COMMON MEDICAL/DENTAL ABBREVIATIONS AND ACRONYMS

Common Medical/Dental Abbreviations and Acronyms a (specific) absorption ALS advanced life support; AVN atrioventricular node (coefficient) (USUALLY amyotrophic lateral AW atomic weight ITALIC); (total) acidity; sclerosis; antilymphocyte ax. axis area; (systemic) arterial serum AZT azidothymidine (blood) (SUBSCRIPT); ALT alanine (zidovudine) asymmetric; atto aminotransferase B barometric (pressure) A absorbance Am americium (SUBSCRIPT); boron A˚ angstrom; A˚ ngstro¨m unit AML acute myelogenous B or Bucc buccal surface aa [G.] ana of each (USED leukemia (caries or restoration) in prescriptions) ANOVA analysis of Ba barium AA amino acid; aminoacyl variance BBB blood brain barrier; Ab antibody ANS autonomic nervous bundle branch block ABG arterial blood gas system BBT basal body temperature ABO blood group system ANUG acute necrotizing BCG bacille bilie´ de a.c. [L.] ante cibum, before ulcerative gingivitis Calmette Gue´rin (vaccine) a meal AP anteroposterior Be beryllium AC acetate; APAP acetaminophen Bi bismuth acromioclavicular; air ARDS adult or acute b.i.d. [L.] bisindie, twice a conduction; alternating respiratory distress day current; atriocarotid syndrome BMD bone mineral density ACE angiotension ARF acute renal failure; BMI body mass index converting enzyme acute rheumatic fever BP blood pressure; boiling ACEI angiotensin As arsenic point; British converting enzyme ASA acetylsalicylic acid Pharmacopoeia inhibitor (aspirin) BPH Bachelor of Public ACh, Ach acetylcholine ASCP American Society Health, benign prostatic ACTH adrenocorticotropic of Clinical Pathologists hyperplasia hormone (corticotropin) AST aspartate Bq becquerel (SI unit of ad lib. [L.] ad libitum, aminotransferase radionuclide activity) freely, as desired at. wt. atomic weight Br bromine ADH antidiuretic hormone ATL adult T cell BS, BSc Bachelor of Science ADHD attention deficit leukemia; adult T cell (Baccalaureus Scientiae) hyperactivity disorder lymphoma BSA body surface area ADLs activities of daily atm (standard) atmosphere BSN Bachelor of Science in living ATP adenosine 5′ Nursing ADR adverse drug reaction triphosphate BT bleeding time AED automated external ATPase adenosine BTPS body temperature, defibrillator triphosphatase ambient pressure, AFB acid fast bacillus ATPD ambient saturated (with water Ag (or AG) amalgam temperature and vapor) restoration, silver alloy pressure, dry BTU British thermal unit amalgam; antigen; [L.] ATPS ambient temperature BTX botulinum toxin argentum, silver and pressure, saturated BUN blood urea nitrogen A:G R albumin globulin (with water vapor) BUS Bartholin glands, ratio Au [L.] aurum, gold urethra, Skene glands AIDS acquired AUC area under the curve Bx biopsy immunodeficiency AV arteriovenous c calorie (small); capillary syndrome A-V arteriovenous; (blood); centi Al aluminum atrioventricular C calorie (large); carbon; ALL acute lymphocytic AVM Celsius; centigrade; leukemia arteriovenousmalformation clearance (rate, renal) C; COMMON MEDICAL/DENTAL ABBREVIATIONS AND ACRONYMS

