Abbreviation
|
Interpretation
|
| O |
objective |
|
opening |
|
eye |
|
oral |
|
office |
|
old |
|
output |
|
often |
|
open |
|
ortho |
|
other |
|
oxygen |
|
zero |
| OA |
Osteoarthritis |
|
obstructive apnea |
|
occipital artery |
|
on admission |
|
on arrival |
|
old age |
| O&A |
observation and assessment |
| OAA |
Old Age Assistance |
|
oxaloacetate |
| OAB |
overactive bladder |
|
old age benefits |
| OAC |
oral anticoagulant |
|
omeprazole, amoxicillin and clarithromycin |
|
oral activated charcoal |
| OAD |
obstructive airway disease |
|
occlusive arterial disease |
|
obliterative airway disease |
|
other articular diseases |
|
obscure auditory dysfunction |
| OAE |
otoacoustic emissions |
| OAF |
osteoclast activating factor |
|
open air factor |
|
oroantral fistula |
| OAG |
open angle glaucoma |
|
Oral Assessment Guide |
| OAM |
omeprazole, amoxicillin, and metronidazole |
|
Office of Alternative Medicine |
| OAP |
Ophthalmic Artery Pressure |
|
osteoarthropathy |
|
over-anxious patient |
| OARS |
organs at risk |
| OAS |
Office of Applied Studies |
|
oral allergy syndrome |
|
oral anticoagulants |
|
organic anxiety syndrome |
|
Oral appliances |
|
overall survival |
|
Ostomy Adjustment Scale |
| OAT |
oral anticoagulant therapy |
|
Optometry Admission Test |
|
open artery trial |
|
O-acetyltransferase |
| OAV |
oculo-auriculo-vertebral |
|
ovine adenovirus |
| OB |
obstetrics |
|
occult blood |
|
obese |
|
obesity |
|
occlusion body |
|
olfactory bulb |
|
osteoblast |
| OBA |
office-based anesthesia |
| OBD |
obscure digestive bleeding |
|
organic brain disease |
|
Opioid bowel dysfunction |
| OBE |
out-of-body experience |
| OBF |
ocular blood flow |
|
organ blood flow |
|
ovarian blood flow |
| OBG |
obstetrics and gynecology |
|
octyl-beta-D-glucopyranoside |
| OBJ |
objective |
| OBL |
oblique |
|
osteoblast-like |
| OBP |
odorant-binding protein |
|
office blood pressure |
|
ova, blood, parasites |
| OBR |
obesity gene receptor |
|
ortho bowel routine |
|
OB receptor |
| OBS |
observation |
|
organic brain syndrome |
|
observed |
|
obstetrics |
|
obesity |
|
occlusion bodies |
| OBT |
obtained |
| OBW |
obese black women |
|
open bed warmer |
| OC |
oral contraceptive |
|
office call |
|
on call |
|
oral cavity |
|
oral care |
|
only child |
|
occlusion |
|
observed cases |
| O&C |
onset and course |
| OCA |
open care area |
|
ovarian carcinoma |
|
Obsessive Compulsive Anonymous |
|
oral contraceptive agent |
|
Operative Care Advised |
| OCB |
obstructive chronic bronchitis |
|
obsessive-compulsive behavior |
|
oxcarbazepine |
| OCC |
occasional |
|
occipital |
|
occlusal |
|
occupation |
|
occurrence |
| OCCL |
occlusion |
| OCCM |
open chest cardiac massage |
| OCD |
obsessive-compulsive disorder |
|
organ-confined disease |
| OCE |
outpatient code editor |
|
oral conjugated estrogens |
|
observable cholinomimetic effects |
| OCG |
oral cholecystogram |
| OCI |
Obsessive-Compulsive Inventory |
|
obliquus capitis inferior (neck muscle) |
| OCL |
oral colonic lavage |
|
osteoclast(s) |
| OCN |
oculomotor nucleus |
|
obsessive-compulsive neurosis |
|
Oncology Certified Nurse |
| OCP |
oral contraceptive pill |
|
oral case presentation |
| OCR |
oculocephalic reflex |
|
oxygen consumption rate |
|
oculocardiac reflex |
|
oculocerebrorenal |
|
outpatient cardiac rehabilitation |
| OCS |
oral contraceptives |
|
open canalicular system |
|
Obsessive-Compulsive Scale |
|
obsessive-compulsive symptoms |
|
obstetric complications |
| OCT |
optical coherence tomography |
|
Oral contraceptive therapy |
|
oxytocin challenge test |
|
oral cavity tumor |
