Skin diseases caused by beryllium and its compounds
Introduction
Introduction to skin diseases caused by bismuth and its compounds 1. Industrial applications: bismuth is mainly used in alloy manufacturing, X-ray tubes, high temperature resistant ceramics and atomic energy industries. In the smelting of bismuth smelting, BeF2, strontium hydroxide [Be(OH)2], barium sulphate (BeSO4·4H2O), strontium chloride (BeCl2), bismuth oxide (BeO) and metal bismuth dust and dust And solution. Among them, cerium oxide dust is the most easy to fly. 2. Physical and chemical properties: is a gray-white light metal, with light weight, strong tension, hard, high temperature resistance, stainless steel, not easy to be corroded, not affected by magnetic force, and does not spark when impacted. Volatile volatiles are easily oxidized into very light cerium oxide dust in the air. In nature, strontium is mainly found in beryl (3BeO·A12O3·6SiO2). basic knowledge The proportion of illness: 0.001% Susceptible people: no special people Mode of infection: non-infectious Complications: stress ulcers
Cause
The cause of skin diseases caused by bismuth and its compounds
(1) Causes of the disease
Mainly due to contact with cerium oxide dust which is oxidized in the air by cerium volatiles.
(two) pathogenesis
Earthworms and their compounds have distinct characteristic toxic effects on the skin, upper respiratory tract and lungs.
Prevention
Skin disease prevention caused by bismuth and its compounds
The production of concrete should be sealed and mechanized. Wet operation should be used as much as possible to avoid high temperature processing. Try to avoid direct contact with cockroaches, pay attention to personal hygiene protection, do a good job of treating waste gas, waste water and waste residue. Workers should conduct regular physical examination. .
Complication
Dermatological complications caused by sputum and its compounds Complications, stress ulcers
Sometimes ulcers form.
Symptom
Symptoms of skin diseases caused by bismuth and its compounds Common symptoms Nodular skin granuloma erythematous nodular proliferative tissue necrosis
Skin lesion
(1) Contact dermatitis: due to exposure to sputum or soluble strontium salt smoke, volatile matter, more than 1 to 2 weeks after exposure, skin lesions occur in the face, hands, forearms, etc., their performance and general contact Sexual dermatitis is no different, its mechanism is mainly due to allergic reactions to sputum, some scholars used four different sputum compounds for animal skin test, found that the plaque test in the sputum-serum albumin group was strongly positive, useful 5% ~10% lanthanum nitrate was used as a patch test. After 2 weeks, pruritic edematous erythema appeared in the test area, followed by a sickle-like proliferative reaction, which subsided after 1 month.
(2) ulcers: often caused by small wounds on the skin and then deposited in the skin by sputum or its salts. It occurs mostly in the hands, wrists, forearms, etc. Its performance is similar to that of chrome sores, and it is not easy to heal. It was cured after it was completely eliminated.
(3) Skin granuloma: a special damage caused by the infiltration of insoluble bismuth compounds such as cerium oxide into the skin. When the fluorescent light fragments are cut through the skin, it may also be caused by the contamination of strontium phosphate in the fragments. Hard, soy to broad bean size, after the bottom of the fibrous tissue necrosis, part of the tissue hyperplasia, sometimes forming ulcers.
2. Other lesions: mainly manifested as inflammation of the upper respiratory tract, acute silicosis and chronic silicosis, the latter mainly caused by diffuse granulomatous lesions in the lung caused by sputum and its oxides, with obvious X-ray signs, urinary sputum determination It can reflect the level of contact with the body.
Using 5% to 10% lanthanum nitrate as a patch test, 2 weeks later, pruritic edematous erythema appeared in the test area, followed by a sickle-like proliferative reaction, which subsided after 1 month.
Examine
Examination of skin diseases caused by bismuth and its compounds
Dinitrochlorobenzene patch test.
Diagnosis
Diagnostic identification of skin diseases caused by bismuth and its compounds
Using 5% to 10% lanthanum nitrate as a patch test, 2 weeks later, pruritic edematous erythema appeared in the test area, followed by a sickle-like proliferative reaction, which subsided after 1 month.
