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Beydon N, Abou Taam R, Delclaux C, Du Boisbaudry C, Gauthier R, Ioan I, Le Bourgeois M, Giroux-Metges MA, Matecki S. [Pulmonary function test: The testing of children]. Rev Mal Respir 2024; 41:488-497. [PMID: 39003097 DOI: 10.1016/j.rmr.2024.06.005] [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: 03/05/2024] [Accepted: 05/30/2024] [Indexed: 07/15/2024]
Abstract
In paediatrics, the pulmonary function test (PFT) is most often performed to support the diagnosis or in follow-up of asthma patients. Whatever the pathology responsible for respiratory symptoms and/or functional impairment, repeated PFTs make it possible to establish a prognosis (pulmonary function trajectories…) and to orient preventive interventions. PFT can be performed routinely from the age of three years, provided that the following requirements are met: suitable techniques and equipment, staff trained to apply the techniques and to receive young children, reference values for each technique indicating the limits of normal values and of between-test significant variation. From the age of three, children can be subjected to tidal breathing measurement of: resistance of the respiratory system (oscillometry, Rrs; airflow interruption, Rint) or of airways specific resistance (sRaw) and functional residual capacity (by applying a dilution technique). With maturity, the child will become capable of mobilizing his or her slow vital capacity to measure total lung capacity (TLC), once again by applying a dilution technique, then later by breathing against a closed shutter (plethysmography TLC and Raw). Finally, the child will be able to carry out forced expiration (forced spirometry) along with all of the other PFTs. It is important to take into account the paediatric adaptations specified in the international recommendations regarding the performance, reproducibility and quality of PFTs targeting this population.
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Affiliation(s)
- N Beydon
- Inserm U938, unité fonctionnelle d'explorations fonctionnelles respiratoire et somnologie, centre de recherche Saint-Antoine, hôpital Armand-Trousseau, Sorbonne université, AP-HP, 75012 Paris, France.
| | - R Abou Taam
- Laboratoire d'explorations fonctionnelles respiratoires pédiatriques, service de pneumologie et allergologie pédiatriques, hôpital Necker-Enfants-Malades, université de Paris, AP-HP, Paris, France
| | - C Delclaux
- Inserm NeuroDiderot, service de physiologie et centre du sommeil, hôpital Robert-Debré, université Paris-Cité, AP-HP, 75019 Paris, France
| | - C Du Boisbaudry
- EA 4324 Orphy, service d'explorations fonctionnelles, centre hospitalier de Brest, 29200 Brest, France
| | - R Gauthier
- Service de cardiologie et pneumo-allergologie pédiatriques, unité d'explorations fonctionnelles respiratoires pédiatriques, CHU d'Amiens-Picardie, Amiens, France
| | - I Ioan
- Service de physiologie, unité d'explorations fonctionnelles pédiatriques, hôpital d'Enfants, CHRU de Nancy, Nancy, France
| | - M Le Bourgeois
- Laboratoire d'explorations fonctionnelles respiratoires pédiatriques, service de pneumologie et allergologie pédiatriques, hôpital Necker-Enfants-Malades, université de Paris, AP-HP, Paris, France
| | - M-A Giroux-Metges
- EA 4324 Orphy, service d'explorations fonctionnelles, centre hospitalier de Brest, 29200 Brest, France
| | - S Matecki
- Inserm U1046, Physiology and experimental Medicine: Heart-Muscle UMR CNRS 9214, Unité d'Exploration Fonctionnelle Pédiatrique, Université de Montpellier, CHU de Montpellier, Montpellier, France
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Kaminsky DA, Anekonda VT, Verbanck S, Graham BL. Using the phase III slope of exhaled methane during a single breath D LCO test to assess ventilation heterogeneity. Respir Med 2024; 231:107725. [PMID: 38950682 DOI: 10.1016/j.rmed.2024.107725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 06/18/2024] [Accepted: 06/28/2024] [Indexed: 07/03/2024]
Abstract
BACKGROUND The Phase III slope from a single breath nitrogen washout test provides information about ventilation heterogeneity (VH) in the lungs. PURPOSE To determine if the Phase III slope from the exhaled tracer gas concentration during a standard, single breath DLCO test using rapid gas analysis provides similar information about VH. BASIC PROCEDURES Retrospective analysis of clinical pulmonary function laboratory data including spirometry, lung volumes, and DLCO. The normalized Phase III slope from the exhaled CH4 concentration (SnCH4) was compared among different patterns of physiologic abnormality and with VA/TLC as an indicator of VH. MAIN FINDINGS SnCH4 was the steepest in the group with "Obstruction and Low DLCO", with significant differences between this group and the "Normal", "Obstruction with Normal DLCO", "Mixed Obstruction and Restriction" and "Isolated Low DLCO" groups. SnCH4 was steeper in current and former smokers compared to non-smokers. Among the entire study sample, SnCH4 correlated with VA/TLC (Spearman rho = -0.56, p < 0.01) and remained a significant determinant of VA/TLC by regression modeling. PRINCIPAL CONCLUSIONS The SnCH4 derived from a standard, single breath DLCO test using rapid gas analysis varied among distinct patterns of physiologic abnormalities and was associated with VA/TLC as a measure of VH.
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Affiliation(s)
- David A Kaminsky
- Pulmonary and Critical Care, University of Vermont Larner College of Medicine, Given D213, 89 Beaumont Avenue, Burlington, VT, 05405, USA.
| | - Vishwanath T Anekonda
- Department of General Medicine, Beth Israel Deaconess Medical Center, 330 Brookline Avenue, Boston, MA, 02215, USA.
| | - Sylvia Verbanck
- Respiratory Division, Vrije Universiteit Brussel, Brussels, Belgium.
| | - Brian L Graham
- Emeritus Division of Respirology, Critical Care and Sleep Medicine University of Saskatchewan Saskatoon, SK, Canada.
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3
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Bayat S. [Respiratory oscillometry: Theoretical foundations and clinical applications]. Rev Mal Respir 2024:S0761-8425(24)00249-3. [PMID: 39174416 DOI: 10.1016/j.rmr.2024.08.002] [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: 03/29/2024] [Accepted: 07/22/2024] [Indexed: 08/24/2024]
Abstract
Oscillometry measures the mechanical properties of the respiratory system. As they are carried out during spontaneous breathing, oscillometry measurements do not require forced breathing maneuvers or the patient's active cooperation. The technique is complementary to conventional pulmonary function testing methods for the investigation of respiratory function, diagnosis and monitoring of respiratory diseases, and assessment of response to treatment. The present review aims to describe the theoretical foundations and practical methodology of oscillometry. It describes the gaps in scientific evidence regarding its clinical utility, and provides examples of current research and clinical applications.
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Affiliation(s)
- S Bayat
- Unité d'explorations fonctionnelles cardiorespiratoires, service de pneumologie et physiologie, CHU Grenoble Alpes, Grenoble, France; STROBE, Inserm UA07, université Grenoble Alpes, Grenoble, France.
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Sugawara H, Saito A, Yokoyama S, Chiba H. Therapeutic effect of long-acting muscarinic antagonist for treating uncontrolled asthma assessed using impulse oscillometry. Respir Res 2024; 25:300. [PMID: 39113044 PMCID: PMC11308707 DOI: 10.1186/s12931-024-02921-z] [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: 03/25/2024] [Accepted: 07/20/2024] [Indexed: 08/10/2024] Open
Abstract
BACKGROUND In recent years, the incorporation of LAMAs into asthma therapy has been expected to enhance symptom control. However, a significant number of patients with asthma continue to experience poorly managed symptoms. There have been limited investigations on LAMA-induced airway alterations in asthma treatment employing IOS. In this study, we administered a LAMA to patients with poorly controlled asthma, evaluated clinical responses and respiratory function, and investigated airway changes facilitated by LAMA treatments using the IOS. METHODS Of a total of 1282 consecutive patients with asthma, 118 exhibited uncontrolled symptoms. Among them, 42 switched their treatment to high-dose fluticasone furoate/umeclidinium/vilanterol (FF/UMEC/VI) (ICS/LABA/LAMA). The patients were then assessed using AHQ-33 or LCQ and ACT. Spirometry parameters (such as FEV1 or MMEF) and IOS parameters (such as R20 or AX) were measured and compared before and after exacerbations and the addition of LAMA. RESULTS Of the 42 patients, 17 who switched to FF/UMEC/VI caused by dyspnea exhibited decreased pulmonary function between period 1 and baseline, followed by an increase in pulmonary function between baseline and period 2. Significant differences were observed in IOS parameters such as R20, R5-R20, Fres, or AX between period 1 and baseline as well as between baseline and period 2. Among the patients who switched to inhaler due to cough, 25 were classified as responders (n = 17) and nonresponders (n = 8) based on treatment outcomes. Among nonresponders, there were no significant differences in spirometry parameters such as FEV1 or PEF and IOS parameters such as R20 or AX between period 1 and baseline. However, among responders, significant differences were observed in all IOS parameters, though not in most spirometry parameters, between period 1 and baseline. Furthermore, significant differences were noted between baseline and period 2 in terms of FEV1, %MMEF, %PEF, and all IOS parameters. CONCLUSION ICS/LABA/LAMA demonstrates superiority over ICS/LABA in improving symptoms and lung function, which is primarily attributed to the addition of LAMA. Additionally, IOS revealed the effectiveness of LAMA across all airway segments, particularly in the periphery. Hence, LAMA can be effective against various asthma phenotypes characterized by airway inflammation, even in real-world cases.
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Affiliation(s)
- Hiroyuki Sugawara
- Department of Respiratory Medicine and Allergology, Sapporo Medical University School of Medicine, S1W16 Chuoku Sapporo, Sapporo, Hokkaido, 060-8543, Japan
- Sugawara Internal Medicine and Respiratory Clinic, Tomakomai, 053-0821, Japan
| | - Atsushi Saito
- Department of Respiratory Medicine and Allergology, Sapporo Medical University School of Medicine, S1W16 Chuoku Sapporo, Sapporo, Hokkaido, 060-8543, Japan.
| | - Saori Yokoyama
- Department of Respiratory Medicine and Allergology, Sapporo Medical University School of Medicine, S1W16 Chuoku Sapporo, Sapporo, Hokkaido, 060-8543, Japan
- Sugawara Internal Medicine and Respiratory Clinic, Tomakomai, 053-0821, Japan
| | - Hirofumi Chiba
- Department of Respiratory Medicine and Allergology, Sapporo Medical University School of Medicine, S1W16 Chuoku Sapporo, Sapporo, Hokkaido, 060-8543, Japan
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Park D, Ha EK, Jung H, Kim JH, Shin J, Kim MA, Shin YH, Jee HM, Han MY. Associations of personal urinary volatile organic compounds and lung function in children. J Asthma 2024; 61:801-807. [PMID: 38198535 DOI: 10.1080/02770903.2024.2303770] [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: 09/19/2023] [Accepted: 01/07/2024] [Indexed: 01/12/2024]
Abstract
BACKGROUND We investigated the correlation between urine VOC metabolites and airway function in children exposed to anthropogenic volatile organic compounds (VOCs), notable pollutants impacting respiratory health. METHODS Out of 157 respondents, 141 completed skin prick tests, spirometry, IOS, and provided urine samples following the International Study of Asthma and Allergies in Childhood (ISAAC)-related questions. Allergic sensitization was assessed through skin prick tests, and airway functions were evaluated using spirometry and impulse oscillometry (IOS). Forced expiratory volume in 1 s (FEV1), forced vital capacity (FVC) was recorded and FEV1/FVC ratio was calculated. Airway mechanics parameters including respiratory resistance at 5 Hz (Rrs5) mean respiratory resistance between 5 Hz and 20 Hz (Rrs5-20), were also recorded. Urine concentrations of metabolites of benzene, ethylbenzene, toluene, xylene, styrene, formaldehyde, carbon-disulfide were analyzed by gas chromatography/tandem mass spectroscopy. RESULTS The median age at study participation was 7.1 (SD 0.3) years. Muconic acid (benzene metabolites) and o-methyl-hippuric acid (xylene metabolites) above medians were associated with a significant increase in Rrs5 (muconic acid: aβ = 0.150, p = .002; o-methyl-hippuric acid: aβ = 0.143, p = .023) and a decrease in FEV1/FVC (o-methyl-hippuric acid: aβ = 0.054, p = .028) compared to those below median. No associations were observed for Rrs5-20 and FEV1 between the groups categorized as above and below the median (all parameter p values > .05). CONCLUSIONS Elevated levels of benzene and xylene metabolites were associated with a significant increase in Rrs5 and a decrease in FEV1/FVC, related to increased resistance and restrictive lung conditions compared to individuals with concentrations below the median.
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Affiliation(s)
- Dawon Park
- Bundang CHA Medical Center, CHA University School of Medicine, Seongnam, Korea
| | - Eun Kyo Ha
- Kangnam Sacred Heart Hospital, Hallym University Medical Center, Seoul, Korea
| | - Haeri Jung
- Bundang CHA Medical Center, CHA University School of Medicine, Seongnam, Korea
| | - Ju Hee Kim
- Kyung Hee University Medical Center, Kyung Hee University School of Medicine, Seoul, Korea
| | - Jeewon Shin
- Bundang CHA Medical Center, CHA University School of Medicine, Seongnam, Korea
| | - Mi Ae Kim
- Bundang CHA Medical Center, CHA University School of Medicine, Seongnam, Korea
| | - Youn Ho Shin
- Yeouido St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Hye Mi Jee
- Bundang CHA Medical Center, CHA University School of Medicine, Seongnam, Korea
| | - Man Yong Han
- Bundang CHA Medical Center, CHA University School of Medicine, Seongnam, Korea
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Lee KG, Roca O, Casey JD, Semler MW, Roman-Sarita G, Yarnell CJ, Goligher EC. When to intubate in acute hypoxaemic respiratory failure? Options and opportunities for evidence-informed decision making in the intensive care unit. THE LANCET. RESPIRATORY MEDICINE 2024; 12:642-654. [PMID: 38801827 DOI: 10.1016/s2213-2600(24)00118-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 03/08/2024] [Accepted: 04/05/2024] [Indexed: 05/29/2024]
Abstract
The optimal timing of intubation in acute hypoxaemic respiratory failure is uncertain and became a point of controversy during the COVID-19 pandemic. Invasive mechanical ventilation is a potentially life-saving intervention but carries substantial risks, including injury to the lungs and diaphragm, pneumonia, intensive care unit-acquired muscle weakness, and haemodynamic impairment. In deciding when to intubate, clinicians must balance premature exposure to the risks of ventilation with the potential harms of unassisted breathing, including disease progression and worsening multiorgan failure. Currently, the optimal timing of intubation is unclear. In this Personal View, we examine a range of parameters that could serve as triggers to initiate invasive mechanical ventilation. The utility of a parameter (eg, the ratio of arterial oxygen tension to fraction of inspired oxygen) to predict the likelihood of a patient undergoing intubation does not necessarily mean that basing the timing of intubation on that parameter will improve therapeutic outcomes. We examine options for clinical investigation to make progress on establishing the optimal timing of intubation.
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Affiliation(s)
- Kevin G Lee
- Department of Physiology, Toronto, ON, Canada; Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
| | - Oriol Roca
- Servei de Medicina Intensiva, Parc Taulí Hospital Universitari, Institut de Recerca Parc Taulí-I3PT, Sabadell, Spain; Departament de Medicina, Universitat Autònoma de Barcelona, Bellaterra, Spain; Ciber Enfermedades Respiratorias, Instituto de Salud Carlos III, Madrid, Spain
| | - Jonathan D Casey
- Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Matthew W Semler
- Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | | | - Christopher J Yarnell
- Interdepartmental Division of Critical Care Medicine University of Toronto, Toronto, ON, Canada; Department of Medicine, Division of Respirology, University Health Network, Toronto, ON, Canada; Institute of Health Policy, Management, and Evaluation at the University of Toronto, Toronto, ON, Canada; Scarborough Health Network, Department of Critical Care Medicine, Toronto, ON, Canada; Scarborough Health Network Research Institute, Toronto, ON, Canada.
| | - Ewan C Goligher
- Department of Physiology, Toronto, ON, Canada; Interdepartmental Division of Critical Care Medicine University of Toronto, Toronto, ON, Canada; Department of Medicine, Division of Respirology, University Health Network, Toronto, ON, Canada; Toronto General Hospital Research Institute, Toronto, ON, Canada
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7
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Santos CE, da Fonseca Reis LF, da Silva SF, Fonseca IMPP, de Oliveira Pereira W, Pessoa LF, Villela PB, Lopes AJ. Dynamic hyperinflation on exercise and its relationship with lung mechanics at rest in adults with central obesity. Respir Physiol Neurobiol 2024; 326:104270. [PMID: 38688433 DOI: 10.1016/j.resp.2024.104270] [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: 12/26/2023] [Revised: 04/09/2024] [Accepted: 04/26/2024] [Indexed: 05/02/2024]
Abstract
This study aimed to evaluate the presence of dynamic hyperinflation (DH) during the Glittre-ADL test (TGlittre) coupled to the dynamic ventilation measurements in people with central obesity (pwCO) and to correlate it with lung mechanics at rest. Sixty-four pwCO underwent TGlittre and the following resting lung function tests: spirometry and impulse oscillometry system (IOS). On TGlittre, 22 participants presented DH at the end of the test (DH group), while 42 did not present DH (NDH group). Body mass index (BMI), waist circumference (WC), and hip circumference (HC) were higher in the DH group than in the NDH group. IOS abnormalities were more common in the DH group compared to the NDH group. TGlittre time significantly correlated with BMI, WC, waist-to-hip ratio (WHR), and neck circumference (NC). Delta inspiratory capacity correlated significantly with WC, HC, NC, and resonance frequency measured by IOS. Thus, pwCO perform worse on TGlittre, and DH is frequent in those with higher anthropometric indices and worse lung mechanics.
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Affiliation(s)
- Carlos Eduardo Santos
- Rehabilitation Sciences Postgraduate Programme, Centro Universitário Augusto Motta (UNISUAM), Rio de Janeiro, Brazil
| | - Luis Felipe da Fonseca Reis
- Rehabilitation Sciences Postgraduate Programme, Centro Universitário Augusto Motta (UNISUAM), Rio de Janeiro, Brazil
| | - Sidney Fernandes da Silva
- Rehabilitation Sciences Postgraduate Programme, Centro Universitário Augusto Motta (UNISUAM), Rio de Janeiro, Brazil
| | | | | | - Laura Franco Pessoa
- Faculty of Physiotherapy, Centro Universitário Augusto Motta (UNISUAM), Rio de Janeiro, Brazil
| | - Paolo Blanco Villela
- Postgraduate Programme in Cardiology, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Agnaldo José Lopes
- Rehabilitation Sciences Postgraduate Programme, Centro Universitário Augusto Motta (UNISUAM), Rio de Janeiro, Brazil; Postgraduate Programme in Medical Sciences, School of Medical Sciences, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, Brazil.