| OCU |
observation care unit |
| OCVM |
occult cerebrovascular malformations |
| OCX |
oral cancer examination |
|
occipital cortex |
| OD |
overdose |
|
right eye |
|
Doctor of Optometry |
|
once daily |
|
ocular dominance |
|
on duty |
|
optic disc |
|
occupational disease |
| ODA |
on day of admission |
|
Operating Department Assistant |
|
Orphan Drug Act |
| ODC |
oxygen dissociation curve |
|
oxyhemoglobin dissociation |
|
outpatient diagnostic center |
| ODD |
Oppositional-Defiant Disorder |
|
Once-daily dosing |
|
oculodentodigital |
| ODE |
optic disc edema |
|
outer dental epithelium |
| ODI |
Oswestry Disability Index |
|
oxygen desaturation index |
| ODM |
occlusion dose monitor |
| ODN |
open donor nephrectomy |
|
optokinetic nystagmus |
| ODP |
Ocular dominance plasticity |
|
occipitodextra posterior |
|
offspring of diabetic parents |
| ODQ |
on direct questioning |
|
Oswestry Disability Questionnaire |
| ODS |
Office of Dietary Supplements |
|
osmotic demyelination syndrome |
|
Office of Drug Safety |
|
Oswestry Disability Score |
| ODT |
orally disintegrating tablet |
|
optical Doppler tomography |
|
occipitodextra transerve |
| OE |
on examination |
|
otitis externa |
|
open eyes |
|
orthopedic examination |
| OEC |
oxygen equilibrium curve |
|
olfactory ensheathing cell |
|
outer ear canal |
| OEI |
opioid escalation index |
|
Obesity Education Initiative |
|
Office of Evaluation and Inspections |
| OEL |
occupational exposure level/limits |
| OENT |
oral endotracheal tube |
| OEP |
olfactory evoked potentials |
|
operational effectiveness program |
|
Office of Emergency Preparedness |
| OER |
oxygen extraction ratio |
|
oxygen enhancement ratios |
|
oestrogen receptor |
| OET |
oral esophageal tube |
|
open epicutaneous test |
|
oral endotracheal tube |
| OF |
opacity factor |
|
occipital-frontal |
|
open field |
|
organ failure |
|
optic fundi |
|
osteitis fibrosa |
|
osteitis fibrosa |
| OFC |
occipitofrontal circumference |
|
oral food challenge |
|
osteitis fibrosa cystica |
|
orofacial clefts |
| OFG |
orofacial granulomatosis |
| OFI |
other febrile illness |
|
ocular fixation index |
| OFLOX |
ofloxacin |
| OFM |
open-face mask |
|
oral focal mucinosis |
| OFR |
oxygen-free radicals |
|
ocular following response(s) |
| OFS |
osteoplastic frontal sinusotomy |
|
occasions for smoking scale |
|
organ failure score |
| OFTT |
organic failure to thrive |
|
oral fat tolerance test |
| OG |
Obstetrics & Gynecology |
|
oral glucose |
|
osmolality gap |
|
orogastric |
| OGC |
oculogyric crisis |
|
oral glutamine challenge |
| OGCT |
oral glucose challenge test |
|
ovarian germ cell tumor |
| OGD |
oesophagogastroduodenoscopy |
|
oxygen and glucose deprivation |
| OGIB |
obscure gastrointestinal bleeding |
| OGNP |
Obstetric-Gynecology Nurse Practitioner |
| OGT |
orogastric tube |
|
oral glucose tolerance |
| OH |
occupational health |
|
occupational history |
|
obstetric history |
|
ocular history |
|
orthostatic hypotension |
|
ocular hypertension |
|
open-heart |
|
oral hypoglycemic |
|
oral hygiene |
| OHA |
oral hypoglycemic agents |
| OHC |
outer hair cell |
| OHD |
organic heart disease |
| OHF |
old healed fracture |
|
omsk hemorrhagic fever |
| OHG |
oral hypoglycemic |
|
optico-hypothalamic gliomas |
| OHI |
oral hygiene instructions /index |
| OHL |
oral hairy leukoplakia |
|
occupational hearing loss |
| OHP |
oxygen at high pressure |
|
orohypopharyngeal |
|
obese hypertensive patient |
| OHS |
obesity hypoventilation syndrome |
|
occupational health service(s) |
|
Oslo Hypertension Study |
|
open heart surgery |
| OHT |
ocular hypertension |
