ACS|ACUTE CORONARY SYNDROME
ADHD|ACUTE DEFICIT HYPERACTIVITY DISORDER
AGE|ACUTE GASTROENTERITIS
AGN|ACUTE GLUMERULONEPHRITIS
AKI|ACUTE KIDNEY INJURY
AF|ATRIAL FIBRILLATION
AIDS|ACQUIRED IMMUNE DEFICIENCY SYNDROME
ALD|ALCOHOLIC LIVER DISEASE
ALRTI|ACUTE LOWER RESPIRATORY TRACT INFECTION
ALRI|ACUTE LOWER RESPIRATORY INFECTION
AOM|ACUTE OTITIS MEDIA
ARDS|ACUTE RESPIRATORY DISTRESS SYNDROME
ARI|ACUTE RESPIRATORY INFECTION
ARTI|ACUTE RESPIRATORY TRACT INFECTION
ASCVD|ARTERIOSCLEROTIC CARDIOVASCULAR DISEASE
ASCVD|ATHEROSCLEROTIC CARDIOVASCULAR DISEASE
ASHD|ARTERIOSCLEROTIC HEART DIDEASE
ASHD|ATHEROSCLEROTIC HEART DISEASE
AMI|ACUTE MYOCARDIAL INFARCTION
APID|ACUTE PELVIC INFLAMMATORY DISEASE
APD|ACID PEPTIC DISEASE
ARF|ACUTE RESPIRATORY FAILURE
ARF|ACUTE RENAL FAILURE
ATP|ACUTE TONSILLOPHARYNGITIS
AURI|ACUTE UPPER RESPIRATORY TRACT INFECTION
BA|BRONCHIAL ASTHMA
BAIAE|BRONCHIAL ASTHMA IN ACUTE EXACERBATION
BAIAE IN AE|BRONCHIAL ASTHMA IN ACUTE EXACERBATION IN ACUTE EXACERBATION
BPH|BENIHN PROSTATIC HYPERPLASIA
BPPV|BENIGN PAROXYSMAL POSITIONAL VERTIGO
CAD|CORNONARY ARTERY DISEASE
CAP|COMMUNITY ACQUIRED PNEUMONIA
CHD|CONGENITAL HEART DISEASE
CHD|CORONARY HEART DISEASE
CHF|CONGESTIVE HEART FAILURE
COLD|CHRONIC OBSTRUCTIVE LUNG DISEASE
COPD|CHRONIC OBSTRUCTIVE PULMONARY DISEASE
COPD IN AE|CHRONIC OBSTRUCTIVE PULMONARY DISEASE IN ACUTE EXACERBATION
CRF|CHRONIC RENAL FAILURE
CTS|CARPAL TUNNEL SYNDROME
CVA|CEREBROVASCULAR ACCIDENT
CVD|CARDIOVASCULAR DISEASE
DF|DENGUE FEVER
DFS|DENGUE FEVER SYNDROME
DHF|DENGUE HEMORRHAGIC FEVER
DI|DIABETES INSIPIDUS
DKD|DIABETIC KIDNEY DISEASE
DM|DIABETES MELLITUS
DUB|DYSFUNCTIONAL UTERINE BLEEDING
DVT|DEEP VEIN THROMBOSIS
ESRD|END STAGE RENAL DISEASE
FX|FRACTURE
GERD|GASTROESOPHAGEAL REFLUX DISEASE
GIB|GASTROINTESTINAL BLEEDING
GUTI|GENITO URINARY TRACT INFECTION
HAP|HOSPITAL ACQUIRED PNEUMONIA
HCVD|HYPERTENSIVE CARDIOVASCULAR DISEASE
HPN|HYPERTENSION
HTN|HYPERTENSION
IBD|INFLAMMATORY BOWEL DISEASE
IBS|IRRITABLE BOWEL SYNDROME
IDDM|INSULIN DEPENDENT DIABETES MELLITUS 
IHD|ISCHEMIC HEART DISEASE
ISHD|ISCHEMIC HEART DISEASE
LBBB|LEFT BUNDLE BRANCH BLOCK
LGIB|LOWER GASTROINTESTINAL BLEEDING
LPRD|LARYNGOPHARYNGEAL REFLUX DISEASE
LRI|LOWER RESPIRATORY INFECTION
LRTI|LOWER RESPIRATORY TRACT INFECTION
MDS|MYELODYSPLASTIC SYNDROME
MI|MYOCARDIAL INFARCTION
MPI|MULTIPLE PHYSICAL INJURY
MPS|MYOFASCIAL PAIN SYNDROME
MR|MITRAL REGURGITATION
MVA|MOTOR VEHICULAR DISEASE
MVP|MITRAL VALVE PROLAPSE
NAFLD|NON ALCOHOLIC FATTY LIVER DISEASE
NIDDM|NON INSULIN DEPENDENT DIABETES MELLITUS
NSTEMI|NON ST ELEVATION MYOCARDIAL INFARCTION
NTD|NEURAL TUBE DEFECT
NTDs|NEURAL TUBE DEFECTS
OA|OSTEOARTHRITIS
OSA|OBSTRUCTIVE SLEEP APNEA
PCAP|PEDIATRIC COMMUNITY ACQUIRED PNEUMONIA
PCOS|POLYCYSTIC OVARIAN SYNDROME
PID|PELVIC INFLAMMATORY DISEASE
PMB|POST MENOPAUSAL BLEEDING
PMS|PRE MENSTRUAL SYNDROME
PMS|POST MENOPAUSAL SYNDROME
PTB|PULMONARY TUBERCULOSIS
PU|PREGNANCY UTERINE
PUD|PEPTIC ULCER DISEASE
RBBB|RIGHT BUNDLE BRANCH BLOCJ
