Kettering Registered Respiratory Practice Exam

High peak inspiratory pressure readings indicate potential risk for ventilator-induced lung injury because they suggest higher resistance in the airway or decreased compliance in the lung. When peak pressures are elevated, it often reflects either obstructive processes such as bronchospasm, secretions, or airway edema, or restrictive processes such as lung stiffness due to conditions like ARDS (acute respiratory distress syndrome). Elevated pressures can result in over-distension of alveoli and barotrauma, leading to further lung injury.

Low tidal volume settings are actually a strategy used to minimize ventilator-induced lung injury, particularly in patients with ARDS, as they help prevent over-distension of healthy lung units. Consistent PEEP (positive end-expiratory pressure) levels are generally employed to prevent alveolar collapse and help maintain oxygenation, while stable blood gases indicate effective ventilation and perfusion, reducing the likelihood of injury. Thus, high peak inspiratory pressures serve as a clear warning sign of possible adverse effects on lung health during mechanical ventilation.