Patients were randomly assigned to three supraglottic airway devices (SADs) groups for airway management after anesthesia induced. Fiberoptic bronchoscope (FB) guided glottic exposure grading was performed and other airway management quality was recorded.
Mechanical ventilation was volume controlled and time cycled with tidal volumes (6-8 ml/kg) set to maintain peak inspiratory pressures of less than 20 cm H2O and ventilatory frequency adjusted to maintain end-tidal carbon dioxide (PETCO2) at 35-45 mmHg. Then a fiberoptic bronchoscope was passed through airway tube into the device to perform glottic exposure grading. Peak airway pressure, incidence of pharyngalgia, bleeding, hoarseness, and dysphagia were recorded.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Enrollment
498
Patient in this group received LMA supreme (one of laryngeal airway management device) for airway management during general anesthesia
Patient in this group received I-gel laryngeal (one of laryngeal airway management device) for airway management during general anesthesia
Patient in this group received GMA-Tulip (one of laryngeal airway management device) for airway management during general anesthesia
Zhejiang Cancer Hospital
Hangzhou, Zhejiang, China
Glottic exposure grading
Fiberoptic bronchoscope (FB) guided glottic exposure grading was performed.
Time frame: From the insertion of supraglottic airway device to the end of surgery.
Peak inspiratory pressures
Record peak airway pressure during surgery.
Time frame: From the insertion of supraglottic airway device to 15 minutes after insertion.
Plateau inspiratory pressures
Record plateau airway pressure during surgery.
Time frame: From the insertion of supraglottic airway device to 15 minutes after insertion.
Oropharyngeal leak pressure
Measure the oropharyngeal leak pressure after insertion of supraglottic airway device
Time frame: From the insertion of supraglottic airway device to 30 minutes after insertion
Oropharyngeal leak pressure at 30 and 45 degrees of head rotation
Measure the oropharyngeal leak pressure at 30 and 45 degrees of head rotation after insertion of supraglottic airway device
Time frame: From the insertion of supraglottic airway device to 30 minutes after insertion
Ventilation quality
Record the ventilation quality after the insertion of supraglottic airway device. In specific, The Ventilation Quality Score consists of three components: presence of normal CO₂ waveform, bilateral symmetrical chest rise, and absence of air leak at 20 mmHg airway pressure. Total scores range 0-3, with 0 indicating poor ventilation quality and 3 representing optimal ventilation.
Time frame: From the insertion of supraglottic airway device to 15 minutes after insertion
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.
Abnormally ventilation events during surgery
Record the abnormally ventilation events (air leakage, abnormal carbon dioxide wave, higher airway pressure, hypoxemia, supraglottic airway device adjustment, change into intubation) during surgery
Time frame: From the insertion of supraglottic airway device to the end of surgery
Side effects at the end of surgery
Record side effects (blooding on the supraglottic airway device, pharyngalgia, hoarseness) at the end of surgery.
Time frame: From the insertion of supraglottic airway device to the patient's transfer to the ward. An average of 3 hours.
Side effects and adverse events 24 hours after surgery
Record side effects (pharyngalgia, hoarseness, cough when drinking), and adverse events (pneumonia, hypoxemia) 24 hours after surgery.
Time frame: Postoperative day 1.
Nasogastric tube insertion success rate
Record the nasogastric tube insertion success rate
Time frame: From the initial insertion to the successful placement of nasogastric tube. An average of 20 minutes.
Nasogastric tube insertion attempts
Record the number of attempts for nasogastric tube insertion
Time frame: From the initial supraglottic airway device insertion to the successful placement of nasogastric tube. An average of 20 minutes.
Nasogastric tube insertion time
Record the duration (seconds from insertion initiation to successful placement) of nasogastric tube insertion
Time frame: From the initial supraglottic airway device insertion to the successful placement of nasogastric tube. An average of 20 minutes.
Nasogastric tube insertion difficulty
Record the insertion difficulty (1-3 scale; 1=easy, 3=difficult) of nasogastric tube placement
Time frame: From the initial supraglottic airway device insertion to the successful placement of nasogastric tube. An average of 20 minutes.
Reflux or aspiration risk
Record gas/fluid volume during the surgery
Time frame: From the insertion of s SAD to the end of surgery. An average of 3 hours.
Supraglottic airway device insertion duration
Record the insertion duration (seconds from insertion initiation to successful placement) of SADs
Time frame: From the mouth open to the device seated upon encountering resistance, averaging approximately 10 seconds.
Supraglottic airway device insertion difficult
Record the insertion difficulty (1-3 scale; 1=easy, 3=difficult) of SADs
Time frame: From the mouth open to the device seated upon encountering resistance, averaging approximately 10 seconds.
Supraglottic airway device insertion times
Record the number of SAD insertion attempts.
Time frame: From the mouth open to the device seated upon encountering resistance or able to ventilation after device's adjustment/reinsertion, averaging approximately 10 seconds.