1
|
Ribeiro LDJA, Bastos VHDV, Coertjens M. Breath-holding as model for the evaluation of EEG signal during respiratory distress. Eur J Appl Physiol 2024; 124:753-760. [PMID: 38105311 DOI: 10.1007/s00421-023-05379-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 11/14/2023] [Indexed: 12/19/2023]
Abstract
PURPOSE Research describes the existence of a relationship between cortical activity and the regulation of bulbar respiratory centers through the evaluation of the electroencephalographic (EEG) signal during respiratory challenges. For example, we found evidences of a reduction in the frequency of the EEG (alpha band) in both divers and non-divers during apnea tests. For instance, this reduction was more prominent in divers due to the greater physiological disturbance resulting from longer apnea time. However, little is known about EEG adaptations during tests of maximal apnea, a test that voluntarily stops breathing and induces dyspnea. RESULTS Through this mini-review, we verified that a protocol of successive apneas triggers a significant increase in the maximum apnea time and we hypothesized that successive maximal apnea test could be a powerful model for the study of cortical activity during respiratory distress. CONCLUSION Dyspnea is a multifactorial symptom and we believe that performing a successive maximal apnea protocol is possible to understand some factors that determine the sensation of dyspnea through the EEG signal, especially in people not trained in apnea.
Collapse
Affiliation(s)
- Lucas de Jesus Alves Ribeiro
- Physiotherapy Department, Universidade Federal do Delta do Parnaíba, Av. São Sebastião, CEP: 64.202-020, Parnaíba, PI, 2819, Brazil
- Brain Mapping and Functionality Laboratory, Universidade Federal do Delta do Parnaíba, Piauí, Brazil
| | - Victor Hugo do Vale Bastos
- Physiotherapy Department, Universidade Federal do Delta do Parnaíba, Av. São Sebastião, CEP: 64.202-020, Parnaíba, PI, 2819, Brazil
- Postgraduate Program in Biomedical Sciences, Universidade Federal do Delta do Parnaíba, Piauí, Brazil
- Brain Mapping and Functionality Laboratory, Universidade Federal do Delta do Parnaíba, Piauí, Brazil
| | - Marcelo Coertjens
- Physiotherapy Department, Universidade Federal do Delta do Parnaíba, Av. São Sebastião, CEP: 64.202-020, Parnaíba, PI, 2819, Brazil.
- Postgraduate Program in Biomedical Sciences, Universidade Federal do Delta do Parnaíba, Piauí, Brazil.
| |
Collapse
|
2
|
Collins PD, Giosa L, Camporota L, Barrett NA. State of the art: Monitoring of the respiratory system during veno-venous extracorporeal membrane oxygenation. Perfusion 2024; 39:7-30. [PMID: 38131204 DOI: 10.1177/02676591231210461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
Monitoring the patient receiving veno-venous extracorporeal membrane oxygenation (VV ECMO) is challenging due to the complex physiological interplay between native and membrane lung. Understanding these interactions is essential to understand the utility and limitations of different approaches to respiratory monitoring during ECMO. We present a summary of the underlying physiology of native and membrane lung gas exchange and describe different tools for titrating and monitoring gas exchange during ECMO. However, the most important role of VV ECMO in severe respiratory failure is as a means of avoiding further ergotrauma. Although optimal respiratory management during ECMO has not been defined, over the last decade there have been advances in multimodal respiratory assessment which have the potential to guide care. We describe a combination of imaging, ventilator-derived or invasive lung mechanic assessments as a means to individualise management during ECMO.
