 Then, the tip of the XP-160 videoscope was introduced into the oropharynx, and under direct visualization, we could advance the endoscope into the upper, mid, and lower esophagus. 
Then , the tip of the XP-160 videoscope was introduced into the oropharynx , and under direct visualization , we could advance the endoscope into the upper , mid , and lower esophagus .