Obstruction
(ub-STRUK-shun)
A blockage in the GI tract that prevents the flow of liquids or solids.

Occult Bleeding
(uh-KULT)
Blood in stool that is not visible to the naked eye. May be a sign of disease such as diverticulosis or colorectal cancer.

Oesophageal Manometry

Oral Dissolution Therapy
(OR-ul dih-soh-LOO-shun theh-ruh-pee)
A method of dissolving cholesterol gallstones. The patient takes the oral medications chenodiol (KEE-noh-DY-awl) (Chenix) and ursodiol (ERS-oh-DY-awl) (Actigall). These medicines are most often used for people who cannot have an operation.

Ostomate
(AH-stuh-mayt)
A person who has an ostomy. Called ostomist in some countries.

Ostomy
(AH-stuh-mee)
An operation that makes it possible for stool to leave the body through an opening made in the abdomen. An ostomy is necessary when part or all of the intestines are removed. Colostomy and ileostomy are types of ostomy.