An observational study in Airway Assessment, sponsored by Prince of Songkla University. Completed at 1 site in Thailand. Open to participants aged 18 Years to 60 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-10-22.
Sponsored by Prince of Songkla University · Observational
Hand-dimensions of 64 airway assessment personnel were measured by one investigator using a vernier caliper. These personnel assessed the thyromental distance and inter-incisor gap of 15 pseudo-patients in a fully crossed design following normal practice. They then measured these parameters using a vernier caliper. Inter-assessor variability using the same pseudo-patient was then compared between measurements based on raw fingerbreadths, fingerbreadths adjusted for hand size, and vernier caliper.
A sample of personnel who may need to undertake airway assessment of patients scheduled for intratracheal intubation was enrolled and their hand measurements taken. Each assessor was requested to make the 4 airway assessments, TMD, ICG, Mallampati grade and upper lip bite test on each of a group of volunteers. The TMD and ICG were measured first using fingerbreadths and then making measurements using a vernier caliper. Agreement between raw and hand size adjusted fingerbreadth measurements and vernier measurements of TMD and ICG were evaluated, and inter-assessor variation using each of the measurement/grading methods assessed
Prince of Songkla University is the lead sponsor of 116 studies on the registry; 13 are open to participants now.
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Sixty-four persons are recruited as assessors from among the hospital personnel who would at times need to make airway assessments.
Fifteen volunteers were purposively selected from among male and female faculty staff to act as pseudo-patients on whom airway assessments were to be made.
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Exclusion Criteria:
Sixty-four persons were recruited as assessors from among the hospital personnel who would at times need to make airway assessments. They included 9 attending anaesthesiologists, 20 nurse anaesthetists, 18 anaesthesia residents and 17 nurse anaesthetist students. The instruction on the use of a vernier caliper was oriented to all participants before the study was begun. Basic characteristics of each assessor (age, sex, height, weight, hand-dominance) were determined and recorded.
Diagnostic Test: the caliper venier will be used to measure the airway.
Fifteen volunteers were purposively selected from among male and female faculty staff to act as pseudo-patients on whom airway assessments were to be made.
Diagnostic Test: the caliper venier will be used to measure the airway.
the vernier calipers were applied with only light pressure so that the soft tissue of the hand was not indented. Each measurement was made three times and the mean dimension calculated.
Discrepancy of airway assessment for intubation
Inter-assessor variability
Time frame: From enrollment to the end of measurement at 8 weeks
Plan to share: No — I would share after I finish the analysis.
No publications or documents are linked to this record.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
This study is completed, as verified in Oct 2026. You cannot join it, but the record below documents what was studied.
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