2026 Glucose Management Complete Practice Test

Dehydration in DKA comes from osmotic diuresis caused by severe hyperglycemia. When blood glucose rises above the kidney’s threshold, glucose spills into the urine, and water follows with it. This ongoing glucose-driven water loss leads to substantial fluid depletion. In DKA, this fluid loss is often worsened by vomiting and reduced oral intake, so patients can become markedly dry with rapid heart rate and low blood pressure. Understanding this helps explain why fluid replacement is a cornerstone of DKA management: restoring intravascular volume helps perfusion and supports the clearance of ketones and glucose as insulin therapy is started. This dehydration is a common feature, not something that only happens in other types of diabetes, and it is directly related to the hyperglycemic state, so statements claiming otherwise aren’t accurate.