IBS
irritable bowel system
I & D
incision and drainage
I & O
intake and output
ICP
intracranial pressure
ICU
intensive care unit
IM
intramuscular
ing
inguinal
inj
injection
IPPB
intermittent positive pressure breathing
irrig
irrigation
IS
intercostal space
isol
isolation
IT
inhalation therapy
IUD
intrauterine device
IV
intravenous
IVF
in vitro fertilization
IVP
intravenous pyelogram