What is the most serious complication of nasopharyngeal airway insertion into a patient with facial trauma?

The most serious complication of nasopharyngeal airway insertion in a patient with facial trauma is misplacement into the cranial cavity. When there is facial trauma, especially involving fractures of the skull or base of the skull, there is a risk that the nasopharyngeal airway can be inadvertently inserted into the cranial cavity instead of the intended airway passage. This can lead to significant complications, including potential brain injury, cerebrospinal fluid leaks, and severe intracranial hemorrhage.

Proper anatomical knowledge and assessment of the patient's injuries are crucial when considering airway interventions in patients with facial trauma to prevent such life-threatening consequences. It is vital to assess the risk factors before attempting the insertion of a nasopharyngeal airway in this population.