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.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
35
ETT cuff will be inflated till the disappearance of audible air leak on auscultation, while abdominal carbon dioxide (CO2) inflation is maintained with peak inspiratory pressure of 25 cm H2O during volume controlled ventilation. The patient will be in the Trendelenburg position.
ETT cuff will be inflated till the VE/VI ratio meets the initial VE/VI ratio, while abdominal CO2 inflation is maintained with peak inspiratory pressure of 25 cm H2O during volume controlled ventilation. The patient will be in the Trendelenburg position.
Dept. of anesthesiology and pain medicine, Dongguk University Ilsan Hospital
Goyang, Gyeonggido, South Korea
Intracuff Pressure
The intracuff pressure of endotracheal tube when cuff sealing is achieved.
Time frame: From the start of cuff inflation to the airway sealing, an average of 2 minutes
Intracuff air volume
The intracuff air volume of endotracheal tube when cuff sealing is achieved.
Time frame: From the start of cuff inflation to the airway sealing, an average of 2 minutes
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