compliance; concentration; CGA catabolite gene CPK creatine phosphokinase cylindric (lens); cytidine activator CPR cardiopulmonary c [L.] cum, with cGMP cyclic guanosine resuscitation C&S culture and sensitivity monophosphate cps cycles per second C.C. chief complaint cgs, CGS centimeter- CPT Current Procedural c/o complains of gramsecond (system, unit) Terminology ca. [L.] circa, about, ChB Bachelor of Surgery Cr chromium; creatinine approximately (Chirurgiae Baccalaureus) CR Chief Resident; Ca calcium; cathodal; ChD, Chir Doct Doctor of conditioned reflex; cathode Surgery (Chirurgiae crown rump (length) CA cancer; carcinoma; Doctor) CRD chronic respiratory cardiac arrest; CHF congestive heart failure disease chronologic age; contrast CHO carbohydrate CRNA Certified Registered angiography; croup Ci curie Nurse Anesthetist associated (virus); CI color index; Colour CRNP Certified Registered cytosine arabinoside Index; confidence interval Nurse Practitioner CABG coronary artery CJD Creutzfeldt-Jakob CRP cross reacting protein bypass graft disease CRT Certified Respiratory CAD coronary artery CK creatine kinase Therapist disease Cl chlorine Cs cesium cal calorie (small) CL cardiolipin CSF cerebrospinal fluid; Cal calorie (large) CLA(ASCP) Clinical colony-stimulating factor CAM complementary and Laboratory Assistant CT computed tomography alternative medicine (American Society of Cu [L.] cuprum, copper CAO conscious, alert, Clinical Pathologists) CV cardiovascular oriented CLIA Clinical Laboratory CVA cerebral vascular cap capsule Improvement Amendments (cerebrovascular) CAPD continuous CLL chronic lymphocytic accident, costovertebral ambulatory peritoneal leukemia angle dialysis cm centimeter CVP central venous CAT computerized axial Cm curium pressure tomography (obsolete) CMA Certified Medical CVS cardiovascular system; CBC complete blood (cell) Assistant chorionic villus sampling count CME continuing medical CXR chest x-ray ⅜\ cc, c.c. cubic centimeter education ⌬ delta; change; heat CCU coronary care unit; CMI cell mediated d deci-; day critical care unit immunity d dextrorotatory Cd cadmium CML chronic myelogenous D- prefix indicating that a CD compact disc leukemia molecule is sterically CDA Certified Dental CMO Chief Medical Officer analogous to D Assistant CMT Certified Medical glyceraldehyde CDC (U.S.) Centers for Transcriptionist da deca Disease Control and CMV controlled mechanical Da dalton Prevention ventilation; DA developmental age CDP cytidine 5′ diphosphate cytomegalovirus db, dB decibel Ce cerium CNS central nervous system DC Dental Corps; Doctor CEU continuing education Co cobalt of Chiropractic; direct unit Comp composite resin current Cf californium restoration ⅜\ D/C discharge; CF complement fixation; COPD chronic obstructive discontinue cystic fibrosis; coupling pulmonary disease DCh Doctor of Surgery factor COS Chief of Staff (Doctor Chirurgiae)

The forbidden symbol (⅜\ ) appears opposite abbreviations prohibited by the Joint Commission on Accreditation of Healthcare Organizations (JCAHO). COMMON MEDICAL/DENTAL ABBREVIATIONS AND ACRONYMS