RDS|RESPIRATORY DISTRESS SYNDROME
RHD|RHEUMATIC HEART DISEASE
RTI|RESPIRATORY TRACT INFECTION
SARS|SEVERE ACUTE RESPIRATORY SYNDROME
SIDS|SUDDEN INFANT DEATH SYNDROME
SLE|SYSTEMIC LUPUS ERYTHEMATOSUS
SLE|SYSTEMIC LUPUS ERYTHEMATOUS
STD|SEXUALLY TRANSMITTED DISEASE
SVI|SYSTEMIC VIRAL INFECTION
TB|TUBERCULOSIS
TIA|TRANSIENT ISCHEMIC ATTACK
UGIB|UPPER GASTROINTESTINAL BLEEDING
URI|UPPER RESPIRATORY INFECTION
URTI|UPPER RESPIRATORY TRACT INFECTION
UTI|URINARY TRACT INFECTION
VHD|VALVULAR HEART DISEASE
AKA|ABOVE KNEE AMPUTATION
BKA|BELOW KNEE AMPUTATION
BSO|BILATERAL SALPHINGO OOPHORECTOMY
D&C|DILATATION AND CURETTAGE
DC|DIAGNOSTIC CURETTAGE
I&D|INCISION AND DRAINAGE
NSD|NORMAL SPONTANEOUS DELIVERY
NSBD|NORMAL SPONTANEOUS BREECH DELIVERY
NSVD|NORMAL SPONTANEOUS VERTEX DELIVERY
LSO|LEFT SALPHINGO OOPHORECTOMY
LTCS|LOW TRANSVERSE CESAREAN SECTION
RSO|RIGHT SALPHINGO OOPHORECTOMY
TAHBSO|TOTAL ABDOMINAL HYSTERECTOMY BILATERAL SALPHINGO OOPHORECTOMY
TAHRSO|TOTAL ABDOMINAL HYSTERECTOMY RIGHT SALPHINGO OOPHORECTOMY
TAHLSO|TOTAL ABDOMINAL HYSTERECTOMY LEFT SALPHINGO OOPHORECTOMY

A2|aortic second sound
aa|of each; arteries
AAA|abdominal aortic aneurysm
abd|abdominal/abdomen
ABG|arterial blood gas
ABI|ankle-brachial index
ABO|three basic blood groups
AC|adrenal cortex; air conduction; alternating current; axiocervical|
a.c., ac|before a meal
acc.|accommodation
A/CA|accommodative/convergence accommodation ratio
ACE|angiotensin-converting enzyme
ACh|acetylcholine
AChE|acetylcholinesterase
AChR|acetylcholine receptor
ACLS|advanced cardiac life support
ACTH|adrenocorticotropic hormone
AD|advance directive
ad|to; up to
ADH|antidiuretic hormone
ADHD|attention deficit-hyperactivity disorder
ADL, ADLs|activities of daily living
ad lib.|freely; as desired
admov.|apply
ad sat.|to saturation
AED|antiepileptic drug
AF|atrial fibrillation
AFB|acid-fast bacillus
AFP|alpha-fetoprotein
A/G; A-G ratio|albumin/globulin ratio
Ag|silver; antigen
AGC|atypical glandular cells
AgNO3|silver nitrate
ah|hypermetropic astigmatism
AHF|antihemophilic factor
AI|aortic incompetence; aortic insufficiency
AICD|automatic implantable cardiac defibrillator
AIDS|acquired immunodeficiency syndrome
AK|above the knee
Al|aluminum
Alb|albumin
ALL|acute lymphocytic leukemia
ALP|alkaline phosphatase
ALS|amyotrophic lateral sclerosis
ALT|alanine aminotransferase
alt. dieb.|every other day
alt. hor.|every other hour
alt. noc.|every other night
AM|morning
Am|mixed astigmatism
a.m.a.|against medical advice
AMI|acute myocardial infarction
AML|acute myelogenous (myeloblastic) leukemia
amp|ampule; amputation
ANA|antinuclear antibody
anat|anatomy or anatomic
ANNA|anti-neuronal nuclear antibody
ANP|atrial natriuretic peptide
ant.|anterior
anti-CCP|anticyclic citrullinated peptide
Ao.|aorta
A-P|anterior-posterior
A&P|auscultation and percussion
ap|before dinner
APAP|acetaminophen
aPTT|activated partial thromboplastin
AQ, aq|water
aq. dest.|distilled water
aq. frig.|cold water
ARC|AIDS-related complex
