Treating chronic hypoventilation with automatic adjustable versus fixed EPAP Intelligent Volume-Assured Positive Airway Pressure Support (iVAPS): A randomized controlled trial

Nigel McArdle, Clare Rea, Stuart King, Kathleen J. Maddison, Dinesh Ramanan, Sahisha Ketheeswaran, Lisa Erikli, Vanessa Baker, Jeff Armitstead, Glenn Richards, Bhajan Singh, David Hillman, Peter Eastwood

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Objectives: New noninvasive ventilation (NIV) modes can automatically adjust pressure support settings to deliver effective ventilation in response to varying ventilation demands. It is recommended that fixed expiratory positive airway pressure (FixedEPAP) is determined by attended laboratory polysomnographic (PSG) titration. This study investigated whether automatically determined EPAP (AutoEPAP) was noninferior to FixedEPAP for the control of obstructive sleep apnea (OSA) during intelligent volume-assured pressure support (iVAPS) treatment of chronic hypoventilation. Methods: In this randomized, double-blind, crossover study, patients with chronic hypoventilation and OSA used iVAPS with AutoEPAP or FixedEPAP over two separate nights of attended PSG. PSG recordings were scored by an independent scorer using American Academy of Sleep Medicine 2012 criteria. Results: Twenty-five adults (14 male) with chronic hypoventilation secondary to obesity hypoventilation syndrome (n = 11), chronic obstructive pulmonary disease (n = 9), or neuromuscular disease (n = 5), all of whom were on established home NIV therapy, were included (age 57 ±7 years, NIV for ≥3 months, apnea-hypopnea index [AHI] >5/hour). AutoEPAP was noninferior to FixedEPAP for the primary outcome measure (median [interquartile range] AHI 2.70 [1.70- 6.05]/hour vs. 2.40 [0.25-5.95]/hour; p = .86). There were no significant between-mode differences in PSG sleep breathing and sleep quality, or self-reported sleep quality, device comfort, and patient preference. Mean EPAP with the Auto and Fixed modes was 10.8 ±2.0 and 11.8 ±3.9 cmH2O, respectively (p = .15). Conclusions: In patients with chronic hypoventilation using iVAPS, the AutoEPAP algorithm was noninferior to FixedEPAP over a single night's therapy.

Original languageEnglish
Article numberzsx136
Number of pages9
JournalSLEEP
Volume40
Issue number10
DOIs
Publication statusPublished - 1 Oct 2017
Externally publishedYes

Keywords

  • sleep apnea syndromes
  • hypoventilation
  • noninvasive ventilation
  • intermittent positive pressure ventilation
  • volume-assured pressure support

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