Our study aimed to compare the gastric insufflation volume between Ambu AuraGain and i-gel and its relationship with the oropharyngeal sealing pressure and the incidence of postoperative complications in generally anesthetized controlled-ventilated pediatric patients undergoing elective orthopedic operations.
Supraglottic Airway Devices (SADs) refer to a wide range of medical devices that can act as a passageway for oxygenation, ventilation, and administration of anesthetic gases and may be deemed an alternative to Endotracheal Tubes (ETTs). Oropharyngeal sealing pressure (OLP) provides insight into the risk of gastric insufflation and aspiration risk. It is considered a measure of adequate performance and successful placement based on the premise that the SAD is sited properly in the hypopharynx after blind placements, and it is a useful comparator between SADs.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
60
Ambu Auragain was inserted after induction.
The I-gel device was inserted after induction.
Tanta University
Tanta, El-Gharbia, Egypt
RECRUITINGGastric antrum cross-sectional area (CSA)
Gastric antrum cross-sectional area (CSA) was measured before induction of general anesthesia, before supraglottic airway devices (SAD) insertion, after Ryle's tube insertion, and at the end of surgery before SAD removal.
Time frame: At the end of surgery before supraglottic airway devices removal (5 min)
Oropharyngeal leak pressure
Oropharyngeal leak pressure was determined after confirmation of adequate device insertion and secure taping by closing the adjustable pressure-limiting (APL) valve with a fresh gas flow of 3 l/min and observing the airway pressure at which equilibrium was attained in the aneroid manometer (airway pressure was not allowed to exceed 40cmH2O) or when there was audible air leak from the throat which was auscultated in the neck with a stethoscope placed just beside the thyroid cartilage.
Time frame: Intraoperatively
Time of insertion of supraglottic airway devices
Insertion time was measured in seconds and counted from the time of opening the jaw to the appearance of the capnography waveform.
Time frame: Intraoperatively
Number of attempts for insertion
Three insertion attempts were allowed. Each 'attempt' was defined as reinsertion of the airway device into the mouth. Insertion failure of the device was defined as greater than three unsuccessful attempts or if the entire process of insertion exceeded 120 seconds.
Time frame: Intraoperatively
Incidence of postoperative complications
Incidence of postoperative complications such as mucosal injury, laryngeal spasm, hoarseness, nausea and vomiting were recorded.
Time frame: 24 hours postoperatively
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