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8
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Choi JS, Kwak SH, Kim MC, Seol CH, Heo SJ, Kim SR, Lee EH. Usefulness of Impulse Oscillometry in Predicting the Severity of Bronchiectasis. Tuberc Respir Dis (Seoul) 2024; 87:368-377. [PMID: 38783483 PMCID: PMC11222088 DOI: 10.4046/trd.2023.0160] [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: 10/18/2023] [Revised: 02/17/2024] [Accepted: 04/19/2024] [Indexed: 05/25/2024] Open
Abstract
BACKGROUND Bronchiectasis is a chronic respiratory disease that leads to airway inflammation, destruction, and airflow limitation, which reflects its severity. Impulse oscillometry (IOS) is a non-invasive method that uses sound waves to estimate lung function and airway resistance. The aim of this study was to assess the usefulness of IOS in predicting the severity of bronchiectasis. METHODS We retrospectively reviewed the IOS parameters and clinical characteristics in 145 patients diagnosed with bronchiectasis between March 2020 and May 2021. Disease severity was evaluated using the FACED score, and patients were divided into mild and moderate/severe groups. RESULTS Forty-four patients (30.3%) were in the moderate/severe group, and 101 (69.7%) were in the mild group. Patients with moderate/severe bronchiectasis had a higher airway resistance at 5 Hz (R5), a higher difference between the resistance at 5 and 20 Hz (R5-R20), a higher resonant frequency (Fres), and a higher area of reactance (AX) than patients with mild bronchiectasis. R5 ≥0.43, resistance at 20 Hz (R20) ≥0.234, R5-R20 ≥28.3, AX ≥1.02, reactance at 5 Hz (X5) ≤-0.238, and Fres ≥20.88 revealed significant univariable relationships with bronchiectasis severity (p<0.05). Among these, only X5 ≤-0.238 exhibited a significant multivariable relationship with bronchiectasis severity (p=0.039). The receiver operating characteristic curve for predicting moderate- to-severe bronchiectasis of FACED score based on IOS parameters exhibited an area under the curve of 0.809. CONCLUSION The IOS assessed by the disease severity of FACED score can effectively reflect airway resistance and elasticity in bronchiectasis patients and serve as valuable tools for predicting bronchiectasis severity.
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Affiliation(s)
- Ji Soo Choi
- Division of Pulmonology, Allergy and Critical Care Medicine, Department of Internal Medicine, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Republic of Korea
| | - Se Hyun Kwak
- Division of Pulmonology, Allergy and Critical Care Medicine, Department of Internal Medicine, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Republic of Korea
| | - Min Chul Kim
- Division of Pulmonology, Allergy and Critical Care Medicine, Department of Internal Medicine, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Republic of Korea
| | - Chang Hwan Seol
- Division of Pulmonology, Allergy and Critical Care Medicine, Department of Internal Medicine, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Republic of Korea
| | - Seok-Jae Heo
- Division of Biostatistics, Department of Biomedical Systems Informatics, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Sung Ryeol Kim
- Division of Pulmonology, Allergy and Critical Care Medicine, Department of Internal Medicine, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Republic of Korea
| | - Eun Hye Lee
- Division of Pulmonology, Allergy and Critical Care Medicine, Department of Internal Medicine, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Republic of Korea
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9
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Perez-Bogerd S, Van Muylem A, Zengin S, El Khloufi Y, Maufroy E, Faoro V, Malinovschi A, Michils A. LAMA improves tissue oxygenation more than LABA in patients with COPD. J Appl Physiol (1985) 2024; 137:154-165. [PMID: 38722752 DOI: 10.1152/japplphysiol.00467.2023] [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: 07/10/2023] [Revised: 04/11/2024] [Accepted: 05/01/2024] [Indexed: 07/13/2024] Open
Abstract
The effect of bronchodilators is mainly assessed with forced expiratory volume in 1 s (FEV1) in chronic obstructive pulmonary disease (COPD). Their impact on oxygenation and lung periphery is less known. Our objective was to compare the action of long-acting β2-agonists (LABA-olodaterol) and muscarinic antagonists (LAMA-tiotropium) on tissue oxygenation in COPD, considering their impact on proximal and peripheral ventilation as well as lung perfusion. FEV1, Helium slope (SHe) from a single-breath washout test (SHe decreases reflecting a peripheral ventilation improvement), frequency dependence of resistance (R5-R19), area under reactance (AX), lung capillary blood volume (Vc) from double diffusion (DLNO/DLCO), and transcutaneous oxygenation (TcO2) were measured before and 2 h post-LABA (day 1) and LAMA (day 3) in 30 patients with COPD (FEV1 54 ± 18% pred; GOLD A 31%/B 48%/E 21%) after 5-7 days of washout, respectively. We found that TcO2 increased more (P = 0.03) after LAMA (11 ± 12% from baseline, P < 001) compared with LABA (4 ± 11%, P = 0.06) despite a lower FEV1 increase (P = 0.03) and similar SHe (P = 0.98), AX (P = 0.63), and R5-R19 decreases (P = 0.37). TcO2 and SHe changes were negatively correlated (r = -0.47, P = 0.01) after LABA, not after LAMA (r = 0.10, P = 0.65). DLNO/DLCO decreased and Vc increased after LAMA (P = 0.04; P = 0.01, respectively) but not after LABA (P = 0.53; P = 0.24). In conclusion, LAMA significantly improved tissue oxygenation in patients with COPD, while only a trend was observed with LABA. The mechanisms involved may differ between both drugs: LABA increased peripheral ventilation, whereas LAMA increased lung capillary blood volume. Should oxygenation differences persist over time, LAMA could arguably become the first therapeutic choice in COPD.NEW & NOTEWORTHY Long-acting muscarinic antagonists (LAMAs) significantly improved tissue oxygenation in patients with COPD, while only a trend was observed with β2-agonists (LABAs). The mechanisms involved may differ between drugs: increased peripheral ventilation for LABA and likely lung capillary blood volume for LAMA. This could argue for LAMA as the first therapeutic choice in COPD.
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Affiliation(s)
- Silvia Perez-Bogerd
- Chest Department, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Alain Van Muylem
- Chest Department, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Selim Zengin
- Chest Department, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Yasmina El Khloufi
- Chest Department, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Emilie Maufroy
- Cardiopulmonary Exercise Laboratory, Faculty of Motorskill Science, Université Libre de Bruxelles, Brussels, Belgium
| | - Vitalie Faoro
- Cardiopulmonary Exercise Laboratory, Faculty of Motorskill Science, Université Libre de Bruxelles, Brussels, Belgium
| | - Andrei Malinovschi
- Department of Medical Sciences: Clinical Physiology, Uppsala University, Uppsala, Sweden
| | - Alain Michils
- Chest Department, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
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10
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Patel S, Sylvester KP, Wu Z, Rhamie S, Dickel P, Maher TM, Molyneaux PL, Calverley PM, Man WDC. A comparison of respiratory oscillometry and spirometry in idiopathic pulmonary fibrosis: performance time, symptom burden and test-retest reliability. ERJ Open Res 2024; 10:00227-2024. [PMID: 39104963 PMCID: PMC11299002 DOI: 10.1183/23120541.00227-2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Accepted: 03/21/2024] [Indexed: 08/07/2024] Open
Abstract
Study question In large multinational patient surveys, spirometry (which requires repeated, reproducible maximal efforts) can be associated with cough, breathlessness and tiredness, particularly in those with idiopathic pulmonary fibrosis (IPF). Oscillometry is an effort-independent test of airways resistance and reactance. We hypothesised that oscillometry would take less time to perform and would be associated with reduced symptom burden than spirometry. Patients and methods Spirometry and oscillometry were performed in 66 participants with IPF and repeated 2 weeks later. We compared time taken to perform tests, symptom burden and test-retest reliability with Bland-Altman plots and intraclass correlation coefficients (ICCs). Results Oscillometry took significantly less time to perform than spirometry (mean -4.5 (99% CI -6.0 to -3.0) min) and was associated with lower symptom burden scores for cough (-1.3, 99% CI -1.7 to -0.8), breathlessness (-1.0, 99% CI -1.4 to -0.5), and tiredness (-0.5, 99% CI -0.9 to -0.2). On Bland-Altman analysis, all measures showed good agreement, with narrow limits of agreement and the mean bias lying close to 0 in all cases. The ICCs for forced expiratory volume in 1 s and forced vital capacity were 0.94 and 0.89, respectively, and ranged between 0.70 and 0.90 for oscillometry measures. Conclusion Oscillometry is quicker to perform and provokes less symptoms than spirometry in patients with IPF.
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Affiliation(s)
- Suhani Patel
- Harefield Respiratory Research Group, Harefield Hospital, Guy's and St Thomas’ NHS Foundation Trust, London, UK
- National Heart and Lung Institute, Imperial College, London, UK
| | - Karl P. Sylvester
- Respiratory Physiology, Papworth Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Zhe Wu
- National Heart and Lung Institute, Imperial College, London, UK
- Interstitial Lung Disease Unit, Royal Brompton Hospital, Guy's and St Thomas’ NHS Foundation Trust, London, UK
| | - Serena Rhamie
- Lung Function Departments, Royal Brompton and Harefield Hospitals, Guy's and St Thomas’ NHS Foundation Trust, London, UK
| | - Peter Dickel
- Lung Function Departments, Royal Brompton and Harefield Hospitals, Guy's and St Thomas’ NHS Foundation Trust, London, UK
| | - Toby M. Maher
- National Heart and Lung Institute, Imperial College, London, UK
- Keck Medicine of USC, Los Angeles, CA, USA
| | - Philip L. Molyneaux
- National Heart and Lung Institute, Imperial College, London, UK
- Interstitial Lung Disease Unit, Royal Brompton Hospital, Guy's and St Thomas’ NHS Foundation Trust, London, UK
| | - Peter M.A. Calverley
- Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, UK
| | - William D-C. Man
- Harefield Respiratory Research Group, Harefield Hospital, Guy's and St Thomas’ NHS Foundation Trust, London, UK
- National Heart and Lung Institute, Imperial College, London, UK
- Faculty of Life Science and Medicine, King's College London, London, UK
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11
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Nasr A, Papapostolou G, Jarenbäck L, Romberg K, Tunsäter A, Ankerst J, Bjermer L, Tufvesson E. Expiratory and inspiratory resistance and reactance from respiratory oscillometry defining expiratory flow limitation in obstructive lung diseases. Clin Physiol Funct Imaging 2024. [PMID: 38873744 DOI: 10.1111/cpf.12895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 05/19/2024] [Accepted: 06/05/2024] [Indexed: 06/15/2024]
Abstract
BACKGROUND Expiratory flow limitation (EFL) during tidal breathing and lung hyperinflation have been identified as major decisive factors for disease status, prognosis and response to therapy in obstructive lung diseases. AIM To investigate the delta values between expiratory and inspiratory resistance and reactance, measured using respiratory oscillometry and its correlation with air trapping and symptoms in subjects with obstructive lung diseases. METHODS Four hundred and seventy-one subjects (96 with chronic obstructive pulmonary disease [COPD], 311 with asthma, 30 healthy smokers and 34 healthy subjects) were included. Spirometry, body plethysmography and respiratory oscillometry measurements were performed and the differences between the expiratory and inspiratory respiratory oscillometry values (as delta values) were calculated. Questionnaires regarding symptoms and quality of life were administered. RESULTS Patients with COPD and healthy smokers had an increased delta resistance at 5 Hz (R5) compared with patients with asthma (p < 0.0001 and p = 0.037, respectively) and healthy subjects (p = 0.0004 and p = 0.012, respectively). Patients with COPD also had higher values of ΔR5-R19 than healthy subjects (p = 0.0001) and patients with asthma (p < 0.0001). Delta reactance at 5 Hz (X5) was significantly more impaired in COPD patients than in asthma and healthy subjects (p < 0.0001 for all). There was a correlation between the ratio of residual volume and total lung capacity and ΔR5 (p = 0.0047; r = 0.32), ΔR5-R19 (p = 0.0002; r = 0.41) and ΔX5 (p < 0.0001; r = -0.44), for all subjects. ΔX5 correlated with symptoms in COPD, healthy smokers and patients with asthma. In addition, ΔR5 correlated with asthma symptoms. CONCLUSION EFL was most prominent in parameters measuring peripheral resistance and reactance and correlated with air trapping and airway symptoms.
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Affiliation(s)
- Abir Nasr
- Department of Clinical Sciences, Lund, Respiratory Medicine, Allergology and Palliative Medicine, Lund University, Lund, Sweden
| | - Georgia Papapostolou
- Department of Clinical Sciences, Lund, Respiratory Medicine, Allergology and Palliative Medicine, Lund University, Lund, Sweden
| | - Linnea Jarenbäck
- Department of Clinical Sciences, Lund, Respiratory Medicine, Allergology and Palliative Medicine, Lund University, Lund, Sweden
| | | | - Alf Tunsäter
- Department of Clinical Sciences, Lund, Respiratory Medicine, Allergology and Palliative Medicine, Lund University, Lund, Sweden
| | - Jaro Ankerst
- Department of Clinical Sciences, Lund, Respiratory Medicine, Allergology and Palliative Medicine, Lund University, Lund, Sweden
| | - Leif Bjermer
- Department of Clinical Sciences, Lund, Respiratory Medicine, Allergology and Palliative Medicine, Lund University, Lund, Sweden
| | - Ellen Tufvesson
- Department of Clinical Sciences, Lund, Respiratory Medicine, Allergology and Palliative Medicine, Lund University, Lund, Sweden
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12
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Khalid MB, Zektser E, Chu E, Li M, Utoh J, Ryan P, Loving HS, Harb R, Kattappuram R, Chatman L, Hartono S, Claudio-Etienne E, Sun G, Feener EP, Li Z, Lai SK, Le Q, Schwartz LB, Lyons JJ, Komarow H, Zhou ZH, Raza H, Pao M, Laky K, Holland SM, Brittain E, Frischmeyer-Guerrerio PA. A randomized double-blinded trial to assess recurrence of systemic allergic reactions following COVID-19 mRNA vaccination. J Allergy Clin Immunol 2024; 153:1634-1646. [PMID: 38460680 PMCID: PMC11162316 DOI: 10.1016/j.jaci.2024.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 02/09/2024] [Accepted: 03/05/2024] [Indexed: 03/11/2024]
Abstract
BACKGROUND Systemic allergic reactions (sARs) following coronavirus disease 2019 (COVID-19) mRNA vaccines were initially reported at a higher rate than after traditional vaccines. OBJECTIVE We aimed to evaluate the safety of revaccination in these individuals and to interrogate mechanisms underlying these reactions. METHODS In this randomized, double-blinded, phase 2 trial, participants aged 16 to 69 years who previously reported a convincing sAR to their first dose of COVID-19 mRNA vaccine were randomly assigned to receive a second dose of BNT162b2 (Comirnaty) vaccine and placebo on consecutive days in a blinded, 1:1 crossover fashion at the National Institutes of Health. An open-label BNT162b2 booster was offered 5 months later if the second dose did not result in severe sAR. None of the participants received the mRNA-1273 (Spikevax) vaccine during the study. The primary end point was recurrence of sAR following second dose and booster vaccination; exploratory end points included biomarker measurements. RESULTS Of 111 screened participants, 18 were randomly assigned to receive study interventions. Eight received BNT162b2 second dose followed by placebo; 8 received placebo followed by BNT162b2 second dose; 2 withdrew before receiving any study intervention. All 16 participants received the booster dose. Following second dose and booster vaccination, sARs recurred in 2 participants (12.5%; 95% CI, 1.6 to 38.3). No sAR occurred after placebo. An anaphylaxis mimic, immunization stress-related response (ISRR), occurred more commonly than sARs following both vaccine and placebo and was associated with higher predose anxiety scores, paresthesias, and distinct vital sign and biomarker changes. CONCLUSIONS Our findings support revaccination of individuals who report sARs to COVID-19 mRNA vaccines. Distinct clinical and laboratory features may distinguish sARs from ISRRs.
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Affiliation(s)
- Muhammad B Khalid
- Food Allergy Research Section, Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md
| | - Ellen Zektser
- Food Allergy Research Section, Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md
| | - Eric Chu
- Clinical Monitoring Research Program Directorate, Frederick National Laboratory for Cancer Research, Frederick, Md
| | - Min Li
- Food Allergy Research Section, Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md
| | - Joanna Utoh
- Food Allergy Research Section, Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md
| | - Patrick Ryan
- Office of the Clinical Director, National Institute of Mental Health, National Institutes of Health, Bethesda, Md
| | - Hanna S Loving
- Department of Laboratory Medicine, Clinical Center, National Institutes of Health, Bethesda, Md
| | - Roa Harb
- Department of Laboratory Medicine, Clinical Center, National Institutes of Health, Bethesda, Md
| | - Robbie Kattappuram
- Investigational Drug Management and Research Section, Clinical Center, National Institutes of Health, Bethesda, Md
| | - Lindsay Chatman
- Food Allergy Research Section, Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md
| | - Stella Hartono
- Food Allergy Research Section, Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md
| | - Estefania Claudio-Etienne
- Food Allergy Research Section, Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md
| | - Guangping Sun
- Food Allergy Research Section, Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md
| | | | - Zhongbo Li
- Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina Chapel Hill, Chapel Hill, NC
| | - Samuel K Lai
- Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina Chapel Hill, Chapel Hill, NC
| | - Quang Le
- Department of Internal Medicine, Division of Rheumatology, Allergy, and Immunology, Virginia Commonwealth University, Richmond, Va
| | - Lawrence B Schwartz
- Department of Internal Medicine, Division of Rheumatology, Allergy, and Immunology, Virginia Commonwealth University, Richmond, Va
| | - Jonathan J Lyons
- Translational Allergic Immunopathology Unit, Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md
| | - Hirsh Komarow
- Mast Cell Biology Section, Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md
| | - Zhao-Hua Zhou
- Office of Biotechnology Products, Office of Pharmaceutical Quality, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, Md
| | - Haniya Raza
- Office of the Clinical Director, National Institute of Mental Health, National Institutes of Health, Bethesda, Md
| | - Maryland Pao
- Office of the Clinical Director, National Institute of Mental Health, National Institutes of Health, Bethesda, Md
| | - Karen Laky
- Food Allergy Research Section, Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md
| | - Steven M Holland
- Laboratory of Clinical Immunology and Microbiology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md
| | - Erica Brittain
- Biostatistics Research Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md
| | - Pamela A Frischmeyer-Guerrerio
- Food Allergy Research Section, Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md.
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13
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Lee JX, Ryan M, Mukharesh L, Dahlberg SE, Sun BZ, Hayden L, Phipatanakul W, Gaffin J. Comparison of home-based spirometry and oscillometry measurements in school-age children with bronchopulmonary dysplasia. Pediatr Pulmonol 2024. [PMID: 38804690 DOI: 10.1002/ppul.27072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 05/09/2024] [Accepted: 05/12/2024] [Indexed: 05/29/2024]
Abstract
INTRODUCTION This study compares home-based oscillometry and spirometry for characterizing respiratory system disease in school-aged children with bronchopulmonary dysplasia (BPD) in clinical research. We hypothesized higher rates of successful completion and abnormal cases identified through oscillometry, with correlations between device measurements. METHODS Participants 6-12 years old with BPD in the ongoing Air Quality, Environment and Respiratory Outcomes in BPD (AERO-BPD) study performed oscillometry followed by spirometry at two separate home visits. Parameters measured included airway resistance at 5 Hz(R5), resistance from 5 to 19 Hz(R5-19), resonance frequency(Fres), reactance at 5 Hz(X5), area under the curve between Fres and X5(AX), forced expiratory volume in 1 second(FEV1), forced vital capacity(FVC), and FEV1/FVC. Descriptive statistics identified the proportion of successful tests, correlation in measurements, and rate of lung disease for each device. RESULTS Among 76 subjects with 120 paired observations, 95% and 71% of participants successfully performed oscillometry and spirometry, respectively, at home visit one. 98% and 77% successfully performed oscillometry and spirometry, respectively, at home visit two. Odds ratios favored oscillometry (range 5.31-10.13, p < 0.01). FEV1 correlated with AX (correlation coefficient r = -0.27, p = 0.03); FEV1/FVC with AX (r = -0.32, p = 0.02); and FEV1/FVC with R5 (r = -0.37, p = 0.01). AX exhibited the highest prevalence of abnormality at 25%; other oscillometry parameters ranged from 5%-22%. Forty-five to sixty-four percent of participants had abnormal spirometry. Oscillometry assessments had significantly lower odds of capturing lung disease (odds ratios 0.07-0.24, p < 0.0001). CONCLUSIONS School-aged children with BPD demonstrated higher success rates in field-based oscillometry than spirometry. Spirometry exhibited higher rates of abnormality than oscillometry. Moderate correlation exists between device measurements.
