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Medical Abbreviations A thru Z

a b c d e f g h i j k l m
n o p q r s t u v w x y z

N – O – P – Q

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NAD no active disease
NAS no added salt
NCV nerve conduction velocity
NED no evidence of recurrent disease
ng nanogram
NG nasogastric
NIDDM non-insulin dependent diabetes mellitus
NKA no known allergies
NKDA no known drug allergies
NMR nuclear magnetic resonance
NPO nothing by mouth
NRM no regular medications
NSAID non-steroidal anti- inflammatory drugs
NSR normal sinus rhythm
NT nasotracheal


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OB obstetrics
OCG oral cholecystogram
OD overdose or right eye
OM otitis media
OOB out of bed
OOP out of plaster
OPV oral polio vaccine
OR operating room
OS left eye
OU both eyes

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P para
PA posteroanterior
PAC premature atrial contraction
PAO2 alveolar oxygen
PaO2 peripheral arterial oxygen content
PAP pulmonary artery pressure
PAT paroxysymal atrial tachycardia
P&PD percussion and postural drainage
PC after eating
PCWP pulmonary capillary wedge pressure
PDA patent ductus arteriosus
PDR physicians desk reference
PE pulmonary embolus, or physical exam or pleural effusion
PEEP positive end expiratory pressure
PFT pulmonary function tests
pg picogram
PI pulmonic insufficiency disease
PKU phenylketonuria
PMH previous medical history
PMI point of maximal impulse
PMN polymorphonuclear leukocyte (neutrophil)
PND paroxysmal nocturnal dyspnea
PO by mouth
POD post-op day
PP postprandial or pulsus paradoxus
PPD purified protein derivative
PR by rectum
PRBC packed red blood cells
PRN as needed
PS pulmonic stenosis
PT prothrombin time, or physical therapy
Pt patient
PTCA percutaneous transluminal coronary angioplasty
PTH parathyroid hormone
PTHC percutaneous transhepatic cholangiogram
PTT partial thromboplastin time
PUD peptic ulcer disease
PVC premature ventricular contraction
PVD peripheral vascular disease


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q every   (e.g.  q6h = every 6 hours)
qd every day
qh every hour
q4h, q6h…. every 4 hours, every 6 hours etc.
qid four times a day
QNS quantity not sufficient
qod every other day
Qs/Qt shunt fraction
Qt total cardiac output
N – O – P – Q