Trial reportCanadian journal of anaesthesia = Journal canadien d'anesthesie2025
Forearm support to reduce dental contact during direct laryngoscopy: a randomized crossover trial.
Trial report in Canadian journal of anaesthesia = Journal canadien d'anesthesie, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05495880 (Forearm-Supported Head Extension to Decrease Dental Contact Between Laryngoscope Blade and Maxillary Incisors During Direct Laryngoscopy), which is not on this 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.
Forearm-Supported Head Extension to Decrease Dental Contact Between Laryngoscope Blade and Maxillary Incisors During Direct Laryngoscopy
Who cites it
2 citing papers in PubMed.
- In Reply: Forearm support to reduce dental contact during direct laryngoscopy: a randomized crossover trial.Canadian journal of anaesthesia = Journal canadien d'anesthesie · 2026Article
- Comment on: Forearm support to reduce dental contact during direct laryngoscopy: a randomized crossover trial.Canadian journal of anaesthesia = Journal canadien d'anesthesie · 2026Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
10 authors.
Funding
Abstract
purposeTraumatic dental injury is a common complication of tracheal intubation. We aimed to compare the incidence of dental contact during laryngoscopy between the conventional technique and a novel technique that maintains head extension using the practitioner's left forearm or elbow to support the patient's forehead.
methodsWe conducted a single-centre randomized crossover trial in 84 adult patients who were scheduled for elective surgery requiring tracheal intubation. Each patient underwent both the novel and conventional laryngoscopy techniques in a randomized sequence. The primary outcome was the incidence of dental contact during direct laryngoscopy. Secondary outcomes included blade-to-tooth distance, angle of head extension, percentage of glottic opening (POGO) score, and POGO scores of 4 or 5.
resultsThe novel technique significantly reduced the incidence of dental contact compared with the conventional technique (44/84 [52%] vs 65/84 [77%]; P < 0.001). Additionally, the novel technique achieved a longer blade-to-tooth distance (median difference [interquartile range (IQR)], 0 [0-1] mm; P = 0.001), wider angle of head extension (mean difference, 4.5°; 95% confidence interval, 2.1 to 6.8; P < 0.001), higher POGO score (median difference [IQR], 1 [0-1]; P = 0.003), and higher proportion of POGO scores of 4 or 5 (75/84 [89%] vs 61/84 [73%]; P = 0.01).
conclusionsCompared with conventional laryngoscopy, a novel laryngoscopy technique that maintains head extension using the practitioner's left forearm or elbow to support the patient's forehead significantly reduced the risk of dental contact, increased the blade-to-tooth distance and the angle of head extension, and provided better glottic visualization. This simple, effective approach can reduce the risk of traumatic dental injury and improve safety during direct laryngoscopy. STUDY REGISTRATION: https://www. CLINICALTRIALS: gov ( NCT05495880 ); first submitted 8 August 2022.
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