E-T Tube Cuff Pressure Change After Changing Position From Neutral to Hyperextension of Neck

Endotracheal Tube Intracuff Pressure Change After Changing Position From Neutral to Hyperextension of Neck - Comparison of a Tapered Shaped- and Cylindrical Shaped Cuff

This study evaluates difference of the endotracheal tube cuff pressure between a tapered- versus a cylindrical- shaped cuff after changing from neutral to hyperextension of neck.

Fifty patients undergoing thyroidectomy are randomly allocated into two groups (tapered- and cylindrical-shaped cuff). Endotracheal tube cuff pressure is initially set at 20 cmH20 in the supine neutral position and is measured after the change to the neck extension.

Inclusion Criteria:

• American Society of Anesthesiologists physical classification 1-3, 18-70 year old, thyroidectomy

Exclusion Criteria:

• difficult intubation, history of cervical disease, motion limitation of neck, morbid obesity