Final answer:
Correct positioning of the laryngoscope blade in the vallecula during intubation should result in the lifting of the epiglottis, allowing the clinician to see the glottis and the vocal cords.
Step-by-step explanation:
When the tip of the blade is correctly positioned in the vallecula during an intubation procedure, it helps to lift the epiglottis, allowing the clinician to see the opening of the trachea and the vocal cords. The vallecula is a space located at the base of the tongue where the blade of a laryngoscope is commonly placed to facilitate endotracheal intubation. This action lifts the epiglottis and exposes the glottis, which includes the true vocal cords and the space between them. Therefore, when the blade is positioned correctly, you should see the epiglottis lift, offering a view of the vocal cords, which will typically appear as white, membranous folds and should be open if the patient is under appropriate muscle relaxation during general anesthesia.