Evidence map›Paper›PMID 36818949›Full record

ArticleTurkish journal of emergency medicine

Accuracy of airway ultrasound parameters to predict difficult airway using the LEMON criteria as a reference: A cross-sectional diagnostic accuracy study.

Mehran Sotoodehnia, Najmeh Abbasi, Razman Arabzadeh Bahri, Atefeh Abdollahi, Alireza Baratloo

Registry-linked trialAbstract read
In one paragraph

Article in Turkish journal of emergency medicine. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT07482436 (The Effect of Preoperative and Postoperative Airway Ultrasonography and Different Laryngoscope Uses on Intubation Success and Postoperative Complications in Obese Patients), which is not on this map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from 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.

2 · The registry

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.

NCT07482436 narecruitingnot on this map

The Effect of Preoperative and Postoperative Airway Ultrasonography and Different Laryngoscope Uses on Intubation Success and Postoperative Complications in Obese Patients

TypeinterventionalSponsorTrabzon Kanuni Education and Research HospitalRan2026 to 2026Enrolled180ConditionsCorrelation of Difficult Airway Markers With Ultrasonographic Measurements in Obese PatientsArmsAirway ultrasonography, Macintosh Laryngoscope Intubation, Tuoren Videolaryngoscope Intubation, Besdata Videolaryngoscope Intubation
3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Article
  2. Observational
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Mehran SotoodehniaPrehospital and Hospital Emergency Research Center, Tehran University of Medical Sciences, Tehran, Iran.ORCID 0000-0003-4269-1068
Najmeh AbbasiPrehospital and Hospital Emergency Research Center, Tehran University of Medical Sciences, Tehran, Iran.ORCID 0000-0003-4216-1753
Razman Arabzadeh BahriPrehospital and Hospital Emergency Research Center, Tehran University of Medical Sciences, Tehran, Iran.ORCID 0000-0002-9582-5798
Atefeh AbdollahiPrehospital and Hospital Emergency Research Center, Tehran University of Medical Sciences, Tehran, Iran.ORCID 0000-0002-9746-5909
Alireza BaratlooResearch Center for Trauma in Police Operations, Directorate of Health, Rescue and Treatment, Police Headquarter, Tehran, Iran.ORCID 0000-0002-4383-7738

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesUltrasound (US) airway indexes were frequently compared with other scoring systems such as Mallampati score and Cormack - Lehane classification system, but to the best of our knowledge never with LEMON. Here, in this study, we evaluated the accuracy of some recommended airway US parameters in terms of screening difficult airway using the LEMON criteria as a reference.

methodsThis was a cross-sectional diagnostic accuracy study in which people with at least 18 years old coming to the emergency departments for any reason who had consent for participation, were enrolled with the simple random sampling method. Hyo-mental distance (HMD), skin to epiglottis distance (EP), and peri-epiglottic space to epiglottis to vocal cord ratio (PEP/E. VC) were the US indexes that were calculated in all participants. Using a preprepared checklist, measured US parameters were recorded. For each participant, the LEMON score variables were also assessed and recorded, and the cutoff point for considering as a difficult airway case, based on LEMON score, was 2. Demographic characteristics of the participants were also registered.

resultsA total of 299 cases with a mean age of 41.1 years (95% confidence interval [CI]: 39.3-42.9), were participated. Based on LEMON score ≥2, 20 participants (6.7%) were categorized in difficult airway group. Comparison of the PEP/E. VC (

conclusionAs per our results, PEP/E. VC and EP distance measured with sonography can be used in distinguishing the difficult airway, using the LEMON criteria as the reference. However, further studies are needed to use PEP/E. VC and EP distance as a part of reliable indexes.

Indexed as

Airway managementdifficult airwayintratracheal intubationLEMON scorepredictionultrasonography

Identifiers

PMID36818949
PMCPMC9930393

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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.