IMBIBITION

From Big Medical Encyclopedia

IMBIBITION (Latin imbibere to absorb) — treatment and a peculiar coloring of fabrics and bodies the substances dissolved in them. And. difficult physical. - the chemical process including such phenomena as a capillary attraction, molecular adsorption, osmotic and oncotic processes. Distinguish intravital and cadaveric I. K of intravital carry a prokrashivaniye of fabrics the bilirubin which a lot of is contained in blood at jaundices (see. Jaundice ) various origin, a prokrashivaniye bile of nekrotizirovanny peyerovy plaques and solitary follicles at a typhoid, films at diphtheritic an inflammation of intestines, And., hemoglobin of fabrics, in particular skin, at a mephitic gangrene and poisoning with hemolitic poisons etc. Cadaveric And. can be hypostatic and putrefactive.

The hypostatic imbibition

the Hypostatic imbibition is the third stage of formation of livors mortis (see. Corpse ). Its intensity depends on a cause of death, ambient temperature and some other factors. This process begins by the end of the first days after approach of death: hemoglobin of erythrocytes is gradually dissolved in a blood plasma, painting it at first in pinkish, and then in reddish color; plasma diffuses through walls of blood vessels in surrounding fabrics which get a reddish shade. In a stage of diffusion at beginning And. livors mortis during the pressing turn pale. At a section of skin at this stage it is possible to see allocated from the cut vessels of a drop of blood, the removals which are again appearing later. At microscopic examination homogenization of contents of vessels is observed, a cut hematoxylin-eosine is painted in orange color; walls of vessels and surrounding fabrics are painted in the same color. Collagenic fibers of a derma are in a condition of swelling, are moved apart by pinkish and reddish liquid. By the beginning of second day the intercellular lymph gets into vessels that leads to even more accelerated process of hemolysis of erythrocytes, promotes acceleration of diffusion of contents of vessels in surrounding fabrics and to their coloring in cyanotic-red color. By the end of second day livors mortis during the pressing do not turn pale and do not disappear. At a section of skin of fabric have it uniform light-violet color; drops of blood from the cut vessels are not allocated. At microscopic examination intensive orange coloring of the derma containing grains of a brown pigment (haemo fuscin) which does not give reaction to iron is observed. Gradually the structure of skin becomes less clear. Hypostatic And. during the same periods it is observed also in underlying departments of a brain, lungs, a stomach, intestines, a liver, kidneys, a pancreas etc. In court. - medical practice existence hypostatic And. is the orienting sign for determination of prescription of approach of death. To posthumous And. it is possible to refer also posthumous diffusion of bile through walls of a gall bladder owing to what its bed, and also loops of intestines adjoining to a gall bladder and a peritoneum are sometimes painted in flavovirent color.

Putrefactive imbibition

Putrefactive imbibition arises owing to far come process of rotting of a corpse. The first stage of rotting is the increasing formation of the putrefactive gases containing a large amount of various chemical substances. Under the influence of these substances, proteolytic enzymes and in the presence of enough moisture of a squirrel of fabrics and bodies are gradually liquefied. Internals are softened, become impregnated with the formed liquid and gain uniform brown-red color; then coloring passes into brownish-dirty-green. A microscopic picture at putrefactive And. it is characterized by disintegration of cellular elements, a wastage of specific structure of fabrics and bodies. However the stroma of bodies remains a long time — the form and the direction of collagenic and elastic fibers and an outline of vessels are visible that it allows not only to identify body or fabric, but in some cases to establish existence patol, changes.

Yu. L. Melnikov.

Яндекс.Метрика