What is the primary concern when the high-pressure limit is reached on a ventilator?

When the high-pressure limit on a ventilator is reached, the primary concern is the risk of barotrauma or ventilator-induced lung injury. This limit is set to prevent excessive pressure from being applied to the lungs, which can cause damage to the alveoli and surrounding lung structures. Barotrauma occurs when the pressure within the lung exceeds the ability of the lung tissue to withstand it, potentially leading to ruptured alveoli, pneumothorax, or other serious complications.

Mechanical ventilation involves delivering breaths under positive pressure, and if this pressure becomes too high, it can over-distend the lungs, impair gas exchange, and lead to significant lung injury. Thus, maintaining ventilatory pressures within a safe limit is crucial for protecting lung integrity and ensuring effective ventilation without causing harm.