ARDS|acute respiratory distress syndrome
ARMD|age-related macular degeneration
AS|ankylosing spondylitis; aortic stenosis; auris sinistra (left ear)
As.|astigmatism
ASA|acetylsalicylic acid
ASC|atypical squamous cells
asc.|ascending
ASCA|anti-Saccharomyces cerevisiae|antibody
ASC-US|atypical squamous cells of undetermined significance
ASCVD|atherosclerotic cardiovascular disease
ASD|atrial septal defect
AsH|hypermetropic astigmatism
AsM|myopic astigmatism
AST|aspartate aminotransferase
Ast|astigmatism
at. wt.|atomic weight
Au|gold
A-V; AV; A/V|arteriovenous; atrioventricular
av.|avoirdupois
AVM|arteriovenous malformation
AVP|arginine vasopressin
B|boron; bacillus
Ba|barium
BAC|blood alcohol concentration
BBB|blood-brain barrier; bundle branch block
BBT|basal body temperature
BCG|bacille Calmette-Guérin
BCP|birth control pills
BD|Buerger disease
BE|barium enema
Be|beryllium
BHS|beta-hemolytic streptococci
Bi|bismuth
b.|bone
bib.|drink
b.i.d., bid|twice a day
b.i.n.|twice a night
bipap|bilevel positive airway pressure
BK|below the knee
BLS|basic life support
BM|bowel movement
BMI|body mass index
BMR|basal metabolic rate
BMS|bone marrow suppression
BMT|bone marrow transplantation
BNP|brain natriuretic peptide
bol.|pill
BP|blood pressure
BPH|benign prostatic hyperplasia
bpm|beats per minute
BRM|biologic response modifier
BROW|barley, rye, oats, and wheat
BSA|body surface area
BSE|breast self-examination
BUN|blood urea nitrogen
BW|birth weight; body weight
Bx|biopsy
C|Calorie (kilocalorie); Celsius
c|calorie (small calorie)
c|with
CA|coronary artery
ca.|about; approximately; cancer
CABG|coronary artery bypass graft
CaCO3|calcium carbonate
CAD|coronary artery disease
CAH|chronic active hepatitis
Cal|large calorie
CAP|let (the patient) take
cap.|capsule
C&S|culture and sensitivity
cath|catheter
CBC|complete blood count
CBI|continuous bladder irrigation
CBRNE|chemical, biological, radiological, nuclear, and explosive agents
CBT|cognitive behavioral therapy
CC|chief complaint
cc|cubic centimeter
CCl|4|carbon tetrachloride
CCU|coronary care unit; critical care unit
CD4|T-helper cells
CD8|cytotoxic cells
CDC|Centers for Disease Control and Prevention
CEA|carcinoembryonic antigen
CF|cystic fibrosis; Christmas factor
CFTR|cystic fibrosis transmembrane regulator
cg|centigram
CHD|congenital heart disease; coronary heart disease
ChE|cholinesterase
CHF|congestive heart failure
CI|cardiac index
Ci|curie
CIN|cervical intraepithelial neoplasia
CIS|carcinoma in situ
CK|creatine kinase
CK-MB|serum creatine kinase, myocardial-bound
Cl|chlorine
CLL|chronic lymphocytic leukemia
cm|centimeter
c.m.s.|to be taken tomorrow morning
CMT|certified medication technician
CMV|cytomegalovirus
c.n.|tomorrow night
CNS|central nervous system
c.n.s.|to be taken tomorrow night
CO|carbon monoxide; cardiac output
CO2|carbon dioxide
Co|cobalt
c/o|complains of
COLD|chronic obstructive lung disease
comp.|compound; compounded of
COMT|catechol-O-methyltransferase
