SynthesisBritish journal of anaesthesia2022
Videolaryngoscopy versus direct laryngoscopy for adults undergoing tracheal intubation: a Cochrane systematic review and meta-analysis update.
Synthesis in British journal of anaesthesia, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 3 registered trials, which are not on this map. Cited by 64 papers, 7 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
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.
Effect of Providing a Personal McGrath Video Laryngoscope to Anesthesiologists for All Intubations in the Operating Room: a Multicentre Prospective Observational, Before-after Study
A Randomized Comparison Between the Hyperangulated vs. Macintosh Blades for First-attempt Intubation Success With Videolaryngoscopy in ICU Patients.
McGrath X-blade Study
Who cites it
64 citing papers in PubMed, 7 syntheses or guidelines pooled it, 124 citations in OpenAlex.
- Safer prehospital anaesthesia: updated guidelines from the Association of Anaesthetists.Anaesthesia · 2026Guideline
- Efficacy of video laryngoscopy versus direct laryngoscopy for critically Ill adults undergoing tracheal intubation: a trial sequential analysis and meta-analysis.BMC anesthesiology · 2026Pooled it
- Tracheal intubation using video laryngoscopy as compared to direct laryngoscopy during cardiopulmonary resuscitation: a systematic review and meta-analysis.Resuscitation · 2026Pooled it
- Guideline
- Video vs. direct laryngoscopy for tracheal intubation in neonates: a meta-analysis.Frontiers in pediatrics · 2025Pooled it
- Comparing the effectiveness and safety of videolaryngoscopy and direct laryngoscopy for endotracheal intubation in the paediatric emergency department: a systematic review and meta-analysis.Frontiers in medicine · 2024Pooled it
- Awake Versus Asleep Intubation for Mediastinal Goiters: A Systematic Review and Meta-Analysis.Journal of otolaryngology - head & neck surgery = Le Journal d'oto-rhino-laryngologie et de chirurgie cervico-facialePooled it
- AI-assisted videolaryngoscopy improves intubation success: results from a randomized simulation trial.Journal of clinical monitoring and computing · 2026Trial
- Provu video stylet-assisted intubation under direct laryngoscopy and video laryngoscopy in high Arne score patients: a randomized clinical trial.BMC anesthesiology · 2026Trial
- Video laryngoscopy as a teaching tool in direct intubation in undergraduate medical education - a randomized controlled trial.BMC medical education · 2026Trial
- Assessment of prehospital tracheal intubation technique using initial direct laryngoscopy during videolaryngoscopy: randomized controlled simulated trial.BMC emergency medicine · 2025Trial
- A comparison of McGrath MAC, AIRWAY SCOPEBMC anesthesiology · 2025Trial
- Direct versus indirect epiglottis elevation in cervical spine movement during videolaryngoscopic intubation under manual in-line stabilization: a randomized controlled trial.BMC anesthesiology · 2023Trial
- Efficacy of McGRATH®MAC videolaryngoscope blade 1 for tracheal intubation in small children: a randomized controlled clinical study.Journal of anesthesia · 2023Trial
- Comparative analysis of a 3D-printed videolaryngoscope versus the Macintosh model in adult airway management: a randomized clinical trial.Brazilian journal of anesthesiology (Elsevier)Trial
- Clinicians' Perspectives on Pre-Anaesthetic Assessment and Their Attitudes Towards AI-Supported Models: Protocol for an International Survey of Anaesthesia Personnel.Acta anaesthesiologica Scandinavica · 2026Article
- International Consensus on Airway Management Procedures for Distance Simulation: A Delphi Study.Acta anaesthesiologica Scandinavica · 2026Article
- Temporal increases in the rates of videolaryngoscopy use and associated decreases in the rates of difficult intubation between 2016 and 2021.Canadian journal of anaesthesia = Journal canadien d'anesthesie · 2026Article
- Prehospital Airway Management Method as a Predictor of Early and Definitive Survival in Patients After OHCA.Journal of clinical medicine · 2026Article
- Airway coach project: development of a machine learning-based model using clinical and ultrasound parameters to support videolaryngoscopy strategy.BMC anesthesiology · 2026Observational
4 more citing papers are in PubMed but not listed here.
Corrections and comments
- Commented on by
Authors and funding
5 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundTracheal intubation is a commonly performed procedure that can be associated with complications and result in patient harm. Videolaryngoscopy (VL) may decrease this risk as compared with Macintosh direct laryngoscopy (DL). This review evaluates the risk and benefit profile of VL compared with DL in adults.
methodsWe searched MEDLINE, Embase, CENTRAL, and Web of Science on February 27, 2021. We included RCTs comparing VL with DL in patients undergoing tracheal intubation in any setting. We separately compared outcomes according to VL design: Macintosh-style, hyperangulated, and channelled.
resultsA total of 222 RCTs (with 26 149 participants) were included. Most studies had unclear risk of bias in at least one domain, and all were at high risk of performance and detection bias. We found that videolaryngoscopes of any design likely reduce rates of failed intubation (Macintosh-style: risk ratio [RR]=0.41; 95% confidence interval [CI], 0.26-0.65; hyperangulated: RR=0.51; 95% CI, 0.34-0.76; channelled: RR=0.43, 95% CI, 0.30-0.61; moderate-certainty evidence) with increased rates of successful intubation on first attempt and better glottic views across patient groups and settings. Hyperangulated designs are likely favourable in terms of reducing the rate of oesophageal intubation, and result in improved rates of successful intubation in individuals presenting with difficult airway features (P=0.03). We also present other patient-oriented outcomes.
conclusionsIn this systematic review and meta-analysis of trials of adults undergoing tracheal intubation, VL was associated with fewer failed attempts and complications such as hypoxaemia, whereas glottic views were improved. SYSTEMATIC REVIEW REGISTRATION: This article is based on a Cochrane Review published in the Cochrane Database of Systematic Reviews (CDSR) 2022, Issue 4, DOI: 10.1002/14651858.CD011136.pub3 (see www.cochranelibrary.com for information). Cochrane Reviews are regularly updated as new evidence emerges and in response to feedback, and the CDSR should be consulted for the most recent version of the review.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.