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Published in: Sleep and Breathing 3/2021

01-09-2021 | Non-Invasive Ventilation | Sleep Breathing Physiology and Disorders • Original Article

Effects of nasal high flow on nocturnal hypercapnia, sleep, and sympathovagal balance in patients with neuromuscular disorders

Authors: Anna Christina Meyer, Jens Spiesshoefer, Nina Christina Siebers, Anna Heidbreder, Christian Thiedemann, Hartmut Schneider, Andrew T. Braun, Winfried Randerath, Peter Young, Michael Dreher, Matthias Boentert

Published in: Sleep and Breathing | Issue 3/2021

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Abstract

Purpose

In neuromuscular disorders (NMD), inspiratory muscle weakness may cause sleep-related hypoventilation requiring non-invasive ventilation (NIV). Alternatively, nasal high flow therapy (NHF) may ameliorate mild nocturnal hypercapnia (NH) through washout of anatomical dead space and generation of positive airway pressure. Ventilatory support by NIV or NHF might have favourable short-term effects on sympathovagal balance (SVB). This study comparatively investigated the effects of NHF and NIV on sleep-related breathing and SVB in NMD patients with evolving NH.

Methods

Transcutaneous CO2 (ptcCO2), peripheral oxygen saturation (SpO2), sleep outcomes and SVB (spectral analysis of heart rate, diastolic blood pressure variability) along with haemodynamic measures (cardiac index, total peripheral resistance index) were evaluated overnight in 17 patients. Polysomnographies (PSG) were randomly split into equal parts with no treatment, NIV and NHF at different flow rates (20 l/min vs. 50 l/min). In-depth analysis of SVB and haemodynamics was performed on 10-min segments of stable N2 sleep taken from each intervention.

Results

Compared with no treatment, NHF20 and NHF50 did not significantly change ptcCO2, SpO2 or the apnea hypopnea index (AHI). NHF50 was poorly tolerated. In contrast, NIV significantly improved both gas exchange and AHI without adversely affecting sleep. During daytime, NHF20 and NHF50 had neutral effects on ventilation and oxygenation whereas NIV improved ptcCO2 and SpO2. Effects of NIV and NHF on SVB and haemodynamics were neutral during both night and daytime.

Conclusions

NHF does not correct sleep-disordered breathing in NMD patients with NH. Both NHF and NIV exert no immediate effects on SVB.
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Metadata
Title
Effects of nasal high flow on nocturnal hypercapnia, sleep, and sympathovagal balance in patients with neuromuscular disorders
Authors
Anna Christina Meyer
Jens Spiesshoefer
Nina Christina Siebers
Anna Heidbreder
Christian Thiedemann
Hartmut Schneider
Andrew T. Braun
Winfried Randerath
Peter Young
Michael Dreher
Matthias Boentert
Publication date
01-09-2021
Publisher
Springer International Publishing
Published in
Sleep and Breathing / Issue 3/2021
Print ISSN: 1520-9512
Electronic ISSN: 1522-1709
DOI
https://doi.org/10.1007/s11325-020-02263-2

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