Collapse
Affiliation(s)
- Patrick Duncan Collins
- Department of Critical Care Medicine, Guy's and St Thomas' National Health Service Foundation Trust, London, UK
- Centre for Human and Applied Physiological Sciences, School of Basic and Medical Biosciences, King's College London, London, UK
| | - Lorenzo Giosa
- Department of Critical Care Medicine, Guy's and St Thomas' National Health Service Foundation Trust, London, UK
| | - Luigi Camporota
- Department of Critical Care Medicine, Guy's and St Thomas' National Health Service Foundation Trust, London, UK
- Centre for Human and Applied Physiological Sciences, School of Basic and Medical Biosciences, King's College London, London, UK
| | - Nicholas A Barrett
- Department of Critical Care Medicine, Guy's and St Thomas' National Health Service Foundation Trust, London, UK
- Centre for Human and Applied Physiological Sciences, School of Basic and Medical Biosciences, King's College London, London, UK
| |
Collapse
|
3
|
Schottelkotte KM, Crone SA. Forebrain control of breathing: Anatomy and potential functions. Front Neurol 2022; 13:1041887. [PMID: 36388186 PMCID: PMC9663927 DOI: 10.3389/fneur.2022.1041887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Accepted: 10/11/2022] [Indexed: 01/25/2023] Open
Abstract
The forebrain plays important roles in many critical functions, including the control of breathing. We propose that the forebrain is important for ensuring that breathing matches current and anticipated behavioral, emotional, and physiological needs. This review will summarize anatomical and functional evidence implicating forebrain regions in the control of breathing. These regions include the cerebral cortex, extended amygdala, hippocampus, hypothalamus, and thalamus. We will also point out areas where additional research is needed to better understand the specific roles of forebrain regions in the control of breathing.
Collapse
Affiliation(s)
- Karl M. Schottelkotte
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Steven A. Crone
- Division of Pediatric Neurosurgery, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States,Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States,Department of Neurosurgery, University of Cincinnati College of Medicine, Cincinnati, OH, United States,*Correspondence: Steven A. Crone
| |
Collapse
|
4
|
Hudson AL, Wattiez N, Navarro-Sune X, Chavez M, Similowski T. Combined head accelerometry and EEG improves the detection of respiratory-related cortical activity during inspiratory loading in healthy participants. Physiol Rep 2022; 10:e15383. [PMID: 35818313 PMCID: PMC9273870 DOI: 10.14814/phy2.15383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 06/15/2022] [Accepted: 06/21/2022] [Indexed: 12/01/2022] Open
Abstract
Mechanical ventilation is a highly utilized life‐saving tool, particularly in the current era. The use of EEG in a brain–ventilator interface (BVI) to detect respiratory discomfort (due to sub‐optimal ventilator settings) would improve treatment in mechanically ventilated patients. This concept has been realized via development of an EEG covariance‐based classifier that detects respiratory‐related cortical activity associated with respiratory discomfort. The aim of this study was to determine if head movement, detected by an accelerometer, can detect and/or improve the detection of respiratory‐related cortical activity compared to EEG alone. In 25 healthy participants, EEG and acceleration of the head were recorded during loaded and quiet breathing in the seated and lying postures. Detection of respiratory‐related cortical activity using an EEG covariance‐based classifier was improved by inclusion of data from an Accelerometer‐based classifier, i.e. classifier ‘Fusion’. In addition, ‘smoothed’ data over 50s, rather than one 5 s window of EEG/Accelerometer signals, improved detection. Waveform averages of EEG and head acceleration showed the incidence of pre‐inspiratory potentials did not differ between loaded and quiet breathing, but head movement was greater in loaded breathing. This study confirms that compared to event‐related analysis with >5 min of signal acquisition, an EEG‐based classifier is a clinically valuable tool with rapid processing, detection times, and accuracy. Data smoothing would introduce a small delay (<1 min) but improves detection results. As head acceleration improved detection compared to EEG alone, the number of EEG signals required to detect respiratory discomfort with future BVIs could be reduced if head acceleration is included.
Collapse
Affiliation(s)
- Anna L Hudson
- College of Medicine and Public Health, Flinders University, Adelaide, Australia.,Neuroscience Research Australia and, University of New South Wales, Sydney, Australia.,Sorbonne Université, INSERM UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France
| | - Nicolas Wattiez
- Sorbonne Université, INSERM UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France
| | - Xavier Navarro-Sune
- Sorbonne Université, INSERM UMR 1127, CNRS UMR 7225, Institut du Cerveau et de la Moelle Épinière, Paris, France.,myBrain Technologies, Paris, France
| | - Mario Chavez
- Sorbonne Université, INSERM UMR 1127, CNRS UMR 7225, Institut du Cerveau et de la Moelle Épinière, Paris, France
| | - Thomas Similowski
- Sorbonne Université, INSERM UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France.,AP-HP, Groupe Hospitalier APHP-Sorbonne Université, Hôpital Pitié-Salpêtrière, Département R3S, Paris, France
| |
Collapse
|
5
|
Gouveris H, Koirala N, Anwar AR, Ding H, Ludwig K, Huppertz T, Matthias C, Groppa S, Muthuraman M. Reduced Cross-Frequency Coupling and Daytime Sleepiness in Obstructive Sleep Apnea Patients. BIOLOGY 2022; 11:biology11050700. [PMID: 35625429 PMCID: PMC9138271 DOI: 10.3390/biology11050700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/10/2022] [Accepted: 04/25/2022] [Indexed: 11/30/2022]
Abstract
Obstructive sleep apnea (OSA) is associated with sleep-stage- and respiratory-event-specific sensorimotor cortico-muscular disconnection. The modulation of phase−amplitude cross-frequency coupling (PACFC) may influence information processing throughout the brain. We investigated whether sleep-stage-specific PACFC is impaired at the sensorimotor areas in OSA patients. C3 and C4 electrode EEG polysomnography recordings of 170 participants were evaluated. Different frequency band combinations were used to compute CFC modulation index (MI) to assess if MI differs between OSA and non-significant OSA patients in distinct sleep stages. We tested if the CFC-MI could predict daytime sleepiness in OSA. Theta−gamma CFC-MI at cortical sensorimotor areas was significantly reduced during all sleep stages; the delta−alpha CFC-MI was significantly reduced during REM and N1 while increasing during N2 in patients with respiratory disturbance index (RDI) > 15/h compared to those with RDI ≤ 15/h. A sleep stage classification using MI values was achieved in both patient groups. Theta−gamma MI during N2 and N3 could predict RDI and Epworth Sleepiness Scale, while delta−alpha MI during REM predicted RDI. This increase in disconnection at the cortical sensorimotor areas with increasing respiratory distress during sleep supports a cortical motor dysfunction in OSA patients. The MI provides an objective marker to quantify subjective sleepiness and respiratory distress in OSA.
Collapse
Affiliation(s)
- Haralampos Gouveris
- Sleep Medicine Center, Department of Otolaryngology, University Medical Center, Johannes Gutenberg University Mainz, 55131 Mainz, Germany; (K.L.); (T.H.); (C.M.)
- Correspondence: ; Tel.: +49-6131-177361
| | - Nabin Koirala
- Haskins Laboratories, Yale University, New Haven, CT 06511, USA;
| | - Abdul Rauf Anwar
- Department of Biomedical Engineering, University of Engineering and Technology (New Campus), Lahore 54890, Pakistan;
| | - Hao Ding
- Movement Disorders and Neurostimulation, Biomedical Statistics and Multimodal Signal Processing Unit, Department of Neurology, University Medical Center of Johannes Gutenberg University Mainz, 55131 Mainz, Germany; (H.D.); (S.G.); (M.M.)
| | - Katharina Ludwig
- Sleep Medicine Center, Department of Otolaryngology, University Medical Center, Johannes Gutenberg University Mainz, 55131 Mainz, Germany; (K.L.); (T.H.); (C.M.)
| | - Tilman Huppertz
- Sleep Medicine Center, Department of Otolaryngology, University Medical Center, Johannes Gutenberg University Mainz, 55131 Mainz, Germany; (K.L.); (T.H.); (C.M.)
| | - Christoph Matthias
- Sleep Medicine Center, Department of Otolaryngology, University Medical Center, Johannes Gutenberg University Mainz, 55131 Mainz, Germany; (K.L.); (T.H.); (C.M.)
| | - Sergiu Groppa
- Movement Disorders and Neurostimulation, Biomedical Statistics and Multimodal Signal Processing Unit, Department of Neurology, University Medical Center of Johannes Gutenberg University Mainz, 55131 Mainz, Germany; (H.D.); (S.G.); (M.M.)
| | - Muthuraman Muthuraman
- Movement Disorders and Neurostimulation, Biomedical Statistics and Multimodal Signal Processing Unit, Department of Neurology, University Medical Center of Johannes Gutenberg University Mainz, 55131 Mainz, Germany; (H.D.); (S.G.); (M.M.)
