What are the differences and connections between B-ultrasound, fluoroscopy, barium meal and gastroscopy?

B-ultrasound works by applying the reflection principle of ultrasound. Its probe is not only a device for emitting ultrasonic waves, but also a device for receiving ultrasonic waves. After a series of signal conversion, it is reflected on the screen, and a tomographic image is composed of light spots with different brightness. It is widely used in abdominal parenchymal organ examination, gynecological pelvic examination and examination of organs close to the body surface such as eyeball, thyroid gland, testis and peripheral blood vessels.

Perspective: X-rays can penetrate the human body. According to the different absorption rates of X-rays in different parts of the human body, they are reflected to the screen through the TV system, which is widely used in the examination of lungs and limbs. The disadvantage is that X-rays have certain damage to human cells.

The principle of barium meal is the same as perspective. It is difficult to observe the mucosal structure of esophagus, stomach and small intestine under ordinary fluoroscopy. Medical barium sulfate powder is a very fine and high-purity X-ray opaque contrast agent, which contains a certain amount of viscous preparation. After adding a certain amount of water to make it paste, the morphology of esophagus and gastrointestinal mucosa can be well displayed, and the gastrointestinal peristalsis function can be dynamically observed.

Gastroscope uses the principle that optical fiber enters esophagus, stomach and intestine through human mouth, which can observe the mucosal surface at close range, find the abnormal changes of mucosal surface at an early stage, and make a diagnosis through pathological biopsy.

The first three examinations belong to the category of medical imaging examination. B-ultrasound is mainly used to examine abdominal solid organs (liver, gallbladder, pancreas, spleen and kidney). X-ray is mainly aimed at the lungs, and barium meal is mainly aimed at the esophagus and gastrointestinal tract. The three methods complement each other and cannot replace each other, and can be used for routine physical examination. Affordable, almost painless examination.

Gastroscope belongs to the category of gastrointestinal diseases, which is mainly a method to diagnose reflux esophagitis, gastritis, duodenitis, ulcer, esophageal cancer, gastric cancer and other diseases. Characterized by pathological biopsy.