Effectiveness of Cricoid and Paratracheal Pressures for Occluding Esophagus

Effectiveness of Cricoid and Paratracheal Pressures for Occluding Esophagus in Anesthetized and Paralyzed Patients During the Induction of Anesthesia

Comparing the effects of 'Cricoid pressure' or 'Paratracheal pressure' during direct laryngoscopy

The effectiveness of cricoid pressure and paratracheal pressure for occluding esophagus during direct and video laryngoscopies.

Inclusion Criteria:

• Who would be scheduled any surgery under general anesthesia and agree with the purpose of the study

Exclusion Criteria:

• Risk of aspiration
• History of esophageal surgery
• Diseases or anatomical abnormalities of the neck, larynx, pharynx or esophagus
• Known or predicted difficult airway.