I & O
Intake and output
IADL
Instrumental activities of daily living
ICU
Intensive care unit
IDDM
Insulin dependent diabetes mellitus
IE
Initial evaluation
IFC
Interferential current
IM
Intramuscular
imp.
Impression
indep. or I
Independent
inf.
Inferior
inv.
Inversion
IR or int. rot.
Internal rotation
IRDS
Infant respiratory distress syndrome
IS
Incentive spirometer, incentive spirometry
IV
Intravenous