Lower gastrointestinal series Lower gastrointestinal series A lower gastrointestinal series is a medical procedure used to examine and diagnose problems with the human colon (large intestine). Radiographs (X-ray pictures) are taken while barium sulfate, a radiocontrast agent, fills the colon via an enema through the rectum. The term barium enema usually refers to a lower gastrointestinal series, although enteroclysis (an upper gastrointestinal series) is often called a small bowel barium enema. This test may be done in a hospital or clinic. The patient lies on the X-ray table and a preliminary X-ray is taken. The patient is then asked to lie on the
Colon (punctuation) used as a fallback when this character is not available, and in the practical orthography of some languages which have a phonemic long/short distinction in vowels. If the upper triangle is used without the lower one ("modifier letter half triangular colon", Unicode U+02D1: ), it designates a "half-long" vowel. Other phonetic alphabets also use colons. For example, the Uralic Phonetic Alphabet uses In Finnish and Swedish, the colon can appear inside words in a manner similar to the apostrophe in the English possessive case, connecting a grammatical suffix to an abbreviation or initialism, a special symbol, or a digit (e.g.,