|
orthotopic heart transplantation |
|
orthostatic hypertension |
| OI |
opportunistic infection |
|
oxygen index |
|
osteogenesis imperfecta |
|
otitis interna |
|
obesity index |
| OIC |
opioid-induced constipation |
|
osteogenesis imperfecta congenita |
| OIF |
oil-immersion field |
|
observed intrinsic frequency |
| OIG |
Office of the Inspector General |
| OIH |
orthoiodohippurate |
|
ovulation-inducing hormone |
| OIM |
Obturator internus muscle |
|
optical immunoassay |
| OINT |
ointment |
| OIR |
oxygen-induced retinopathy |
| OIS |
ocular ischemic syndrome |
|
opportunistic infections |
|
Office of Information Systems |
|
Organ Injury Scaling |
| OIT |
ovarian immature teratoma (rare ovarian cancer) |
|
oral immunotherapy |
| OJ |
orange juice |
|
obstructive jaundice |
| OK |
obstructed kidney |
|
all right |
| OKAN |
optokinetic after nystagmus |
| OKC |
odontogenic keratocyst |
| OKN |
optokinetic nystagmus |
| OL |
olfactory lobe |
|
orbital layer |
|
open label |
|
optic lobes |
| OLB |
open-liver biopsy |
|
open-lung biopsy |
|
olfactory bulb |
| OLC |
ouabain-like compound |
|
osteoclast-like cell |
| OLD |
obstructive lung disease |
| OLE |
occipital lobe epilepsy |
| OLF |
olfactory |
|
ouabain-like factor(s) |
| OLM |
ocular larva migrans |
| OLP |
oral lichen planus |
| OLR |
oral lichenoid reactions |
| OLS |
ouabain-like substance |
|
operating limits |
| OLT |
orthotopic liver transplant |
| OLV |
one-lung ventilation |
| OLZ |
olanzapine |
| OM |
otitis media |
|
ovulation method |
|
outer membrane |
|
obtuse marginal |
|
ocular movement |
|
oral motor |
|
osteomyelitis |
|
onychomycosis |
| OMA |
ocular motor apraxia |
|
older maternal age |
| OMAC |
otitis media, acute, catarrhal |
| OMAS |
Oral Mucositis Assessment Scale |
|
otitis media, acute, suppurating |
| OMB |
obtuse marginal branch |
| OMC |
open mitral commissuortomy |
|
oculomotor complex |
| OMD |
organic mental disorder |
|
ocular muscle dystrophy |
| OME |
otitis media with effusion |
|
oral morphine equivalent |
|
Office of Medical Examiner |
| OMG |
ocular myasthenia gravis |
| OMI |
old myocardial infarction |
|
Oral Mucositis Index |
| OMP |
outer membrane protein |
|
omeprazole |
|
oculomotor palsy |
| OMR |
Online Medical Record |
|
operative mortality rate |
|
oculomotor range |
| OMS |
organic mental syndrome |
|
opsoclonus-myoclonus syndrome |
|
oral morphine sulfate |
| OMT |
oral mucosal transudate |
|
osteopathic manipulative treatment |
| OMVC |
open mitral valve commissurotomy |
| OMVD |
optimized microvessel density |
| ON |
optic nerve |
|
optic neuritis |
|
over night |
| ONB |
olfactory neuroblastoma |
| ONC |
Oncology |
|
over-the-needle catheter |
|
Orthopedic Nurse, Certified |
| OND |
ondansetron |
|
other neurological disorders |
|
optic nerve disease |
| ONH |
optic nerve head |
|
optic nerve hypoplasia |
| ONJ |
osteonecrosis of the jaw |
| ONM |
ocular neuromyotonia |
| ONSD |
optic nerve sheath decompression |
| ONSF |
optic nerve sheath fenestration |
| ONTD |
open neural tube defect(s) |
| ONTR |
orders not to resuscitate |
| OO |
oophorectomy |
|
ophthalmic ointment |
|
oral order |
|
orbicularis oculi |
| OOB |
out of bed |
| OOC |
odontogenic cyst |
|
onset of contractions |
|
out of cast |
|
Outlet obstructive constipation |
| OOH |
out of hospital |
| OOL |
onset of labor |
| OOM |
onset of menarche |
|
oogonial metaphase |
| OOP |
out of pocket |
|
out of pelvis |
| OOR |
orbicularis oculi reflex |
|
out of room |
| OOS |
orbicularis oris superior |
|
out of sequence |
| OOW |
out of wedlock |
|
out of work |
| OP |
osmotic pressure |
