you told that the water moves from ICF to Intravascular compartment due glucose which lead to dilutional hyponatremia but sir there is osmotic diuresis also which leading to loss of water from the kidneys so why there is hyponatremia seen in DKA/DM?
DKA causes increase in blood glucose which is an effective solute thus drawing water from the cell to the blood causing polyuria as well as hyponatremia. This is referred as Translocational PsuedoHyponatremia i guess
Osmotic diuresis is a feature of Diabetic Nephropathy i guess due to increased GFR .
If there are 600 molecules of solute(glucose) in the intravascular compartment all 600 will draw water from ICF. Whereas in kidneys diuresis is contributed only by 400 molecules ( due to tubular reabsorption) … inflow into IVC is more than outflow—> dilution
Great answers already