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Research ArticleOriginal Research

Association Between Pressure Support During Extubation Readiness Testing and Time to First Extubation in Children With Congenital Heart Disease

Andrew G Miller, Karan R Kumar, Jessica Brown, Dirk Mattin, Olivia Marshburn, Jeanette Muddiman, Veerajalandhar Allareddy and Alexandre T Rotta
Respiratory Care March 2023, 68 (3) 300-308; DOI: https://doi.org/10.4187/respcare.10251
Andrew G Miller
Duke University Medical Center, Durham, North Carolina.
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  • For correspondence: [email protected]
Karan R Kumar
Duke University Medical Center, Durham, North Carolina.
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Jessica Brown
Duke University Medical Center, Durham, North Carolina.
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Dirk Mattin
Duke University Medical Center, Durham, North Carolina.
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Olivia Marshburn
Duke University Medical Center, Durham, North Carolina.
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Jeanette Muddiman
Duke University Medical Center, Durham, North Carolina.
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Veerajalandhar Allareddy
Duke University Medical Center, Durham, North Carolina.
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Alexandre T Rotta
Duke University Medical Center, Durham, North Carolina.
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Abstract

BACKGROUND: Extubation readiness testing (ERT) is often performed in children with congenital heart disease prior to liberation from mechanical ventilation. The ideal ERT method in this population is unknown. We recently changed our ERT method from variable (10, 8, or 6 cm H2O, depending on endotracheal tube size) to fixed (5 cm H2O) pressure support (PS). Our study assessed the association between this change and time to first extubation and need for re-intubation.

METHODS: We studied 2 temporally distinct cohorts, one where ERT was conducted with variable PS and another using PS fixed at 5 cm H2O. Data were prospectively collected as part of a quality improvement project. The primary outcome was time to first extubation. Secondary outcomes were need for re-intubation and percentage of successful ERTs. We performed Poisson regression or logistic regression for the association between PS during ERT and time to first extubation or re-intubation, respectively.

RESULTS: We included 320 subjects, 186 in the variable PS group and 152 in fixed PS group. In unadjusted analysis, median time to first extubation was longer in the fixed PS group compared to the variable PS group (4.1 [2.0–7.1] d vs 3.1 [1.1–5.9] d, P = .02), and there was no difference in re-intubation rate (11% vs 8%, P = .34). Subjects in the fixed PS group were significantly more likely to be mechanically ventilated after cardiac arrest, have a Society of Thoracic Surgeons-European Association for Cardio-Thoracic Surgery (STAT) category of 4 or 5, be extubated on day shift, receive enteral feeds at extubation, have higher respiratory support at extubation, and higher dead-space-to-tidal-volume ratio. After controlling for these variables in multivariable regression, we found no association between the choice of PS and time to first extubation or re-intubation.

CONCLUSIONS: The use of a fixed PS of 5 cm H2O instead of variable PS during ERT was not associated with longer time to first extubation or extubation failure.

  • extubation readiness testing
  • spontaneous breathing trials
  • children
  • congenital heart disease
  • respiratory therapy
  • protocol
  • pressure support
  • mechanical ventilation

Footnotes

  • Correspondence: Andrew G Miller MSc RRT RRT-ACCS RRT-NPS FAARC. E-mail: Andrew.g.miller{at}duke.edu
  • See the Related Editorial on Page 440

  • Mr Miller is a section editor for Respiratory Care and discloses a relationship with Saxe Communications. Dr Rotta discloses relationships with Breas US, Vapotherm, Elsevier, and S2N Health. The remaining authors have disclosed no conflicts of interest.

  • Supplementary material related to this paper is available at http://www.rcjournal.com.

  • Copyright © 2023 by Daedalus Enterprises
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Respiratory Care: 68 (3)
Respiratory Care
Vol. 68, Issue 3
1 Mar 2023
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Association Between Pressure Support During Extubation Readiness Testing and Time to First Extubation in Children With Congenital Heart Disease
Andrew G Miller, Karan R Kumar, Jessica Brown, Dirk Mattin, Olivia Marshburn, Jeanette Muddiman, Veerajalandhar Allareddy, Alexandre T Rotta
Respiratory Care Mar 2023, 68 (3) 300-308; DOI: 10.4187/respcare.10251

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Association Between Pressure Support During Extubation Readiness Testing and Time to First Extubation in Children With Congenital Heart Disease
Andrew G Miller, Karan R Kumar, Jessica Brown, Dirk Mattin, Olivia Marshburn, Jeanette Muddiman, Veerajalandhar Allareddy, Alexandre T Rotta
Respiratory Care Mar 2023, 68 (3) 300-308; DOI: 10.4187/respcare.10251
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Keywords

  • extubation readiness testing
  • spontaneous breathing trials
  • Children
  • congenital heart disease
  • respiratory therapy
  • protocol
  • pressure support
  • mechanical ventilation

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