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Affiliation(s)
- Julia X Lee
- Division of Pulmonary Medicine, Boston Children's Hospital, Boston, Massachusetts, USA
| | - Morgan Ryan
- Biostatistics and Research Design Center, Institutional Centers for Clinical and Translational Research, Boston Children's Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - Lana Mukharesh
- Division of Pulmonary Medicine, Boston Children's Hospital, Boston, Massachusetts, USA
| | - Suzanne E Dahlberg
- Division of Pulmonary Medicine, Boston Children's Hospital, Boston, Massachusetts, USA
- Biostatistics and Research Design Center, Institutional Centers for Clinical and Translational Research, Boston Children's Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - Bob Z Sun
- Division of Pulmonary Medicine, Boston Children's Hospital, Boston, Massachusetts, USA
| | - Lystra Hayden
- Division of Pulmonary Medicine, Boston Children's Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - Wanda Phipatanakul
- Harvard Medical School, Boston, Massachusetts, USA
- Division of Allergy and Immunology, Boston Children's Hospital, Boston, Massachusetts, USA
| | - Jonathan Gaffin
- Division of Pulmonary Medicine, Boston Children's Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
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14
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Mercier C, Thoreau B, Flament T, Legué S, Pearson A, Jobard S, Marchand-Adam S, Plantier L, Diot E. High Prevalence of the Lung Ultrasound Interstitial Syndrome in Systemic Sclerosis Patients with Normal HRCT and Lung Function-A Pilot Study. J Clin Med 2024; 13:2885. [PMID: 38792426 PMCID: PMC11121911 DOI: 10.3390/jcm13102885] [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: 03/15/2024] [Revised: 04/24/2024] [Accepted: 05/08/2024] [Indexed: 05/26/2024] Open
Abstract
Objective: High-resolution computed tomography (HRCT) may lack sensitivity for the early detection of interstitial lung disease associated with systemic sclerosis (SSc-ILD). Lung ultrasound is an emerging technique for the diagnosis of SSc-ILD. This cross-sectional study aimed to describe the prevalence of ultrasound interstitial syndrome in SSc patients with normal HRCT and pulmonary function tests (PFT). Methods: Thirty SSc patients with normal HRCT, FVC > 80% predicted and DLCO > 70% predicted were included. Echocardiography and PFT including impulse oscillometry and cardiopulmonary exercise testing were performed. Lung ultrasound was analyzed by two blinded operators. Patients were classified into two groups, according to the presence or absence of ultrasound interstitial syndrome, defined as the sum of B-lines in all thoracic areas ≥10 and/or pleural line thickness >3 mm on at least one thoracic area and/or a pleural line irregularity score >16%. Results: Ultrasound interstitial syndrome was present in 12 patients (40%). Inter-reader agreement for the diagnosis of ultrasound interstitial syndrome defined by the Kappa coefficient was 0.93 (95%CI 0.79-1.00). Patients with ultrasound interstitial syndrome were younger (37 years vs. 53 years, p = 0.009), more often had pitting scars (n = 7/12 vs. 3/18, p = 0.045) and had lower FVC (102 vs. 110% pred, p = 0.009), TLC (114 vs. 122% pred, p = 0.042) and low-frequency respiratory system reactance (Xrs5 Z-score 0.16 vs. 1.02, p = 0.018), while pulmonary gas exchange was similar. Conclusions: Ultrasound interstitial syndrome was detected in 12/30 SSc patients with normal HRCT and PFT. Patients with ultrasound interstitial syndrome had differences in lung function consistent with reduced respiratory compliance, suggesting minimal and/or early suspected SSc-ILD.
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Affiliation(s)
- Camille Mercier
- Service de Médecine Interne et Immunologie Clinique, Centre de Compétence Maladies Systémiques Auto-Immunes Rares, CHRU Tours, 37000 Tours, France; (S.J.); (E.D.)
| | - Benjamin Thoreau
- Service de Médecine Interne, Centre de Référence Maladies Systémiques Auto-Immunes Rares d’Ile de France, Assistance Publique-Hôpitaux de Paris (AP-HP), 75610 Paris, France;
- Institut Cochin, Inserm U1016, CNRS UMR 8104, Université Paris Cité, 75006 Paris, France
| | - Thomas Flament
- Service de Pneumologie et Explorations Fonctionnelles Respiratoires, Centre de Référence Maladies Pulmonaires Rares, CHRU Tours, 37000 Tours, France; (T.F.); (S.L.); (S.M.-A.); (L.P.)
- Lung Ultrasound Working Group (G-ECHO), Société de Pneumologie de Langue Française, Île-de-France, 75935 Paris, France
| | - Sylvie Legué
- Service de Pneumologie et Explorations Fonctionnelles Respiratoires, Centre de Référence Maladies Pulmonaires Rares, CHRU Tours, 37000 Tours, France; (T.F.); (S.L.); (S.M.-A.); (L.P.)
- Lung Ultrasound Working Group (G-ECHO), Société de Pneumologie de Langue Française, Île-de-France, 75935 Paris, France
| | | | - Stephanie Jobard
- Service de Médecine Interne et Immunologie Clinique, Centre de Compétence Maladies Systémiques Auto-Immunes Rares, CHRU Tours, 37000 Tours, France; (S.J.); (E.D.)
| | - Sylvain Marchand-Adam
- Service de Pneumologie et Explorations Fonctionnelles Respiratoires, Centre de Référence Maladies Pulmonaires Rares, CHRU Tours, 37000 Tours, France; (T.F.); (S.L.); (S.M.-A.); (L.P.)
- Centre d’Etudes des Pathologies Respiratoires (CEPR), Institut National de la Recherche Médicale (INSERM), Unité Mixte de Recherche (UMR) 1100, Université de Tours, 37032 Tours, France
| | - Laurent Plantier
- Service de Pneumologie et Explorations Fonctionnelles Respiratoires, Centre de Référence Maladies Pulmonaires Rares, CHRU Tours, 37000 Tours, France; (T.F.); (S.L.); (S.M.-A.); (L.P.)
- Centre d’Etudes des Pathologies Respiratoires (CEPR), Institut National de la Recherche Médicale (INSERM), Unité Mixte de Recherche (UMR) 1100, Université de Tours, 37032 Tours, France
| | - Elisabeth Diot
- Service de Médecine Interne et Immunologie Clinique, Centre de Compétence Maladies Systémiques Auto-Immunes Rares, CHRU Tours, 37000 Tours, France; (S.J.); (E.D.)
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15
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Meoli A, Trischler J, Hutter M, Dressler M, Esposito S, Blümchen K, Zielen S, Schulze J. Impulse oscillometry bronchodilator response in preschool children. Pediatr Pulmonol 2024; 59:1321-1329. [PMID: 38353391 DOI: 10.1002/ppul.26909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 01/03/2024] [Accepted: 01/31/2024] [Indexed: 02/24/2024]
Abstract
BACKGROUND In preschoolers, performing an acceptable spirometry and measuring bronchodilator response (BDR) is challenging; in this context, impulse oscillometry (IOS) represents a valid alternative. However, more studies on the standardization of BDR for IOS in young children are required. OBJECTIVE The objective of the study was to identify optimal thresholds to define a positive BDR test with IOS in preschoolers with suspected asthma. METHODS Children aged 3-6 years with suspected asthma and their lung function investigated with both IOS and spirometry pre- and post-BDR were retrospectively analyzed. The spirometric BDR was defined as positive when the change of FEV1 was ≥12% or ≥200 mL. The oscillometric BDR was defined as positive in case of change of at least -40% in R5, +50% in X5, and -80% in AX. RESULTS Among 72 patients, 36 (age 5.2 ± 1 years; 64% boys) were selected for the subsequent analysis according to ATS/ERS quality criteria of measurements; specifically, 19 patients did not meet IOS and 36 did not meet spirometry criteria. The spirometric BDR was found positive in seven subjects (19.4%); conversely, a positive oscillometric BDR was identified in four patients (11.1%). No patient presented a positive BDR response with both methods. In IOS, the mean decrease in R5 and AX was 19.9% ± 10% and 44% ± 22.1%, and the mean increase in X5 was 23.3% ± 17.8%, respectively. A decrease in R5 of 25.7% (AUC 0.77, p = .03) and an increase in X5 of 25.7% (AUC 0.75, p = .04) showed the best combination of sensitivity and specificity to detect an increase of FEV1 ≥ 12% and/or ≥200 mL. CONCLUSION The IOS represents a valid alternative to spirometry to measure BDR in preschool children and should be the gold standard in this age group. We are considering a decrease of 26% in R5 and an increase of 26% in X5 as diagnostic threshold for BDR.
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Affiliation(s)
- Aniello Meoli
- Department for Children and Adolescents, Division of Allergology, Pulmonology and Cystic fibrosis, Frankfurt am Main, Germany
- Department of Medicine and Surgery, Pediatric Clinic, University Hospital of Parma, Parma, Italy
| | - Jordis Trischler
- Department for Children and Adolescents, Division of Allergology, Pulmonology and Cystic fibrosis, Frankfurt am Main, Germany
| | - Martin Hutter
- Department for Children and Adolescents, Division of Allergology, Pulmonology and Cystic fibrosis, Frankfurt am Main, Germany
| | - Melanie Dressler
- Department for Children and Adolescents, Division of Allergology, Pulmonology and Cystic fibrosis, Frankfurt am Main, Germany
| | - Susanna Esposito
- Department of Medicine and Surgery, Pediatric Clinic, University Hospital of Parma, Parma, Italy
| | - Katharina Blümchen
- Department for Children and Adolescents, Division of Allergology, Pulmonology and Cystic fibrosis, Frankfurt am Main, Germany
| | - Stefan Zielen
- Department for Children and Adolescents, Division of Allergology, Pulmonology and Cystic fibrosis, Frankfurt am Main, Germany
| | - Johannes Schulze
- Department for Children and Adolescents, Division of Allergology, Pulmonology and Cystic fibrosis, Frankfurt am Main, Germany
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Donohue PA, Kaminsky DA. The role of oscillometry in asthma. Curr Opin Pulm Med 2024; 30:268-275. [PMID: 38411171 DOI: 10.1097/mcp.0000000000001057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
PURPOSE OF REVIEW Oscillometry is a noninvasive pulmonary function test that has gained significant interest in the evaluation of lung disease. Currently, oscillometry is primarily a research tool, but there is a growing body of evidence supporting its clinical use. This review describes the recent work evaluating the role of oscillometry in the diagnosis and treatment of asthma. RECENT FINDINGS A large body of observational data supports the ability of oscillometry to distinguish healthy individuals from those with respiratory symptoms or lung disease. Oscillometry may not be as useful as an isolated diagnostic test in asthma, but the combination with other pulmonary function tests may improve its diagnostic ability. Oscillometry can detect peripheral airways dysfunction in asthma, which is associated with symptoms and the risk for exacerbations. To help guide future research, minimal clinically important differences for specific oscillometry variables have been developed. Oscillometry may be useful in monitoring the response to biological therapy and has potential for personalizing treatment for individual patients. Oscillometry also has potential in uncovering unique aspects of the pathophysiology of asthma in obesity. SUMMARY Oscillometry is a promising tool in the diagnosis and management of asthma. More research is needed to support its routine clinical use.
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Affiliation(s)
- Patrick A Donohue
- Division of Pulmonary and Critical Care Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York
| | - David A Kaminsky
- Division of Pulmonary and Critical Care, University of Vermont Larner College of Medicine, Burlington, Vermont, USA
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Carpagnano GE, Portacci A, Dragonieri S, Montagnolo F, Iorillo I, Lulaj E, Maselli L, Buonamico E, Quaranta VN. Managing Small Airway Disease in Patients with Severe Asthma: Transitioning from the "Silent Zone" to Achieving "Quiet Asthma". J Clin Med 2024; 13:2320. [PMID: 38673593 PMCID: PMC11051485 DOI: 10.3390/jcm13082320] [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: 03/01/2024] [Revised: 04/11/2024] [Accepted: 04/14/2024] [Indexed: 04/28/2024] Open
Abstract
Background/Objectives: Several studies have demonstrated the positive clinical and functional impact of adding Long-Acting Muscarinic Antagonist (LAMA) to Inhaled Corticosteroids (ICS) and Long-Acting Beta-Agonists (LABA) therapy in the treatment of severe asthma. Aim and objectives: To demonstrate that treating Small Airways Disease (SAD) in severe asthma patients who are candidates for biologics can improve respiratory symptoms, lung function, and airways inflammation, potentially avoiding or delaying the use of biological therapy. Methods: Thirty-two severe asthma patients with SAD were transitioned from separate inhalers for ICS/LABA and LAMA to extrafine single-inhaler beclomethasone, formoterol, and glycopyrronium. None of these patients underwent biological therapy before the study. Follow-up evaluations were conducted at baseline (T0) and three months after initiation (T3). Assessments included clinical evaluations, spirometry, oscillometry, and inflammation markers. Results: Transitioning to single-inhaler triple therapy from T0 to T3 resulted in significant improvements in Asthma Control Test (ACT) and SAD parameters, including increased Forced Expiratory Volume in the mid-range of lung capacity and improved airway resistance and reactance measurements using impulse oscillometry. A significant reduction in airway inflammation was evidenced by lower levels of Fractional Exhaled Nitric Oxide 350 (FeNO 350) (p < 0.001 for all). Conclusions: Adopting a single-inhaler triple therapy notably enhanced clinical control and small airway function in patients with severe asthma and SAD, supporting the positive impact of target-therapy for the achievement of a stable state termed "Quiet Asthma".
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Affiliation(s)
| | | | - Silvano Dragonieri
- Respiratory Diseases, University of Bari, 70121 Bari, Italy; (G.E.C.); (A.P.); (F.M.); (I.I.); (E.L.); (L.M.); (E.B.); (V.N.Q.)
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Belousova N, Cheng A, Matelski J, Vasileva A, Wu JKY, Ghany R, Martinu T, Ryan CM, Chow CW. Effects of donor smoking history on early post-transplant lung function measured by oscillometry. Front Med (Lausanne) 2024; 11:1328395. [PMID: 38654829 PMCID: PMC11037252 DOI: 10.3389/fmed.2024.1328395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 03/22/2024] [Indexed: 04/26/2024] Open
Abstract
Introduction Prior studies assessing outcomes of lung transplants from cigarette-smoking donors found mixed results. Oscillometry, a non-invasive test of respiratory impedance, detects changes in lung function of smokers prior to diagnosis of COPD, and identifies spirometrically silent episodes of rejection post-transplant. We hypothesise that oscillometry could identify abnormalities in recipients of smoking donor lungs and discriminate from non-smoking donors. Methods This prospective single-center cohort study analysed 233 double-lung recipients. Oscillometry was performed alongside routine conventional pulmonary function tests (PFT) post-transplant. Multivariable regression models were constructed to compare oscillometry and conventional PFT parameters between recipients of lungs from smoking vs non-smoking donors. Results The analysis included 109 patients who received lungs from non-smokers and 124 from smokers. Multivariable analysis identified significant differences between recipients of smoking and non-smoking lungs in the oscillometric measurements R5-19, X5, AX, R5z and X5z, but no differences in %predicted FEV1, FEV1/FVC, %predicted TLC or %predicted DLCO. An analysis of the smoking group also demonstrated associations between increasing smoke exposure, quantified in pack years, and all the oscillometry parameters, but not the conventional PFT parameters. Conclusion An interaction was identified between donor-recipient sex match and the effect of smoking. The association between donor smoking and oscillometry outcomes was significant predominantly in the female donor/female recipient group.
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Affiliation(s)
- Natalia Belousova
- Toronto Lung Transplant Program, Ajmera Multi-Organ Transplant Program and Division of Respirology, University Health Network, Tonronto, ON, Canada
- Department of Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- Pneumology, Aduch Cystic Fibrosis and Lung Transplantation Department, Foch Hospital, Suresnes, France
| | - Albert Cheng
- Department of Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - John Matelski
- Pneumology, Aduch Cystic Fibrosis and Lung Transplantation Department, Foch Hospital, Suresnes, France
| | - Anastasiia Vasileva
- Department of Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Joyce K. Y. Wu
- Toronto General Pulmonary Function Laboratory, University Health Network, Toronto, ON, Canada
| | - Rasheed Ghany
- Toronto Lung Transplant Program, Ajmera Multi-Organ Transplant Program and Division of Respirology, University Health Network, Tonronto, ON, Canada
| | - Tereza Martinu
- Toronto Lung Transplant Program, Ajmera Multi-Organ Transplant Program and Division of Respirology, University Health Network, Tonronto, ON, Canada
- Department of Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Clodagh M. Ryan
- Department of Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- Toronto General Pulmonary Function Laboratory, University Health Network, Toronto, ON, Canada
| | - Chung-Wai Chow
- Toronto Lung Transplant Program, Ajmera Multi-Organ Transplant Program and Division of Respirology, University Health Network, Tonronto, ON, Canada
- Department of Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
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Papadopoulos NG, Custovic A, Deschildre A, Gern JE, Nieto Garcia A, Miligkos M, Phipatanakul W, Wong G, Xepapadaki P, Agache I, Arasi S, Awad El-Sayed Z, Bacharier LB, Bonini M, Braido F, Caimmi D, Castro-Rodriguez JA, Chen Z, Clausen M, Craig T, Diamant Z, Ducharme FM, Ebisawa M, Eigenmann P, Feleszko W, Fierro V, Fiocchi A, Garcia-Marcos L, Goh A, Gómez RM, Gotua M, Hamelmann E, Hedlin G, Hossny EM, Ispayeva Z, Jackson DJ, Jartti T, Jeseňák M, Kalayci O, Kaplan A, Konradsen JR, Kuna P, Lau S, Le Souef P, Lemanske RF, Levin M, Makela MJ, Mathioudakis AG, Mazulov O, Morais-Almeida M, Murray C, Nagaraju K, Novak Z, Pawankar R, Pijnenburg MW, Pite H, Pitrez PM, Pohunek P, Price D, Priftanji A, Ramiconi V, Rivero Yeverino D, Roberts G, Sheikh A, Shen KL, Szepfalusi Z, Tsiligianni I, Turkalj M, Turner S, Umanets T, Valiulis A, Vijveberg S, Wang JY, Winders T, Yon DK, Yusuf OM, Zar HJ. Recommendations for asthma monitoring in children: A PeARL document endorsed by APAPARI, EAACI, INTERASMA, REG, and WAO. Pediatr Allergy Immunol 2024; 35:e14129. [PMID: 38664926 DOI: 10.1111/pai.14129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 03/22/2024] [Accepted: 03/25/2024] [Indexed: 05/08/2024]
Abstract
Monitoring is a major component of asthma management in children. Regular monitoring allows for diagnosis confirmation, treatment optimization, and natural history review. Numerous factors that may affect disease activity and patient well-being need to be monitored: response and adherence to treatment, disease control, disease progression, comorbidities, quality of life, medication side-effects, allergen and irritant exposures, diet and more. However, the prioritization of such factors and the selection of relevant assessment tools is an unmet need. Furthermore, rapidly developing technologies promise new opportunities for closer, or even "real-time," monitoring between visits. Following an approach that included needs assessment, evidence appraisal, and Delphi consensus, the PeARL Think Tank, in collaboration with major international professional and patient organizations, has developed a set of 24 recommendations on pediatric asthma monitoring, to support healthcare professionals in decision-making and care pathway design.
