Preoperative Gum Chewing for Different Durations to Prevent Sore Throat After Endotracheal Intubation

In the preoperative waiting area before transfer to the operating room, patients will chew 1 piece of herbal sugar-free for 2 minutes and then spat it out.

In the preoperative waiting area before transfer to the operating room, patients will chew 1 piece of herbal sugar-free for 4 minutes and then spat it out.