ArticleAnesthesia and analgesia1996
Preoperative airway assessment: predictive value of a multivariate risk index.
Article in Anesthesia and analgesia, 1996. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 4 registered trials, which are not on this map. Cited by 150 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.
GlideScope Videolaryngoscopy and Pre-Operative Assessment of El-Ganzouri Risk Index for Tracheal Intubation in Morbidly Obese Patients The Prospective Observational GLOBE Study
Determination of Factors Leading to Failure of Videolaryngoscopy
Comparison of Various Measures for Anticipating Difficult Laryngoscopy in Turkish Population: An Observational Study
Clinical Outcomes of Intubation Techniques in Anesthesia; an Observational Study.
Who cites it
150 citing papers in PubMed, 7 syntheses or guidelines pooled it.
- Evaluation of preoperative difficult airway prediction methods for adult patients without obvious airway abnormalities: a systematic review and meta-analysis.BMC anesthesiology · 2024Pooled it
- Airway physical examination tests for detection of difficult airway management in apparently normal adult patients.The Cochrane database of systematic reviews · 2018Pooled it
- Avoidance versus use of neuromuscular blocking agents for improving conditions during tracheal intubation or direct laryngoscopy in adults and adolescents.The Cochrane database of systematic reviews · 2017Pooled it
- Obstetric Anaesthetists' Association and Difficult Airway Society guidelines for the management of difficult and failed tracheal intubation in obstetrics.Anaesthesia · 2015Guideline
- The difficult airway with recommendations for management--part 1--difficult tracheal intubation encountered in an unconscious/induced patient.Canadian journal of anaesthesia = Journal canadien d'anesthesie · 2013Guideline
- The difficult airway with recommendations for management--part 2--the anticipated difficult airway.Canadian journal of anaesthesia = Journal canadien d'anesthesie · 2013Guideline
- Glidescope® video-laryngoscopy versus direct laryngoscopy for endotracheal intubation: a systematic review and meta-analysis.Canadian journal of anaesthesia = Journal canadien d'anesthesie · 2012Pooled it
- A visual laryngoscope combined with a fiberoptic bronchoscope improves intubation outcomes in patients with predicted difficult airways in thoracic surgery.BMC pulmonary medicine · 2024Trial
- A Comparison of the Effectiveness of the McCoy Laryngoscope and the C-MAC D-Blade Video Laryngoscope in Obese Patients.Medicina (Kaunas, Lithuania) · 2024Trial
- A comparative evaluation of fibreoptic bronchoscopy versus C-MACCanadian journal of anaesthesia = Journal canadien d'anesthesie · 2024Trial
- Trial
- Vie Scope® versus videolaryngoscopy in expected difficult airways: a randomized controlled trial.Canadian journal of anaesthesia = Journal canadien d'anesthesie · 2023Trial
- Video laryngoscope versus USB borescope-aided endotracheal intubation in adults with anticipated difficult airway: a prospective randomized controlled study.Korean journal of anesthesiology · 2022Trial
- A randomized controlled comparison of non-channeled king vision, McGrath MAC video laryngoscope and Macintosh direct laryngoscope for nasotracheal intubation in patients with predicted difficult intubations.BMC anesthesiology · 2019Trial
- Thyromental height test as a new method for prediction of difficult intubation with double lumen tube.PloS one · 2018Trial
- Improved success rates using videolaryngoscopy in unexperienced users: a randomized crossover study in airway manikins.European journal of medical research · 2017Trial
- McGrath Series 5 videolaryngoscope vs Airtraq DL videolaryngoscope for double-lumen tube intubation: A randomized trial.Medicine · 2016Trial
- Lingual traction to facilitate fiber-optic intubation of difficult airways: a single-anesthesiologist randomized trial.Journal of anesthesia · 2015Trial
- Detailed statistical analysis plan for the difficult airway management (DIFFICAIR) trial.Trials · 2014Trial
- Trial
90 more citing papers are in PubMed but not listed here.
Corrections and comments
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Using readily available and objective airway risk criteria, a multivariate model for stratifying risk of difficult endotracheal intubation was developed and its accuracy compared to currently applied clinical methods. We studied 10,507 consecutive patients who were prospectively assessed prior to general anesthesia with respect to mouth opening, thyromental distance, oropharyngeal (Mallampati) classification, neck movement, ability to prognath, body weight, and history of difficult tracheal intubation. After induction of anesthesia, the laryngeal view during rigid laryngoscopy was graded and the ability of experienced anesthesia personnel to ventilate via a mask was determined. Poor intubating conditions (laryngoscopy Grade IV) and inability to achieve adequate mask ventilation were identified in 107 (1%) and 8 (0.07%) cases, respectively. Logistic regression identified all seven criteria as independent predictors of difficulty with laryngoscopic visualization. A composite airway risk index (derived from nominalized odds ratios calculated from the multivariate model) as well a simplified (0 = low, 1 = medium, 2 = high) risk weighting exhibited higher positive predictive value for laryngoscopy Grade IV at scores with similar sensitivity to Mallampati class III, as well as higher sensitivity at scores with similar positive predictive value. Compared to Mallampati class I fewer false-negative predictions were observed at a risk index value of 0. We conclude that improved risk stratification for difficulty with visualization during rigid laryngoscopy (Grade IV) can be obtained by use of a simplified preoperative multivariate airway risk index, with better accuracy compared to oropharyngeal (Mallampati) classification at both low- and high-risk levels.
Indexed as
Identifiers
8638791What 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.