Table 3.

Most important 15 words (including nonstandard English words) (ranked by importance) for ICD-9 codes “570”

ICD-9: 570 (Acute liver failure)
Word	Description
liver	An organ that produces biochemicals necessary for digestion
Renal	Relating to the kidneys
Hepatorenal	A life-threatening medical condition that consists of rapid deterioration in kidney
Crrt	CRRT is a dialysis modality used to treat critically ill, hospitalized patients
Vasopressin	A hormone synthesized
Shock	Shock liver is a condition defined as an acute liver injury
Failure	Liver failure can occur gradually
Levophed	Injection
Ascites	Ascites is the abnormal buildup of fluid in the abdomen
Oliguric	A urine output
Pigtail	Pigtail drainage is used for liver abscess
Transplant	liver transplant is a surgical procedure
Rifaximin	Antibiotic
Cirrhosis	Cirrhosis is a late stage of scarring (fibrosis) of the liver
Hepatic	Relating to the liver.