH  oxoglutarate dehydrogenase
• OGF  ovarian growth factor; oxygen gain factor
• OGH  ovine growth hormone
• OGI  oxygen-glucose index
• OGJ  [o]esophagogastric junction
• OGS  oxygenic steroid
• OGTT  oral glucose tolerance test
• OGZN  organization [UMLS]
• OH  hydroxycorticosteroid; obstructive hypopnea; occipital horn; occupational health; occupational history; oligomer hybridization; open heart [surgery]; orthostatic hypotension; osteopathic hospital; out of hospital; outpatient hospital
• 17-OH  17-hydroxycorticosteroid
• OHA  oral hypoglycemic agents
• OHAHA  ophthalmoplegia-hypotonia-ataxia-hypacusis-athetosis [syndrome]
• OHB₁₂  hydroxycobalamin
• O₂Hb  oxyhemoglobin
• OHC  occupational health center; outer hair cell; Oxford Haemophilia Centre
• 5-OHC  5-hydroxycysteine
• OHCA  out-of-hospital cardiac arrest
• OH-Cbl  hydroxycobalamin
• OHCC  hydroxycalciferol; out-of-home child care
• OHCOB  hydroxycobalamin
• OHCS  hydroxycorticosteroid
• OHD  hydroxylase deficiency; hydroxyvitamin D; Office of Human Development; Ondine-Hirschsprung disease; organic heart disease
• 1,25(OH)₂D₃  1,25-dihydroxyvitamin D₃ [calcium transport]
• 25-OH-D  25-hydroxyvitamin D
• OHDA  hydroxydopamine
• 8-OH-dG  8-hydroxy-2´-deoxyguanosine
• 16-OH-DHAS  16-alpha-hydroxydehydroepiandrosterone sulfate
• 8-OH-DPAT  8-hydroxy-2-(di-n-propylamino)tetralin
• OHDS  Office of Human Development Services
• OHE  other hospital employee
• OHF  Omsk hemorrhagic fever
• OHFA  hydroxy fatty acid
• OHFT  overhead frame trapeze
• OHFV  Omsk hemorrhagic fever virus
• OHI  Occupational Health Institute; operative hypertension indicator; oral hygiene index; Oral Hygiene Instruction
• OHIAA  hydroxyindoleacetic acid
• OHIPD  Office of Health Information Programs Development
• OHI-S  Oral Hygiene Instruction-Simplified
• OHL  oral hairy leukoplakia
• OHMO  Office of Health Maintenance Organizations
• OHN  occupational health nurse; optical nerve head
• OHP  hydroxyprogesterone; hydroxyproline; occupational health plan; Oregon Health Plan; oxygen under high pressure
• 17-OHP  17-hydroxyprogesterone
• OHPCC  Office of High Performance Computing and Communications
• OHR  occupational health research; Office of Health Research
• OHS  obesity hypoventilation syndrome; occipital Horn syndrome; occupational health and safety; occupational health service; ocular histoplasmosis syndrome; open heart surgery; Oslo Hypertension Study; ovarian hyperstimulation syndrome
• OHSD  hydroxysteroid dehydrogenase
• OHSR  Office of Human Subject Research [NIH]
• OHSS  ovarian hyperstimulation syndrome
• OHT  ocular hypertension; orthotopic heart transplantation; Oslo Heart Trial
• OHTA  Office of Health Technology Assessment
• 5-OHU  5-hydroxyuracil
• OI  obturator internus; occasional insomnia; opportunistic infection; opsonic index; orgasmic impairment; orientation inventory; orthoiodohippurate; osteogenesis imperfecta; ouabain insensitivity; oxygen intake
• O-I  outer and inner
• OIC  organized indigenous caregiving; osteogenesis imperfecta congenita
• OID  object identifier; optimal immunomodulating dose; Organism Identification Number; oxygen insufflation device
• OIF  observed intrinsic frequency; oil immersion field; open internal fixation; Osteogenesis Imperfecta Foundation
• OIG  Office of the Inspector General
• OIH  Office of International Health; orthoiodohippurate; ovulation-inducing hormone
• OILD  occupational immunologic lung disease
• oint  ointment
• OIP  organizing interstitial pneumonia
• OIR  Office of Information Resources; Office of International Research
• OIS  object information system; organ injury scale; Oslo Ischemia Study; outpatient information system
• OIT  organic integrity test
• OITAV  Oita virus
• OJ  orange juice
• OKC  odontogenic keratocyst
• OKHV  Okhotskiy virus
• OKN  optokinetic nystagmus
• OKOV  Okola virus
• OKR  optokinetic response; Ottawa knee rules
• OKS  optokinetic stimulus
• OKT  ornithine ketoacid amino-transferase
    O₀ | O₁ | O₂ | O₃