Gastroenterological procedures and tests

Abdominal paracentesis
Colonoscopy - procedure that uses a colonoscope, a flexible scope with a video camera attached, to detect problems or diseases of the anus, rectum, or large intestine (colon).
Endorectal ultrasound - used to see how far rectal cancer has penetrated through the tissues and whether it has spread to nearby organs or tissues.
ERCP including removal of common bile duct stones and biliary stenting
Esophageal manometry - measures muscle contractions in the esophagus and can detect weaknesses that allows acid reflux into the esophagus.
Esophageal pH testing - monitors the pH (acidic level) of stomach acid
Esophageal stenting
Flexible sigmoidoscopy
Gastric feeding tube placement
Hemorrhoidal banding
Liver biopsy
Polypectomy - removal of colon polyps
Upper endoscopy