COPD|chronic obstructive pulmonary disease
COX-2|cyclooxygenase 2 inhibitors
CP|cerebral palsy; cleft palate
CPAP|continuous positive airway pressure
CPD|cephalopelvic disproportion
CPHSS|Cincinnati Prehospital Stroke Scale
CPK|creatine phosphokinase
CPM|continuous passive motion
CPR|cardiopulmonary resuscitation
CR|conditioned reflex; controlled release; crown-rump length
CRP|c. reactive protein
CS|cardiogenic shock; cesarean section; culture and sensitivity
CSF|cerebrospinal fluid; colony-stimulating factor
CT|computed/computerized tomography
Cu|copper
CV|cardiovascular
CVA|cardiovascular accident; cerebrovascular accident; costovertebral angle
CVC|central venous catheter
CVP|central venous pressure
CVS|chorionic villi sampling
CXR|chest x-ray
D|diopter; dose
D5/0.9 NaCl|5% dextrose and normal saline solution (0.9% NaCl)
D5/½ /NS|5% dextrose and half-normal saline solution (0.45% NaCl)
D5W|5% dextrose in water
d|density; right
/d|per day
D and C|dilatation and curettage
DBP|diastolic blood pressure
DC|direct current; doctor of chiropractic
dc|discontinue
Derm|dermatology
det.|let it be given
DEXA|dual-energy x-ray absorptiometry
DFV|Doppler flow velocimetry
DHT|dihydrotestosterone
DI|diabetes insipidus
DIC|disseminated intravascular coagulation
dieb. alt.|every other day
dieb. tert.|every third day
dil.|dilute; diluted
dim.|halved
DISIDA (scan)|diisopropyl iminodiacetic acid (cholescintigraphy)
DJD|degenerative joint disease
DKA|diabetic ketoacidosis
dL|deciliter
DM|diabetes mellitus
DMARD|disease-modulating antirheumatic drug
DNA|deoxyribonucleic acid
DNH|do not hospitalize
DNR|do not resuscitate
DOA|dead on arrival
DOB|date of birth
DOE|dyspnea on exertion
DPat|diphtheria-acellular pertussis tetanus (vaccine)
DPT|diphtheria-pertussis-tetanus (vaccine)

DRE|digital rectal examination
DTR|deep tendon reflex(es)
DTs|delirium tremens
dur. dolor|while pain lasts
DVT|deep vein thrombosis
Dx|diagnosis
D5W|dextrose 5% in water
DWI|driving while intoxicated
EBV|Epstein-Barr virus
ECF|extended care facility; extracellular fluid
ECG|electrocardiogram, electrocardiograph
ECHO|echocardiography
ECMO|extracorporeal membrane oxygenation
ECT|electroconvulsive therapy
ED|emergency department; effective dose; erythema dose; erectile dysfunction
EDD|estimated date of delivery (formerly EDC: estimated date of confinement)
EEG|electroencephalogram
EENT|eye, ear, nose, and throat
EF|ejection fraction
EGD|esophagogastroduodenoscopy
EIA|enzyme immunosorbent assay
EKG|electrocardiogram; electrocardiograph
ELISA|enzyme-linked immunosorbent assay
elix.|elixir
Em|emmetropia
EMA-IgA|immunoglobulin A antiendomysial
EMG|electromyogram, electromyography
Endo|endocrine
ENT|ear, nose, and throat
EOM|extraocular muscles
EP|extrapyramidal
EPS|extrapyramidal symptoms
ER|Emergency Room, extended-release
ERCP|endoscopic retrograde cholangiopancreatography
ESR|erythrocyte sedimentation rate
ESRD|end-stage renal disease
EST|electroshock therapy
ESWL|extracorporeal shock wave lithotripsy
