Changes in Pediatric-Sized Endotracheal Tube Cuff Pressure With Elevation Gain: Observations in Ex Vivo Simulations and In Vivo Air Medical Transport.

Abstract:

OBJECTIVES:Prolonged excessive endotracheal cuff pressure greater than 30 cmH2O is thought to cause ischemic airway injury. Excessive cuff pressure with altitude gain during air medical transport has been previously described in adult patients. It is poorly understood how pediatric-sized endotracheal tube (ETT) cuffs behave with atmospheric pressure change during flight. METHODS:In ex vivo models 4.0, 6.0, and 8.0, ETTs restricted within scaled syringe tubing were inflated to 20 cmH2O. Pressure was measured against 1500 ft elevation gain in ground and flight models. In an in vivo observation of pediatric patient transport, change in cuff pressure was measured between takeoff and helicopter peak flight altitudes. RESULTS:In the ex vivo ground model, endotracheal cuff pressure increased linearly with altitude and exceeded 40 cmH2O in all tube sizes. Comparable pressure change was demonstrated in the flight model. No difference was demonstrated in the degree of pressure change between ETT sizes. In the in vivo observations during patient transport, pressure increase was consistent with that seen in the ex vivo models. CONCLUSIONS:Children who are intubated with cuffed ETTs for air medical transport are subject to excessive endotracheal cuff pressure at even low flight altitudes. Endotracheal tube size did not affect the degree of cuff pressure change, contrary to previous study. These findings need to be validated and correlated to patient clinical outcomes. The implications of these data need to be considered clinically particularly for prolonged transport of intubated pediatric patients at elevation.

journal_name

Pediatr Emerg Care

journal_title

Pediatric emergency care

authors

Long MT,Cvijanovich NZ,McCalla GP,Flori HR

doi

10.1097/PEC.0000000000000755

subject

Has Abstract

pub_date

2018-08-01 00:00:00

pages

570-573

issue

8

eissn

0749-5161

issn

1535-1815

journal_volume

34

pub_type

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