The classic laryngeal mask airway is one of the keystones of modern anaesthetic practice. It achieves a reliable airway with a low incidence of major complications and pharynges-laryngeal morbidity. The manufactures of laryngeal mask airway recommend the proper size selection by actual body weight. It was recommended a size 3 for 30-70kg, a size 4 for 70-90 kg, and size 5 for \> 90 kg. Obesity increases the fat tissue around an upper airway and decreases the pharyngeal cross sectional area. Also it was reported that pharyngeal area was reduced according to the increasing of BMI. Therefore, the aim of this study is to determine which of actual body weight or ideal body weight is proper on the size selection of laryngeal mask airway.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Enrollment
100
According randomized allocated group, the laryngeal mask airway is inserted based on actual or ideal body weight-based sizes before the surgery.
According randomized allocated group, the laryngeal mask airway is inserted based on actual or ideal body weight-based sizes before the surgery.
Severance Hospital
Seoul, Seoul, South Korea
Oropharyngeal leak pressure
Oropharyngeal leak pressure is measured when the airway pressure becomes the plateau state in condition of gas flow 3 L/min and flow out valve 30 cmH2O.
Time frame: 10mins
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