Evidence map›Paper›PMID 41580650›Full record

Observational studyBMC anesthesiology2026

Using ultrasonographic skin-to-vocal-cord distance measurements to predict difficult intubation in obese Thai patients: a prospective observational study.

Santi Anchalee, Nalinee Kovitwanawong, Thitaporn Saetung, Sumidtra Prathep, Prae Plansangkate, Chawanakorn Samakom, Panaya Mitchouyrod

Abstract readObservational Study
PubMed Full text at PMC Publisher
In one paragraph

Observational study in BMC anesthesiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing 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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

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

7 authors.

Santi AnchaleeDepartment of Anesthesiology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand.
Nalinee KovitwanawongDepartment of Anesthesiology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand.
Thitaporn SaetungDepartment of Anesthesiology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand.
Sumidtra PrathepDepartment of Anesthesiology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand. prathepsumidtra@gmail.com.
Prae PlansangkateDepartment of Anesthesiology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand.
Chawanakorn SamakomDepartment of Anesthesiology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand.
Panaya MitchouyrodDepartment of Anesthesiology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThis study aimed to evaluate the prediction of difficult intubation using ultrasonographic skin-to-vocal-cord measurements in obese Thai patients undergoing elective general anesthesia.

methodsThis prospective observational study was conducted from December 2020 to June 2023. Total 90 obese patients (body mass index ≥ 30 kg/m

resultsThe incidence of difficult laryngoscopy was 13.33% (12/90 patients). The median (interquartile range) body mass index in the difficult and easy intubation groups was 44.7 kg/m

conclusionsIn obese Thai patients, A skin-to-vocal-cord distance of ≥ 19.2 mm measured by ultrasonography was associated with difficult laryngoscopy and remained consistent across sensitivity analyses. These factors may help predict difficult intubation. However, the modest diagnostic performance suggests that DSVC should not be used as a standalone predictor.

trial registrationThai Clinical Trials Registry (TCTR20250616007); registered on June 16, 2025.

Indexed as

Intubation, IntratrachealLaryngoscopyObesitySkinAdolescentAdultAnesthesia, GeneralBody Mass IndexFemaleHumansMaleMiddle AgedProspective StudiesThailandUltrasonographyYoung AdultAirway managementBody mass indexIntubation, intratrachealLaryngoscopyObesityUltrasonography

Identifiers

PMID41580650
PMCPMC12911043

What OpenQuestion holds

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LicenceCC BY-NC-ND
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Registered trials

None linked

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.