Pediatric anesthesia & critical care
Effectiveness of substantial shortening of the endotracheal tube for decreasing airway resistance and increasing tidal volume during pressure-controlled ventilation in pediatric patients: a prospective observational study
Authors' conclusion
The effectiveness of ETT shortening on Rtotal and TV was very limited, because the resistance of the slip joint was very large.
Study context
- Population
- Anesthetized children under constant pressure-controlled ventilation
- Participants
- 22 participants
- Exposure
- Before vs after shortening a cuffed ETT
- Outcome
- Total airway resistance (Rtotal) and tidal volume (TV) before and after ETT shortening
Methodological detailslaboratory experiment
- Laboratory experiment
Main finding
As reported in the abstract
Rtotal and TV
- Median tidal volume (TV) increased after ETT shortening
- 6%
- Median ETT percent shortening
- 21.7%
Observational data: associations, not effects.
Further findings
Laboratory experiment: pressure gradient across ETT
- Share of pressure gradient across original-length ETT generated by the slip joint (approximately)
- 40%
- ETT length and pressure gradient linearly related under a certain flow rate
RETT/Rtotal ratio
- Median RETT/Rtotal ratio
- 0.69
Parts of this Brief are withheld: the automatic checks could not confirm them against the abstract.
Original publication
Effectiveness of substantial shortening of the endotracheal tube for decreasing airway resistance and increasing tidal volume during pressure-controlled ventilation in pediatric patients: a prospective observational study. J Clin Monit Comput. Published 8 June 2023. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →