An acute exposure to intermittent negative airway pressure elicits respiratory long-term facilitation in awake humans.

Autor: Griffin HS; Lung Function & Sleep, Queen Elizabeth Hospital Birmingham, B15 2GW, United Kingdom., Al Humoud S; School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, B152TT, United Kingdom., Benson JG; School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, B152TT, United Kingdom., Cooper BG; Lung Function & Sleep, Queen Elizabeth Hospital Birmingham, B15 2GW, United Kingdom., Coomaraswamy K; The School of Dentistry, University of Birmingham, B5 7EG, United Kingdom., Balanos GM; School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, B152TT, United Kingdom. Electronic address: g.m.balanos@bham.ac.uk.
Jazyk: angličtina
Zdroj: Respiratory physiology & neurobiology [Respir Physiol Neurobiol] 2019 Sep; Vol. 267, pp. 20-26. Date of Electronic Publication: 2019 Jun 06.
DOI: 10.1016/j.resp.2019.05.016
Abstrakt: Background: A sustained elevation in respiratory drive following removal of the inducing stimulus is known as respiratory long-term facilitation (rLTF). We investigated whether an acute exposure to intermittent negative airway pressure (INAP) elicits rLTF in humans.
Method: 13 healthy males (20.9 ± 2.8 years) undertook two trials (INAP and Control). In the INAP trial participants were exposed to one hour of 30-second episodes of breathing against negative pressure (-10 cmH 2 O) interspersed by 60-second intervals of breathing at atmospheric pressure. In the Control trial participants breathed at atmospheric pressure for one hour. Ventilation following INAP (recovery phase) was compared to that during baseline.
Results: Ventilation increased from baseline to recovery in the INAP trial (14.9 ± 0.9 vs 19.1 ± 0.7 L/min, P = 0.002). This increase was significantly greater than the equivalent during the Control trial (P = 0.019). Data shown as mean ± SEM.
Conclusion: In this study INAP elicited rLTF in awake, healthy humans. Further research is required to investigate the responsible mechanisms.
(Crown Copyright © 2019. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: