Nutritional and other types of oedema, albumin, complex carbohydrates and the interstitium – a response to Malcolm Coulthard's hypothesis: Oedema in kwashiorkor is caused by hypo-albuminaemia

Abstract

The various types of oedema in man are considered in relation to Starling's hypothesis of fluid movement from capillaries, with the main emphasis on nutritional oedema and the nephrotic syndrome in children. It is concluded that each condition has sufficient anomalous findings to render Starling's hypothesis untenable. The finding that the endothelial glycocalyx is key to control of fluid movement from and into the capillaries calls for complete revision of our understanding of oedema formation. The factors so far known to affect the function of the glycocalyx are reviewed. As these depend upon sulphated proteoglycans and other glycosaminoglycans, the argument is advanced that the same abnormalities will extend to the interstitial space and that kwashiorkor is fundamentally related to a defect in sulphur metabolism which can explain all the clinical features of the condition, including the formation of oedema.

Keywords:

• Edema
• Oedema
• Albumin
• Kwashiorkor
• Malnutrition
• Nephrotic syndrome
• Glycosaminoglycans
• Glycocalyx
• Proteoglycans
• Potassium deficiency
• Vitamin E deficiency
• Beriberi
• Pre-eclampsia
• War oedema
• Hunger oedema
• Famine oedema
• Epidemic dropsy
• Heart failure
• Renin
• Angiotensin
• Aldosterone
• Salt
• Water
• Protein-energy malnutrition
• Severe acute malnutrition