The use of external laryngeal manipulation serves to improve which of the following?

The use of external laryngeal manipulation is primarily aimed at improving glottic visualization during intubation or airway management procedures. This technique involves applying pressure to the thyroid and cricoid cartilages to adjust the position of the larynx, thereby enhancing the view of the vocal cords. By facilitating better alignment between the airway and the visualization tools, such as laryngoscopes, healthcare providers can more easily insert an endotracheal tube and secure the airway.

Effective glottic visualization is crucial for successful intubation, especially in challenging airway scenarios, and external laryngeal manipulation is a valuable skill that can significantly enhance this aspect of airway management. This contrasts with the other options, which do not directly relate to the primary objective of external laryngeal manipulation. For instance, while reducing the risk of airway trauma is important in airway management, it is not the main aim of this technique. Similarly, external laryngeal manipulation does not focus on gastric distention or cause aspiration; instead, it aims to improve the clarity of view during intubation procedures.