ET-1|endothelin-1
ETOH, EtOH|ethyl alcohol
ext.|extensor; external
F|Fahrenheit
f|female
FA|fatty acid
F and E|fluid and electrolyte
FAP|familial adenomatous polyposis
FBS|fasting blood sugar
FD|fatal dose; focal distance
Fe|iron
FEV|forced expiratory volume
FFP|fresh frozen plasma
FHT|fetal heart tone
FISH|fluorescence in situ hybridization
fl.|flexor
Fld|fluid
FP|family practice; family practitioner
FSH|follicle-stimulating hormone
FTT|failure to thrive
FUO|fever of unknown origin
G, g, gm|gram
GABA|gamma-aminobutyric acid
GABAB|gamma-aminobutyric acid type B
GB|gallbladder; Guillain-Barré
GC|gonococcus or gonorrheal
GDM|gestational diabetes mellitus
GDS|Geriatric Depression Scale
GERD|gastroesophageal reflux disease
GFR|glomerular filtration rate
GGT|gamma-glutamyl transferase
GH|growth hormone
GI|gastrointestinal
GnRH|gonadotropin-releasing hormone
G6PD|glucose-6-phosphate dehydrogenase
GSW|gunshot wound
GTT|glucose tolerance test
Gtt, gtt|drops
GU|genitourinary
GVHD|graft-versus-host disease
GYN|gynecology
h, hr|hour
H&H|hematocrit and hemoglobin
H1N1|hemagglutinin type 1 and neuraminidase type 1
H2|histamine 2
HAART|highly active antiretroviral therapy
HAV|hepatitis A virus
HBV|hepatitis B virus
HCG|human chorionic gonadotropin
HCT, Hct|hematocrit
HCV|hepatitis C virus
HD|hearing distance
HDL|high-density lipoprotein
HDV|hepatitis D
HEENT|head, eye, ear, nose, and throat
HELLP|hemolysis, elevated liver enzymes, low platelets
HEPA|high-efficiency particulate air
HER2|human EGF (epidermal growth factor) receptor 2
HEV|hepatitis E
HF|heart failure
Hg|mercury
hgb|hemoglobin
HGSIL|high-grade squamous intraepithelial lesion
Hib|Haemophilus influenzae|type B
HIDA|hepatobiliary iminodiacetic acid (cholescintigraphy)
HIV|human immunodeficiency virus
HLA|human leukocyteantigen
HOB|head of bed
H2O|water
H2O2|hydrogen peroxide
hor. decub.|bedtime
hor. som, h.s.|bedtime
HPI|history of present illness
HPV|human papillomavirus
HR|heart rate
HRT|hormone replacement therapy
HSIL|high-grade squamous intraepithelial lesion
HSV|herpes simplex virus
HTLV-III|human T lymphotropic virus type III
HTN|hypertension
hx, Hx|history
Hy|hyperopia
I&O|intake and output
IBW|ideal body weight
IC|inspiratory capacity
ICD|implantable cardioverter defibrillator
ICP|intracranial pressure
ICS|intercostal space
ICSH|interstitial cell-stimulating hormone
ICU|intensive care unit
Id.|the same
IDDM|insulin-dependent diabetes mellitus
IDM|infants of diabetic mothers
Ig|immunoglobulin
IgE|immunoglobulin E
IgG|immunoglobulin G
IL-1|interleukin 1
IL-8|interleukin 8
IM|intramuscular
in d.|daily
INF|interferon
inf.|inferior
inj.|injection
int.|internal
IOP|intraocular pressure
IPPB|intermittent positive pressure breathing
IUCD|intrauterine contraceptive device
IUD|intrauterine device
IUFD|intrauterine fetal death
IV|intravenous
IVP|intravenous pyelogram
JRA|juvenile rheumatoid arthritis
jt.|joint
K|potassium
kg|kilogram
KI|potassium iodine
KOH|potassium hydroxide
