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01-01-2019 | Original Article

Work of breathing during HHHFNC and synchronised NIPPV following extubation

Authors: Elinor Charles, Katie A. Hunt, Gerrard F. Rafferty, Janet L. Peacock, Anne Greenough

Published in: European Journal of Pediatrics | Issue 1/2019

Abstract

Our aim was to compare the work of breathing (WOB) during synchronised nasal intermittent positive pressure ventilation (SNIPPV) and heated humidified high flow nasal cannula (HHHFNC) when used as post-extubation support in preterm infants. A randomised crossover study was undertaken of nine infants with a median gestational age of 27 (range 24–31) weeks and post-natal age of 7 (range 2–50) days. Infants were randomised to either SNIPPV or HHHFNC immediately following extubation. They were studied for 2 h on one mode and then switched to the other modality and studied for a further 2-h period. The work of breathing, assessed by measuring the pressure time product of the diaphragm (PTPdi), and thoracoabdominal asynchrony (TAA) were determined at the end of each 2-h period. The infants’ inspired oxygen requirement, oxygen saturation, heart rate and respiratory rate were also recorded. The median PTPdi was lower on SNIPPV than on HHHFNC (232 (range 130–352) versus 365 (range 136–449) cmH₂O s/min, p = 0.0077), and there was less thoracoabdominal asynchrony (13.4 (range 8.5–41.6) versus 36.1 (range 4.3–50.4) degrees, p = 0.038).

Conclusion: In prematurely born infants, SNIPPV compared to HHHFNC post-extubation reduced the work of breathing and thoracoabdominal asynchrony.

What is Known: • The work of breathing and extubation failure are not significantly different in prematurely-born infants supported by HHHFNC or nCPAP. • SNIPPV reduces inspiratory effort and increases tidal volume and carbon dioxide exchange compared to nCPAP in prematurely born infants.
What is New: • SNIPPV, as compared to HHHFNC, reduced the work of breathing in prematurely-born infants studied post-extubation. • SNIPPV, as compared to HHHFNC, reduced thoracoabdominal asynchrony in prematurely born infants studied post-extubation.

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Title: Work of breathing during HHHFNC and synchronised NIPPV following extubation
Authors: Elinor Charles
Katie A. Hunt
Gerrard F. Rafferty
Janet L. Peacock
Anne Greenough
Publication date: 01-01-2019
Publisher: Springer Berlin Heidelberg
Published in: European Journal of Pediatrics / Issue 1/2019
Print ISSN: 0340-6199
Electronic ISSN: 1432-1076
DOI: https://doi.org/10.1007/s00431-018-3254-3

At a glance: The STEP trials

Springer Medicine

Work of breathing during HHHFNC and synchronised NIPPV following extubation

Abstract

At a glance: The STEP trials

Springer Medicine

Abstract

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