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Affiliation(s)
- Nikolaos G Papadopoulos
- Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, The University of Manchester, Manchester, UK
- Allergy Department, 2nd Paediatric Clinic, National and Kapodistrian University of Athens, Athens, Greece
| | - Adnan Custovic
- Department of Pediatrics, Imperial College London, London, UK
| | - Antoine Deschildre
- Univ. Lille, Pediatric Pulmonology and Allergy Department, Hôpital Jeanne de Flandre, CHU Lille, Lille cedex, France
| | - James E Gern
- Department of Pediatrics and Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Antonio Nieto Garcia
- Pediatric Pulmonology & Allergy Unit Children's Hospital la Fe, Health Research Institute La Fe, Valencia, Spain
| | - Michael Miligkos
- Allergy Department, 2nd Paediatric Clinic, National and Kapodistrian University of Athens, Athens, Greece
| | - Wanda Phipatanakul
- Children's Hospital Boston, Pediatric Allergy and Immunology, Boston, Massachusetts, USA
| | - Gary Wong
- Department of Pediatrics, Faculty of Medicine, The Chinese University of Hong Kong, Sha Tin, Hong Kong
| | - Paraskevi Xepapadaki
- Allergy Department, 2nd Paediatric Clinic, National and Kapodistrian University of Athens, Athens, Greece
| | - Ioana Agache
- Allergy & Clinical Immunology, Transylvania University, Brasov, Romania
| | - Stefania Arasi
- Allergy Department, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Zeinab Awad El-Sayed
- Pediatric Allergy, Immunology and Rheumatology Unit, Children's Hospital, Ain Shams University, Cairo, Egypt
| | - Leonard B Bacharier
- Division of Allergy, Immunology, and Pulmonary Medicine, Department of Pediatrics, Monroe Carell Jr Children's Hospital at Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Matteo Bonini
- Department of Cardiovascular and Pulmonary Sciences, Università Cattolica del Sacro Cuore, Rome, Italy
- National Heart and Lung Institute (NHLI), Imperial College London, London, UK
| | - Fulvio Braido
- University of Genoa, Genoa, Italy
- Respiratory Diseases and Allergy Department, Research Institute and Teaching Hospital San Martino, Genoa, Italy
- Interasma - Global Asthma Association (GAA)
| | - Davide Caimmi
- Allergy Unit, CHU de Montpellier, Montpellier, France
- IDESP, UA11 INSERM-Universitè de Montpellier, Montpellier, France
| | - Jose A Castro-Rodriguez
- Department of Pediatrics Pulmonology, School of Medicine, Pontifical Universidad Catolica de Chile, Santiago, Chile
| | - Zhimin Chen
- Pulmonology Department, Children's Hospital Zhejiang University School of Medicine, Hangzhou, China
| | - Michael Clausen
- Children's Hospital, Landspitali University Hospital, Reykjavik, Iceland
| | - Timothy Craig
- Department of Allergy and Immunology, Penn State University, Hershey, Pennsylvania, USA
- Vinmec International Hospital, Hanoi, Vietnam
| | - Zuzana Diamant
- Department of Clinical Pharmacy & Pharmacology, University of Groningen, University Medical Center of Groningen and QPS-NL, Groningen, The Netherlands
- Department of Pediatrics and of Social and Preventive Medicine, University of Montreal, Montreal, Québec, Canada
| | - Francine M Ducharme
- National Hospital Organization Sagamihara National Hospital, Sagamihara, Kanagawa, Japan
| | - Motohiro Ebisawa
- Department of Women-Children-Teenagers, University Hospital of Geneva, Geneva, Switzerland
| | - Philippe Eigenmann
- Department of Pediatric Respiratory Diseases and Allergy, The Medical University of Warsaw, Warsaw, Poland
| | - Wojciech Feleszko
- Pediatric Respiratory and Allergy Units, "Virgen de la Arrixaca" Children's University Clinical Hospital, University of Murcia, Murcia, Spain
| | - Vincezo Fierro
- Allergy Department, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Alessandro Fiocchi
- Allergy Department, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Luis Garcia-Marcos
- Department of Pediatrics, Respiratory Medicine Service, KK Women's and Children's Hospital, Singapore City, Singapore
| | - Anne Goh
- Faculty of Health Sciences, Catholic University of Salta, Salta, Argentina
| | | | - Maia Gotua
- Children's Center Bethel, Evangelical Hospital Bethel, University of Bielefeld, Bielefeld, Germany
| | - Eckard Hamelmann
- Paediatric Allergy, Centre for Allergy Research, Karolinska Institutet, Solna, Sweden
| | - Gunilla Hedlin
- Department of Allergology and Clinical Immunology, Kazakh National Medical University, Almaty, Kazakhstan
| | - Elham M Hossny
- Pediatric Allergy, Immunology and Rheumatology Unit, Children's Hospital, Ain Shams University, Cairo, Egypt
| | - Zhanat Ispayeva
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Daniel J Jackson
- Department of Pediatrics, Turku University Hospital and University of Turku, Turku, Finland
| | - Tuomas Jartti
- Department of Pediatrics, Jessenius Faculty of Medicine in Martin, Center for Vaccination in Special Situations, University Hospital in Martin, Comenius University in Bratislava, Bratislava, Slovakia
| | - Miloš Jeseňák
- Department of Clinical Immunology and Allergology, Jessenius Faculty of Medicine in Martin, Center for Vaccination in Special Situations, University Hospital in Martin, Comenius University in Bratislava, Bratislava, Slovakia
- Pediatric Allergy and Asthma Unit, Hacettepe University School of Medicine, Ankara, Turkey
| | - Omer Kalayci
- Chair Family Physician Airways Group of Canada, Ontario, Canada
| | - Alan Kaplan
- Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden
| | - Jon R Konradsen
- Department of Internal Medicine, Asthma and Allergy, Medical University of Lodz, Lodz, Poland
| | - Piotr Kuna
- Charité Universitätsmedizin Berlin, Pediatric Respiratpry Medicine, Immunology and Intensive Care Medicine, Berlin, Germany
| | - Susanne Lau
- School of Medicine, University of Western Australia, Perth, Western Australia, Australia
| | - Peter Le Souef
- Department of Pediatrics and Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Robert F Lemanske
- Division of Paediatric Allergy, Department of Paediatrics, University of Cape Town, Cape Town, South Africa
| | - Michael Levin
- inVIVO Planetary Health Group of the Worldwide Universities Network
- Department of Allergy, Helsinki University Central Hospital, Helsinki, Finland
| | - Mika J Makela
- North West Lung Centre, Wythenshawe Hospital, Manchester University NHS Foundation Trust, Manchester, UK
| | - Alexander G Mathioudakis
- Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, The University of Manchester, Manchester, UK
- First Pediatric Department of Pediatrics, National Pirogov Memorial Medical University, Vinnytsia Children's Regional Hospital, Vinnytsia Oblast, Ukraine
| | | | | | - Clare Murray
- Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, The University of Manchester, Manchester, UK
| | | | - Zoltan Novak
- Department of Pediatrics, Nippon Medical School, Tokyo, Japan
| | - Ruby Pawankar
- Division of Respiratory Medicine and Allergology, Department of Pediatrics, Erasmus University Medical Centre - Sophia Children's Hospital, Rotterdam, The Netherlands
| | - Marielle W Pijnenburg
- Allergy Center, CUF Descobertas Hospital and CUF Tejo HospitalInfante Santo Hospital, Lisbon, Portugal
| | - Helena Pite
- NOVA Medical School, Universidade NOVA de Lisboa, Lisbon, Portugal
- Pulmonary Division, Hospital Santa Casa de Porto Alegre, Porto Alegre, Brazil
| | - Paulo M Pitrez
- Pediatric Pulmonology, Pediatric Department, 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Petr Pohunek
- University Hospital Motol, Prague, Czech Republic
| | - David Price
- Division of Applied Health Sciences, Centre of Academic Primary Care, University of Aberdeen, Aberdeen, UK
- Observational and Pragmatic Research Institute, Singapore City, Singapore
| | - Alfred Priftanji
- Department of Allergy, Mother Theresa School of Medicine, University of Tirana, Tirana, Albania
| | - Valeria Ramiconi
- The European Federation of Allergy and Airways Diseases Patients' Associations (EFA), Brussels, Belgium
| | | | - Graham Roberts
- Paediatric Allergy and Respiratory Medicine within Medicine at the University of Southampton, Southampton, UK
| | - Aziz Sheikh
- Asthma UK Centre for Applied Research, Usher Institute of Population Health Sciences and Informatics, The University of Edinburgh, Edinburgh, UK
| | - Kun-Ling Shen
- Department of Respiratory Medicine, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, China
| | - Zsolt Szepfalusi
- Division of Pediatric Pulmonology, Allergy and Endocrinologyneumology, Department of Pediatrics and Juvenile Medicine, Comprehensive Center Pediatrics, Medical University of Vienna, Vienna, Austria
| | - Ioanna Tsiligianni
- Health Planning Unit, Department of Social Medicine, Faculty of Medicine, University of Crete, Crete, Greece
| | | | - Steve Turner
- Medical School of Catholic University of Croatia, Zagreb, Croatia
| | - Tetiana Umanets
- Child Health, Royal Aberdeen Children's Hospital and University of Aberdeen, Aberdeen, UK
- Department of Respiratory Diseases and Respiratory Allergy in Children, SI "Institute of Pediatrics, Obstetrics and Gynecology named after Academician O. Lukjanova of NAMS of Ukraine, Kyiv, Ukraine
| | - Arunas Valiulis
- Clinic of Children's Diseases, Institute of Clinical Medicine, Medical Faculty of Vilnius University, Vilnius, Lithuania
| | - Susanne Vijveberg
- Department of Paediatric Pulmonology, Amsterdam Public Health Research Institute, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Jiu-Yao Wang
- China Medical University Children's Hospital Taichung, Taichung, Taiwan
| | | | - Dong Keon Yon
- Department of Pediatrics, Kyung Hee University Medical Center, Kyung Hee University College of Medicine, Seoul, South Korea
| | | | - Heather J Zar
- Department of Pediatrics & Child Health, Director MRC Unit on Child & Adolescent Health, Red Cross War Memorial Children's Hospital, University of Cape Town, Cape Town, South Africa
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Lu L, Wu F, Peng J, Wu X, Hou X, Zheng Y, Yang H, Deng Z, Dai C, Zhao N, Zhou K, Wan Q, Tang G, Cui J, Yu S, Luo X, Yang C, Chen S, Ran P, Zhou Y. Clinical characterization and outcomes of impulse oscillometry-defined bronchodilator response: an ECOPD cohort-based study. Respir Res 2024; 25:149. [PMID: 38555433 PMCID: PMC10981824 DOI: 10.1186/s12931-024-02765-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Accepted: 03/11/2024] [Indexed: 04/02/2024] Open
Abstract
BACKGROUND The clinical significance of the impulse oscillometry-defined small airway bronchodilator response (IOS-BDR) is not well-known. Accordingly, this study investigated the clinical characteristics of IOS-BDR and explored the association between lung function decline, acute respiratory exacerbations, and IOS-BDR. METHODS Participants were recruited from an Early Chronic Obstructive Pulmonary Disease (ECOPD) cohort subset and were followed up for two years with visits at baseline, 12 months, and 24 months. Chronic obstructive pulmonary disease (COPD) was defined as a post-bronchodilator forced expiratory volume in 1 s (FEV1)/forced vital capacity (FVC) ratio < 0.70. IOS-BDR was defined as meeting any one of the following criteria: an absolute change in respiratory system resistance at 5 Hz ≤ - 0.137 kPa/L/s, an absolute change in respiratory system reactance at 5 Hz ≥ 0.055 kPa/L/s, or an absolute change in reactance area ≤ - 0.390 kPa/L. The association between IOS-BDR and a decline in lung function was explored with linear mixed-effects model. The association between IOS-BDR and the risk of acute respiratory exacerbations at the two-year follow-up was analyzed with the logistic regression model. RESULTS This study involved 466 participants (92 participants with IOS-BDR and 374 participants without IOS-BDR). Participants with IOS-BDR had higher COPD assessment test and modified Medical Research Council dyspnea scale scores, more severe emphysema, air trapping, and rapid decline in FVC than those without IOS-BDR over 2-year follow-up. IOS-BDR was not associated with the risk of acute respiratory exacerbations at the 2-year follow-up. CONCLUSIONS The participants with IOS-BDR had more respiratory symptoms, radiographic structural changes, and had an increase in decline in lung function than those without IOS-BDR. TRIAL REGISTRATION Chinese Clinical Trial Registry, ChiCTR1900024643. Registered on 19 July, 2019.
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Affiliation(s)
- Lifei Lu
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Fan Wu
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- Guangzhou National Laboratory, Guangzhou, China
| | - Jieqi Peng
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- Guangzhou National Laboratory, Guangzhou, China
| | - Xiaohui Wu
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | | | | | - Huajing Yang
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Zhishan Deng
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Cuiqiong Dai
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Ningning Zhao
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Kunning Zhou
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Qi Wan
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Gaoying Tang
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Jiangyu Cui
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Shuqing Yu
- Lianping County People's Hospital, Heyuan, China
| | - Xiangwen Luo
- Lianping County People's Hospital, Heyuan, China
| | - Changli Yang
- Wengyuan County People's Hospital, Shaoguan, China
| | | | - Pixin Ran
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
- Guangzhou National Laboratory, Guangzhou, China.
| | - Yumin Zhou
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
- Guangzhou National Laboratory, Guangzhou, China.
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Torregiani C, Baratella E, Segalotti A, Ruaro B, Salton F, Confalonieri P, Tavano S, Lapadula G, Bozzi C, Confalonieri M, Dellaca’ RL, Veneroni C. Oscillometry Longitudinal Data on COVID-19 Acute Respiratory Syndrome Treated with Non-Invasive Respiratory Support. J Clin Med 2024; 13:1868. [PMID: 38610633 PMCID: PMC11012861 DOI: 10.3390/jcm13071868] [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: 01/04/2024] [Revised: 03/02/2024] [Accepted: 03/16/2024] [Indexed: 04/14/2024] Open
Abstract
Background: Oscillometry allows for the non-invasive measurements of lung mechanics. In COVID-19 ARDS patients treated with Non-Invasive Oxygen Support (NI-OS), we aimed to (1) observe lung mechanics at the patients' admission and their subsequent changes, (2) compare lung mechanics with clinical and imaging data, and (3) evaluate whether lung mechanics helps to predict clinical outcomes. Methods: We retrospectively analyzed the data from 37 consecutive patients with moderate-severe COVID-19 ARDS. Oscillometry was performed on their 1st, 4th, and 7th day of hospitalization. Resistance (R5), reactance (X5), within-breath reactance changes (ΔX5), and the frequency dependence of the resistance (R5-R19) were considered. Twenty-seven patients underwent computed tomographic pulmonary angiography (CTPA): collapsed, poorly aerated, and normally inflated areas were quantified. Adverse outcomes were defined as intubation or death. Results: Thirty-two patients were included in this study. At the first measurement, only 44% of them had an abnormal R5 or X5. In total, 23 patients had measurements performed on their 3rd day and 7 on their 7th day of hospitalization. In general, their R5, R5-R19, and ΔX decreased with time, while their X5 increased. Collapsed areas on the CTPA correlated with the X5 z-score (ρ = -0.38; p = 0.046), while poorly aerated areas did not. Seven patients had adverse outcomes but did not present different oscillometry parameters on their 1st day of hospitalization. Conclusions: Our study confirms the feasibility of oscillometry in critically ill patients with COVID-19 pneumonia undergoing NI-OS. The X5 z-scores indicates collapsed but not poorly aerated lung areas in COVID-19 pneumonia. Our data, which show a severe impairment of gas exchange despite normal reactance in most patients with COVID-19 ARDS, support the hypothesis of a composite COVID-19 ARDS physiopathology.
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Affiliation(s)
- Chiara Torregiani
- Pulmonology Unit, Department of Medical Surgical and Health Sciences, University of Trieste, Hospital of Cattinara, 34149 Trieste, Italy
| | - Elisa Baratella
- Radiology Unit, Department of Medical Surgical and Health Sciences, University Hospital of Cattinara, 34149 Trieste, Italy
| | - Antonio Segalotti
- Radiology Unit, Department of Medical Surgical and Health Sciences, University Hospital of Cattinara, 34149 Trieste, Italy
| | - Barbara Ruaro
- Pulmonology Unit, Department of Medical Surgical and Health Sciences, University of Trieste, Hospital of Cattinara, 34149 Trieste, Italy
| | - Francesco Salton
- Pulmonology Unit, Department of Medical Surgical and Health Sciences, University of Trieste, Hospital of Cattinara, 34149 Trieste, Italy
| | - Paola Confalonieri
- Pulmonology Unit, Department of Medical Surgical and Health Sciences, University of Trieste, Hospital of Cattinara, 34149 Trieste, Italy
| | - Stefano Tavano
- Pulmonology Unit, Department of Medical Surgical and Health Sciences, University of Trieste, Hospital of Cattinara, 34149 Trieste, Italy
| | - Giulia Lapadula
- Pulmonology Unit, Department of Medical Surgical and Health Sciences, University of Trieste, Hospital of Cattinara, 34149 Trieste, Italy
| | - Chiara Bozzi
- Pulmonology Unit, Department of Medical Surgical and Health Sciences, University of Trieste, Hospital of Cattinara, 34149 Trieste, Italy
| | - Marco Confalonieri
- Pulmonology Unit, Department of Medical Surgical and Health Sciences, University of Trieste, Hospital of Cattinara, 34149 Trieste, Italy
| | - Raffaele L. Dellaca’
- Department of Electronics, Information and Biomedical Engineering (DEIB), TechRes Lab, Politecnico di Milano University, 20122 Milano, Italy; (R.L.D.); (C.V.)
| | - Chiara Veneroni
- Department of Electronics, Information and Biomedical Engineering (DEIB), TechRes Lab, Politecnico di Milano University, 20122 Milano, Italy; (R.L.D.); (C.V.)
