Trial reportScientific reports2023
Tongue retraction using a McIvor blade improves airway condition during fiberoptic intubation: a randomized controlled trial.
Trial report in Scientific reports, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
2 citing papers in PubMed, 0 citations in OpenAlex.
- Comment on "Efficacy of inserting a flexible bronchoscope to a predetermined depth for orotracheal intubation by inexperienced personnel: a randomized-controlled study".Journal of anesthesia · 2026Article
- Lingual Traction and the Lateral Decubitus Position Facilitate Awake Fiberoptic Oral Intubation in a Patient With Ehlers-Danlos Syndrome (Hypermobile Type) and Craniocervical Fixation: A Case Report.Case reports in anesthesiology · 2026Article
Corrections and comments
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Authors and funding
7 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Airway clearance is crucial for successful fiberoptic intubation. We hypothesized that tongue retraction using a McIvor blade could facilitate fiberoptic intubation. This randomized clinical trial aimed to compare intubation time and airway condition between the jaw thrust maneuver and tongue retraction with the McIvor blade during fiberoptic intubation. Ninety-four adult patients scheduled for elective surgery were randomly assigned to one of two groups. During fiberoptic intubation, airway clearance was secured by applying the jaw-thrust maneuver (J group) or by tongue retraction using the McIvor blade (M group). We assessed the total intubation time, number of attempts for tube advancement, and airway clearance at the soft palate and epiglottis levels. The total intubation time was significantly shorter in the M group than in the J group (p = 0.035). The number of attempts to advance the tube was significantly lower in the M group (p = 0.033). Airway clearance at the soft palate level was significantly better in the M group than in the J group (p = 0.027). Retracting the tongue with the McIvor blade demonstrated a better condition for fiberoptic intubation and shortened total intubation time compared with the jaw-thrust maneuver.Clinicalregistiration: CRIS; http://cris.nih.go.kr (KCT0002392) registered 28/07/2017.
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