During a transport of a patient with blunt abdominal trauma, if the patient's level of consciousness decreases, you should:

In the context of a patient with blunt abdominal trauma experiencing a decrease in their level of consciousness, prioritizing airway management is crucial. When a patient’s consciousness is lowered, there is a significant risk of airway compromise due to decreased muscle tone and potential inability to protect their airway.

By inserting an airway adjunct, you are ensuring that the airways remain open, which is vital for effective ventilation. Using a Bag-Valve-Mask (BVM) ventilation is also appropriate because it allows for assisted breathing to maintain adequate oxygenation and ventilation when the patient's respiratory drive is compromised. This intervention addresses the immediate risk to the patient's airway and breathing, which is prioritized in any emergency situation.

While reassessing vital signs is important and notifying the receiving hospital is crucial for continuity of care, those actions do not directly address the urgent risk posed by the decreased level of consciousness to the patient’s airway. Similarly, suctioning and increasing oxygen flow can be part of the management plan but do not directly secure the airway. Comprehensive secondary assessments can be performed once the airway is stabilized, making airway management the most critical and immediate response in this scenario.