For HHS management, what is the main fluid strategy and what is a key difference from DKA regarding insulin use?

• A. Aggressive isotonic saline resuscitation; insulin is used but often at a slower rate; HHS uses less ketogenesis and more pure osmotic diuresis, risk of cerebral edema less but watch for dehydration.
• B. No fluids; insulin high-dose; strong ketogenesis.
• C. Hypotonic saline only; no insulin.
• D. Immediate dialysis.

Answer: (A)

The key idea is that managing hyperosmolar hyperglycemic state hinges on aggressive fluid resuscitation with isotonic saline to restore intravascular volume and dilute the hyperosmolar plasma. Begin with normal saline and monitor perfusion, then transition to fluids that include dextrose once glucose nears about 200 mg/dL. Insulin therapy is used, but more cautiously and later in the course compared with DKA. In HHS, you start insulin after adequate fluid resuscitation and typically at a slower, lower rate, with careful potassium monitoring and replacement as needed. The reason this differs from DKA is that HHS has minimal ketogenesis—there isn’t the same ketoacidosis driving treatment. So while insulin helps correct hyperglycemia and osmolarity, there isn’t a need for rapid, high-dose insulin to reverse ketosis; fluids address the dominant dehydration and osmolar abnormalities, and the risk of cerebral edema is lower, though dehydration remains a major concern. The other options fall short because they either ignore the essential fluid resuscitation, prescribe inappropriate fluids, deny the role of insulin appropriate to HHS, or suggest dialysis as the primary therapy.