Isotonic dehydration In this form of dehydration, water and sodium are lost from the extracellular fluid in equivalent amounts and there is no osmotic movement of water from the inside of cells to the outside. Isotonic dehydration is often caused by diarrhea, vomiting or inadequate intake of fluid.Click to see full answer. Also asked, what is isotonic dehydration?Isonatremic (isotonic) dehydration occurs when the lost fluid is similar in sodium concentration to the blood. Hypernatremic (hypertonic) dehydration occurs when the lost fluid contains less sodium than the blood (loss of hypotonic fluid). Relatively less sodium than water is lost.Beside above, what are the causes of hypotonic dehydration? In isotonic dehydration, there is an equal loss of water and sodium, and vomiting and diarrhea are the two most common causes. Hypotonic dehydration is caused by a greater loss of sodium than water. The use of diuretics is the most common cause of hypotonic dehydration. In this manner, why is isotonic solution used for dehydration? When fluid loss is severe, hypovolemic shock may occur. Treatment requires isotonic fluid replacement (e.g. Lactated Ringer’s or normal saline) with emphasis on the vascular volume. Hypertonic dehydration. Clinically, this fluid shift out of the cell will cause the cells to shrink in response to the lost fluid.Does dehydration cause blood to become hypotonic or hypertonic?If water loss is greater in comparison to sodium loss, then serum sodium concentration increases, resulting in hypernatremic (or hypertonic) dehydration. If water loss is accompanied by excessive sodium loss, then serum sodium concentration decreases, resulting in hyponatremic (or hypotonic) dehydration.