NDT
Neurodevelopmental Treatment
neg.
Negative
NG or ng
Nasogastric
NIDDM
Non-Insulin dependent diabetes mellitus
nn.
Nerve
NPO or npo
Nothing by mouth
NSR
Normal Sinus Rhythm
NWB
Non Weight Bearing
O
Objective
OA
Osteoarthritis
OB
Obstetrics
OBS
Organic brain syndrome
OOB
Out of Bed
O.P.
Outpatient
O.R.
Operating Room
ORIF
Open Reduction, Internal Fixation
OT
Occupational Therapist/Therapy
p with - over the top
After
P
Plan
P.A.
Physician’s Assistant
PA
Posterior/Anterior
PCL
Posterior Cruciate Ligament
PE
Pulmonary Embolus
PEEP
Positive end expiratory pressure