Glottis mask airway (GMA) is supraglottic airway device and is frequently used in patients undergoing general anesthesia. However, gastroesophageal reflux remains a risk during ventilation through supraglottic airway devices. The classical shaped GMA and tulip shaped GMA differ in the shape of their tips. And theoretically the tulip shaped tip fits the larynx better. This study aims to compare the incidence of gastroesophageal reflux during ventilation through classical shaped vs tulip shaped glottis mask airway.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
TRIPLE
Enrollment
72
the glottis mask airway is used for maintaining ventilation during general anesthesia
the tulip shaped mask airway is with a tulip shaped tip
the classical shaped mask airway is with a water-drop shaped tip
Xijing Hospital, Air Force Medical University
Xi'an, Shaanxi, China
pH value of secretion on the tip of glottis mask airway at the end of surgery
Time frame: at the end of surgery
number of participants with a pH value of secretion on the tip of glottis mask airway less than 4.1
Time frame: at the end of surgery
Oropharyngeal leak pressure
Oropharyngeal leak pressure (OLP) was measured by setting the adjustable pressure limiting valve to 40 cmH2O at a fixed gas flow of 3 L/min and noting the steady-state airway pressure on the monitor
Time frame: from insertion of glottis mask airway to start of surgery, at an average of 10 minutes
duration of inserting glottis mask airway
Time frame: from taking of glottis mask airway to inserting it to appropriate position, at an average of 1 minute
number of insertion to achieve successful positioning of glottis mask airway
Time frame: from taking of glottis mask airway to inserting it to appropriate position, at an average of 1 minute
duration of establishing appropriate ventilation
Time frame: from taking of glottis mask airway to inserting it to appropriate position, at an average of 1 minute
incidence of epiglottis suppression
Time frame: from insertion of glottis mask airway to start of surgery, at an average of 10 minutes
number of needs for modulating the position of glottis airway mask during surgery
Time frame: from insertion of glottis mask airway to end of surgery, at an average of 2 hours
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scale of difficulty of inserting gastric tube
0 is for easy to insert; 1 is for a little difficult to insert; 2 is for fail to insert
Time frame: from insertion of glottis mask airway to start of surgery, at an average of 10 minutes
incidence of blood on the tip of glottis airway mask
Time frame: from end of surgery to withdrawal of glottis airway mask, at an average of 5 minutes
score of satisfaction of anesthesiologist to glottis airway mask
the score is from 0 to 10, a higher score means higher satisfaction
Time frame: from insertion of glottis mask airway to withdrawal of glottis airway mask, at an average of 2 hours
incidence of glottis airway mask related adverse events by 24 hours after surgery
the glottis airway mask related adverse events include laryngeal pain, horse and dysphonia
Time frame: 24 hours after surgery