Anaes Vivas · Airway management
Data viva — first- versus second-generation supraglottic airway devices
A data viva on the comparative table of supraglottic airway devices. Covers the first- versus second-generation distinction (the gastric drainage channel and the higher seal pressure), the i-gel non-inflatable cuff, the intubating LMA as a fibreoptic-guided conduit for intubation, the uses (routine, guideline rescue, bridge, CPR and prehospital, paediatric), the disadvantages and contraindications, and the guideline rescue decision that turns on oxygenation.
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A four-column table comparing the supraglottic airway devices the candidate is expected to know together. Each column shows a cross-section of the device seated over the laryngeal inlet, with the cuff highlighted and the gastric tube drawn where present. Column 1 is the classic LMA (first generation): an inflatable silicone cuff, a single airway tube, NO gastric drainage channel, and the lowest seal pressure of the family. Columns 2 to 4 are the second-generation devices: the ProSeal LMA (a deeper posterior cuff plus a separate gastric drainage tube, higher seal), the LMA Supreme (a rigid, curved, single-use tube with a gastric channel), and the i-gel (a non-inflatable cuff with an integral gastric channel). A footnote arrow marks the intubating LMA (Fastrach) as a separate conduit device, not shown in the main table.
References10ShowHide
- [1]Yin X, et al. Gastric tube placement through the drainage channel of second-generation supraglottic airway devices. Front Surg, 2026.PMID 42344572
- [2]Migliorelli S, et al. Clinical Evaluation of a Non-inflatable Visual Laryngeal Mask Airway. Cureus, 2026.PMID 42291977
- [3]Gan Z, et al. The Median Effective Concentration of Sevoflurane for I-Gel LMA Insertion in Children. Pediatr Discov, 2026.PMID 42021953
- [4]Black KM, et al. Anesthesia Care, Complications, and Airway Management for Spinal Muscular Atrophy. Anesth Analg, 2026.PMID 42363899
- [5]Ghaffar S, et al. Physiological difficult airway management in the emergency department. JPMA, 2026.PMID 42363338
- [6]Frerk C, et al. Difficult Airway Society 2015 guidelines for management of unanticipated difficult intubation in adults. Br J Anaesth, 2015.PMID 26556848
- [7]Cook TM, et al. Major complications of airway management in the UK: results of the Fourth National Audit Project of the Royal College of Anaesthetists and the Difficult Airway Society. Part 2: intensive care and emergency departments. Br J Anaesth, 2011.PMID 21447489
- [8]Lai CJ, et al. Comparison of the efficacy of supraglottic airway devices in low-risk adult patients: a network meta-analysis and systematic review. Sci Rep, 2021.PMID 34301986
- [9]Mihara T, et al. A network meta-analysis of the clinical properties of various types of supraglottic airway device in children. Anaesthesia, 2017.PMID 28737223
- [10]Lim WY, et al. Awake supraglottic airway guided flexible bronchoscopic intubation in patients with anticipated difficult airways. Korean J Anesthesiol, 2019.PMID 31475506