It seems that when I was a child, the teacher will have a story It is said to be the German doctor Kusmoor, in a watch the jianghu entertainer's sword swallowing performance, was greatly inspired. He selected a half-meter-long, about 1 cm in diameter, a straight metal tube, slightly equipped, made a hard tube mirror. With the cooperation of the juggler, Cusmore inserted this rigid tube mirror into the stomach through the juggler's mouth. Under the light of the oil lamp, Cusmore actually saw the gastric mucosa of the jungle artist through the hard tube mirror vaguely.
Medical instruments that could be considered prototypes of endoscopes were found at the ruins of Pompeii (the ancient capital of Italy) in the first century AD.
Some surgeons in the 18th century used tubes and candles to look into the rectum in the hope of examining the body's internal organs without surgery.
Baidu Baidu The Birth of the Endoscope The Origin and Development of Endoscopes