| |
Collapse
|
6
|
Nguyen DAT, Boswell-Ruys CL, McCaughey EJ, Gandevia SC, Hudson AL, Butler JE. Absence of inspiratory premotor potentials during quiet breathing in cervical spinal cord injury. J Appl Physiol (1985) 2020; 128:660-666. [PMID: 32078470 DOI: 10.1152/japplphysiol.00831.2019] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
A premotor potential, or Bereitschaftspotential (BP), is a low-amplitude negativity in the electroencephalographic activity (EEG) of the sensorimotor cortex. It begins ~1 s prior to the onset of inspiration in the averaged EEG. Although normally absent during quiet breathing in healthy, younger people, inspiration-related BPs are present in people with respiratory disease and healthy, older people, indicating a cortical contribution to quiet breathing. People with tetraplegia have weak respiratory muscles and increased neural drive during quiet breathing, indicated by increased inspiratory muscle activity. Therefore, we hypothesized that BPs would be present during quiet breathing in people with tetraplegia. EEG was recorded in 17 people with chronic tetraplegia (14M, 3 female; 22-51 yr; C3-C7, American Spinal Injury Association Impairment Scale A-D; >1 yr postinjury). They had reduced lung function and respiratory muscle weakness [FEV1: 54 ± 19% predicted, FVC: 59 ± 22% predicted and MIP: 56 ± 24% predicted (mean ± SD)]. Participants performed quiet breathing and voluntary self-paced sniffs (positive control condition). A minimum of 250 EEG epochs during quiet breathing and 60 epochs during sniffs, time-locked to the onset of inspiration, were averaged to determine the presence of BPs at Cz, FCz, C3, and C4. Fifteen participants (88%) had a BP for the sniffs. Of these 15 participants, only one (7%) had a BP in quiet breathing, a rate similar to that reported during quiet breathing in young able-bodied participants (12%). The findings suggest that, as in young able-bodied people, a cortical contribution to quiet breathing is absent in people with tetraplegia despite higher neural drive.NEW & NOTEWORTHY People with tetraplegia have weak respiratory muscles, increased neural drive during quiet breathing, and a high incidence of sleep-disordered breathing. Using electroencephalographic recordings, we show that inspiratory premotor potentials are absent in people with chronic tetraplegia during quiet breathing. This suggests that cortical activity is not present during resting ventilation in people with tetraplegia who are awake and breathing independently.
Collapse
Affiliation(s)
- David A T Nguyen
- Neuroscience Research Australia, New South Wales, Australia.,University of New South Wales, New South Wales, Australia
| | - Claire L Boswell-Ruys
- Neuroscience Research Australia, New South Wales, Australia.,University of New South Wales, New South Wales, Australia.,Prince of Wales Hospital, New South Wales, Australia
| | - Euan James McCaughey
- Neuroscience Research Australia, New South Wales, Australia.,University of New South Wales, New South Wales, Australia
| | - Simon C Gandevia
- Neuroscience Research Australia, New South Wales, Australia.,University of New South Wales, New South Wales, Australia.,Prince of Wales Hospital, New South Wales, Australia
| | - Anna L Hudson
- Neuroscience Research Australia, New South Wales, Australia.,University of New South Wales, New South Wales, Australia
| | - Jane E Butler
- Neuroscience Research Australia, New South Wales, Australia.,University of New South Wales, New South Wales, Australia.,Prince of Wales Hospital, New South Wales, Australia
| |
Collapse
|
7
|
Launois C, Nierat M, Attali V, Raux M, Arnulf I, Similowski T, Redolfi S. Postural preinspiratory cortical activity, genioglossus activity and fluid shift in awake obstructive sleep apnoea patients. Exp Physiol 2019; 105:370-378. [DOI: 10.1113/ep087804] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Accepted: 11/12/2019] [Indexed: 01/06/2023]
Affiliation(s)
