MEDICAL ABBREVIATIONS AND SYMBOLS (CONT)
NSA
no significant abnormality
NSR
normal sinus rhythm
O
eye
OB
obstetrics
OBD
organic brain disease
OB-GYN
obstetrics and gynecology
OHD
organic heart disease
OL; OS
left eye
omn bih
every two hours
omn hor; oh
every hour
omn noct; on
every night
OPC
outpatient clinic
OPD
outpatient department
ophth
ophthalmology
OR
operating room
Orth
orthopedics
OS; OL
left eye
OT
occupational therapy
OU
each eye
P
phosphorus
P/3
proximal one-third (long bones)
p1, p2, etc.
para 1, para 2, etc.
PA
Physician's Assistant
P&A
percussion and auscultation
PAB, PABA
para-aminobenzoic acid
Pap test
Papanicolaou's test
Para
parous
path
pathology
MD0010
C-11