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Unformatted text preview: Endoscopy is a powerful medical tool used for diagnosis and treatment of human diseases. Major developments in technology have paved the way for endoscopes to assume a key role in the practice of medicine. Endoscopes have unparalleled ability to visualize lesions within internal organs with high resolution for minimally invasive medical purposes. These instruments can be inserted through natural body orifices (mouth, nose, anus, urethra) to access hollow organs, such as the oropharynx, esophagus, stomach, small intestine, colon, larynx, bronchial tree, and urinary bladder. This chapter will first present the fundamental concepts of endoscopy, including the optical, mechanical, and electronic designs required for proper function of an endoscope. In this section, an upper gastrointentinal endoscope, or esophago-gastro-duodenoscope, will be used to illustrate the basic components of an endoscope. An upper gastrointentinal endoscope is used to visualize the esophagus, stomach, and duodenum. A schematic diagram detailing the individual components of the endoscope is shown in Figure 11-1. The distal tip contains the optics required for illuminating and collecting endosocpic images, channels for delivery of instruments, and the mechanisms for providing air, water, and suction. The bending section contains a set of hinges that allow the distal tip to deflect at large angles as high as 270°. The insertion tube comprises the distal part of the endoscope and is covered with a angles as high as 270°....
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This note was uploaded on 02/07/2011 for the course MECH 633 taught by Professor Mohammadnasserdine during the Spring '10 term at American University of Beirut.
- Spring '10