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McCollum ED, Checkley W, Balakrishnan K, Clasen TF, Peel JL. Fetal and Early-Life Stove and Fuel Interventions and Respiratory Oscillometry Lung Function Measures in Preschool-Aged Children from Ghana. Am J Respir Crit Care Med 2024; 209:625-626. [PMID: 38290112 PMCID: PMC10945070 DOI: 10.1164/rccm.202311-2197ed] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 01/30/2024] [Indexed: 02/01/2024] Open
Affiliation(s)
- Eric D McCollum
- School of Medicine
- Bloomberg School of Public Health Johns Hopkins University Baltimore, Maryland
| | - William Checkley
- School of Medicine
- Bloomberg School of Public Health Johns Hopkins University Baltimore, Maryland
| | - Kalpana Balakrishnan
- Department of Environmental Health Engineering Sri Ramachandra Institute for Higher Education and Research Chennai, India
| | - Thomas F Clasen
- Rollins School of Public Health Emory University Atlanta, Georgia
| | - Jennifer L Peel
- Department of Environmental and Radiological Health Sciences Colorado State University Fort Collins, Colorado
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23
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Agyapong PD, Jack D, Kaali S, Colicino E, Mujtaba MN, Chillrud SN, Osei M, Gennings C, Agyei O, Kinney PL, Kwarteng A, Perzanowski M, Dwommoh Prah RK, Tawiah T, Asante KP, Lee AG. Household Air Pollution and Child Lung Function: The Ghana Randomized Air Pollution and Health Study. Am J Respir Crit Care Med 2024; 209:716-726. [PMID: 38016085 DOI: 10.1164/rccm.202303-0623oc] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 11/28/2023] [Indexed: 11/30/2023] Open
Abstract
Rationale: The impact of a household air pollution (HAP) stove intervention on child lung function has been poorly described. Objectives: To assess the effect of a HAP stove intervention for infants prenatally to age 1 on, and exposure-response associations with, lung function at child age 4. Methods: The Ghana Randomized Air Pollution and Health Study randomized pregnant women to liquefied petroleum gas (LPG), improved biomass, or open-fire (control) stove conditions through child age 1. We quantified HAP exposure by repeated maternal and child personal carbon monoxide (CO) exposure measurements. Children performed oscillometry, an effort-independent lung function measurement, at age 4. We examined associations between Ghana Randomized Air Pollution and Health Study stove assignment and prenatal and infant CO measurements and oscillometry using generalized linear regression models. We used reverse distributed lag models to examine time-varying associations between prenatal CO and oscillometry. Measurements and Main Results: The primary oscillometry measure was reactance at 5 Hz, X5, a measure of elastic and inertial lung properties. Secondary measures included total, large airway, and small airway resistance at 5 Hz, 20 Hz, and the difference in resistance at 5 Hz and 20 Hz (R5, R20, and R5-20, respectively); area of reactance (AX); and resonant frequency. Of the 683 children who attended the lung function visit, 567 (83%) performed acceptable oscillometry. A total of 221, 106, and 240 children were from the LPG, improved biomass, and control arms, respectively. Compared with control, the improved biomass stove condition was associated with lower reactance at 5 Hz (X5 z-score: β = -0.25; 95% confidence interval [CI] = -0.39, -0.11), higher large airway resistance (R20 z-score: β = 0.34; 95% CI = 0.23, 0.44), and higher AX (AX z-score: β = 0.16; 95% CI = 0.06, 0.26), which is suggestive of overall worse lung function. The LPG stove condition was associated with higher X5 (X5 score: β = 0.16; 95% CI = 0.01, 0.31) and lower small airway resistance (R5-20 z-score: β = -0.15; 95% CI = -0.30, 0.0), which is suggestive of better small airway function. Higher average prenatal CO exposure was associated with higher R5 and R20, and distributed lag models identified sensitive windows of exposure between CO and X5, R5, R20, and R5-20. Conclusions: These data support the importance of prenatal HAP exposure on child lung function. Clinical trial registered with www.clinicaltrials.gov (NCT01335490).
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Affiliation(s)
- Prince Darko Agyapong
- Kintampo Health Research Centre, Research and Development, Division Ghana Health Service, Bono East Region Kintampo North, Ghana
| | - Darby Jack
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York
| | - Seyram Kaali
- Kintampo Health Research Centre, Research and Development, Division Ghana Health Service, Bono East Region Kintampo North, Ghana
| | | | - Mohammed Nuhu Mujtaba
- Kintampo Health Research Centre, Research and Development, Division Ghana Health Service, Bono East Region Kintampo North, Ghana
| | - Steven N Chillrud
- Lamont-Doherty Earth Observatory at Columbia University, Palisades, New York; and
| | - Musah Osei
- Kintampo Health Research Centre, Research and Development, Division Ghana Health Service, Bono East Region Kintampo North, Ghana
| | - Chris Gennings
- Department of Environmental Medicine and Public Health
- Institute for Exposomic Research, and
| | - Oscar Agyei
- Kintampo Health Research Centre, Research and Development, Division Ghana Health Service, Bono East Region Kintampo North, Ghana
| | - Patrick L Kinney
- Department of Environmental Health, Boston University School of Public Health, Boston, Massachusetts
| | - Adolphine Kwarteng
- Kintampo Health Research Centre, Research and Development, Division Ghana Health Service, Bono East Region Kintampo North, Ghana
| | - Matthew Perzanowski
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York
| | - Rebecca Kyerewaa Dwommoh Prah
- Kintampo Health Research Centre, Research and Development, Division Ghana Health Service, Bono East Region Kintampo North, Ghana
| | - Theresa Tawiah
- Kintampo Health Research Centre, Research and Development, Division Ghana Health Service, Bono East Region Kintampo North, Ghana
| | - Kwaku Poku Asante
- Kintampo Health Research Centre, Research and Development, Division Ghana Health Service, Bono East Region Kintampo North, Ghana
| | - Alison G Lee
- Division of Pulmonary, Critical Care and Sleep Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
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24
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Teixeira EM, Ribeiro CO, Lopes AJ, de Melo PL. Respiratory Oscillometry and Functional Performance in Different COPD Phenotypes. Int J Chron Obstruct Pulmon Dis 2024; 19:667-682. [PMID: 38464561 PMCID: PMC10924760 DOI: 10.2147/copd.s446085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 02/27/2024] [Indexed: 03/12/2024] Open
Abstract
Purpose Chronic obstructive pulmonary disease (COPD) phenotypes may introduce different characteristics that need to be known to improve treatment. Respiratory oscillometry provides a detailed analysis and may offer insight into the pathophysiology of COPD. In this paper, we used this method to evaluate the differences in respiratory mechanics of COPD phenotypes. Patients and Methods This study investigated a sample of 83 volunteers, being divided into control group (CG = 20), emphysema (n = 23), CB (n = 20) and asthma-COPD overlap syndrome (ACOS, n = 20). These analyses were performed before and after bronchodilator (BD) use. Functional capacity was evaluated using the Glittre‑ADL test, handgrip strength and respiratory pressures. Results Initially it was observed that oscillometry provided a detailed description of the COPD phenotypes, which was consistent with the involved pathophysiology. A correlation between oscillometry and functional capacity was observed (r=-0.541; p = 0.0001), particularly in the emphysema phenotype (r = -0.496, p = 0.031). BD response was different among the studied phenotypes. This resulted in an accurate discrimination of ACOS from CB [area under the receiver operating curve (AUC) = 0.84] and emphysema (AUC = 0.82). Conclusion These results offer evidence that oscillatory indices may enhance the comprehension and identification of COPD phenotypes, thereby potentially improving the support provided to these patients.
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Affiliation(s)
- Elayne Moura Teixeira
- Biomedical Instrumentation Laboratory, Institute of Biology and Faculty of Engineering, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Caroline Oliveira Ribeiro
- Biomedical Instrumentation Laboratory, Institute of Biology and Faculty of Engineering, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Agnaldo José Lopes
- Pulmonary Function Laboratory, Pedro Ernesto University Hospital, Faculty of Medical Sciences, State University of Rio de Janeiro, Rio de Janeiro, Brazil
- Pulmonary Rehabilitation Laboratory, Augusto Motta University Center, Rio de Janeiro, Brazil
| | - Pedro Lopes de Melo
- Biomedical Instrumentation Laboratory, Institute of Biology and Faculty of Engineering, State University of Rio de Janeiro, Rio de Janeiro, Brazil
- Laboratory of Clinical and Experimental Research in Vascular Biology - Biomedical Center, State University of Rio de Janeiro, Rio de Janeiro, Brazil
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25
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González JE, Rodríguez MA, Caballero E, Pardo A, Marco S, Farré R. Open-source, low-cost App-driven Internet of Things approach to facilitate respiratory oscillometry at home and in developing countries. Pulmonology 2024; 30:180-183. [PMID: 37968180 DOI: 10.1016/j.pulmoe.2023.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 10/09/2023] [Accepted: 10/09/2023] [Indexed: 11/17/2023] Open
Affiliation(s)
- J-E González
- Unit of Biophysics and Bioengineering, School of Medicine and Health Sciences, Universitat de Barcelona, Barcelona, Spain
| | - M A Rodríguez
- Unit of Biophysics and Bioengineering, School of Medicine and Health Sciences, Universitat de Barcelona, Barcelona, Spain
| | - E Caballero
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - A Pardo
- Department of Electronics and Biomedical Engineering, Universitat de Barcelona, Barcelona, Spain
| | - S Marco
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Barcelona, Spain; Department of Electronics and Biomedical Engineering, Universitat de Barcelona, Barcelona, Spain
| | - R Farré
- Unit of Biophysics and Bioengineering, School of Medicine and Health Sciences, Universitat de Barcelona, Barcelona, Spain; Institut Investigacions Biomediques August Pi Sunyer, Barcelona, Spain; CIBER de Enfermedades Respiratorias, Madrid, Spain.
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26
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Schumm B, Bremer S, Knödlseder K, Schönfelder M, Hain R, Semmler L, Lorenz E, Wackerhage H, Kähler CJ, Jörres R. Indices of airway resistance and reactance from impulse oscillometry correlate with aerosol particle emission in different age groups. Sci Rep 2024; 14:4644. [PMID: 38409397 PMCID: PMC10897442 DOI: 10.1038/s41598-024-55117-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 02/20/2024] [Indexed: 02/28/2024] Open
Abstract
Airborne transmission of pathogens plays a major role in the spread of infectious diseases. Aerosol particle production from the lung is thought to occur in the peripheral airways. In the present study we investigated eighty lung-healthy subjects of two age groups (20-39, 60-76 years) at rest and during exercise whether lung function parameters indicative of peripheral airway function were correlated with individual differences in aerosol particle emission. Lung function comprised spirometry and impulse oscillometry during quiet breathing and an expiratory vital capacity manoeuvre, using resistance (R5) and reactance at 5 Hz (X5) as indicators potentially related to peripheral airway function. The association between emission at different ventilation rates relative to maximum ventilation and lung function was assessed by regression analysis. In multiple regression analyses including age group, only vital capacity manoeuvre R5 at 15% to 50% of end-expiratory vital capacity as well as quiet breathing X5 were independently linked to particle emission at 20% to 50% of maximum ventilation, in addition to age group. The fact that age as predictive factor was still significant, although to a lower degree, points towards further effects of age, potentially involving surface properties not accounted for by impulse oscillometry parameters.
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Affiliation(s)
- Benedikt Schumm
- Department of Aerospace Engineering, Institute of Fluid Mechanics and Aerodynamics, Universität der Bundeswehr München, 85577, Neubiberg, Germany.
| | - Stephanie Bremer
- Professorship of Exercise Biology, Department of Sport and Health Sciences, Technische Universität München, 80809, Munich, Germany
| | - Katharina Knödlseder
- Professorship of Exercise Biology, Department of Sport and Health Sciences, Technische Universität München, 80809, Munich, Germany
| | - Martin Schönfelder
- Professorship of Exercise Biology, Department of Sport and Health Sciences, Technische Universität München, 80809, Munich, Germany
| | - Rainer Hain
- Department of Aerospace Engineering, Institute of Fluid Mechanics and Aerodynamics, Universität der Bundeswehr München, 85577, Neubiberg, Germany
| | - Luisa Semmler
- Department of Neurology, Klinikum Rechts der Isar, Technische Universität München, 81675, Munich, Germany
| | - Elke Lorenz
- Klinik für Herz- und Kreislauferkrankungen, Deutsches Herzzentrum München, Technische Universität München, 80636, Munich, Germany
| | - Henning Wackerhage
- Professorship of Exercise Biology, Department of Sport and Health Sciences, Technische Universität München, 80809, Munich, Germany
| | - Christian J Kähler
- Department of Aerospace Engineering, Institute of Fluid Mechanics and Aerodynamics, Universität der Bundeswehr München, 85577, Neubiberg, Germany
| | - Rudolf Jörres
- Institute and Outpatient Clinic for Occupational, Social and Environmental Medicine, LMU Hospital, Comprehensive Pneumology Center Munich (CPC-M), Member of the German Center for Lung Research (DZL), Ludwig Maximilian University of Munich, Munich, Germany
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27
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Kaminsky DA. Real-World Application of Oscillometry: Taking the LEAD. Am J Respir Crit Care Med 2024; 209:356-357. [PMID: 38190700 PMCID: PMC10878378 DOI: 10.1164/rccm.202311-2127ed] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 01/03/2024] [Indexed: 01/10/2024] Open
Affiliation(s)
- David A Kaminsky
- Pulmonary and Critical Care Medicine University of Vermont Larner College of Medicine Burlington, Vermont
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28
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Veneroni C, Valach C, Wouters EFM, Gobbi A, Dellacà RL, Breyer MK, Hartl S, Sunanta O, Irvin CG, Schiffers C, Pompilio PP, Breyer-Kohansal R. Diagnostic Potential of Oscillometry: A Population-based Approach. Am J Respir Crit Care Med 2024; 209:444-453. [PMID: 37972230 PMCID: PMC10878374 DOI: 10.1164/rccm.202306-0975oc] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 11/16/2023] [Indexed: 11/19/2023] Open
Abstract
Rationale: Respiratory resistance (Rrs) and reactance (Xrs) as measured by oscillometry and their intrabreath changes have emerged as sensitive parameters for detecting early pathological impairments during tidal breathing. Objectives: This study evaluates the prevalence and association of abnormal oscillometry parameters with respiratory symptoms and respiratory diseases in a general adult population. Methods: A total of 7,560 subjects in the Austrian LEAD (Lung, hEart, sociAl, boDy) Study with oscillometry measurements (computed with the Resmon Pro FULL; Restech Srl) were included in this study. The presence of respiratory symptoms and doctor-diagnosed respiratory diseases was assessed using an interview-based questionnaire. Rrs and Xrs at 5 Hz, their inspiratory and expiratory components, the area above the Xrs curve, and the presence of tidal expiratory flow limitation were analyzed. Normality ranges for oscillometry parameters were defined. Measurements and Main Results: The overall prevalence of abnormal oscillometry parameters was 20%. The incidence of abnormal oscillometry increased in the presence of symptoms or diagnoses: 17% (16-18%) versus 27% (25-29%), P < 0.0001. All abnormal oscillometry parameters except Rrs at 5 Hz were significantly associated with respiratory symptoms/diseases. Significant associations were found, even in subjects with normal spirometry, with abnormal oscillometry incidence rates increasing by 6% (4-8%; P < 0.0001) in subjects with symptoms or diagnoses. Conclusions: Abnormal oscillometry parameters are present in one-fifth of this adult population and are significantly associated with respiratory symptoms and disease. Our findings underscore the potential of oscillometry as a tool for detecting and evaluating respiratory impairments, even in individuals with normal spirometry.
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Affiliation(s)
- Chiara Veneroni
- Department of Electronics, Information and Bioengineering, Polytechnic University of Milan, Milan, Italy
| | - Christoph Valach
- Faculty for Medicine, Sigmund Freud University, Vienna, Austria
- Ludwig Boltzmann Institute for Lung Health, Vienna, Austria
- Department of Respiratory Medicine, Maastricht University, Maastricht, the Netherlands
| | - Emiel F. M. Wouters
- Ludwig Boltzmann Institute for Lung Health, Vienna, Austria
- Department of Respiratory Medicine, Maastricht University, Maastricht, the Netherlands
- Department of Pulmonary and Critical Care Medicine, University of Vermont, Burlington, Vermont; and
| | | | - Raffaele L. Dellacà
- Department of Electronics, Information and Bioengineering, Polytechnic University of Milan, Milan, Italy
| | - Marie-Kathrin Breyer
- Ludwig Boltzmann Institute for Lung Health, Vienna, Austria
- Department of Respiratory and Pulmonary Diseases, Clinic Penzing, Vienna Healthcare Group, Vienna, Austria
| | - Sylvia Hartl
- Faculty for Medicine, Sigmund Freud University, Vienna, Austria
- Ludwig Boltzmann Institute for Lung Health, Vienna, Austria
| | - Owat Sunanta
- Ludwig Boltzmann Institute for Lung Health, Vienna, Austria
| | - Charles G. Irvin
- Department of Pulmonary and Critical Care Medicine, University of Vermont, Burlington, Vermont; and
| | | | | | - Robab Breyer-Kohansal
- Ludwig Boltzmann Institute for Lung Health, Vienna, Austria
- Department of Respiratory and Pulmonary Diseases, Clinic Hietzing, Vienna Healthcare Group, Vienna Austria
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29
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Aitken CR, Pathangey G, Stamos M, Kim CH, Johnson BD, Stewart GM. Reproducibility and responsiveness of airway impedance measures derived from the forced oscillation technique across different operating lung volumes. Respir Physiol Neurobiol 2024; 320:104200. [PMID: 38036081 DOI: 10.1016/j.resp.2023.104200] [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: 09/26/2023] [Revised: 11/21/2023] [Accepted: 11/22/2023] [Indexed: 12/02/2023]
Abstract
BACKGROUND The forced oscillation technique (FOT) enables non-invasive measurement of respiratory system impedance. Limited data exists on how changes in operating lung volume (OLV) impact FOT-derived measures of airway resistance (Rrs) and reactance (Xrs). OBJECTIVES This study examined the reproducibility and responsiveness of FOT-derived measures of Rrs and Xrs during simulated changes in OLV. METHODS Participants simulated breathing at six OLVs: total lung capacity (TLC), ∼50% of inspiratory reserve volume (IRV50), ∼two-times tidal volume (VT2), tidal volume (VT), ∼50% of expiratory reserve volume (ERV50), and residual volume (RV), on a commercially available FOT device. Each simulated OLV manuever was performed in triplicate and in random order. Total Rrs and Xrs were recorded at 5, 11, and 19 Hz. RESULTS Twelve healthy participants (2 female) completed the study (weight: 76.5 ± 13.6 kg, height: 178.6 ± 9.7 cm, body mass index: 23.9 ± 3.1 kg/m2). Reproducibility of Rrs and Xrs at VT, VT2 and IRV50 was good to excellent (Range: ICC: 0.89-0.98, 95% confidence interval (CI): 0.70-0.98), while reproducibility at TLC, RV, and ERV50 was poor to excellent (Range: ICC: 0.60-0.98, 95% CI: 0.36-0.97). Rrs and Xrs were not different between VT and VT2 at any frequency (P > .05). With lung hyperinflation from VT to TLC, Rrs and Xrs decreased at all three frequencies (e.g., At 5 Hz Rrs: mean difference (MD): - 0.89, 95%CI: - 0.03 to - 1.75, P = .04; Xrs: MD: - 0.56, 95%CI: - 0.25 to - 0.86, P < .01). With lung hypoinflated from VT to RV, Rrs increased, and Xrs decreased for all frequencies (e.g., MD at 5 Hz, Rrs: MD: 2.31, 95%CI: 0.94-3.67, P < .01; Xrs: MD: -2.53, 95%CI: -4.02 to -1.04, P < .01). CONCLUSION FOT-derived measures of airway Rrs and Xrs are reproducible across a range of OLV's, and are responsive to hyper- and hypo-inflation of the lung. To further understand the impact of lung hyper- and hypo-inflation on FOT-derived airway impedance additional study is required in individuals with pathological variations in operating lung volume.
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Affiliation(s)
- Craig R Aitken
- Menzies Health Institute Queensland, Griffith University, Gold Coast, QLD, Australia
| | | | - Mathew Stamos
- Depatment of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA
| | - Chul-Ho Kim
- Depatment of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA
| | - Bruce D Johnson
- Depatment of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA
| | - Glenn M Stewart
- Depatment of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA; Charles Perkins Centre and School of Medicine, Faculty of Medicine and Health, University of Sydney, Camberdown, NSW, Australia.
