o.d.
right eye
o.s.
left eye
O.T.
occupational therapy
o.u.
both eyes
O2
oxygen
OBS
organic brain syndrome
O.D.
once a day
oint.
ointment
OOB
out of bed
OPD
out patient department
ophth.
ophthalmology
OR
operating room
ORIF
open reduction with internal fixation
ortho.
orthopedic
oz
ounce
P
pulse
p
after
p.c.
after meals
P.M.I
point of maximum impulse
p.o.
per orem/by mouth
P.P.
Post partum
P.P.D.
Purified Protein Derivative (tuberculin)
p.r.n.
whenever necessary
P.R.O.M.
premature rupture of membranes
P.T.A.
prior to admission
P.Z.I
protamine zinc insulin
PE
physical exam
PAC
premature atrial contractions
Pap
papanicolaou
PAP
Prostate Acid Phosphatase
PD
peritoneal dialysis
PDA
Patent Ductus Arteriosus
PEEP
positive end expiratory pressure
PERRLA
pupils equal, round and reactive to light and accommodation
pH.
pH Potential Hydrogen
PID
pelvic inflammatory disease
PKU
phenylketonuria
PO2
partial oxygen tension
PO4
phosphate
psych.
psychiatry
pt.
patient
PTH
parathyroid hormone
PTT
partial thromboplastin time
PUD
Peptic Ulcer Disease
Pb
lead
PBI
protein bound iodine
PCP
Pneumocystis carinii pneumonia
PVC
premature ventricular contraction
PZA
pyrazinamide