Diabetic Emergencies: Recognition And Treatment - NCLEX Rn

1. What is the most serious acute complication to monitor for during DKA/HHS treatment?

   Hypokalemia leading to dysrhythmias. Insulin therapy shifts potassium intracellularly, potentially causing life-threatening arrhythmias.

2. Identify the best next step when an IV insulin infusion is ordered but potassium is $2.9$ mEq/L.

   Do not start insulin; initiate potassium replacement. Hypokalemia below 3.3 mEq/L risks cardiac arrhythmias if insulin is given without replacement.

3. Which lab is most useful to quantify ketone burden and monitor DKA improvement?

   Serum beta-hydroxybutyrate. Beta-hydroxybutyrate is the predominant ketoacid in DKA, providing accurate monitoring of ketosis resolution.

4. Identify the immediate nursing action for DKA/HHS with hypotension and tachycardia.

   Start rapid isotonic IV fluids and reassess perfusion. Hypotension and tachycardia indicate hypovolemic shock requiring urgent fluid resuscitation to stabilize hemodynamics.

5. What is the primary goal of insulin therapy in DKA: normalize glucose or stop ketogenesis?

   Stop ketogenesis and close the anion gap. Insulin inhibits lipolysis and ketone formation, resolving acidosis beyond just glucose control.

6. Which diabetes type is most commonly associated with HHS?

   Type $2$ diabetes mellitus. Residual insulin secretion prevents ketosis but allows severe hyperglycemia and hyperosmolarity.

7. What is the typical ketone status in HHS compared with DKA?

   Absent or mild ketones (vs marked ketonemia in DKA). Sufficient insulin in HHS suppresses ketogenesis despite hyperglycemia, unlike profound deficiency in DKA.

8. When glucose falls during DKA treatment, what fluid change helps prevent hypoglycemia?

   Add dextrose to IV fluids while continuing insulin. Dextrose maintains euglycemia while insulin continues to suppress ketogenesis.

9. Which electrolyte must be checked and addressed before starting IV insulin in DKA/HHS?

   Serum potassium. Insulin drives potassium intracellularly, risking hypokalemia if levels are not adequate initially.

10. Which option best prevents cerebral edema risk during DKA treatment: rapid or gradual correction?

    Gradual correction of hyperglycemia and osmolality. Slow correction avoids rapid osmotic shifts that could cause cerebral edema, especially in pediatrics.

11. What transition is required when stopping IV insulin after DKA resolves?

    Give subcutaneous basal insulin before stopping IV infusion. Subcutaneous insulin ensures continuous coverage to prevent rebound hyperglycemia after IV discontinuation.

12. What is the hallmark metabolic problem in hyperosmolar hyperglycemic state (HHS)?

    Severe hyperosmolarity with minimal or no ketoacidosis. Extreme hyperglycemia leads to osmotic diuresis and profound dehydration without significant ketone production.

13. What is the hallmark acid–base disturbance in diabetic ketoacidosis (DKA)?

    High anion gap metabolic acidosis. Accumulation of ketoacids from insulin deficiency causes metabolic acidosis with an elevated anion gap.

14. What action is indicated if serum potassium is low before insulin is started in DKA/HHS?

    Hold insulin and replace potassium first. Low potassium increases arrhythmia risk, and insulin would further decrease levels.

15. Which initial therapy has the highest priority in both DKA and HHS?

    Aggressive isotonic IV fluid resuscitation. Fluid deficits from osmotic diuresis cause hypovolemia, which must be corrected to restore perfusion.

16. What IV fluid is typically started first for suspected DKA or HHS?

    Isotonic crystalloid (e.g., $0.9\%$ normal saline). Normal saline corrects hypovolemia and dilutes hyperglycemia without causing rapid osmotic shifts.

17. Which lab trend best indicates that DKA is resolving during treatment?

    Anion gap closes and bicarbonate rises. These changes reflect clearance of ketoacids and resolution of metabolic acidosis.

18. Which complication is more prominent in HHS: dehydration or acidosis?

    Profound dehydration. Hyperosmolarity in HHS causes severe osmotic diuresis and fluid loss exceeding that in DKA.

19. Which assessment finding is most concerning for HHS severity?

    Altered mental status from hyperosmolarity. High serum osmolality impairs cerebral function, correlating with HHS mortality risk.

20. What bedside finding most strongly suggests DKA rather than HHS?

    Kussmaul respirations with fruity (acetone) breath. These signs indicate compensatory hyperventilation for acidosis and ketonemia from acetone.

21. Which insulin route is preferred for initial treatment of moderate to severe DKA?

    Continuous IV regular insulin infusion. IV infusion provides precise control to suppress ketogenesis and gradually lower glucose.

22. What potassium trend is expected after insulin therapy begins in DKA/HHS?

    Serum potassium decreases as potassium shifts into cells. Insulin and glucose correction promote potassium uptake into cells, lowering serum levels.

23. Which diabetes type is most commonly associated with DKA?

    Type $1$ diabetes mellitus. Absolute insulin deficiency in this type promotes lipolysis and ketone production leading to ketoacidosis.

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