Hypernatremia

Hypernatremia is a condition where the blood sodium is too high (usually 145 mmol / L) and the blood osmotic pressure is too high. With the exception of individual cases (excessive input of liquids containing too much sodium and so on), the disease is mainly caused by water loss, sometimes accompanied by sodium loss, but the degree of water loss is greater than sodium loss. The disease often has a decrease in intracellular water, which is due to the extracellular high osmotic pressure that can draw the intracellular water out of the cells; therefore, blood volume does not decrease at the beginning, but it can still decrease in the later stages.