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Barreto M, Veneroni C, Caiulo M, Evangelisti M, Pompilio PP, Mazzuca MC, Raponi G, Pagani J, Parisi P. Within-breath oscillometry for identifying exercise-induced bronchoconstriction in pediatric patients reporting symptoms with exercise. Front Pediatr 2024; 11:1324413. [PMID: 38274467 PMCID: PMC10808442 DOI: 10.3389/fped.2023.1324413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 12/27/2023] [Indexed: 01/27/2024] Open
Abstract
Background Evaluating oscillometry parameters separately for the inspiratory and expiratory breath phases and their within-breath differences can help to identify exercise-induced bronchoconstriction (EIB) in pediatric outpatients disclosing exercise-induced symptoms (EIS). Aims To assess the response in impedance parameters following an exercise challenge in patients reporting EIS. Methods Sixty-eight patients reporting EIS (34 asthmatics and 34 suspected of asthma, age mean = 10.8 years, range = 6.0-16.0) underwent an incremental treadmill exercise test. Spirometry was performed at baseline and 1, 5-, 10-, 15-, and 20-min post exercise. Oscillometry was performed at baseline and at 3- and 18-min post exercise. Bronchodilator response to 200 µg albuterol was then assessed. EIB was defined as a forced expiratory volume in 1 s (FEV1) fall ≥10% from baseline. Expiratory and inspiratory resistance (Rrs) and reactance (Xrs), their z-score (Ducharme et al. 2022), and their mean within-breath differences (ΔRrs = Rrsexp-Rrsinsp, ΔXrs = Xrsexp-Xrsinsp) were calculated. Receiver operating characteristic (ROC) curves and their areas (AUCs) were used to evaluate impedance parameters' performances in classifying EIB. Results Asthmatic patients developed EIB more frequently than those suspected of asthma [18/34 (52.9%) vs. 2/34 (5.9%), p < 0.001]. In the 20 subjects with EIB, Rrsinsp, Rrsexp, Xrsinsp, and Xrsexp peaked early (3'), and remained steady except for Xrsinsp, which recovered faster afterward. ΔXrs widened 18 min following the exercise and reversed sharply after bronchodilation (BD) (-1.81 ± 1.60 vs. -0.52 ± 0.80 cmH2O × s/L, p < 0.001). Cutoffs for EIB leading to the highest AUCs were a rise of 0.41 in z-score Rrsinsp (Se: 90.0%, Sp: 66.7%), and a fall of -0.64 in z-score Xrsinsp (Se: 90.0%, Sp: 75.0%). Accepting as having "positive" postexercise oscillometry changes those subjects who had both z-scores beyond respective cutoffs, sensitivity for EIB was 90.0% (18/20) and specificity, 83.3% (40/48). Conclusion Oscillometry parameters and their within-breath differences changed markedly in pediatric patients presenting EIB and were restored after the bronchodilator. Strong agreement between z-scores of inspiratory oscillometry parameters and spirometry supports their clinical utility, though larger studies are required to validate these findings in a broader population.
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Affiliation(s)
- Mario Barreto
- NESMOS Department, Pediatric Unit Sant’Andrea Hospital, Faculty of Medicine and Psychology, “Sapienza” University, Rome, Italy
| | - Chiara Veneroni
- Department of Electronics, Information and Bioengineering, Politecnico di Milano University, Milano, Italy
| | - Mariaclaudia Caiulo
- NESMOS Department, Pediatric Unit Sant’Andrea Hospital, Faculty of Medicine and Psychology, “Sapienza” University, Rome, Italy
| | - Melania Evangelisti
- NESMOS Department, Pediatric Unit Sant’Andrea Hospital, Faculty of Medicine and Psychology, “Sapienza” University, Rome, Italy
| | | | - Maria Cristina Mazzuca
- NESMOS Department, Pediatric Unit Sant’Andrea Hospital, Faculty of Medicine and Psychology, “Sapienza” University, Rome, Italy
| | - Giorgia Raponi
- NESMOS Department, Pediatric Unit Sant’Andrea Hospital, Faculty of Medicine and Psychology, “Sapienza” University, Rome, Italy
| | - Jacopo Pagani
- NESMOS Department, Pediatric Unit Sant’Andrea Hospital, Faculty of Medicine and Psychology, “Sapienza” University, Rome, Italy
| | - Pasquale Parisi
- NESMOS Department, Pediatric Unit Sant’Andrea Hospital, Faculty of Medicine and Psychology, “Sapienza” University, Rome, Italy
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31
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Matesanz-López C, Raboso-Moreno B, Saldaña-Pérez LE, Rodríguez-Nieto MJ, Río-Ramírez MT. Is Lung Function Measured by Oscillometry Useful in Interstitial Lung Diseases? OPEN RESPIRATORY ARCHIVES 2024; 6:100278. [PMID: 38022789 PMCID: PMC10658389 DOI: 10.1016/j.opresp.2023.100278] [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: 07/20/2023] [Accepted: 09/19/2023] [Indexed: 12/01/2023] Open
Abstract
Introduction The role of oscillometry in interstitial lung disease (ILD) is still unclear. The main objective of our study was to describe the parameters determined by oscillometry in these patients and compare them with those obtained in conventional respiratory function tests. Methods This was a cross-sectional observational study. Patients with no respiratory disease and patients being followed up for ILD in the specialist unit of Hospital Universitario de Getafe, Madrid were included. Results A total of 45 individuals were analyzed. Fifteen had no respiratory disease, 15 were ILD patients with mild functional impairment, and another 15 were ILD patients with severe impairment. None of the participants had an obstructive pattern on spirometry.Comparison between the three groups showed statistically significant differences in the values of R5-19, reactance at 5 Hz and reactance at 11 Hz. No differences were observed between the three groups in Delta Xrs. The study showed a strong correlation between total and inspiratory reactance at 5 Hz and forced vital capacity and diffusing capacity for carbon monoxide. Conclusions Our results suggest that the findings in ILD are characteristic of this disease and that they differ from those found in other diseases such as chronic obstructive pulmonary disease. It also seems that there are differences according to the degree of functional impairment of the patients. The results show a strong correlation with standard pulmonary function tests, so oscillometry could be a useful tool in patients with ILD who are unable to perform it, and could provide additional information.
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Affiliation(s)
| | | | | | - María Jesús Rodríguez-Nieto
- Pulmonology Department, Fundación Jiménez Díaz, Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
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32
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Savushkina OI, Astanin PA, Nekludova GV, Avdeev SN, Zaytsev AA. [The possibilities of impulse oscillometry in the diagnosis of the lung function disorders after COVID-19]. TERAPEVT ARKH 2023; 95:924-929. [PMID: 38158947 DOI: 10.26442/00403660.2023.11.202474] [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: 11/23/2023] [Accepted: 11/23/2023] [Indexed: 01/03/2024]
Abstract
BACKGROUND Impulse oscillometry (IOS) is an effort independent method of studying lung mechanics. AIM To study the diagnostic significance of IOS in assessing lung mechanics after COVID-19. MATERIALS AND METHODS Spirometry, body plethysmography, diffusion test (DLco), IOS parameters were analyzed in 315 patients (the median age 48 years), the median period from the beginning of COVID-19 to the study was 50 days. Statistical analysis included descriptive statistics, correlation analysis and one-dimensional logistic regression analysis with an assessment of odds ratios. RESULTS In general group, spirometry and body plethysmography parameters were in normal values, while DLCO was reduced in 61% of patients. Parameters of IOS were analyzed in the general group and between the groups, depending on the value of DLco and total lung capacity (TLC): normal or reduced. In general group, reactance area (AX), hererogeneity of resistance Rrs5-Rrs20, resistance at 5 Hz (Rrs5), reactance at 5 Hz (ΔXrs5) were increased in 29.8%, 17.8%, 6%, 4.8% of patients, respectively, and were statistically significantly higher in the group with reduced TLC, whereas in the group with reduced DLco AX, Rrs5-Rrs20 were statistically significantly higher. Logistic regression analysis showed that patients with Rrs5-Rrs20>0.07 kPa×sec/l or AX>0.32 kPa/l had a 1.99-fold and 2.24-fold increased risk for decrease DLco, respectively, while the risk of decrease in TLC was 2.25-fold (p=0.012) and 3.16-fold (p<0.001) higher, respectively. CONCLUSION IOS allow to detect both dysfunction of small airways (if AX or Rrs5-Rrs20 are increased) and the risk of restrictive pattern and lung diffusion impairment after COVID-19.
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Affiliation(s)
- O I Savushkina
- Burdenko Main Military Clinical Hospital
- Federal Pulmonology Research Institute
| | - P A Astanin
- Pirogov Russian National Research Medical University
- Izmerov Research Institute of Occupational Health
| | - G V Nekludova
- Federal Pulmonology Research Institute
- Sechenov First Moscow State Medical University (Sechenov University)
| | - S N Avdeev
- Federal Pulmonology Research Institute
- Sechenov First Moscow State Medical University (Sechenov University)
| | - A A Zaytsev
- Burdenko Main Military Clinical Hospital
- BIOTECH University
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Sim JPY, Nilsen K, Borg BM, Levvey B, Vazirani J, Ennis S, Plit M, Snell GI, Darley DR, Tonga KO. Oscillometry in Stable Single and Double Lung Allograft Recipients Transplanted for Interstitial Lung Disease: Results of a Multi-Center Australian Study. Transpl Int 2023; 36:11758. [PMID: 38116170 PMCID: PMC10728296 DOI: 10.3389/ti.2023.11758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 11/14/2023] [Indexed: 12/21/2023]
Abstract
Peak spirometry after single lung transplantation (SLTx) for interstitial lung disease (ILD) is lower than after double lung transplantation (DLTx), however the pathophysiologic mechanisms are unclear. We aim to assess respiratory mechanics in SLTx and DLTx for ILD using oscillometry. Spirometry and oscillometry (tremoflo® C-100) were performed in stable SLTx and DLTx recipients in a multi-center study. Resistance (R5, R5-19) and reactance (X5) were compared between LTx recipient groups, matched by age and gender. A model of respiratory impedance using ILD and DLTx data was performed. In total, 45 stable LTx recipients were recruited (SLTx n = 23, DLTx n = 22; males: 87.0% vs. 77.3%; median age 63.0 vs. 63.0 years). Spirometry was significantly lower after SLTx compared with DLTx: %-predicted mean (SD) FEV1 [70.0 (14.5) vs. 93.5 (26.0)%]; FVC [70.5 (16.8) vs. 90.7 (12.8)%], p < 0.01. R5 and R5-19 were similar between groups (p = 0.94 and p = 0.11, respectively) yet X5 was significantly worse after SLTx: median (IQR) X5 [-1.88 (-2.89 to -1.39) vs. -1.22 (-1.87 to -0.86)] cmH2O.s/L], p < 0.01. R5 and X5 measurements from the model were congruent with measurements in SLTx recipients. The similarities in resistance, yet differences in spirometry and reactance between both transplant groups suggest the important contribution of elastic properties to the pathophysiology. Oscillometry may provide further insight into the physiological changes occurring post-LTx.
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Affiliation(s)
- Joan P. Y. Sim
- Lung Transplant and Thoracic Medicine Unit, St Vincent’s Hospital, Sydney, NSW, Australia
- St Vincent’s Hospital Clinical Campus, Faculty of Medicine and Health, The University of New South Wales, Sydney, NSW, Australia
| | - Kristopher Nilsen
- Lung Transplant and Respiratory Medicine Service, The Alfred Hospital, Melbourne, VIC, Australia
| | - Brigitte M. Borg
- Lung Transplant and Respiratory Medicine Service, The Alfred Hospital, Melbourne, VIC, Australia
- School of Public Health and Preventive Medicine, Monash University, Melbourne, VIC, Australia
| | - Bronwyn Levvey
- Lung Transplant and Respiratory Medicine Service, The Alfred Hospital, Melbourne, VIC, Australia
- Faculty of Medicine, Nursing and Health Science, Monash University, Melbourne, VIC, Australia
| | - Jaideep Vazirani
- Lung Transplant and Respiratory Medicine Service, The Alfred Hospital, Melbourne, VIC, Australia
| | - Samantha Ennis
- Lung Transplant and Respiratory Medicine Service, The Alfred Hospital, Melbourne, VIC, Australia
| | - Marshall Plit
- Lung Transplant and Thoracic Medicine Unit, St Vincent’s Hospital, Sydney, NSW, Australia
- St Vincent’s Hospital Clinical Campus, Faculty of Medicine and Health, The University of New South Wales, Sydney, NSW, Australia
| | - Gregory I. Snell
- Lung Transplant and Respiratory Medicine Service, The Alfred Hospital, Melbourne, VIC, Australia
- Faculty of Medicine, Nursing and Health Science, Monash University, Melbourne, VIC, Australia
| | - David R. Darley
- Lung Transplant and Thoracic Medicine Unit, St Vincent’s Hospital, Sydney, NSW, Australia
- St Vincent’s Hospital Clinical Campus, Faculty of Medicine and Health, The University of New South Wales, Sydney, NSW, Australia
| | - Katrina O. Tonga
- Lung Transplant and Thoracic Medicine Unit, St Vincent’s Hospital, Sydney, NSW, Australia
- St Vincent’s Hospital Clinical Campus, Faculty of Medicine and Health, The University of New South Wales, Sydney, NSW, Australia
- Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
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De Luca D, Loi B, Tingay D, Fiori H, Kingma P, Dellacà R, Autilio C. Surfactant status assessment and personalized therapy for surfactant deficiency or dysfunction. Semin Fetal Neonatal Med 2023; 28:101494. [PMID: 38016825 DOI: 10.1016/j.siny.2023.101494] [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: 11/30/2023]
Abstract
Surfactant is a pivotal neonatal drug used both for respiratory distress syndrome due to surfactant deficiency and for more complex surfactant dysfunctions (such as in case of neonatal acute respiratory distress syndrome). Despite its importance, indications for surfactant therapy are often based on oversimplified criteria. Lung biology and modern monitoring provide several diagnostic tools to assess the patient surfactant status and they can be used for a personalized surfactant therapy. This is desirable to improve the efficacy of surfactant treatment and reduce associated costs and side effects. In this review we will discuss these diagnostic tools from a pathophysiological and multi-disciplinary perspective, focusing on the quantitative or qualitative surfactant assays, lung mechanics or aeration measurements, and gas exchange metrics. Their biological and technical characteristics are described with practical information for clinicians. Finally, available evidence-based data are reviewed, and the diagnostic accuracy of the different tools is compared. Lung ultrasound seems the most suitable tool for assessing the surfactant status, while some other promising tests require further research and/or development.
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Affiliation(s)
- Daniele De Luca
- Division of Pediatrics and Neonatal Critical Care, "Antoine Béclère" Hospital, Paris Saclay University Hospitals, APHP, Paris, France; Physiopathology and Therapeutic Innovation Unit, INSERM U999, Paris Saclay University, Paris, France; Department of Pediatrics, Division of Neonatology, Stanford University, School of Medicine - Lucile Packard Children's Hospital, Palo Alto, CA, USA.
| | - Barbara Loi
- Division of Pediatrics and Neonatal Critical Care, "Antoine Béclère" Hospital, Paris Saclay University Hospitals, APHP, Paris, France; Physiopathology and Therapeutic Innovation Unit, INSERM U999, Paris Saclay University, Paris, France
| | - David Tingay
- Neonatal Research Unit, Murdoch Children's Research Institute, Parkville, Australia; Department of Pediatrics, University of Melbourne, Melbourne, Australia
| | - Humberto Fiori
- Division of Neonatology, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Paul Kingma
- Perinatal Institute, Cincinnati Children's University Hospital Medical Center, Cincinnati, OH, USA
| | - Raffaele Dellacà
- Department of Electronics, Information and Bio-engineering, Polytechnical University of Milan, Milan, Italy
| | - Chiara Autilio
- Department of Biochemistry and Molecular Biology and Research Institute Hospital October 12 (imas12), Faculty of Biology, Complutense University, Madrid, Spain; Clinical Pathology and Microbiology Unit, San Carlo Hospital, Potenza, Italy
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Sousa C, Pessoa A, Carelli L, Ribeiro C, Lopes A, Melo P. Respiratory oscillometry and functional analyses in patients with idiopathic scoliosis. Braz J Med Biol Res 2023; 56:e12898. [PMID: 37937601 PMCID: PMC10695157 DOI: 10.1590/1414-431x2023e12898] [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: 07/06/2023] [Accepted: 09/06/2023] [Indexed: 11/09/2023] Open
Abstract
Scoliosis is a condition that affects the spine and causes chest rotation and trunk distortion. Individuals with severe deformities may experience dyspnea on exertion and develop respiratory failure. Respiratory oscillometry is a simple and non-invasive method that provides detailed information on lung mechanics. This work aims to investigate the potential of oscillometry in the evaluation of respiratory mechanics in patients with scoliosis and its association with physical performance. We analyzed 32 volunteers in the control group and 32 in the scoliosis group. The volunteers underwent traditional pulmonary function tests, oscillometry, and the 6-minute walk test (6MWT). Oscillometric analysis showed increased values of resistance at 4 Hz (R4, P<0.01), 12 Hz (R12, P<0.0001), and 20 Hz (R20, P<0.01). Similar analysis showed reductions in dynamic compliance (Cdyn, P<0.001) and ventilation homogeneity, as evaluated by resonance frequency (fr, P<0.001) and reactance area (Ax, P<0.001). Respiratory work, described by the impedance modulus, also showed increased values (Z4, P<0.01). Functional capacity was reduced in the group with scoliosis (P<0.001). A significant direct correlation was found between Cobb angle and R12, AX, and Z4 (P=0.0237, P=0.0338, and P=0.0147, respectively), and an inverse correlation was found between Cdyn and Cobb angle (P=0.0190). These results provided new information on respiratory mechanics in scoliosis and are consistent with the involved pathophysiology, suggesting that oscillometry may improve lung function tests for patients with scoliosis.
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Affiliation(s)
- C.M.S. Sousa
- Laboratório de Instrumentação Biomédica, Instituto de Biologia, Faculdade de Engenharia, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - A.L.C. Pessoa
- Hospital Universitário Pedro Ernesto, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - L.E. Carelli
- Instituto Nacional de Traumatoortopedia, Rio de Janeiro, RJ, Brasil
| | - C.O. Ribeiro
- Laboratório de Instrumentação Biomédica, Instituto de Biologia, Faculdade de Engenharia, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - A.J. Lopes
- Laboratório de Função Pulmonar, Hospital Universitário Pedro Ernesto, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - P.L. Melo
- Laboratório de Instrumentação Biomédica, Instituto de Biologia, Faculdade de Engenharia, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
- Laboratório de Pesquisa Clínica e Experimental em Biologia Vascular, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
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Cerfeuillet V, Allimonnier L, Le Guellec S, Ménard L, Bokov P, Plantier L. Association of forced oscillation technique measurements with respiratory system compliance and resistance in a 2-compartment physical model. Respir Med Res 2023; 84:101027. [PMID: 37717385 DOI: 10.1016/j.resmer.2023.101027] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 05/11/2023] [Accepted: 05/11/2023] [Indexed: 09/19/2023]
Abstract
BACKGROUND The forced oscillation technique (FOT) may be useful for diagnosis and follow-up of respiratory diseases. It is unclear how global or regional alterations in airway resistance (Raw) and lung compliance (CL) alter FOT measurements. METHODS A 2-compartment physical model of the respiratory system allowed to simulate variations in Raw, CL, and their heterogeneity during tidal breathing in an adult human. Five-Hz respiratory system resistance (Rrs5) and reactance (Xrs5), area of reactance (AX), resonance frequency (Fresp) and intrabreath variation in Rrs5 and Xrs5 were measured by FOT. Frequency dependance of resistance could not be studied in this model. Relationships between model characteristics (Raw, CL, and heterogeneity) and FOT measurements were explored by multiple regression. RESULTS Rrs5 and intrabreath variation in Rrs5 and Xrs5 strongly associated with model characteristics (R2=0.753, 0.5 and 0.658). Associations of Xrs5, AX, and Fresp with model characteristics were weak (R2=0.214, 0.349 and 0.076). Raw heterogeneity was the main determinant of Rrs5 (Coeff=0.594), AX (Coeff=0.566) and intrabreath variation in Rrs5 and Xrs5 (Coeff=0.586 and 0.732). Regional extremes in Raw strongly determined Rrs5 (Coeff=1.006). Xrs5 did not strongly associate with any model characteristic. CONCLUSION Raw heterogeneity and maximal regional Raw were the main determinants of FOT measurements, in particular Rrs5. Associations between CL and FOT measurements were weak.
