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  • Title: Intra- and extrarenal factors of oedema formation in the nephrotic syndrome.
    Author: Tulassay T, Rascher W, Schärer K.
    Journal: Pediatr Nephrol; 1989 Jan; 3(1):92-100. PubMed ID: 2702097.
    Abstract:
    The role of intra- and extrarenal factors in oedema formation in children with nephrotic syndrome is reviewed. Oedema reflects an abnormal accumulation of fluid within the interstitial tissue. At the capillary level oedema develops when increased lymph flow is no longer effective for the removal of interstitial fluid and the maintenance of intravascular volume. Alterations of intrarenal haemodynamics and tubular sodium reabsorption contribute to sodium retention. Recent studies suggest that during oedema formation reduced effective circulatory volume triggers changes in various hormonal systems, such as renin-angiotensin-aldosterone, noradrenaline, dopamine, vasopressin, prostaglandins and natriuretic factors, which contribute to sodium and water retention. It appears that the release of atrial natriuretic peptide following central volume expansion is responsible for the increased urine flow and natriuresis after intravenous administration of albumin.
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