Introduction of medical endoscope

Endoscope is a common medical instrument. It consists of a flexible part, a light source and a set of lenses. Through natural openings in the body, or through small incisions made through surgery. When using, the endoscope will be introduced into the organ for pre-examination, and the changes of the relevant parts can be directly observed. The quality of the image directly affects the use effect of endoscope, and also marks the development level of endoscope technology. The earliest endoscopes were used for rectal examination. The doctor inserts a hard tube into the patient's anus and, by the light of a candle, examines the changes in the rectum. The diagnostic data obtained by this method is limited, and the patient is not only painful, but also has a high risk of perforation due to the hardness of the instrument. Despite these shortcomings, endoscopy has continued to be used and developed, gradually designing many different uses and different types of devices.

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