Types of oedema
-
Inflammatory oedema
-
Cardiac oedema
-
Renal oedema
-
Hunger/Famine/War oedema
-
Pulmonary oedema
-
Cachetic oedema
-
Myxoedema
-
Parasitic oedema
-
Angioneurotic oedema
-
Brisket disease
1. Inflammtory oedma
2. Cardiac oedema
|
Oedema - Abdominal cavity - Ascites
|
Cardiac oedema may develop in horses with chronic vesicular emphysema.
3. Renal oedema
-
In acute glomerulonephritis (in man), oedema in face and eyelids are usually seen.
-
Subacue nephritis and nephrosis
-
Decreased colloidal osmotic pressure of blood
-
Increased sodium retention
-
Hypoalbuminaemia stimulates adrenal cortex to secrete increased amount of aldosterone which helps in reabsorption of sodium chloride. This retained salt increases osmotic pressure and cause oedema.
-
Chronic glomerulonephrtis
4. Hunger / Famine / war oedema
5. Pulmonary oedema
|
Oedema - Lung - Rib markings
|
6. Cachetic oedema
-
Anaemia
-
Wasting diseases
-
Malnutrition
-
Cardiac illness
7. Myxoedma
8. Parasitic oedema
9. Angioneurotic oedema
-
In man, allergens like snake venom produces hypersensitivity reaction which increases capillary permeability resulting in oedema in lips, glottis, thorax
-
In animals (cattle, horses), endogenous / exogenous allergens (plant, protein; fish meal) cause release of histamine which damage blood vessels and oedema results.
10. Brisket disease
-
Cattle moved to high altitude 9000ft above sea level develop oedema in abdomen, brisket, neck and jowl.
-
At high altitudes, partial pressure of oxygen is decreased. The resulting hypoxia develops polycythemia (Increased viscosity of blood) and polypnoea (Increased heart beat). Cardiac muscle becomes degenerated as it works in hypoxic condition and hence hypertrophied heart slowly dilates and which draws valves downwards resulting in valvuar incompetency and gives rise to chronic venous congestion.
-
Reason for development of oedema in high altitude
|
Last modified: Wednesday, 7 December 2011, 7:32 AM