Barium meal for digestive tract examination is medical barium sulfate, which is insoluble in water and lipids, so it will not be absorbed by gastrointestinal mucosa, so it is basically non-toxic to people. Barium meal radiography, that is, barium meal radiography of digestive tract, refers to an examination method that uses barium sulfate as contrast agent to show whether there is any lesion in digestive tract under X-ray irradiation.

Physical and chemical characteristics

Main ingredients: pure products

White diamond crystal.

Melting point (℃): 1580

Relative density: 4.50 (15℃)

Solubility: Insoluble in water and acid. The solubility in water is only 0.0024g/ 100g water. Soluble in hot concentrated sulfuric acid.

Main uses: used as filler of white pigment, paper and rubber, medicine for gastrointestinal X-ray fluoroscopy, etc.

[Edit this paragraph] principle

X-ray examination, due to the different density and thickness of human organs and tissues, presents a natural level contrast between black and white. However, in some parts of the human body, especially in the abdomen, because the density of several internal organs and tissues is similar, it is necessary to introduce a contrast agent (such as medical barium sulfate) that is harmless to the human body and artificially improve the display contrast to achieve the ideal inspection effect. This method of examination is called X-ray photography in clinic.

[Edit this paragraph] Scope of application

Gastrointestinal barium meal radiography and barium enema radiography are commonly used methods in X-ray photography. This test is safe, non-invasive and has no side effects, but some patients, such as patients with acute respiratory infection, patients with severe heart, liver and renal insufficiency, and patients with positive iodine test, are generally not suitable for this test.

[Edit this paragraph] Disadvantages

Barium swallowing or barium enema can only see the outline of digestive tract, and barium-filled gastrointestinal radiography often covers up tiny lesions. Therefore, taking foaming agent orally or injecting gas into the intestine often makes both high-density barium shadow and low-density gas shadow in the gastrointestinal tract, forming gas-barium contrast, which is easy to obtain positive results.

[Edit this paragraph] Classification

According to the needs of clinical diagnosis and treatment, gastrointestinal barium meal radiography can be divided into upper digestive tract barium meal, whole digestive tract barium meal, colon barium enema and small intestine barium enema examination.

[Edit this paragraph] Special case handling measures

If soluble barium salts such as barium chloride are mistaken for barium sulfate in medicine, soluble sulfate such as magnesium sulfate is usually used to detoxify. Barium ion belongs to heavy metal ion, which is very harmful to human body. The introduction of sulfate ion can combine barium ion and sulfate ion to generate barium sulfate, thus eliminating the danger.

[Edit this paragraph] Matters needing attention in barium meal inspection

1. Metal-containing drugs (such as calcium tablets, etc. ) It is forbidden from the day before the exam.

The general examination takes several hours. Please be patient and don't eat anything or leave without the doctor's permission. There were several patients who needed reexamination that afternoon.

It is best to wear underwear without buttons when checking.