Disadvantage of using propofol for prolonged sedation (days) of intubated patients in the ICU is potential:

Disadvantage of using propofol for prolonged sedation (days) of intubated patients in the ICU is potential:

• A. Acidosis
• B. Tachyphylaxis
• C. Hyperglycemia
• D. Bradycardia

Answer: (A)

The main concept here is the risk of propofol infusion syndrome with prolonged high-dose infusions, which can lead to metabolic acidosis. When propofol is given for days, its effects on mitochondrial function and fatty acid oxidation can falter, causing decreased ATP production and increased lactic acid. This lactic acidosis is a defining feature of the syndrome, which also can include rhabdomyolysis, hyperlipidemia, hepatomegaly, renal failure, and cardiac dysfunction. Because metabolic acidosis reflects this serious, syndrome-level complication that emerges with long-term, high-dose propofol, it is the most pertinent disadvantage in the ICU setting. Bradycardia can occur with propofol due to its depressant effects on the heart and vasculature, but it is not the characteristic issue tied to prolonged use. Tachyphylaxis is not a primary concern with propofol, and while hyperglycemia can happen in critically ill patients, it is not the specific drawback of prolonged propofol infusions.

The main concept here is the risk of propofol infusion syndrome with prolonged high-dose infusions, which can lead to metabolic acidosis. When propofol is given for days, its effects on mitochondrial function and fatty acid oxidation can falter, causing decreased ATP production and increased lactic acid. This lactic acidosis is a defining feature of the syndrome, which also can include rhabdomyolysis, hyperlipidemia, hepatomegaly, renal failure, and cardiac dysfunction. Because metabolic acidosis reflects this serious, syndrome-level complication that emerges with long-term, high-dose propofol, it is the most pertinent disadvantage in the ICU setting.

Bradycardia can occur with propofol due to its depressant effects on the heart and vasculature, but it is not the characteristic issue tied to prolonged use. Tachyphylaxis is not a primary concern with propofol, and while hyperglycemia can happen in critically ill patients, it is not the specific drawback of prolonged propofol infusions.