Acute diabetes complications soap

In the management of diabetic ketoacidosis (DKA), at what serum glucose level should dextrose be added to the saline solution?

1: When it falls to 300 milligrams per deciliter
2: When it falls to 100 milligrams per deciliter
3: When it falls to 200 milligrams per deciliter
4: There is no need to add dextrose for DKA management