<prompt> The cause of oedema in Nephritic syndrome isDecreased in plasma protein concentrationIncreased in plasma protein concentrationReduced plasma osmotic pressureSodium and water retension  <response>: Sodium and water retension 80, 522 - R 100, 683 - HM 554- Basic pathology 8thPatho Physiologic categories of EDEMAIncreased Hydrostatic pressureReduced plasma Osmotic pressureHypo proteinemiaIncreased venous return CHF Constrictive pericarditis Ascites liver cirrhosis Venous obstruction or compression Thrombosis External pressure e.g. mass Lower extremity inactivity with prolong dependancy Arterioler dilation- Heat- Neuro humoral dysregulation- Protein losing glomerulopathies Nephroticsyndrome- Liver cirrhoses ascitis- Malnutrition- Protein losing gastro enteropathySODIUM RETENSION Excessive salt intake with renal insufficiency Increased tubular reabsorption of sodium- Renal hypoperfusion- Increased renin - angio tension aldosterone secretion Reduced plasma osmotic pressure can result from excessive loss or reduced synthesis of albumin, the serum protein most responsible for maintaining colloid osmotic pressure. An important cause of albumin loss is the NEPHROTIC SYNDROME characterized by a leak glomerular capillary wall and generalized edema Nephritic syndrome - oedema is due to excessive reabsorption of sodium and water in the renal tubules via renin angiotensin - aldosterone mechanism 