2018
DOI: 10.1111/pan.13353
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Distances from vocal cords to mid‐trachea for optimizing endotracheal tubes depth markers according to gestational age

Abstract: The linear relationship between laryngo-tracheal size and gestational age offers the opportunity to revise endotracheal tube depth markers for the smallest patients. Trials comparing those suggested markers with those currently in use are needed before implementation.

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Cited by 7 publications
(5 citation statements)
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“…Because of the uncertainties inherent in estimating the vocal cord–carina distance from the present data, we did not attempt to derive a precise recommendation for the redesign of glottic depth marks on ETTs. Nevertheless, our results, in agreement with Balu et al [ 34 ] and further supported by Rigo et al [ 23 ], suggest that inserting the commonly used single-line glottic depth mark to the vocal cord level will place the ETT tip deeper than the mid-trachea, in extremely preterm neonates, and this has significant implications for neonatal intubation practice guidelines.…”
Section: Discussionsupporting
confidence: 92%
See 3 more Smart Citations
“…Because of the uncertainties inherent in estimating the vocal cord–carina distance from the present data, we did not attempt to derive a precise recommendation for the redesign of glottic depth marks on ETTs. Nevertheless, our results, in agreement with Balu et al [ 34 ] and further supported by Rigo et al [ 23 ], suggest that inserting the commonly used single-line glottic depth mark to the vocal cord level will place the ETT tip deeper than the mid-trachea, in extremely preterm neonates, and this has significant implications for neonatal intubation practice guidelines.…”
Section: Discussionsupporting
confidence: 92%
“…The findings of our study are concordant with those of Rigo et al [ 23 ], whose postmortem measurements from 114 fetuses and neonates were used to derive calculations of vocal cord to mid-tracheal length based on gestational age, weight, and length—concluding that gestational age had the best correlation. They also proposed that ETT depth markings should be colored, based on gestational age and weight to ensure optimal positioning.…”
Section: Discussionsupporting
confidence: 92%
See 2 more Smart Citations
“…To generate normative reference values for tracheal length across weight ranges, we used a database containing measurements of airway structures obtained from autopsies of 180 fetuses and infants 27 31. The data were grouped according to weight, and the mean tracheal length and SD were calculated for each weight group.…”
Section: Methodsmentioning
confidence: 99%