What are the potential risks of overventilating a patient with a BVM?

• A. Increased respiratory rate
• B. Barotrauma and decreased cardiac output
• C. Hyperventilation and anxiety
• D. Reduced oxygen saturation levels

Answer: (B)

Overventilating a patient with a bag-valve-mask (BVM) can lead to significant complications, notably barotrauma and decreased cardiac output.

Barotrauma occurs when excessive pressure is applied to the lungs, which can result in ruptured alveoli or pneumothorax. This injury to the lung tissue can lead to serious respiratory complications, including a decrease in the respiratory system's ability to exchange gases effectively.

Additionally, overventilation can decrease cardiac output. This happens because forcing air into the lungs can increase intrathoracic pressure, which can impede venous return to the heart. When the heart is unable to fill with enough blood due to the increased pressure from overventilation, its output is reduced.

Maintaining an appropriate ventilation rate is critical to ensure that adequate oxygen is delivered to the patient without causing adverse effects. Understanding these risks is essential in providing effective and safe ventilatory support to patients who are unable to breathe adequately on their own.