DDS Doctor of Dental dr dram ENT ear, nose, and throat Surgery Dr Med Doctor of EPO erythropoietin def decayed, extracted, or Medicine ER endoplasmic reticulum; filled (deciduous teeth) DRG diagnosis-related emergency room DEF decayed, extracted, or group Er erbium filled (permanent teeth) DrPH Doctor of Public ERBF effective renal blood DEXA dual energy x-ray Health; Doctor of Public flow absorptiometry Hygiene ERPF effective renal plasma df decayed and filled DRVVT dilute Russell flow (deciduous teeth) viper venom test ERT estrogen replacement DF decayed and filled D-S Doerfler Stewart (test) therapy (permanent teeth) DSA digital subtraction Es einsteinium DH Dental Hygienist angiography ESEP extreme DIC disseminated DSc Doctor of Science somatosensory evoked intravascular coagulation DSD dry sterile dressing potential DIF direct DVM Doctor of Veterinary ESR electron spin immunofluorescence Medicine resonance; erythrocyte DJD degenerative joint DVT deep vein thrombosis sedimentation rate disease Dx diagnosis ESRD end stage renal dk deca-, deka- EB Epstein Barr (virus) disease DKA diabetic ketoacidosis EBV Epstein Barr virus ESWL extracorporeal shock- dL deciliter ECF extended care wave lithotripsy dM decimorgan facility; extracellular EtOH ethyl alcohol DM diabetes mellitus fluid Eu europium DMD Doctor of Dental ECG electrocardiogram ev, eV electron volt Medicine; Duchenne ECM erythema chronicum F Fahrenheit; faraday muscular dystrophy migrans (constant); fertility DME Director of Medical ECMO extracorporeal (factor); field (of vision); Education membrane oxygenation fluorine; force; fractional dmf decayed, missing, or ECS electrocerebral silence (concentration); free filled (deciduous teeth) ECT electroconvulsive (energy) DMF decayed, missing, or therapy f femto-; (respiratory) filled (permanent teeth) ED eating disorder; frequency DMSO dimethyl sulfoxide effective dose; FAAN Fellow of the DMT N,N emergency department; American Academy of dimethyltryptamine erectile dysfunction Nursing DMV Doctor of Veterinary EEG electroencephalogram FAAP Fellow of the Medicine EENT eye, ear, nose, and American Academy of DNR do not resuscitate throat Pediatrics DO disto-occlusal surfaces EIA enzyme immunoassay FACA Fellow of the (caries or restoration); EKG [German] American College of Doctor of Osteopathy Elektrokardiogramme, Anesthesiology DOA dead on arrival electrocardiogram FACAL Fellow of the DOB date of birth ELISA enzyme-linked American College of DP Doctor of Pharmacy; immunosorbent assay Allergy Doctor of Podiatry EMF electromotive force FACC Fellow of the DPH Doctor of Public EMG electromyogram; American College of Health; Doctor of Public exomphalos, Cardiologists Hygiene macroglossia, and FACD Fellow of the DPharm Doctor of gigantism (syndrome) American College of Pharmacy EMS eosinophilia-myalgia Dentists DPM Doctor of Physical syndrome FACFP Fellow of the Medicine; Doctor of EMT Emergency Medical American College of Podiatric Medicine Technician Family Physicians COMMON MEDICAL/DENTAL ABBREVIATIONS AND ACRONYMS

FACO Fellow of the FVC forced vital capacity H&Hhematocrit and American College of Fx fracture hemoglobin hydrogen ion םOtolaryngology G giga; glucose; gravitation H FACOG Fellow of the (newtonian constant of); HAART highly active American College of guanosine (or guanylic anti-retroviral therapy Obstetricians and acid) residues in HAV hepatitis A virus Gynecologists polynucleotides Hb hemoglobin FACOS Fellow of the g gram HbA adult hemoglobin American College of Ga gallium HBcAg Hepatitis B core Orthopaedic Surgeons GABA ␥-aminobutyric acid antigen FACP Fellow of the GABHS group-A HBe Hepatitis B early American College of ␤-hemolytic Streptococcus antigen Physicians Gal galactose HBeAb Hepatitis B early FACR Fellow of the GC gonococcus, gonorrhea antibody American College of Gd gadolinium HbeAg Hepatitis B early Radiology Ge germanium antigen FACS Fellow of the GERD gastroesophageal Hbg hemoglobin American College of reflux disease HBIG hepatitis B immune Surgeons GFR glomerular filtration globulin FAMA Fellow of the rate HBO hyperbaric oxygen American Medical GGT ␥-glutamyl transferase HBsAb hepatitis B surface Association GH-RH growth hormone antibody FB foreign body releasing hormone HBsAg hepatitis B surface FBS fasting blood sugar GI gastrointestinal; Gingival antigen FDA (U.S.) Food and Index HBV hepatitis B virus Drug Administration GIC glass ionomer cement HCFA Health Care Fe [L.] ferrum, iron GLC gas liquid Financing FEF forced expiratory chromatography Administration flow GMO General Medical HCl hydrochloric acid; FET forced expiratory Officer hydrochloride time GMS Gomori (or Grocott) Hct hematocrit FEV forced expiratory methenamine silver HCV Hepatitis C virus volume (stain) h. d. [L.] hora decubitus, FF filtration fraction GN Graduate Nurse at bedtime FFD focus film distance GOT glutamic oxaloacetic HDL high-density FIA fluorescent transaminase (aspartate lipoprotein immunoassay aminotransferase) Hg [L.] hydrargyrum, FISH fluorescent in situ GPI Gingival Periodontal mercury hybridization Index Hgb hemoglobin Fm fermium FNA fine-needle aspiration gr grain HGE human granulocytic FPD Fixed Partial Denture GSW gunshot wound ehrlichiosis fps, FPS foot pound gt. [L.] gutta,adrop HGH human (pituitary) second (system, unit) gtt. [L.] guttae, drops growth hormone Fr francium; French GTT glucose tolerance test HGSIL high-grade (gauge, scale) GU genitourinary squamous intraepithelial FRC functional residual GVHD graft versus host lesion capacity (of lungs) disease HIPAA Health Insurance French (catheter gauge) Gy gray (unit of absorbed Portability and FTA-ABS fluorescent dose of ionizing radiation) Accountability Act treponemal antibody H henry; hydrogen; HIV human absorption (test) hyperopia; hyperopic immunodeficiency virus F/U follow-up h Planck constant HLA human lymphocyte FUO fever of unknown H&Ehematoxylin and antigen, human origin eosin leukocyte antigen COMMON MEDICAL/DENTAL ABBREVIATIONS AND ACRONYMS

