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79. Haemolytic jaundice.

Total bilirubin level is increased in plasma because of indirect bilirubin. Direct bilirubin is not changed because hepatocytes cytoltsis and cholestasis are absent. Stercobilin increasing in urine and faeces gives them black color. Urine and faeces colour changing is important for making proper diagnosis and for differential diagnostics.

80. Hepato-cellular or parenchymatous jaundice.

Is developed at hepatic failure. Inirect (non-conjugated) bilirubin is increased in plasma because desintoxicational liver function is disturbed. Also direct bilirubin is rised up because of hepatocytes cytolysis.

81. Hepato-portal hypertension. Ascitis.

Hepato-portal hypertension is developed as a result of blood outflow disorders from abdominal cavity organs through portal veins vascular system.

Types dependently on location of obstacle (embol, pressure with tumor) to blood flow:

1) subhepatic – if obstacle is in portal vein stem or large branches (ambols, pressure with tumor);

  1. intrahepatic – obstacle is located inside liver (prolonged spasm of sinusoids smooth-muscular sphincters; small hepatic veins pressure with nodes of regenerating hepatocytes at liver injury, its cirrhosis);

  2. suprahepatic – obstacle is located in extraorganis parts of hepatic veins or vena cava inferior proximally from place of hepatic veins inflow into it. Portal hypertension occurig at pressure increasing in vena cava inferior under conditions of right ventricle insufficieny belongs to the same group.

Main expressions:

    1. collateral circulation switching on determind by porto-caval anastomoses opening. It causes following features development:

a) various dilation of oesophageal veins and the ones of stomach cardia;

b) gastric-intestinal bleedings caused by varicous vins injury;

    1. anterioir thoracical and abdominal wall subcutaneous veins dilation (“jellyfish head”);

    2. blood removal from portal vein to caval veins round liver – it causes intoxication or liver coma in hard cases.

    1. Hepato-lienal syndrome – has 2 main compounds:

a) splenomegaly as a result of blood stagnation;

b) hypersplenism – spleen functional activity increasing - it is expressed in blood formed elements accelerated decomposition; it is characterized by anaemia, leucopenia, thrombocytopenia. Base: linal macrophagues activity enforcement at blood circulation retardation.

    1. Ascitis – see below.

    2. Hepato-lienal syndrome – is expressed in kidney glomerulars filtration

disability at channel epithelium normal function. Reasons: circulating blood volume reducing and vascular hypotony lead to renal circulation diminishing at liver haemodynamic disorders.

Ascitis.

It is free liquid (transsudate as a rule) accumulation in abdominal cavity.

Reasons:

    1. different-origined portal hypertension;

    2. oedemas at chronic cardiac insufficiency, kidney diseases, alimentary dystrophy;

    3. lymph outflow disorders through thoracical duct (its wounding, pressure);

    4. peritoneum injury with tumor or tuberculosis process (ascitis-peritonitis).

Ascitis liquid is usually serose, more seldom – haemorrhagic one.

Pathogenetic factors:

    1. hydrostatic – is connected with blood pressure increasing in portal capillaries;

    2. oncotic – is determined by liver prothein-synthetic function reducing as a result of which hypoproteinemia and hyperoncia are developed;

    3. Na lack in organism due to hyperaldosteronemia and previous renin-angiotensine system activation: blood stagnation in portal vessels→venous return diminishing→heart minute volume decreasing→kidney hypoxy→renin releasing; besides, kidney dysfunction can lead to aldosterone inactivation problems which is equal to its hyperproduction;

    4. lymphogenic – lymphatic flow disorders lead to lymph (rich in protein) transfer in abdominal cavity; it causes abdominal cavity liqud hyperoncy with following water exit from vessels and intersticium.

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