Comparison of Endotracheal Intracuff Pressure Between Two Cuff Sealing Methods

Comparison of Endotracheal Intracuff Pressure Between Two Cuff Sealing Methods

The endotracheal intracuff pressure is to be maintained at a low level to prevent trachea and nerve damages, and yet be high enough to secure air sealing. The objective of the study is to compare minimal occlusive volume technique (MOVT) and expired volume/inspired volume ratio (VE/VI ratio) from a spirometer method of endotracheal tube (ETT) cuff inflation with respect to the cuff pressure required to seal the airway during a laparoscopic surgery under general anesthesia. A study design is a randomized crossover trial in 35 patients. The primary outcome is the intracuff pressure of an endotracheal tube. The study consists of two cuff sealing methods separated by a period of 10 minutes.

Inclusion Criteria:

• American Society of Anesthesiologists physical status I, II
• Body mass index < 30 kg/m2
• Elective laparoscopic gynecologic surgery under general anesthesia in the Trendelenburg position

Exclusion Criteria:

• History of airway-related or pulmonary diseases/abnormalities
• When difficult intubation is anticipated
• History of general anesthesia within the past 3 months
• Pregnancy
• History of smoking