HMG CoA 3 hydroxy 3 IF initiation factor; LD lethal dose methylglutaryl coenzyme intrinsic factor LDL low-density lipoprotein A IFN interferon LE lupus erythematosus HMO Health Maintenance Ig immunoglobulin LGV lymphogranuloma Organization IGF insulinlike growth venereum h/o history of factor LP lumbar puncture HPF high power field IL interleukin LPN Licensed Practical HPI history of present ILA insulinlike activity Nurse illness IM internal medicine; ⅜\ ␮ mu; micro; heavy chain HPV human papillomavirus intramuscular(ly); class corresponding to ⅜\ h. s., HS [L.] hora somni, infectious mononucleosis IgM at bedtime IMS Indian Medical ⅜\ ␮Ci microcurie HSV herpes simplex virus Service ⅜\ ␮g microgram 5-HT 5-hydroxytryptamine IND investigational new ⅜\ ␮l,␮L microliter (serotonin) drug ⅜\ ␮m micrometer Ht hyperopia, total INR international ␮␮ micromicro HTLV human T cell normalized ratio m mass; meter; milliminim; lymphocytotrophic virus; IOML infraorbitomeatal molar human T cell lymphoma/ line m- meta leukemia virus IP interphalangeal; M mega, meg; molar; moles HTN hypertension intraperitoneal(ly) (per liter); morgan; Hx (medical) history IPAP inspiratory positive myopic; myopia Hz hertz airway pressure M molar; moles (per liter) 125I iodine 125 IQ intelligence quotient m moles (per liter) 131I iodine 131 IRB institutional review mA milliampere 123I iodine 123 board MA Master of Arts (radioisotope) IU International Unit (Magister Artium); I&Dincision and IV intravenous, Medical Assistant; mental drainage intravenously; age I&O(fluid) intake and intraventricular MAb monoclonal antibody output IVDA intravenous drug MAC Mycobacterium avium IADLs instrumental abuse(r) complex activities of daily living IVP intravenous pyelogram MAI Mycobacterium IBD inflammatory bowel J flux (density) aviumintracellulare disease J joule MAO monoamine oxidase IBS irritable bowel K [Mod. L.] kalium, MAOI monoamine oxidase syndrome potassium; kelvin inhibitor IBW ideal body weight k kilo mA-S milliampere second ICD International kat katal MBC maximum breathing Classification of Diseases kb kilobase capacity of the World Health kc kilocycle MC Medical Corps Organization; implantable kcal kilocalorie mCi millicurie cardioverterdefibrillator kDa kilodalton mcm millimicron ICDA International kg kilogram MD [L.] Medicinae Doctor, Classification of Diseases, KOH potassium hydroxide Doctor of Medicine Adapted for Use in the KS Kaposi sarcoma Med Tech Medical United States kv kilovolt Technician; Medical ICP intracranial pressure kVp kilovolt peak Technologist ICU intensive care unit l, L liter (use of CAPITAL MEDLARS Medical ID infective dose letter preferred) Literature Analysis and IDU idoxuridine; injecting/ LorLinglingual surface Retrieval System injection drug user (caries or restoration) meq, mEq milliequivalent

