SynthesisFrontiers in medicine2021
Useful Ultrasonographic Parameters to Predict Difficult Laryngoscopy and Difficult Tracheal Intubation-A Systematic Review and Meta-Analysis.
Synthesis in Frontiers in medicine, 2021. 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 34 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.
the Preoperative Use of Ultrasound in Airway Assessment in Critically Ill Obstetrics With Pre-eclampsia; Comparison Between Two Ultrasound Techniques in Relation to the Standard Clinical Assessment
Ultrasound Airway Examination as a Tool for Detection of Difficult Intubation in Adult Patients
Impact of Airway Ultrasound Measurements on the Success of Videolaryngoscopy in Predicting Difficult Airway
Who cites it
34 citing papers in PubMed, 69 citations in OpenAlex.
- Evaluation of Airway Assessment Parameters: Hyomental Distance versus Ultrasound-guided Pretracheal Tissue Thickness as Predictors of Difficult Laryngoscopy.Annals of African medicine · 2026Observational
- Airway Ultrasound: Applications in Pediatric Anesthesiology and Critical Care.Journal of clinical medicine research · 2026Review
- Comparison of Focused Upper Airway Ultrasonographic and Anthropometric Measurements for Predicting Difficult Intubation: A Prospective Observational Study.Medicina (Kaunas, Lithuania) · 2026Observational
- Airway coach project: development of a machine learning-based model using clinical and ultrasound parameters to support videolaryngoscopy strategy.BMC anesthesiology · 2026Observational
- Article
- Point-of-Care Ultrasound in Airway Management.Journal of clinical medicine · 2026Review
- Using ultrasonographic skin-to-vocal-cord distance measurements to predict difficult intubation in obese Thai patients: a prospective observational study.BMC anesthesiology · 2026Observational
- An ultrasound-based artificial intelligence framework for difficult airway prediction: A two-model, three-step decision framework.PloS one · 2026Article
- Article
- 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
- Article
- Evaluation of anthropometric and ultrasonographic measurements with different machine learning methods in predicting difficult intubation: a prospective observational study.BMC anesthesiology · 2025Observational
- Clinical roles of point-of-care ultrasonography in airway management.Anesthesia and pain medicine · 2025Review
- Evaluation of the predictive value of tongue height to oral cavity height ratio and anterior neck soft tissue measurements for difficult laryngoscopy in patients with unanticipated difficult airway: A prospective observational study.Indian journal of anaesthesia · 2025Article
- Airway Ultrasound: A Narrative Review of Present Use and Future Applications in Anesthesia.Healthcare (Basel, Switzerland) · 2025Review
- Artificial intelligence for difficult airway assessment: a protocol for a systematic review with meta-analysis.BMJ open · 2025Article
- Comparison between El-Ganzouri risk index and sonologically measured skin-to-epiglottis distance for predicting difficult laryngoscopy: A prospective observational study.Indian journal of anaesthesia · 2025Article
- Ultrasound-Measured Skin-to-Epiglottis Distance as a Predictor of Difficult Intubation in Obese Patients: A Prospective Observational Study.Journal of clinical medicine · 2025Article
- Airway ultrasound.BJA education · 2025Review
- Preoperative point-of-care neck ultrasound: beyond the airway.Journal of ultrasound · 2024Observational
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
9 authors at 3 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Unexpected difficult airway management can cause significant morbidity and mortality in patients admitted for elective procedures. Ultrasonography is a promising tool for perioperative airway assessment, nevertheless it is still unclear which sonographic parameters are useful predictors of difficult laryngoscopy and tracheal intubation. To determine the ultrasonographic predictors of a difficult airway that could be applied for routine practice, a systematic review and meta-analysis was conducted. Literature search was performed on PubMED, Web of Science and Embase using the selected keywords. Human primary studies, published in English with the use of ultrasonography to prediction of difficult laryngoscopy or tracheal intubation were included. A total of 19 articles (4,570 patients) were analyzed for the systematic review and 12 articles (1,141 patients) for the meta-analysis. Standardized mean differences between easy and difficult laryngoscopy groups were calculated and the parameter effect size quantified. A PRISMA methodology was used and the critical appraisal tool from Joanna Briggs Institute was applied. Twenty-six sonographic parameters were studied. The overall effect of the distance from skin to hyoid bone (
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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.