HYPEREMIA _CONGESTION - PowerPoint by akashyap

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									HYPEREMIA &CONGESTION
INCREASE IN THE VOLUME OF BLOOD IN ANY TISSUE

Hyperemia
 Hyperemia- increase in blood flow

-is an active process eg: skeletal muscle during exercise - inflammation

Congestion
 Impaired outflow
 Passive process  Can be

Systemic-as in Congestive heart failure localised- obstruction to the venous flow

Congestion
In Acute Congestion: Edema Rupture of congested vessels-foci of haemorrhage In Chronic congestion Breakdown and phagocytosis of red cell debris – haemosiderin laden macrophages Stasis of poorly oxygenated bloodHypoxia –parenchymal injury or death Fibrosis

Congestion of Lungs
Occurs with left sided heart failure Acute venous congestion Alveolar capillaries are congested Edema and focal haemorrhages Chronic venous Congestion Alveolar spaces contain haemosiderin laden macrophages(Heart failure cells) Fibrosis of alveolar sep -BROWN INDURATION OF LUNG

Venous Congestion of liver
Occurs with Right sided failure In acute hepatic congestion Central vein is congested ,haemorrhage In Chronic Passive Congestion Grossly-the central region of the lobules are red due to congestion,and haemosiderin laden macrophages and the periphery of the lobule is normal-NUTMEG APPEARANCE


								
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