Silver (Argentum, Ag) is a chemical element of group I of the periodic system of elements of D. I. Mendeleyev. Serial number 47, atomic weight (mass) 107,868. Valence connections + 1. The density of 10.5, temperature melting 960,8 degrees.
The preparations of silver. The preparations of silver have astringent and anti-inflammatory effect. In pure form and in concentrated solutions burn the tissue. Silver ions have strong antibacterial properties that begin to occur at very low concentrations (oligodynamic effect).
In medical practice, use the following preparations of silver.
Silver nitrate (Argenti nitras, Argentum nitricum; synonym lapis; list). Applied in the form pencils for burning the warts, granulations and so on; in diluted solutions (0,1-0,25%)- as astringent and antimicrobial agent for lotions, in the form of eye drops, and also for syringing.
Protargol (Protargolum) - colloidal drug silver. Contains a 7.8-8.3% of silver. Apply 1-3% solution of protargol for washing the urethra and bladder at cystitis and urethritis, drops for a nose for chronic rhinitis in children, in the form of eye drops for conjunctivitis, blepharitis.
Colloid silver colloidal; Collargolum; list B) - colloidal drug that contains 70% of silver. Applied in the form of 0.2-1% solution for washing wounds, 1-2% solution for irrigation of the bladder with chronic cystitis and urethritis, as well as in the form of eye drops at purulent conjunctivitis and infections.
Bactericidal paper paper soaked nitrate and chloride silver. When a small wounds, abrasions, burns II degree (after removal of the bladder) bactericidal paper, lightly moistened with water, put on the affected area, covered with a thin layer of cotton wool and fix bandage.
Poisoning by drugs silver may occur by ingestion of concentrated solutions; proceeds by type of hemorrhagic gastroenteritis. As an antidote to apply 2-3% solution of sodium chloride for washing stomach.
The preparations of silver keep in dark place.
Silver radioactive. Practical importance isotopes Ag110 and Ag111 with half-lives accordingly 253 and 7.6 per day with beta - and gamma-radiation. Ag110 used in biological research. With its help studied the distribution of silver in organs and tissues, the role of silver as a trace element, its influence on the action of enzymes , etc., are used In medicine mainly Ag111. With this isotope is prepared absorbable materials - threading for flashing the tumor to radiation, gauze sponges, pastes for introduction into the tumor bed after its removal. Colloidal solutions Ag111 injected or mitriptyline for irradiation bodies, rich reticuloendothelial cells, as well as to identify hidden pockets of inflammation, which accumulate colloidal silver particles captured by phagocytes. Cm. also Radioactive drugs.