The forbidden symbol (⅜\ ) appears opposite abbreviations prohibited by the Joint Commission on Accreditation of Healthcare Organizations (JCAHO). COMMON MEDICAL/DENTAL ABBREVIATIONS AND ACRONYMS

MEV million electron MRI magnetic resonance Ni nickel volts (106 ev) imaging NIH National Institutes of mg milligram mRNA messenger RNA Health Mg magnesium MRSA methicillin-resistant NK natural killer (cell) MHC major Staphylococcus aureus NKA no known allergies histocompatibility MS Master of Science NLM National Library of complex ⅜\ MS multiple sclerosis; Medicine MHz megahertz magnesium sulfate; nm nanometer MI mitral insufficiency; morphine sulfate NP Nurse Practitioner myocardial infarction msec millisecond NPO [L.] nihil per os, ml, mL milliliter m/sec meters per second nothing by mouth MLC mixed lymphocyte MSG monosodium NS normal saline culture (test) glutamate NSAID nonsteroidal MLD minimal lethal dose MSM men who have sex antiinflammatory drug mm millimeter with men NSR normal sinus rhythm mmHg millimeters of MSN Master of Science in NUG necrotizing ulcerative mercury (torr) Nursing gingivitis mmol millimole MT Medical Technologist; ⍀ omega; ohm MMPI Minnesota Medical Transcriptionist; o- ortho Multiphasic Personality Monitor Technician O [L.] oculus, eye; Inventory (test) mtDNA mitochondrial DNA opening (in formulas for MMR measles-mumps- MUGA multiple gated electrical reactions); rubella (vaccine) acquisition (imaging) oxygen Mn manganese mV millivolt OB obstetrics Mo molybdenum Mv mendelevium OB/GYN obstetrics (and) MO mesio-occlusal MVA motor vehicle accident gynecology surfaces (caries or MW molecular weight OC oral contraceptive restoration); Medical ␯ nu; kinematic viscosity Occ occlusal surfaces Officer; mineral oil n index of refraction; nano (caries or restoration) MOC Medical Officer on Call N newton; nitrogen; normal OCD obsessive compulsive MOD Medical Officer of (concentration) disorder the Day N normal (SMALL caps) OD Doctor of Optometry; mol mole Na [Modern L.] natrium, Officer of the Day; mol wt molecular weight sodium overdose ⅜\ MOM Milk of Magnesia NA Nomina Anatomica OD [L.] oculus dexter, MOPP Mustargen NAD nicotinamide adenine right eye (mechlorethamine dinucleotide; no apparent ODD oculodentodigital hydrocholoride), (or acute) distress (dysplasia, syndrome) Oncovin (vincristine NCV nerve conduction Oe oersted (centimeter sulfate), procarbazine velocity gram second unit of hydrochloride, and Nd neodymium magnetic field strength) prednisone Nd:YAG neodymium: OFD orofaciodigital MPD maximal permissible yttriumaluminum- garnet (dysostosis, syndrome) dose [laser] OML orbitomeatal line MPH Master of Public NDA New Drug Application OMM Health Ne neon ophthalmomandibulomelic MRCP Member of the NE norepinephrine; not (dysplasia, syndrome) Royal College of examined OP osmotic pressure; Physicians NF National Formulary outpatient MRCS Member of the ng nanogram OPV oral poliovirus Royal College of NGF nerve growth factor vaccine Surgeons (antigen) OR operating room

The forbidden symbol (⅜\ ) appears opposite abbreviations prohibited by the Joint Commission on Accreditation of Healthcare Organizations (JCAHO). COMMON MEDICAL/DENTAL ABBREVIATIONS AND ACRONYMS

