Characteristics of lower airway parameters in an adult Asian population related to endotracheal tube design: a cadaveric study
Issued Date
2024-03-13
Resource Type
eISSN
20452322
Scopus ID
2-s2.0-85187731050
Pubmed ID
38480779
Journal Title
Scientific reports
Volume
14
Issue
1
Rights Holder(s)
SCOPUS
Bibliographic Citation
Scientific reports Vol.14 No.1 (2024) , 6137
Suggested Citation
Turbpaiboon C., Kasemassawachanont A., Wankijcharoen J., Thusneyapan K., Khamman P., Patharateeranart K., Amornsitthiwat R., Numwong T., Chaikittisilpa N., Kiatchai T. Characteristics of lower airway parameters in an adult Asian population related to endotracheal tube design: a cadaveric study. Scientific reports Vol.14 No.1 (2024) , 6137. doi:10.1038/s41598-024-56504-5 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/97720
Title
Characteristics of lower airway parameters in an adult Asian population related to endotracheal tube design: a cadaveric study
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Abstract
The risk of endotracheal tube (ETT) placement includes endobronchial intubation and subglottic injury. This study aimed to describe the lengths of lower airway parameters related to cuff location and vocal cord markings in different adult-sized ETTs. Eighty cadavers were examined for the lengths of the lower airway, including their correlations and linear regressions with height. Thirty adult-sized ETTs from seven different brands were examined for Mark-Cuff and Mark-Tip distances. The depth of ETT placement was simulated for each brand using vocal cord marking. The mean (standard deviation) lengths from the subglottis, trachea, vocal cord to mid- trachea, and vocal cord to carina were 24.2 (3.5), 97.9 (8.6), 73.2 (5.3), and 122.1 (9.0) mm, respectively. Airway lengths were estimated as: (1) subglottis (mm) = 0.173 * (height in cm) - 3.547; (2) vocal cord to mid-trachea (mm) = 0.28 * (height in cm) + 28.391. There were variations in the Mark-Cuff and Mark-Tip distances among different ETTs. In the simulation, endobronchial intubation ranged between 2.5 and 5% and the cuff in the subglottis ranged between 2.5 and 97.5%. In summary, the lower airway parameters were height-related. ETT placement using vocal cord marking puts the patient at a high risk of cuff placement in the subglottis.