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Affiliation(s)
- Valentin Cerfeuillet
- Centre d'étude des pathologies respiratoires / Inserm UMR1100, Université de Tours, Tours, France
| | - Laurine Allimonnier
- Centre d'étude des pathologies respiratoires / Inserm UMR1100, Université de Tours, Tours, France
| | - Sandrine Le Guellec
- Centre d'étude des pathologies respiratoires / Inserm UMR1100, Université de Tours, Tours, France
| | - Luke Ménard
- Centre d'étude des pathologies respiratoires / Inserm UMR1100, Université de Tours, Tours, France
| | - Plamen Bokov
- AP-HP, Hôpital Robert Debré, Service de Physiologie Pédiatrique -Centre du Sommeil - CRMR Hypoventilations alvéolaires rares, Paris, France; Université de Paris Cité, NSERM NeuroDiderot, F-75019, Paris, France
| | - Laurent Plantier
- Centre d'étude des pathologies respiratoires / Inserm UMR1100, Université de Tours, Tours, France; Service de Pneumologie et Explorations Fonctionnelles Respiratoires, CHRU de Tours, Tours, France.
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Smith EF, Bradshaw TK, Urs RC, Evans DJ, Hemy NR, Hall GL, Wilson AC, Simpson SJ. Oscillometry and spirometry are not interchangeable when assessing the bronchodilator response in children and young adults born preterm. Pediatr Pulmonol 2023; 58:3122-3132. [PMID: 37539845 PMCID: PMC10947568 DOI: 10.1002/ppul.26632] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 07/20/2023] [Accepted: 07/24/2023] [Indexed: 08/05/2023]
Abstract
INTRODUCTION The European Respiratory Society Oscillometry Taskforce identified that clinical correlates of bronchodilator responses are needed to advance oscillometry in clinical practice. The understanding of bronchodilator-induced oscillometry changes in preterm lung disease is poor. Here we describe a comparison of bronchodilator assessments performed using oscillometry and spirometry in a population born very preterm and explore the relationship between bronchodilator-induced changes in respiratory function and clinical outcomes. METHODS Participants aged 6-23 born ≤32 (N = 288; 132 with bronchopulmonary dysplasia) and ≥37 weeks' gestation (N = 76, term-born controls) performed spirometry and oscillometry. A significant bronchodilator response (BDR) to 400 μg salbutamol was classified according to published criteria. RESULTS A BDR was identified in 30.9% (n = 85) of preterm-born individuals via spirometry and/or oscillometry, with poor agreement between spirometry and oscillometry definitions (k = 0.26; 95% confidence interval [CI] 0.18-0.40, p < .001). Those born preterm with a BDR by oscillometry but not spirometry had increased wheeze (33% vs. 11%, p = .010) and baseline resistance (Rrs5 z-score mean difference (MD) = 0.86, 95% CI 0.07-1.65, p = .025), but similar baseline spirometry to the group without a BDR (forced expiratory volume in 1 s [FEV1 ] z-score MD = -0.01, 95% CI -0.66 to 0.68, p > .999). Oscillometry was more feasible than spirometry (95% success rate vs. 85% (FEV1 ), 69% (forced vital capacity) success rate, p < .001), however being born preterm did not affect test feasibility. CONCLUSION In the preterm population, oscillometry is a feasible and clinically useful supportive test to assess the airway response to inhaled salbutamol. Changes measured by oscillometry reflect related but distinct physiological changes to those measured by spirometry, and thus these tests should not be used interchangeably.
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Affiliation(s)
- Elizabeth F. Smith
- Wal‐Yan Respiratory Research Centre, Telethon Kids InstitutePerth Children's HospitalNedlandsAustralia
- Curtin School of Allied HealthFaculty of Health SciencesBentleyAustralia
| | - Tiffany K. Bradshaw
- Wal‐Yan Respiratory Research Centre, Telethon Kids InstitutePerth Children's HospitalNedlandsAustralia
| | - Rhea C. Urs
- Wal‐Yan Respiratory Research Centre, Telethon Kids InstitutePerth Children's HospitalNedlandsAustralia
- Curtin School of Allied HealthFaculty of Health SciencesBentleyAustralia
| | - Denby J. Evans
- Wal‐Yan Respiratory Research Centre, Telethon Kids InstitutePerth Children's HospitalNedlandsAustralia
- Curtin School of Allied HealthFaculty of Health SciencesBentleyAustralia
| | - Naomi R. Hemy
- Wal‐Yan Respiratory Research Centre, Telethon Kids InstitutePerth Children's HospitalNedlandsAustralia
| | - Graham L. Hall
- Wal‐Yan Respiratory Research Centre, Telethon Kids InstitutePerth Children's HospitalNedlandsAustralia
- Curtin School of Allied HealthFaculty of Health SciencesBentleyAustralia
| | - Andrew C. Wilson
- Wal‐Yan Respiratory Research Centre, Telethon Kids InstitutePerth Children's HospitalNedlandsAustralia
- Curtin School of Allied HealthFaculty of Health SciencesBentleyAustralia
- Child and Adolescent Health ServicePerth Children's HospitalNedlandsAustralia
| | - Shannon J. Simpson
- Wal‐Yan Respiratory Research Centre, Telethon Kids InstitutePerth Children's HospitalNedlandsAustralia
- Curtin School of Allied HealthFaculty of Health SciencesBentleyAustralia
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Fouzas S, Kogias C, Gioulvanidou M, Bertzouanis A, Chrysochoou EA, Anthracopoulos MΒ, Tsanakas J, Hatziagorou E. Low-frequency oscillometry indices to assess ventilation inhomogeneity in CF patients. Pediatr Pulmonol 2023; 58:3147-3155. [PMID: 37555768 DOI: 10.1002/ppul.26635] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 07/21/2023] [Accepted: 07/29/2023] [Indexed: 08/10/2023]
Abstract
BACKGROUND The utility of the forced oscillations technique (FOT) in cystic fibrosis (CF) remains uncertain. The aim of this study was to explore the ability of lower-frequency FOT indices, alone and after adjustment for the lung volume, to assess the extent of ventilation inhomogeneity in CF patients with varying disease severity. METHODS Forty-five children, adolescents, and adults with CF (age 6.9-27 years) underwent spirometry, FOT, and nitrogen multiple-breath washout (N2-MBW) measurements. The respiratory resistance and reactance at 5 Hz (Rrs5 and Xrs5, respectively) were recorded, and a novel FOT index, the specific respiratory conductance (sGrs), was computed as the reciprocal of Rrs5 divided by the functional residual capacity. RESULTS The sGrs correlated well with the lung clearance index (LCI) (Spearman's r: -.797), whereas the correlation of Rrs5 and Xrs5 with the LCI, albeit significant, was weaker (r: .643 and -.631, respectively). The sGrs emerged as the most robust predictor of LCI regardless of the severity of lung disease, as reflected by patients' age and lung function measurements. Most importantly, the relationship between sGrs and LCI remained unaffected by lung hyperinflation, as opposed to that of the LCI with the spirometric and standard FOT indices. CONCLUSIONS In CF patients, the FOT indices at 5 Hz and the novel, volume-adjusted parameter sGrs, reflect the extent of lung involvement and the underlying ventilation inhomogeneity in a way comparable to N2-MBW. Future research should explore the role of lower-frequency FOT in assessing the severity and monitoring the progression of CF lung disease.
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Affiliation(s)
- Sotirios Fouzas
- Pediatric Respiratory Unit, Pediatric Department, University Hospital of Patras, Patras, Greece
| | - Christos Kogias
- Pediatric Respiratory and Cystic Fibrosis Unit, 3rd Paediatric Department, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Maria Gioulvanidou
- Pediatric Respiratory and Cystic Fibrosis Unit, 3rd Paediatric Department, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Aris Bertzouanis
- Pediatric Respiratory Unit, Pediatric Department, University Hospital of Patras, Patras, Greece
| | - Elisavet-Anna Chrysochoou
- Pediatric Respiratory and Cystic Fibrosis Unit, 3rd Paediatric Department, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | | | - John Tsanakas
- Pediatric Respiratory and Cystic Fibrosis Unit, 3rd Paediatric Department, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Elpis Hatziagorou
- Pediatric Respiratory and Cystic Fibrosis Unit, 3rd Paediatric Department, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Gochicoa-Rangel L, Martínez-Briseño D, Guerrero-Zúñiga S, Contreras-Morales J, Arias-Jiménez D, Del-Río-Hidalgo R, Hernández-Rocha FI, Ceballos-Zúñiga CO, Silva-Cerón M, Mora-Romero UDJ, Torre-Bouscoulet L, Fernández-Plata R, Pérez-Nieto JE, Vargas MH. Reference equations using segmented regressions for impulse oscillometry in healthy subjects aged 2.7-90 years. ERJ Open Res 2023; 9:00503-2023. [PMID: 38111542 PMCID: PMC10726221 DOI: 10.1183/23120541.00503-2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 09/30/2023] [Indexed: 12/20/2023] Open
Abstract
Background Published reference equations for impulse oscillometry (IOS) usually encompass a specific age group but not the entire lifespan. This may lead to discordant predicted values when two or more non-coincident equations can be applied to the same person, or when a person moves from one equation to the next non-convergent equation as he or she gets older. Thus, our aim was to provide a single reference equation for each IOS variable that could be applied from infancy to old age. Methods This was an ambispective cross-sectional study in healthy nonsmokers, most of whom lived in Mexico City, who underwent IOS according to international standards. A multivariate piecewise linear regression, also known as segmented regression, was used to obtain reference equations for each IOS variable. Results In a population of 830 subjects (54.0% female) aged 2.7 to 90 years (54.8% children ≤12 years), segmented regression estimated two breakpoints for age in almost all IOS variables, except for R5-R20 in which only one breakpoint was detected. With this approach, multivariate regressions including sex, age, height and body mass index as independent variables were constructed, and coefficients for calculating predicted value, lower and upper limits of normal, percentage of predicted and z-score were obtained. Conclusions Our study provides IOS reference equations that include the major determinants of lung function, i.e. sex, age, height and body mass index, that can be easily implemented for subjects of almost any age.
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Affiliation(s)
- Laura Gochicoa-Rangel
- Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas, Mexico City, Mexico
- Pulmonary Function Test Laboratory, Institute for Development and Innovation in Respiratory Physiology (INFIRE), Mexico City, Mexico
- These authors contributed equally
| | - David Martínez-Briseño
- Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas, Mexico City, Mexico
- These authors contributed equally
| | - Selene Guerrero-Zúñiga
- Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas, Mexico City, Mexico
| | | | - Dulce Arias-Jiménez
- Hospital General de Zona 1, Instituto Mexicano del Seguro Social, Pachuca, Mexico
| | | | | | | | - Mónica Silva-Cerón
- Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas, Mexico City, Mexico
| | | | - Luis Torre-Bouscoulet
- Pulmonary Function Test Laboratory, Institute for Development and Innovation in Respiratory Physiology (INFIRE), Mexico City, Mexico
| | | | | | - Mario H. Vargas
- Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas, Mexico City, Mexico
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Cottini M, Bondi B, Bagnasco D, Braido F, Passalacqua G, Licini A, Lombardi C, Berti A, Comberiati P, Landi M, Heffler E, Paoletti G. Impulse oscillometry defined small airway dysfunction in asthmatic patients with normal spirometry: Prevalence, clinical associations, and impact on asthma control. Respir Med 2023; 218:107391. [PMID: 37595673 DOI: 10.1016/j.rmed.2023.107391] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 08/07/2023] [Accepted: 08/14/2023] [Indexed: 08/20/2023]
Abstract
BACKGROUND The small-airway dysfunction (SAD), detected with impulse oscillometry (IOS) methods, has been recently better characterized in patients with asthma. However, little is known about SAD in asthmatic patients with normal spirometry (NS). OBJECTIVE In this study, we aimed to investigate, in an unselected sample of 321 patients with physician-diagnosed asthma and NS, prevalence, clinical characterization, and impact on asthma control of IOS-defined SAD. As a secondary objective of the study, we focused on comparing the difference between IOS- and spirometry-defined SAD. METHODS Consecutive patients with a previous diagnosis of asthma but normal spirometry at the moment of the enrollment were stratified by the presence of IOS-defined SAD (difference in resistance at 5 Hz and at 20 Hz [R5-R20] greater than 0.07 kPa x s x L-1). We have also assessed the presence of SAD defined by spirometry, according to FEF 25-75 < 65% of the predicted. Clinical and laboratory features were collected, and univariable and multivariable analyses were used to analyze cross-sectional associations between clinical variables and outcomes (SAD). RESULTS IOS-defined SAD was present in 54.1% of the cohort. In contrast, spirometry-defined SAD was present in only 10% of patients. Subjects with IOS-defined SAD showed less well-controlled asthma and a higher mean inhaled corticosteroid dosage use compared with subjects without SAD (both P < .001). Overweight (odds ratio [OR], 1.14; 95% CI, 1.05-1.23), exacerbation history (OR, 3.06; 95% CI, 1.34-6.97), asthma-related night awakenings (OR, 6.88; 95% CI, 2.13-22.23), exercise-induced asthma symptoms (OR, 33.5; 95% CI, 9.51-117.8), and controlled asthma (OR, 0.22; 95% CI, 0.06-0.84) were independently associated with SAD. CONCLUSIONS Asthmatic patients with IOS-defined SAD showed less well-controlled asthma, more severe exacerbations and higher mean inhaled corticosteroid dosage. We confirmed exercise-induced asthma, asthma-related night awakenings, exacerbation history, and overweight as independently associated with SAD, while showing well-controlled asthma as inversely associated. SAD may be overlooked by standard spirometry.
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Affiliation(s)
| | - Benedetta Bondi
- Allergy and Respiratory Diseases, IRCCS Policlinico San Martino, University of Genoa, Genova, Italy.
| | - Diego Bagnasco
- Allergy and Respiratory Diseases, IRCCS Policlinico San Martino, University of Genoa, Genova, Italy
| | - Fulvio Braido
- Allergy and Respiratory Diseases, IRCCS Policlinico San Martino, University of Genoa, Genova, Italy
| | - Giovanni Passalacqua
- Allergy and Respiratory Diseases, IRCCS Policlinico San Martino, University of Genoa, Genova, Italy
| | - Anita Licini
- Allergy and Pneumology Outpatient Clinic, Bergamo, Italy
| | - Carlo Lombardi
- Departmental Unit of Allergology, Immunology & Pulmonary Diseases, Fondazione Poliambulanza, Brescia, Italy
| | - Alvise Berti
- Center for Medical Sciences (CISMed) and Department of Cellular, Computational and Integrative Biology (CIBIO), University of Trento, Italy, and Santa Chiara Regional Hospital, APSS, Trento, Italy
| | - Pasquale Comberiati
- Department of Clinical and Experimental Medicine, Section of Pediatrics, University of Pisa, Pisa, Italy
| | - Massimo Landi
- Dipartimento di Scienze Mediche, SSDDU Allergologia e Immunologia Clinica, Università degli Studi di Torino, AO Ordine Mauriziano Umberto I, Torino, Italy
| | - Enrico Heffler
- Department of Biomedical Sciences, Humanitas University, Milan, Italy; Personalized Medicine, Asthma and Allergy - IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy
| | - Giovanni Paoletti
- Department of Biomedical Sciences, Humanitas University, Milan, Italy; Personalized Medicine, Asthma and Allergy - IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy
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Caldas BT, Ribeiro FCV, Pereira JS, Souza WC, Lopes AJ, de Melo PL. Oscillometry of the respiratory system in Parkinson's disease: physiological changes and diagnostic use. BMC Pulm Med 2023; 23:406. [PMID: 37884922 PMCID: PMC10605979 DOI: 10.1186/s12890-023-02716-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 10/16/2023] [Indexed: 10/28/2023] Open
Abstract
BACKGROUND Lung function analysis in Parkinson's disease (PD) is often difficult due to the demand for adequate forced expiratory maneuvers. Respiratory oscillometry exams require onlyquiet tidal breathing and provide a detailed analysis of respiratory mechanics. We hypothesized that oscillometry would simplify the diagnosis of respiratory abnormalitiesin PD and improve our knowledge about the pathophysiological changes in these patients. MATERIALS AND METHODS This observational study includes 20 controls and 47 individuals with PD divided into three groups (Hoehn and Yahr Scale 1-1.5; H&Y scale 2-3 and PD smokers).The diagnostic accuracy was evaluated by investigating the area under the receiver operating characteristic curve (AUC). RESULTS Initial stages are related to increased peripheral resistance (Rp; p = 0.001). In more advanced stages, a restrictive pattern is added, reflected by reductions in dynamic compliance (p < 0.05) and increase in resonance frequency (Fr; p < 0.001). Smoking PD patients presented increased Rp (p < 0.001) and Fr (p < 0.01). PD does not introduce changes in the central airways. Oscillometric changes were correlated with respiratory muscle weakness (R = 0.37, p = 0.02). Rp showed adequate accuracy in the detection of early respiratory abnormalities (AUC = 0.858), while in more advanced stages, Fr showed high diagnostic accuracy (AUC = 0.948). The best parameter to identify changes in smoking patients was Rp (AUC = 0.896). CONCLUSION The initial stages of PD are related to a reduction in ventilation homogeneity associated with changes in peripheral airways. More advanced stages also include a restrictive ventilatory pattern. These changes were correlated with respiratory muscle weakness and were observed in mild and moderate stages of PD in smokers and non-smokers. Oscillometry may adequately identify respiratory changes in the early stages of PD and obtain high diagnostic accuracy in more advanced stages of the disease.
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Affiliation(s)
- Bruno Tavares Caldas
- Department of Physiological Sciences, Biomedical Instrumentation Laboratory, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - João Santos Pereira
- Department of Neurology, Pedro Ernesto University Hospital, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Wilma Costa Souza
- Carioca Parkinson Association, Municipal Rehabilitation Center, Rio de Janeiro, Brazil
| | - Agnaldo José Lopes
- Department of Pulmonology, Respiratory Function Testing Laboratory, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Pedro Lopes de Melo
- Department of Physiological Sciences, Biomedical Instrumentation Laboratory, State University of Rio de Janeiro, Rio de Janeiro, Brazil.
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Kaminsky DA, Cockcroft DW, Davis BE. Respiratory System Dynamics. Semin Respir Crit Care Med 2023; 44:526-537. [PMID: 37429331 DOI: 10.1055/s-0043-1770058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/12/2023]
Abstract
While static mechanical forces govern resting lung volumes, dynamic forces determine tidal breathing, airflow, and changes in airflow and lung volume during normal and abnormal breathing. This section will examine the mechanisms, measurement methodology, and interpretation of the dynamic changes in airflow and lung volume that occur in health and disease. We will first examine how the total work of breathing can be described by the parameters of the equation of motion, which determine the pressure required to move air into and out of the lung. This will include a detailed description of airflow characteristics and airway resistance. Next, we will review the changes in pressure and flow that determine maximal forced inspiration and expiration, which result in the maximal flow-volume loop and the clinically important forced expired volume in 1 second. We will also assess the mechanisms and interpretation of bronchodilator responsiveness, dynamic hyperinflation, and airways hyperresponsiveness.