ORIF open reduction and PEEP positive end p.r.n. PRN, [L.] pro re nata, internal fixation expiratory pressure as needed Os osmium PEG polyethylene glycol psi pounds per square inch OSA obstructive sleep apnea PET positron emission PSV pressure-supported OSHA Occupational Safety tomography ventilation and Health Administration PFM porcelain fused to PT physical therapy; OT occupational therapy; metal (crown) prothrombin time Koch old tuberculin pg picogram Pt platinum OTC over the counter PG prostaglandin PTH parathyroid hormone (nonprescription) drug PGA prostaglandin A PTT partial thromboplastin ⅜\ OU [L.] oculus uterque, PGB prostaglandin B time each eye (both eyes) PGE prostaglandin E PVC premature ventricular oz ounce PGF prostaglandin F contraction p pico; pupil pH hydrogen ion PVL plasma viral load p- para concentration; p (power) PVP polyvinylpyrrolidone ם P partial (pressure); peta; of [H ]10 (povidone) phosphorus, phosphoric Pharm D Doctor of q [L.] quisque, every (residue); plasma Pharmacy (Pharmaciae Q coulomb; volume of blood (concentration); pressure; Doctor) flow para (obstetric history) PhD Doctor of Philosophy Qco microliters CO2 given 32 2 P phosphorus-32 (Philosophiae Doctor) off per milligram of PA Physician Assistant; PhD [L.] Philosophiae dryweight of tissue per posteroanterior Doctor, Doctor of hour Pa pascal Philosophy ⅜\ q.d. [L.] quaque die, every PA Physician’s Assistant; PhG [L.] Pharmacopoeia day posteroanterior; pulmonary Germanica, German q.i.d. [L.] quater in die, four artery Pharmacopeia times a day Pb [L.] plumbum, lead PhG Graduate in QNS quantity not sufficient p.c. [L.] post cibum, after a Pharmacy ⅜\ q.o.d. every other day meal PHN Public Health Nurse; q.s. [L.] quantum satis,as PCB polychlorinated postherpetic neuralgia much as is enough; [L.] biphenyl PICC peripherally inserted quantum sufficiat,asmuch Pco2 partial pressure of central catheter as may suffice; quantity carbon dioxide PK pyruvate kinase sufficient PCP phencyclidine; plasma PKU phenylketonuria r racemic; roentgen cell pneumonia pm picometer (Pneumocystic carinii Pm promethium RA rheumatoid arthritis pneumonia); primary care PM post mortem RAD reactive airways provider PMI point of maximum disease PCR polymerase chain intensity rbc red blood cell; red blood reaction PMN polymorphonuclear (cell) count PCWP pulmonary capillary (leukocyte) RBC red blood cell; red wedge pressure PN Practical Nurse blood (cell) count Pd palladium PND paroxysmal nocturnal RBF renal blood flow PDA patent ductus dyspnea; postnasal drip RCM right costal margin arteriosus; posterior PO [L.] per os, by mouth RCT root canal treatment descending artery PPD purified protein RD reaction of degeneration; PDGF platelet derived derivative (of tuberculin) reaction of denervation; growth factor ppm parts per million Registered Dietitian PDR Physicians’Desk PPV positive pressure RDA recommended daily Reference ventilation allowance

The forbidden symbol (⅜\ ) appears opposite abbreviations prohibited by the Joint Commission on Accreditation of Healthcare Organizations (JCAHO). COMMON MEDICAL/DENTAL ABBREVIATIONS AND ACRONYMS