KS|Kaposi sarcoma
KUB|kidney, ureter, and bladder
KVO|keep vein open
L|liter
L&D|labor and delivery
lab|laboratory
lat|lateral
lb|pound
LBW|low birth weight
LD50|lethal dose, median
LDH|lactate dehydrogenase
LDL|low-density lipoprotein
LE|lower extremity; lupus erythematosus
LEEP|loop electrosurgical excision procedure
LFT|liver function test
LGA|large for gestational age
LH|luteinizing hormone
Li|lithium
lig|ligament
liq.|liquid; fluid
LLE|left lower extremity
LLL|left lower lobe
LLQ|left lower quadrant
lmp|last menstrual period
LOC|level/loss of consciousness
LP|lumbar puncture
LR|lactated Ringer (solution)
LSIL|low-grade squamous epithelial lesion
LTD|lowest tolerated dose
LUE|left upper extremity
LUL|left upper lobe
LUQ|left upper quadrant
LV|left ventricle
LVAD|left ventricular assist device
LVH|left ventricular hypertrophy
MAP|mean arterial pressure
MAT|Miller Analogies Test
MBD|minimal brain dysfunction
mc; mCi|millicurie
mcg|microgram
MCH|mean corpuscular hemoglobin
MCHC|mean corpuscular hemoglobin concentration
MCV|mean corpuscular volume
MD|muscular dystrophy
MDI|metered-dose inhaler
MED|minimum effective dose
med|medial
MELD|Model for End-Stage Liver Disease
µEq|microequivalent
mEq|milliequivalent
mEq/L|milliequivalent per liter
ME ratio|myeloid/erythroid ratio
MG|myasthenia gravis
µg|microgram
mg|milligram
MI|myocardial infarction
MID|minimum infective dose
mist.|a mixture
ml|milliliter
MLD|minimum lethal dose
MLF|medial longitudinal fasciculus
MM|mucous membrane; multiple myeloma
mm|millimeter
MMR|measles-mumps-rubella (vaccine)
MMSE|Mini-Mental Status Examination
mor. dict.|as directed
MRA|magnetic resonance angiography
MRgFUS|MR-guided focused ultrasound surgery
MRI|magnetic resonance imaging
MS|mitral stenosis; multiple sclerosis
MV|mitral valve
MVA|motor vehicle accident
My|myopia
n|nerve
N/A|not applicable
NAA|nucleic acid amplification
NAD|no acute distress
nCi|nanocurie
NG, ng|nasogastric
NGT|nasogastric tube
NICU|neonatal intensive care unit
NIDDM|noninsulin-dependent diabetes mellitus
NKA|no known allergies
NMDA|N-methyl D-aspartate
NMJ|neuromuscular junction
NMS|neuroleptic malignant syndrome
nn|nerves
noct.|in the night
noct. maneq.|night and morning
non rep; n.r.|do not repeat
NPN|nonprotein nitrogen
NPO; n.p.o.|nothing by mouth
NRC|normal retinal correspondence
NS|normal saline
NSAID|nonsteroidal anti-inflammatory drug
NSR|normal sinus rhythm
N&V, N/V|nausea and vomiting
O2|oxygen
OB|obstetrics
OC|oral contraceptive
OCD|obsessive-compulsive disorder
O.D.|right eye
om. mane vel noc.|every morning or night
omn. hor.|every hour
omn. noct.|every night
OmPC|outer membrane porin C
OOB|out of bed
OPD|outpatient department
OR|operating room
ORIF|open reduction with/and internal fixation
O.S.|left eye
OU|each eye
oz|ounce
p|after
P2|pulmonic second sound
P-A; PA; pa|placenta abruption; posteroanterior; pulmonary artery
PABA|para-aminobenzoic acid (vitamin B10)
Paco2|partial pressure of carbon dioxide in alveolar gas
