A randomized equivalence trial comparing the i-gel and laryngeal mask airway Supreme in children
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Updated: May 16, 2026

Laryngeal Mask Airway (LMA) Placement in a Neonatal Patient Simulator Using a Non-Inflatable Supraglottic Airway (SGA)
Published on: July 14, 2023
Narasimhan Jagannathan1, Katherine Sommers, Lisa E Sohn
1Department of Pediatric Anesthesia, Ann & Robert H. Lurie Children's Hospital of Chicago, Northwestern University's Feinberg School of Medicine, Chicago, IL 60611, USA. simjag2000@yahoo.com
Insights
The i-gel supraglottic device offers higher airway leak pressures compared to the Laryngeal Mask Airway Supreme in children. Both devices are effective for airway maintenance, with the Supreme showing faster gastric tube insertion times.
Area of Science:
- Anesthesiology
- Pediatric Airway Management
- Medical Devices
Background:
- The Laryngeal Mask Airway Supreme (Supreme) is a single-use supraglottic airway device with gastric access, available for pediatric use.
- Supraglottic airway devices are crucial for maintaining a patent airway during anesthesia in children.
Purpose of the Study:
- To compare the efficacy and safety of the i-gel supraglottic device versus the Laryngeal Mask Airway Supreme in pediatric patients.
- To evaluate key performance metrics including airway leak pressure, insertion characteristics, and complication rates.
Main Methods:
- A randomized controlled trial involving 170 children (3 months to 11 years) undergoing routine airway maintenance.
- Patients were allocated to either the i-gel or the Supreme group.
- Primary outcome was airway leak pressure; secondary outcomes included insertion time, success rate, gastric tube placement, and complications.
Main Results:
- The i-gel demonstrated significantly higher airway leak pressures (20 cm H2O) compared to the Supreme (17 cm H2O) (P=0.001).
- Insertion time, view quality, and complication rates were similar between the two devices.
- The Supreme facilitated faster gastric tube insertion (12s) than the i-gel (14s) (P=0.01), and fewer airway manipulations were needed with the Supreme.
Conclusions:
- The i-gel is a viable alternative to the Laryngeal Mask Airway Supreme for pediatric airway management when gastric access is needed.
- Both devices provide effective airway maintenance, but the i-gel offers superior sealing capabilities.
Background:
The laryngeal mask airway Supreme (Supreme) is a new single-use supraglottic device with gastric access capability now available in all sizes for children.
Objectives:
To compare the i-gel with the Supreme in children for routine airway maintenance.
Materials/Methods:
One hundred and seventy children, aged 3 months to 11 years, 5-50 kg in weight, were randomly assigned to receive either the i-gel or the Supreme. The primary outcome measured was airway leak pressure. Secondary outcomes included the following: ease and time for insertion, insertion success rate, fiberoptic grade of view, ease of gastric tube placement, number of airway manipulations, quality of airway during anesthetic maintenance, and complications.
Results:
A total of 168 patients were assessed for the outcomes. The median (IQR [range]) airway leak pressure for the i-gel was higher than with the Supreme, 20 (18-25 [9-40]) cm H(2)O vs 17 (14-22 [10-40]) cm H(2)O, respectively (P = 0.001). There were no differences in the time for device insertion, fiberoptic grade of view, quality of airway, and complications. Median (IQR[range]) time of successful insertion of a gastric tube was faster with the Supreme, 12 (9.2-14.3 [5.2-44.2]) s than with the i-gel, 14 (11.9-19 [6.9-75]) s; P = 0.01. The number of airway manipulations during placement was higher with the i-gel than with the laryngeal mask airway Supreme (12 vs 13 patients), P = 0.02.
Conclusions:
In infants and children, when a single-use supraglottic device with gastric access capabilities is required, the i-gel demonstrated higher airway leak pressures and can be a useful alternative to the Supreme.
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