|
opening pressure |
|
outpatient |
|
oropharynx |
|
operation |
|
outpatient |
|
obese patient |
| O&P |
ova and parasites |
| OPA |
oropharyngeal airway |
| OPAT |
outpatient parenteral antibiotic therapy |
| OPB |
outpatient basis |
|
open brain |
| OPC |
Objective Performance Criteria |
|
outpatient care |
|
Office of Primary Care |
|
oropharyngeal candidiasis |
| OPD |
outpatient department |
|
obstructive pulmonary disease |
|
oropharyngeal dysphagia |
|
oculopharyngeal dystrophy |
| OPE |
outpatient evaluation |
| OPG |
ocular plethysmography |
|
opening |
|
oocysts per gram |
| OPK |
ovulation predictor kit |
| OPL |
other party liability |
|
oral premalignant lesion |
| OPM |
occult primary malignancy |
| OPN |
operation |
|
open partial nephrectomy |
| OPO |
organ procurement organizations |
| OPP |
oppose |
|
Organophosphate poisoning |
| OPS |
Objective Pain Scale |
|
organophosphates |
|
optical position sensor |
| OPT |
Ovulation Predictor Test |
|
outpatient |
|
optimum |
| OPV |
oral polio vaccine |
|
outpatient visit |
| OR |
operating room |
|
odds ratio |
|
open reduction |
| ORD |
optical rotatory dispersion |
|
orderly |
| ORL |
Otorhinolaryngology |
|
oblique retinacular ligament |
| ORN |
operating room nurse |
| OROS |
oral osmotic |
| ORP |
operating room personnel
|
|
oxidation-reduction potentials |
|
occiput right posterior |
| ORR |
overall response rate |
|
objective response rate |
| ORS |
olfactory reference syndrome |
|
oral rehydration solution |
|
oculo-respiratory syndrome |
| ORT |
operating room technician |
|
oral rehydration therapy |
| OS |
left eye |
|
overall survival |
|
open surgery |
|
oral surgery |
|
occupational safety |
| OSA |
obstructive sleep apnea |
|
osteosarcoma |
| OSC |
open sigmoid colectomy |
|
oral self-care |
| OSD |
Osgood-Schlatter disease |
|
occupational skin disease |
| OSE |
ovarian surface epithelium |
| OSM |
osmolarity |
| OSN |
olfactory sensory neuron |
|
off-service note |
| OSP |
Oligodendrocyte-specific protein |
|
Oral Sodium Phosphate |
| OSR |
open surgical repair |
|
overall survival rate |
| OSS |
osseous |
| OST |
out-of-school-time |
|
Ottawa Stroke Trial |
|
Oligosaccharyltransferase |
|
overall survival time |
| OT |
objective test |
|
Occupational Therapist |
|
occupational therapy |
|
occlusion time |
|
office therapy |
| OTA |
occupational therapy assistant |
|
open to air |
| OTC |
over-the-counter |
|
off the case |
| OTD |
optimal therapeutic dose |
|
oral temperature device |
| OTE |
optically transparent electrode |
|
Overall Treatment Evaluation |
| OTO |
otology |
|
one-time only |
| OT/RT |
occupational therapy/recreational therapy |
| OTS |
optical tracking system |
|
orotracheal suction |
|
oxygen transport system |
| OTT |
oral transit time |
|
overall treatment time |
|
oesophageal transit time |
| OTW |
over the wire |
| OU |
both eyes / each eye |
| OUES |
oxygen uptake efficiency slope |
| OULQ |
outer upper left quadrant |
| OURQ |
outer upper right quadrant |
| OUS |
obstetric ultrasound |
|
observation units |
| OV |
office visit |
|
ovulation |
|
osteoid volume |
| OVCA |
ovarian cancer |
| OVD |
occlusal vertical dimension |
|
ophthalmic viscoelastic device |
| OVLT |
organum vasculosum of lamina terminalis |
| OVR |
Office of Vocational Rehabilitation |
|
oculovestibular reflex |
| OVS |
overall survival |
|
obstructive voiding symptoms |
| OW |
once weekly |
|
open wound |
|
oval window |
|
overweight |
| OX |
oxalate |
|
oxide |
|
oximeter |
| OXA |
oxacillin |
|
oxaplatin |
| OXC |
oxcarbazepine |
| OXT |
oxytocin |
| OZ |
ounce |
|
optical zone |
| |
|