PACU|postanesthesia care unit
PAD|peripheral arterial disease
PALS|pediatric advanced life support
P-ANCA|perinuclear antineutrophil cytoplasmic antibody
PAO|2|alveolar oxygen partial pressure
Pap, Pap test|Papanicolaou smear
part. vic|in divided doses
PBI|protein-bound iodine
p.c.|after meals
PCA|patient-controlled analgesia
Pco|2|carbon dioxide pressure
PCOS|polycystic ovarian syndrome
PCP|Pneumocystis carinii|pneumonia; 
PCWP|pulmonary capillary wedge pressure
PD|interpupillary distance; Parkinson disease; peritoneal dialysis
pd|prism diopter; pupillary distance
PDA|patent ductus arteriosus
PE|physical examination; pulmonary embolism
PEEP|positive end expiratory pressure
PEFR|peak expiratory flow rate
PEG|percutaneous endoscopic gastrostomy
per|through or by
PERRLA|pupils equal, regular, react to light and accommodation
PET|positron emission tomography
PFT|pulmonary function test
pH|hydrogen ion concentration
PICC|peripherally inserted central catheter
PID|pelvic inflammatory disease
PIH|pregnancy-induced hypertension
pil.|pill
PIP|proximal interphalangeal
PIPDA (scan)|99mTc-para-isopropylacetanilido-iminodiaacetic acid (cholescintigraphy)
PKU|phenylketonuria
PMH|past medical history
PMI|point of maximal impulse
PMN|polymorphonuclear neutrophil leukocytes
PMS|premenstrual syndrome
PND|paroxysmal nocturnal dyspnea
PNH|paroxysmal nocturnal hemoglobinuria
PNS|peripheral nervous system
PO; p.o.|orally
post.|posterior
PP|placenta previa|
PPD|purified protein derivative (TB test)
p.r.|through the rectum
PRBCs|packed red blood cells
p.r.n.|as needed
pro time/PT|prothrombin time
PSA|prostate-specific antigen
PSV|prostate-specific antigen
PT|prothrombin time; physical therapy
PTT|partial thromboplastin time
PUBS|percutaneous umbilical blood sampling
p.v.|through the vagina
PVC|premature ventricular contraction
PVR|peripheral vascular resistance
q|every
q.d.†|every day
q.h.|every hour
q.2h.|every 2 hours
q.3h.|every 3 hours
q.4h.|every 4 hours
q.i.d.|a|four times a day
q.l.|as much as wanted
qns|quantity not sufficient
q.o.d.|a|every other day
q.p.|as much as desired
q.s.|as much as needed
qt|quart
RA|rheumatoid arthritis
rad|radiation absorbed dose
RAI|radioactive iodine
RAIU|radioactive iodine uptake
RBC|red blood cell; red blood count
RD|Raynaud disease
RDS|respiratory distress syndrome
REM|rapid eye movement
RF|rheumatoid factor
RFT|renal function test
RHD|rheumatic heart disease
RLE|right lower extremity
RLL|right lower lobe
RLQ|right lower quadrant
RML|right middle lobe of lung
RNA|ribonucleic acid
R/O|rule out
ROM|range of motion
ROS|review of systems
RPM|revolutions per minute
RQ|respiratory quotient
RR|recovery room; respiratory rate
RSV|respiratory syncytial virus
RT|radiation therapy; respiratory therapy
R/T|related to
RUE|right upper extremity
RUL|right upper lobe
RUQ|right upper quadrant
SAD|seasonal affective disorder
SARS|severe acute respiratory syndrome
SB|small bowel|
SBP|systolic blood pressure