RDH Registered Dental S [L.] sinister, left; SPF sun protection (or Hygienist saturation of hemoglobin protective) factor RDS respiratory distress (percentage of) (followed spp. species (plural) syndrome by subscript o2 or co2); SQ subcutaneous RE right ear; right eye siemens; spheric; spheric ssp. subspecies rem roentgen equivalent, (lens); sulfur; Svedberg SSRI selective serotonin man (unit) reuptake inhibitor REM rapid eye movement SA sinuatrial stat; STAT [L.] statim, (sleep); reticular S-A sinuatrial immediately, at once erythematous mucinosis SAD seasonal affective STD sexually transmitted rep roentgen equivalent, disorder disease physical S and P Scale and Polish STEL short-term exposure RF release factor; (periodontics) limit rheumatoid factor SARS severe acute STI sexually transmitted Rh Rhesus (Rh blood respiratory syndrome infection group); rhodium SBE subacute bacterial STM short-term memory RIA radioimmunoassay endocarditis STPD standard RN Registered Nurse sc subcutaneous(ly) temperature (0Њ C) and RNA Registered Nurse ScD Doctor of Science pressure (760 mmHg Anesthetist; ribonucleic SCID severe combined absolute), dry acid immunodeficiency STS serologic test for RNC Registered Nurse, SD standard deviation; syphilis Certified streptodornase Sv, SV sievert (unit) RNP Registered Nurse SGOT serum SVT supraventricular Practitioner glutamicoxaloacetic tachycardia R/O rule out transaminase (aspartate t metric ton ROM range of motion aminotransferase) t temperature (Celsius); ROS review of systems SGPT serum glutamic- tritium RP Registered Pharmacist pyruvic transaminase T temperature, absolute RPD Removable Partial (alanine aminotransferase) (Kelvin); tension Denture SH serum hepatitis (intraocular); tera; tesla; RPh Registered Pharmacist SI [French] Syste`me tetanus (toxoid); tidal rpm revolutions per International d’Unite´s; (volume) (SUBSCRIPT); minute International System of tocopherol; transverse RPR rapid plasma reagin Units (tubule); tritium; tumor (test) SID source-to-image (- (antigen) RQ respiratory quotient receptor) distance T absolute temperature RT Radiologic SIDS sudden infant death (Kelvin) Technologist; Registered syndrome T&Ctype and Technologist; sig. [L.] signa, affix a label, crossmatch Respiratory Therapist inscribe Ta tantalum RVEF right ventricular SIRD source-to- TA Terminologia ejection fraction imagereceptor distance Anatomica RVH right ventricular SL sublingual(ly) tab tablet hypertrophy SLE systemic lupus TB tuberculosis ␴ sigma; reflection erythematosus TBV total blood volume coefficient; standard Sn [L.] stannum, tin Tc technetium deviation; 1 millisecond SN Student Nurse 99mTc technetium 99m (0.001 sec) SOB short(ness) of breath TCA tricarboxylic acid; s [L.] semis, half; steady sol. solution trichloracetic acid state (SUBSCRIPT); [L.] soln. solution TEN toxic epidermal sinister, left SP Speech Pathologist necrolysis s sine, without sp. gr. specific gravity TFCI transient focal s/s signs and symptoms sp. species cerebral ischemia COMMON MEDICAL/DENTAL ABBREVIATIONS AND ACRONYMS

THC tetrahydrocannabinol tr. tincture VLDL very low density Ti titanium TSH thyroid stimulating lipoprotein TIA transient ischemic hormone Vmax maximal velocity attack TSS toxic shock syndrome VN Visiting Nurse, TIBC total iron-binding TTP thrombotic Vocational Nurse capacity thrombocytopenic VO vocal order t.i.d. [L.] terindie, three purpura VS vital signs; volumetric times a day TU toxic unit, toxin unit solution tinct. tincture Tx treatment VT tidal volume ⅜\ t.i.w. three times a week Tyr tyrosine (and its VZIG varicella-zoster Tl thallium radicals) ⅜\ U unit immune globulin TMJ temporomandibular URI upper respiratory W watt; [German] Wolfram, joint infection tungsten TNF tumor necrosis factor US ultrasound WD well-developed TNM tumor, node, USAN United States WDLL well-differentiated metastasis (tumor staging) Adopted Names lymphocytic (or t-PA, TPA tissue (Council) lymphatic) lymphoma plasminogen activator USP United States WHO World Health TPHA Treponema pallidum Pharmacopeia Organization hemagglutination (test) USPHS United States WN well nourished TPI Treponema pallidum Public Health Service Y yttrium immobilization (test) UTI urinary tract infection YAG yttrium- TPN total parenteral VDRL Venereal Disease aluminumgarnet (laser) nutrition Research Laboratory (test) Yb ytterbium TPR temperature, pulse, and VHDL very high density Zn zinc respirations lipoprotein Zr zirconium

The forbidden symbol (⅜\ ) appears opposite abbreviations prohibited by the Joint Commission on Accreditation of Healthcare Organizations (JCAHO).