- Claire Launois
- Sorbonne UniversitéINSERM, UMRS 1158 Neurophysiologie Respiratoire Expérimentale et Clinique Paris France
| | - Marie‐Cécile Nierat
- Sorbonne UniversitéINSERM, UMRS 1158 Neurophysiologie Respiratoire Expérimentale et Clinique Paris France
| | - Valérie Attali
- Sorbonne UniversitéINSERM, UMRS 1158 Neurophysiologie Respiratoire Expérimentale et Clinique Paris France
- AP‐HPGroupe Hospitalier Pitié‐Salpêtrière Charles FoixService de Pathologies du Sommeil Département R3S Paris France
| | - Mathieu Raux
- Sorbonne UniversitéINSERM, UMRS 1158 Neurophysiologie Respiratoire Expérimentale et Clinique Paris France
- AP‐HPGroupe Hospitalier Pitié‐Salpêtrière Charles FoixDépartement d'Anesthésie Réanimation Paris France
| | - Isabelle Arnulf
- AP‐HPGroupe Hospitalier Pitié‐Salpêtrière Charles FoixService de Pathologies du Sommeil Département R3S Paris France
| | - Thomas Similowski
- Sorbonne UniversitéINSERM, UMRS 1158 Neurophysiologie Respiratoire Expérimentale et Clinique Paris France
- AP‐HPGroupe Hospitalier Pitié‐Salpêtrière Charles FoixService de PneumologieMédecine Intensive et Réanimation Département R3S Paris France
| | - Stefania Redolfi
- Sorbonne UniversitéINSERM, UMRS 1158 Neurophysiologie Respiratoire Expérimentale et Clinique Paris France
- AP‐HPGroupe Hospitalier Pitié‐Salpêtrière Charles FoixService de Pathologies du Sommeil Département R3S Paris France
| |
Collapse
|
8
|
Launois C, Perger E, Attali V, Nierat M, Raux M, Arnulf I, Similowski T, Redolfi S. Postural respiratory‐related cortical activation and rostral fluid shift in awake healthy humans. Exp Physiol 2019; 104:887-895. [DOI: 10.1113/ep087468] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 02/27/2019] [Indexed: 12/29/2022]
Affiliation(s)
- Claire Launois
- Sorbonne UniversitéINSERM UMRS 1158 Neurophysiologie Respiratoire Expérimentale et Clinique Paris France
| | - Elisa Perger
- AP‐HPGroupe Hospitalier Pitié‐Salpêtrière Charles FoixService de Pathologies du SommeilDépartement R3S Paris France
| | - Valérie Attali
- Sorbonne UniversitéINSERM UMRS 1158 Neurophysiologie Respiratoire Expérimentale et Clinique Paris France
- AP‐HPGroupe Hospitalier Pitié‐Salpêtrière Charles FoixService de Pathologies du SommeilDépartement R3S Paris France
| | - Marie‐Cécile Nierat
- Sorbonne UniversitéINSERM UMRS 1158 Neurophysiologie Respiratoire Expérimentale et Clinique Paris France
| | - Mathieu Raux
- Sorbonne UniversitéINSERM UMRS 1158 Neurophysiologie Respiratoire Expérimentale et Clinique Paris France
- AP‐HPGroupe Hospitalier Pitié‐Salpêtrière Charles FoixDépartement d'Anesthésie Réanimation Paris France
| | - Isabelle Arnulf
- AP‐HPGroupe Hospitalier Pitié‐Salpêtrière Charles FoixService de Pathologies du SommeilDépartement R3S Paris France
| | - Thomas Similowski
- Sorbonne UniversitéINSERM UMRS 1158 Neurophysiologie Respiratoire Expérimentale et Clinique Paris France
- AP‐HPGroupe Hospitalier Pitié‐Salpêtrière Charles FoixService de PneumologieMédecine Intensive et RéanimationDépartement R3S Paris France
| | - Stefania Redolfi
- Sorbonne UniversitéINSERM UMRS 1158 Neurophysiologie Respiratoire Expérimentale et Clinique Paris France
- AP‐HPGroupe Hospitalier Pitié‐Salpêtrière Charles FoixService de Pathologies du SommeilDépartement R3S Paris France
| |
Collapse
|
9
|
Morélot‐Panzini C. Respiratory‐related cortical activity in patients with COPD and aged normal individuals: towards a different vision of dyspnoea? J Physiol 2018; 596:6137-6138. [DOI: 10.1113/jp276761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Capucine Morélot‐Panzini
- AP‐HPGroupe Hospitalier Pitié‐Salpêtrière Charles FoixService de PneumologieMédecine Intensive et Réanimation, (Département “R3S”) F‐75013 Paris France
- Sorbonne UniversitéINSERM UMRS1158 Neurophysiologie respiratoire expérimentale et clinique F‐75005 Paris France
| |
Collapse
|
10
|