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Affiliation(s)
- David A Kaminsky
- Division of Pulmonary and Critical Care, Department of Medicine, University of Vermont Larner College of Medicine, Burlington, Vermont
| | - Donald W Cockcroft
- Division of Respirology, Critical Care and Sleep Medicine, University of Saskatchewan College of Medicine, Saskatoon Saskatchewan, Canada
| | - Beth E Davis
- Division of Respirology, Critical Care and Sleep Medicine, University of Saskatchewan College of Medicine, Saskatoon Saskatchewan, Canada
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Henry C, Biardel S, Boucher M, Godbout K, Chakir J, Côté A, Laviolette M, Bossé Y. Bronchial thermoplasty attenuates bronchodilator responsiveness. Respir Med 2023; 217:107340. [PMID: 37422022 DOI: 10.1016/j.rmed.2023.107340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 05/31/2023] [Accepted: 06/25/2023] [Indexed: 07/10/2023]
Abstract
INTRODUCTION Bronchial thermoplasty is an effective intervention to improve respiratory symptoms and to reduce the rate of exacerbations in uncontrolled severe asthma. A reduction in airway smooth muscle is arguably the most widely discussed mechanisms accounting for these clinical benefits. Yet, this smooth muscle reduction should also translate into an impaired response to bronchodilator drugs. This study was designed to address this question. METHODS Eight patients with clinical indication for thermoplasty were studied. They were uncontrolled severe asthmatics despite optimal environmental control, treatment of comorbidities, and the use of high-dose inhaled corticosteroids and long-acting β2-agonists. Lung function measured by spirometry and respiratory mechanics measured by oscillometry were examined pre- and post-bronchodilator (salbutamol, 400 μg), both before and at least 1 year after thermoplasty. RESULTS Consistent with previous studies, thermoplasty yielded no benefits in terms of baseline lung function and respiratory mechanics, despite improving symptoms based on two asthma questionnaires (ACQ-5 and ACT-5). The response to salbutamol was also not affected by thermoplasty based on spirometric readouts, including forced expiratory volume in 1 s (FEV1), forced vital capacity (FVC), and FEV1/FVC ratio. However, a significant interaction was observed between thermoplasty and salbutamol for two oscillometric readouts, namely reactance at 5 Hz (Xrs5) and reactance area (Ax), showing an attenuated response to salbutamol after thermoplasty. CONCLUSIONS Thermoplasty attenuates the response to a bronchodilator. We argue that this result is a physiological proof of therapeutic efficacy, consistent with the well-described effect of thermoplasty in reducing the amount of airway smooth muscle.
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Affiliation(s)
- Cyndi Henry
- Institut Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ) - Université Laval, Québec, Canada
| | - Sabrina Biardel
- Institut Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ) - Université Laval, Québec, Canada
| | - Magali Boucher
- Institut Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ) - Université Laval, Québec, Canada
| | - Krystelle Godbout
- Institut Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ) - Université Laval, Québec, Canada
| | - Jamila Chakir
- Institut Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ) - Université Laval, Québec, Canada
| | - Andréanne Côté
- Institut Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ) - Université Laval, Québec, Canada
| | - Michel Laviolette
- Institut Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ) - Université Laval, Québec, Canada
| | - Ynuk Bossé
- Institut Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ) - Université Laval, Québec, Canada.
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Baydur A, Barbers R, May D. Effect of bronchial thermoplasty on static and dynamic lung compliance and resistance in patients with severe persistent asthma. Respir Med 2023; 217:107341. [PMID: 37429559 DOI: 10.1016/j.rmed.2023.107341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 06/21/2023] [Accepted: 06/25/2023] [Indexed: 07/12/2023]
Abstract
RATIONALE Bronchial thermoplasty (BT) reduces severity and frequency of bronchoconstriction and symptoms in severe, persistent asthmatics although it is usually not associated with change in spirometric variables. Other than spirometry. there are almost no data on changes in lung mechanics following BT. OBJECTIVE To assess lung static and dynamic lung compliance (Cst,L and Cdyn,L, respectively) and static and dynamic lung resistance (Rst,L and Rdyn,L, respectively) before and after BT in severe asthmatics using the esophageal balloon technique. METHODS Rdyn,L and Cdyn,L were measured at respiratory frequencies up to 145 breaths/min, using the esophageal balloon technique in 7 patients immediately before and 12-50 weeks after completing a series of 3 BT sessions. RESULTS All patients experienced improved symptoms within a few weeks following completion of BT. Pre-BT, all patients exhibited frequency dependency of lung compliance, with mean Cdyn,L decreasing to 63% of Cst,L at maximum respiratory rates. Post-BT, Cst,L did not change significantly from pre-thermoplasty values, while Cdyn,L diminished to 62%% of Cst,L. In 4 of 7 patients, post-BT values of Cdyn,L were consistently higher than pre-BT over the range of respiratory rates. RL in 4 of 7 patients during quiet breathing and at higher respiratory frequencies decreased following BT. CONCLUSIONS Patients with severe persistent asthma exhibit increased resting lung resistance and frequency dependence of compliance, the magnitudes of which are ameliorated in some patients following bronchial thermoplasty and associated with variable change in frequency dependence of lung resistance. These findings are related to asthma severity and may be related to the heterogeneous and variable nature of airway smooth muscle modeling and its response to BT.
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Affiliation(s)
- Ahmet Baydur
- Division of Pulmonary, Critical Care and Sleep Medicine, Keck School of Medicine, University of Southern California and Keck Medical Center, Los Angeles, CA, USA.
| | - Richard Barbers
- Division of Pulmonary, Critical Care and Sleep Medicine, Keck School of Medicine, University of Southern California and Keck Medical Center, Los Angeles, CA, USA
| | - Darren May
- Division of Pulmonary, Critical Care and Sleep Medicine, Keck School of Medicine, University of Southern California and Keck Medical Center, Los Angeles, CA, USA
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Nakayasu H, Shirai T, Hirai K, Akamatsu T, Kitahara Y. Bronchodilator response using oscillometry to detect uncontrolled asthma. Allergol Int 2023; 72:597-599. [PMID: 37270394 DOI: 10.1016/j.alit.2023.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/19/2023] [Accepted: 04/22/2023] [Indexed: 06/05/2023] Open
Affiliation(s)
- Hiromasa Nakayasu
- Department of Respiratory Medicine, Shizuoka General Hospital, Shizuoka, Japan
| | - Toshihiro Shirai
- Department of Respiratory Medicine, Shizuoka General Hospital, Shizuoka, Japan.
| | - Keita Hirai
- Department of Clinical Pharmacology and Therapeutics, Shinshu University Graduate School of Medicine, Matsumoto, Japan
| | - Taisuke Akamatsu
- Department of Respiratory Medicine, Shizuoka General Hospital, Shizuoka, Japan
| | - Yoshihiro Kitahara
- Department of Respiratory Medicine, Shizuoka General Hospital, Shizuoka, Japan
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Kostorz-Nosal S, Jastrzębski D, Błach A, Skoczyński S. Window of opportunity for respiratory oscillometry: A review of recent research. Respir Physiol Neurobiol 2023; 316:104135. [PMID: 37536553 DOI: 10.1016/j.resp.2023.104135] [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: 05/31/2023] [Revised: 07/19/2023] [Accepted: 07/30/2023] [Indexed: 08/05/2023]
Abstract
Oscillometry has been around for almost 70 years, but there are still many unknowns. The test is performed during tidal breathing and is therefore free from patient-dependent factors that could influence the results. The Forced Oscillation Technique (FOT), which requires minimal patient cooperation, is gaining ground, particularly with elderly patients and children. In pulmonology, it is a valuable tool for assessing obstructive conditions (with a distinction between central and peripheral obstruction) and restrictive disorders (intrapulmonary and extrapulmonary). Its sensitivity allows the assessment of bronchodilator and bronchoconstrictor responses. Different lung diseases show different patterns of changes in FOT, especially studied in asthma and chronic obstructive pulmonary disease. Because of these differences, many studies have analysed the usefulness of this technique in different areas of medicine. In this paper, the authors would like to present the basics of oscillometry with the areas of its most recent clinical applications.
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Affiliation(s)
- Sabina Kostorz-Nosal
- Department of Lung Diseases and Tuberculosis, Faculty of Medical Sciences in Zabrze, Medical University of Silesia in Katowice, 41-803 Zabrze, Poland.
| | - Dariusz Jastrzębski
- Department of Lung Diseases and Tuberculosis, Faculty of Medical Sciences in Zabrze, Medical University of Silesia in Katowice, 41-803 Zabrze, Poland
| | - Anna Błach
- Department of Cardiology and Structural Heart Diseases, Medical University of Silesia, Katowice, Poland
| | - Szymon Skoczyński
- Department of Lung Diseases and Tuberculosis, Faculty of Medical Sciences in Zabrze, Medical University of Silesia in Katowice, 41-803 Zabrze, Poland
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Cherrez-Ojeda I, Osorio MF, Robles-Velasco K, Calderón JC, Cortés-Télles A, Zambrano J, Guarderas C, Intriago B, Gochicoa-Rangel L. Small airway disease in post-acute COVID-19 syndrome, a non-conventional approach in three years follow-up of a patient with long COVID: a case report. J Med Case Rep 2023; 17:386. [PMID: 37691104 PMCID: PMC10494419 DOI: 10.1186/s13256-023-04113-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 08/03/2023] [Indexed: 09/12/2023] Open
Abstract
BACKGROUND Small airways disease (SAD), a novel finding described in post-acute COVID-19 patients, should be suspected when respiratory symptoms continue, air trapping persists on expiratory CT scans, and imaging findings fail to improve despite objectively better conventional pulmonary function test (PFT) parameters. The forced oscillation technique (FOT) and Multiple breathing washout (MBW) are both very sensitive methods for detecting anomalies in the peripheral airways. CASE PRESENTATION We discuss the case of a 60-year-old Hispanic patient who had severe COVID-19 pneumonia and developed dyspnea, fatigue, and limited daily activity a year later. The PFTs revealed restrictive lung disease, as seen by significant diffusing capacity of the lungs for carbon monoxide (DLCO) decrease, severe desaturation, and poor 6-min walk test (6MWT) performance. The patient was treated with lowering corticosteroids as well as pulmonary rehabilitation (PR). During the 24-month follow-up, the dyspnea and fatigue persisted. On PFTs, 6MWT performance and restricted pattern improved slightly, but MBW discovered significant ventilatory inhomogeneity. FOT revealed substantial peripheral airway obstructive abnormalities. On CT scans, air trapping and ground-glass opacities (GGO) improved somewhat. The patient used a bronchodilator twice a day and low-dose inhaled corticosteroids (160 µg of budesonide and 4.5 µg of formoterol fumarate dihydrate) for nine months. PR sessions were resuming. The restricting parameters were stabilized and the DLCO had normalized after 36 months, with a 6MWT performance of 87% but significant desaturation. The CT scan revealed traction bronchiectasis, low GGO, and persistent air trapping. Without normalization, FOT and MBW scores improved, indicating small airway disease. CONCLUSIONS The necessity of integrating these tests when detecting SAD is emphasized in our paper. This article lays the foundation for future research into the best ways to manage and monitor SAD in post-acute COVID-19 patients.
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Affiliation(s)
- Ivan Cherrez-Ojeda
- Universidad Espíritu Santo, Km. 2.5 Vía La Puntilla, Samborondón, 0901-952, Ecuador.
- Respiralab, Respiralab Research Group, Guayaquil, Ecuador.
| | - Maria F Osorio
- Universidad Espíritu Santo, Km. 2.5 Vía La Puntilla, Samborondón, 0901-952, Ecuador
| | - Karla Robles-Velasco
- Universidad Espíritu Santo, Km. 2.5 Vía La Puntilla, Samborondón, 0901-952, Ecuador
- Respiralab, Respiralab Research Group, Guayaquil, Ecuador
| | | | - Arturo Cortés-Télles
- Departamento de Neumología y Cirugía de Tórax, Hospital Regional de Alta Especialidad de Yucatán, Mérida, Mexico
| | - Jorge Zambrano
- Centro de enfermedades respiratorias, rehabilitación y sueño (CERS), Guayaquil, Ecuador
| | - Cristian Guarderas
- Centro de enfermedades respiratorias, rehabilitación y sueño (CERS), Guayaquil, Ecuador
| | - Belen Intriago
- Universidad Espíritu Santo, Km. 2.5 Vía La Puntilla, Samborondón, 0901-952, Ecuador
- Respiralab, Respiralab Research Group, Guayaquil, Ecuador
| | - Laura Gochicoa-Rangel
- Departamento de Fisiología Respiratoria, Instituto Nacional de Enfermedades Respiratorias "Ismael Cosío Villegas", Ciudad de México, Mexico
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Qvarnström B, Engström G, Frantz S, Zhou X, Zaigham S, Sundström J, Janson C, Wollmer P, Malinovschi A. Impulse oscillometry indices in relation to respiratory symptoms and spirometry in the Swedish Cardiopulmonary Bioimage Study. ERJ Open Res 2023; 9:00736-2022. [PMID: 37753278 PMCID: PMC10518858 DOI: 10.1183/23120541.00736-2022] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 05/03/2023] [Indexed: 09/28/2023] Open
Abstract
Background Impulse oscillometry (IOS) is sensitive in detecting lung function impairment. In small studies, impaired IOS relates better to respiratory symptoms than spirometry. We studied how IOS related to spirometry and respiratory symptoms in a large population of individuals (n=10 360) in a cross-sectional analysis. Methods Normal values for IOS and spirometry were defined in healthy, never-smoking individuals, aged 50-64 years, from the Swedish CArdioPulmonary bioImage Study (n=3664 for IOS and 3608 for spirometry). For IOS, abnormal values for resistance at 5 Hz (R5) and at 20 Hz and area of reactance were defined using the 95th percentile. Abnormal reactance at 5 Hz for IOS and abnormal conventional spirometry indices (forced expiratory volume in 1 s (FEV1), forced and slow vital capacity and their ratios) were defined using the 5th percentile. Results Abnormal IOS parameters were found in 16% of individuals and were associated with increased odds ratios for nearly all respiratory symptoms when adjusted for age, gender and smoking. In individuals with normal spirometry, abnormal IOS resistance was related to cough and dyspnoea, while abnormal reactance was related to wheeze. In these individuals, the combination of abnormal R5 with abnormal reactance resulted in approximately two-fold higher likelihood for having cough, chronic bronchitis and dyspnoea, even when further adjusting for FEV1, expressed as % predicted. Conclusions Abnormal IOS is related to increased respiratory burden in middle-aged individuals with normal spirometry, especially when resistance and reactance parameters are combined. The different relationships between respiratory symptoms and reactance and resistance warrant further research.
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Affiliation(s)
- Björn Qvarnström
- Dept of Medical Sciences: Clinical Physiology, Uppsala University, Uppsala, Sweden
| | - Gunnar Engström
- Dept of Clinical Sciences Malmö, Lund University, Malmö, Sweden
| | - Sophia Frantz
- Dept of Translational Medicine, Lund University, Malmö, Sweden
| | - Xingwu Zhou
- Dept of Medical Sciences: Clinical Physiology, Uppsala University, Uppsala, Sweden
- Dept of Medical Sciences: Respiratory Medicine, Sleep and Allergy, Uppsala University, Uppsala, Sweden
| | - Suneela Zaigham
- Dept of Medical Sciences: Clinical Physiology, Uppsala University, Uppsala, Sweden
- Dept of Clinical Sciences Malmö, Lund University, Malmö, Sweden
| | - Johan Sundström
- Dept of Medical Sciences: Clinical Epidemiology, Uppsala University, Uppsala, Sweden
| | - Christer Janson
- Dept of Medical Sciences: Respiratory Medicine, Sleep and Allergy, Uppsala University, Uppsala, Sweden
| | - Per Wollmer
- Dept of Translational Medicine, Lund University, Malmö, Sweden
| | - Andrei Malinovschi
- Dept of Medical Sciences: Clinical Physiology, Uppsala University, Uppsala, Sweden
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Toumpanakis D, Usmani OS. Small airways in asthma: Pathophysiology, identification and management. CHINESE MEDICAL JOURNAL PULMONARY AND CRITICAL CARE MEDICINE 2023; 1:171-180. [PMID: 39171124 PMCID: PMC11332871 DOI: 10.1016/j.pccm.2023.07.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Indexed: 08/23/2024]
Abstract
Background The aim of this review is to summarize the current evidence regarding small airway disease in asthma, focusing on recent advances in small airway pathophysiology, assessment and therapeutic implications. Methods A search in Medline was performed, using the keywords "small airways", "asthma", "oscillometry", "nitrogen washout" and "imaging". Our review was based on studies from adult asthmatic patients, although evidence from pediatric populations is also discussed. Results In asthma, inflammation in small airways, increased mucus production and airway wall remodelling are the main pathogenetic mechanisms of small airway disease. Small airway dysfunction is a key component of asthma pathophysiology, leading to increased small airway resistance and airway closure, with subsequent ventilation inhomogeneities, hyperresponsiveness and airflow limitation. Classic tests of lung function, such as spirometry and body plethysmography are insensitive to detect small airway disease, providing only indirect measurements. As discussed in our review, both functional and imaging techniques that are more specific for small airways, such as oscillometry and the multiple breath nitrogen washout have delineated the role of small airways in asthma. Small airways disease is prevalent across all asthma disease stages and especially in severe disease, correlating with important clinical outcomes, such as asthma control and exacerbation frequency. Moreover, markers of small airways dysfunction have been used to guide asthma treatment and monitor response to therapy. Conclusions Assessment of small airway disease provides unique information for asthma diagnosis and monitoring, with potential therapeutic implications.
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Affiliation(s)
- Dimitrios Toumpanakis
- National Heart and Lung Institute, Imperial College London, London, SW3 6LY, United Kingdom
- General State Hospital for Thoracic Diseases of Athens “Sotiria”, Athens, 11527, Greece
| | - Omar S. Usmani
- National Heart and Lung Institute, Imperial College London, London, SW3 6LY, United Kingdom
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Menzella F, Antonicelli L, Cottini M, Imeri G, Corsi L, Di Marco F. Oscillometry in severe asthma: the state of the art and future perspectives. Expert Rev Respir Med 2023; 17:563-575. [PMID: 37452692 DOI: 10.1080/17476348.2023.2237872] [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: 04/18/2023] [Revised: 07/07/2023] [Accepted: 07/14/2023] [Indexed: 07/18/2023]
Abstract
INTRODUCTION Approximately 3-10% of people with asthma have severe asthma (SA). Patients with SA have greater impairment in daily life and much higher costs. Even if asthma affects the entire bronchial tree, small airways have been recognized as the major site of airflow limitation. There are several tools for studying small airway dysfunction (SAD), but certainly the most interesting is oscillometry. Despite several studies, the clinical usefulness of oscillometry in asthma is still in question. This paper aims to provide evidence supporting the use of oscillometry to improve the management of SA in clinical practice. AREAS COVERED In the ATLANTIS study, SAD was strongly evident across all severity. Various tools are available for evaluation of SAD, and certainly an integrated use of these can provide complete and detailed information. However, the most suitable method is oscillometry, implemented for clinical routine by using either small pressure impulses or small pressure sinusoidal waves. EXPERT OPINION Oscillometry, despite its different technological implementations is the best tool for determining the impact of SAD on asthma and its control. Oscillometry will also be increasingly useful for choosing the appropriate drug, and there is ample room for a more widespread diffusion in clinical practice.
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Affiliation(s)
| | | | | | - Gianluca Imeri
- Respiratory Unit, ASST Papa Giovanni XXIII Hospital, Bergamo, Italy
| | - Lorenzo Corsi
- Pulmonology Unit, S. Valentino Hospital, Treviso, Italy
| | - Fabiano Di Marco
- Respiratory Unit, ASST Papa Giovanni XXIII Hospital, Bergamo, Italy
- Department of Health Sciences, University of Milan, Bergamo, Italy
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