Hyponatremia is a condition that sodium less than 135mmol / L in blood. Normal values for serum sodium 142 mmol / L (135-145 mmol / L). Natriuretic volume: normal adult 70 ~ 90mmol/24h, about 4.1 sodium chloride ~ 5.3g. If the urinary Na + <34.19mmol / L or absence of the body that lack of Na +. hyponatremia is a common electrolyte disorder, both sodium and water are closely linked and interdependent. sodium concentration lower , under normal circumstances is also reduced plasma osmotic pressure, it also known as hypotonic hyponatremic syndrome. should be a clear determination of the plasma sodium concentration in the body does not mean that the total amount of sales and distribution of sodium in the body, the determination of reduce the plasma sodium concentration can be sure that the body is not a lack of sodium. hyponatremia such as dilution, which the body does not reduce the total amount of sodium, and sometimes even increased, but because of its overall solution in water to increase more than the increase in sodium obvious, thus reducing the concentration of plasma sodium.
Which type of Hyponatremia are there?
1, lack of sodium hyponatremia: water that is hypotonic. Characterized by reduced total sodium, intracellular sodium will also reduce, lower serum sodium concentration.
2, dilution hyponatremia: refer to water too much. In addition, high blood sugar, such as dehydration or drug use of mannitol may be caused by increased extracellular osmolarity, cells towards the extracellular liquid water, diluted sodium. Characterized by the total amount of sodium may be normal or increase the complexity, the cell fluid and lower serum sodium concentration.
3, Metastatic hyponatremia: a rare, missing the body of sodium, the sodium from the extracellular into the cells. Are the overall characteristics of each normal sodium, liquid sodium cells increased sales to reduce serum.
4, found in malignant tumors: the mechanism is still unknown, found in malignant tumors, advanced liver cirrhosis, malnutrition, aging and ailing, not only ashamed of other serious chronic disease of outstanding late, it hyponatremia, also known as consumption. Cells are probably well-known decomposition of protein consumption, reduce the intracellular osmotic pressure, water shift from extracellular cells. Dilution caused by hyponatremia. It was also suggested that the reconstruction are due to osmotic pressure.