Nierat MC, Raux M, Redolfi S, Gonzalez-Bermejo J, Biondi G, Straus C, Rivals I, Morélot-Panzini C, Similowski T. Neuroergonomic and psychometric evaluation of full-face crew oxygen masks respiratory tolerance: a proof-of-concept study. J ROY ARMY MED CORPS 2018; 165:317-324. [PMID: 30415218 DOI: 10.1136/jramc-2018-001028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 09/19/2018] [Accepted: 09/19/2018] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Preventing in-flight hypoxia in pilots is typically achieved by wearing oxygen masks. These masks must be as comfortable as possible to allow prolonged and repeated use. The consequences of mask-induced facial contact pressure have been extensively studied, but little is known about mask-induced breathing discomfort. Because breathlessness is a strong distractor and engages cerebral resources, it could negatively impact flying performances. METHODS Seventeen volunteers (age 20-32) rated respiratory discomfort while breathing with no mask and with two models of quick-donning full-face crew oxygen masks with regulators (mask A, mask B). Electroencephalographic recordings were performed to detect a putative respiratory-related cortical activation in response to inspiratory constraint (experiment 1, n=10). Oxygen consumption was measured using indirect calorimetry (experiment 2, n=10). RESULTS With mask B, mild respiratory discomfort was reported significantly more frequently than with no mask or mask A (experiment 1: median respiratory discomfort on visual analogue scale 0.9 cm (0.5-1.4), experiment 1; experiment 2: 2 cm (1.7-2.9)). Respiratory-related cortical activation was present in 1/10 subjects with no mask, 1/10 with mask A and 6/10 with mask B (significantly more frequently with mask B). Breathing pattern, sigh frequency and oxygen consumption were not different. CONCLUSIONS In a laboratory setting, breathing through high-end aeronautical full-face crew oxygen masks can induce mild breathing discomfort and activate respiratory-related cortical networks. Whether or not this can occur in real-life conditions and have operational consequences remains to be investigated. Meanwhile, respiratory psychometric and neuroergonomic approaches could be worth integrating to masks development and evaluation processes.
Collapse
Affiliation(s)
- Marie-Cécile Nierat
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France
| | - M Raux
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France.,Département d'Anesthésie-Réanimation, AP-HP, Groupe Hospitalier Pitié-Salpêtrière Charles Foix, Paris, France
| | - S Redolfi
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France.,Service des Pathologies du Sommeil, Département R3S, AP-HP, Groupe Hospitalier Pitié-Salpêtrière Charles Foix, Paris, France
| | - J Gonzalez-Bermejo
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France.,Service de Pneumologie, Médecine Intensive et Réanimation, Département R3S, AP-HP, Groupe Hospitalier Pitié-Salpêtrière Charles Foix, Paris, France
| | - G Biondi
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France
| | - C Straus
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France.,Service des Explorations de la Fonction Respiratoire, de l'Exercice et de la Dyspnée, Département R3S, AP-HP, Groupe Hospitalier Pitié-Salpêtrière Charles Foix, Paris, France
| | - I Rivals
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France.,Equipe de Statistique Appliquée, ESPCI Paris, PSL Research University, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France
| | - C Morélot-Panzini
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France.,Service de Pneumologie, Médecine Intensive et Réanimation, Département R3S, AP-HP, Groupe Hospitalier Pitié-Salpêtrière Charles Foix, Paris, France
| | - T Similowski
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France .,Service de Pneumologie, Médecine Intensive et Réanimation, Département R3S, AP-HP, Groupe Hospitalier Pitié-Salpêtrière Charles Foix, Paris, France
| |
Collapse
|