Final answer:
An intravenous (IV) solution containing dextrose is started when the blood glucose reaches 250 mg/dL in the management of diabetic ketoacidosis and hyperosmolar hyperglycemic syndrome.
Step-by-step explanation:
In the management of diabetic ketoacidosis and hyperosmolar hyperglycemic syndrome, an intravenous (IV) solution that contains dextrose is started when the blood glucose reaches 250 mg/dL.
This is because in these conditions, the body is not able to effectively use glucose for energy and starts breaking down fat instead. This leads to the production of ketones, which can cause a dangerous buildup in the blood.
The IV solution with dextrose helps provide the body with glucose to prevent the further breakdown of fat and the accumulation of ketones.