SC, sc, s.c.|subcutaneous(ly)
SCI|spinal cord injury
SDAT|senile dementia of the Alzheimer type
semih.|half an hour
SERM|selective estrogen receptor modulator
SGA|small for gestational age
SIADH|syndrome of inappropriate diuretic hormone
SIDS|sudden infant death syndrome
SJS|Stevens-Johnson syndrome
SLE|systemic lupus erythematosus
SNRI|serotonin and norepinephrine reuptake inhibitor
SNS|sympathetic nervous system
SOB|shortness of breath
S/P|status post
SPECT|single-photon emission computed tomography
s.q.|subcutaneous(ly)
ss|a half
SSRI|selective serotonin reuptake inhibitor
SSS|sick sinus syndrome
st.|let it/them stand
Staph|Staphylococcus|
stat.|immediately
STD|sexually transmitted disease
Strep|Streptococcus|
STS|serologic test for syphilis
STU|skin test unit
sup.|superior
supf.|superficial
SV|stroke volume; supraventricular
SVC|superior vena cava
Sx|symptoms
syr.|syrup
T|temperature
T3|triiodothyronine
T4|tetraiodothyronine; thyroxine
T6|thoracic nerve pair 6
TA|toxin-antitoxin
T&A|tonsillectomy and adenoidectomy
TAH|total abdominal hysterectomy
TAT|thematic apperception test
T.A.T.|toxin-antitoxin
TB| tuberculosis 
t.d.s.|to be taken three times daily
TEE|transesophageal echocardiogram
TEN|toxic epidermal necrolysis
TENS|transcutaneous electrical nerve stimulation
TG|thyroglobulin
THR|total hip replacement
TIA|transient ischemic attack
t.i.d.|three times a day
t.i.n.|three times a night
TKR|total knee replacement
TM|tympanic membrane
TMJ|temporomandibular joint
TN|trigeminal nerve
TNF|tumor necrosis factor
TNF-I|tumor necrosis factor inhibitor
TNF-a|tumor necrosis factor alpha
TNM|tumor-node-metastasis
TNT|trinitrotoluene
TNTM|too numerous to mention
top.|topically
TPI|Treponema pallidum|immobilization test for syphilis
TPN|total parenteral nutrition
TPO|thyroid peroxidase
TPR|temperature, pulse, and respiration
TRAP criteria|tremor, rigidity, akinesia or postural instablity bradykinesia, and postural instability
Treg|regulatory T cell
TSD|time since death
TSE|testicular self-examination
TSH|thyroid-stimulating hormone
TT|tetanus toxoid
tTG|antitransglutaminase
TUMA|transurethral microwave antenna
TUR|transurethral resection
TURP|transurethral resection of the prostate
Tx|treatment
UA|urinalysis
UC|ulcerative colitis
UE|upper extremity
UHF|ultrahigh frequency
ult. praes.|the last ordered
Umb; umb|umbilicus
ung.|ointment
URI|upper respiratory infection
US|ultrasonic, ultrasound
ut. dict.|as directed
UTI|urinary tract infection
VC|vital capacity
VD|venereal disease
VF|ventricular fibrillation
Vf|field of vision
VLBW|very low birth weight
VLDL|very low density lipoprotein
vol.|volume
vol %|volume percent
VORB|verbal order read back
V/Q|ventilation/perfusion
VS| vital signs
VSD|ventricular septal defect
VT|ventricular tachycardia
VZIG|varicella zoster immune globulin
WBC|white blood cell; white blood count
WDWN|well-developed, well-nourished
WH|well-hydrated
WN|well-nourished
WNL|within normal limits
wt.|weight
yo|years old
yr|year