Which feeding pattern has been associated with prolonged ventilator dependence in mechanically ventilated patients?

Which feeding pattern has been associated with prolonged ventilator dependence in mechanically ventilated patients?

• A. Underfeeding
• B. Overfeeding
• C. Both underfeeding and overfeeding
• D. Adequate feeding

Answer: (C)

Adequate energy balance is essential for weaning from mechanical ventilation because both too little and too much energy can hinder respiratory recovery. When calories and protein are insufficient, the body enters a catabolic state and starts breaking down lean muscle, including the diaphragm and other respiratory muscles. This muscle weakness makes it harder for patients to sustain spontaneous breathing, prolonging the time they need the ventilator. On the flip side, giving too many calories—especially excess carbohydrates—raises carbon dioxide production and the oxygen demand of metabolism. The lungs must work harder to blow off CO2, which can complicate weaning and extend ventilator dependence. Overfeeding can also cause metabolic disturbances like hyperglycemia and fatty liver, adding further stress. In contrast, properly targeted feeding helps preserve lean muscle, supports immune function, and avoids excessive CO2 production, facilitating earlier liberation from ventilation.

Adequate energy balance is essential for weaning from mechanical ventilation because both too little and too much energy can hinder respiratory recovery. When calories and protein are insufficient, the body enters a catabolic state and starts breaking down lean muscle, including the diaphragm and other respiratory muscles. This muscle weakness makes it harder for patients to sustain spontaneous breathing, prolonging the time they need the ventilator. On the flip side, giving too many calories—especially excess carbohydrates—raises carbon dioxide production and the oxygen demand of metabolism. The lungs must work harder to blow off CO2, which can complicate weaning and extend ventilator dependence. Overfeeding can also cause metabolic disturbances like hyperglycemia and fatty liver, adding further stress. In contrast, properly targeted feeding helps preserve lean muscle, supports immune function, and avoids excessive CO2 production, facilitating earlier liberation from ventilation.