Endoscopy allows a visual examination of internal organs and body parts without invasive exploratory surgery. Using the endoscope, tissue biopsies can be taken for analysis, and foreign bodies may be removed. The endoscope consists of a long, flexible insertion tube with a bending tip at the end that enters the body, an eyepiece, and a control section. The tip of the endoscope is manipulated using a control knob in the hand piece.
In addition to the light source, two channels are present within the endoscope. One channel permits various endoscopic tools to be passed and fluids to be suctioned or samples taken. The other allows air or water to be passed into the stomach/intestine to insufflate (inject air into the area), or wash away mucus from the viewing port. Special video cameras can be attached to the endoscopes which allow viewing of the exam on a television screen, as well as recording the exam on video.
Types of endoscopy include these:
- Bronchoscopy: an exam of the lower airways.
- Colonoscopy: an exam of the transverse colon, ascending colon, cecum, large bowel, and rectum.
- Endoscopy: an exam of the esophagus, stomach, and upper intestines.