What may occur if BVM ventilation is not performed correctly?

Inadequate ventilation is a critical concern when bag-valve-mask (BVM) ventilation is not performed correctly. Successful BVM ventilation requires not only a proper seal but also the appropriate volume and timing of the breaths delivered. If the mask does not form a proper seal over the patient's mouth and nose, or if the volume administered is insufficient or excessive, it can lead to ineffective gas exchange. This may result in reduced oxygen levels and an increased concentration of carbon dioxide in the bloodstream.

Additionally, if the airway is not adequately managed during BVM ventilation—such as when the airway is obstructed or not properly opened—ventilation can be severely compromised, leading to inadequate oxygenation of the tissues and potentially causing respiratory distress or failure. Therefore, mastering the technique of BVM ventilation is essential to ensure that adequate ventilation is achieved, thus avoiding the dangerous consequences of inadequate ventilation.