Management of CO2 Retention in DKA with Reverse Takotsubo Cardiomyopathy and Pleural Effusion

Initial Assessment and Stabilization

The American Diabetes Association recommends beginning with isotonic fluid resuscitation using balanced electrolyte solutions at 15-20 mL/kg/h during the first hour to restore circulatory volume and tissue perfusion 1
A comprehensive laboratory evaluation including plasma glucose, blood urea nitrogen, creatinine, serum ketones, electrolytes with calculated anion gap, osmolality, urinalysis, arterial blood gases, and complete blood count is necessary for initial assessment 1

The American Thoracic Society suggests providing supplemental oxygen to maintain oxygen saturation >92% to improve tissue oxygenation and reduce respiratory drive 1
Positioning the patient upright (if hemodynamically stable) can improve lung expansion and ventilation 1
Consider thoracentesis for bilateral pleural effusions if they are contributing significantly to respiratory compromise, as recommended by the American College of Chest Physicians 2
Avoid excessive fluid administration which may worsen pulmonary edema and pleural effusions, according to the American Heart Association 2

The American Diabetes Association recommends administering intravenous regular insulin at 0.1 U/kg/h without bolus (due to cardiac compromise) after confirming adequate renal function and potassium >3.3 mEq/L 1
Target gradual reduction in blood glucose by 50-75 mg/dL/hour, as suggested by the Endocrine Society 1
Add dextrose to IV fluids when blood glucose reaches 250 mg/dL while continuing insulin infusion to clear ketones, according to the American Association of Clinical Endocrinologists 1
Monitor electrolytes closely, especially potassium, and replace as needed when levels fall below 5.5 mEq/L, as recommended by the National Institute of Diabetes and Digestive and Kidney Diseases 2

Monitor fluid input/output, hemodynamic parameters, and clinical examination to assess progress with fluid replacement, as suggested by the Society of Critical Care Medicine 1
Check blood glucose every 1-2 hours until stable, then every 4 hours, according to the American Diabetes Association 1
Draw blood every 2-4 hours to determine serum electrolytes, glucose, blood urea nitrogen, creatinine, osmolality, and venous pH, as recommended by the National Institute of Diabetes and Digestive and Kidney Diseases 1
Watch for signs of cerebral edema, which can be a rare but serious complication of DKA treatment, especially in younger patients, according to the American Academy of Pediatrics 2

Once DKA resolves (glucose <200 mg/dL, bicarbonate ≥18 mEq/L, pH >7.3), transition to subcutaneous insulin, as recommended by the American Diabetes Association 1
Administer basal insulin 2-4 hours before stopping IV insulin to prevent recurrence of ketoacidosis, according to the American Association of Clinical Endocrinologists 3
Develop a structured discharge plan tailored to the individual patient to reduce readmission risk, as suggested by the Agency for Healthcare Research and Quality 3

Avoid rapid correction of hyperglycemia and osmolality (not exceeding 3 mOsm/kg/h) to prevent cerebral edema, as recommended by the American Diabetes Association 2
Do not discontinue insulin therapy prematurely, as ketosis may persist even after normalization of blood glucose, according to the Endocrine Society 1
Avoid excessive fluid administration in the setting of cardiac dysfunction and pleural effusions, as suggested by the American Heart Association 2