What was the early medical endoscope like?

The earliest use of endoscopes was in rectal examination. The doctor inserted a hard tube into the patient's anus and, with the light of a candle, observed the lesions in the rectum. The diagnostic data available with this method are limited, and the patient is not only in pain, but there is a great risk of perforation due to the hardness of the instrument. Despite these drawbacks, endoscopy has continued to be used and developed, with many different applications and different types of instruments gradually being designed.

In 1973, laser technology was applied to the treatment of endoscopy, and gradually became one of the means of endoscopic treatment of gastrointestinal bleeding. In 1981, endoscopic ultrasound technology was successfully developed. This new development of combining advanced ultrasound technology with endoscope greatly increased the accuracy of the diagnosis of lesions.

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