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Petnak T, Cheungpasitporn W, Thongprayoon C, Sodsri T, Tangpanithandee S, Moua T. Phenotypic subtypes of fibrotic hypersensitivity pneumonitis identified by machine learning consensus clustering analysis. Respir Res 2024; 25:41. [PMID: 38238763 PMCID: PMC10797808 DOI: 10.1186/s12931-024-02664-x] [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: 08/01/2023] [Accepted: 01/01/2024] [Indexed: 01/22/2024] Open
Abstract
BACKGROUND Patients with fibrotic hypersensitivity pneumonitis (f-HP) have varied clinical and radiologic presentations whose associated phenotypic outcomes have not been previously described. We conducted a study to evaluate mortality and lung transplant (LT) outcomes among clinical clusters of f-HP as characterized by an unsupervised machine learning approach. METHODS Consensus cluster analysis was performed on a retrospective cohort of f-HP patients diagnosed according to recent international guideline. Demographics, antigen exposure, radiologic, histopathologic, and pulmonary function findings along with comorbidities were included in the cluster analysis. Cox proportional-hazards regression was used to assess mortality or LT risk as a combined outcome for each cluster. RESULTS Three distinct clusters were identified among 336 f-HP patients. Cluster 1 (n = 158, 47%) was characterized by mild restriction on pulmonary function testing (PFT). Cluster 2 (n = 46, 14%) was characterized by younger age, lower BMI, and a higher proportion of identifiable causative antigens with baseline obstructive physiology. Cluster 3 (n = 132, 39%) was characterized by moderate to severe restriction. When compared to cluster 1, mortality or LT risk was lower in cluster 2 (hazard ratio (HR) of 0.42; 95% CI, 0.21-0.82; P = 0.01) and higher in cluster 3 (HR of 1.76; 95% CI, 1.24-2.48; P = 0.001). CONCLUSIONS Three distinct phenotypes of f-HP with unique mortality or transplant outcomes were found using unsupervised cluster analysis, highlighting improved mortality in fibrotic patients with obstructive physiology and identifiable antigens.
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Affiliation(s)
- Tananchai Petnak
- Division of Pulmonary and Pulmonary Critical Care Medicine, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Nakhon Pathom, Thailand
- Division of Pulmonary and Critical Care Medicine, Mayo Clinic, 200 First St SW, Rochester, MN, 55905, United States
| | | | - Charat Thongprayoon
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN, United States
| | - Tulaton Sodsri
- Faculty of Medicine Ramathibodi Hospital, Chakri Naruebodindra Medical Institute, Mahidol University, Samut Prakan, Thailand
| | | | - Teng Moua
- Division of Pulmonary and Critical Care Medicine, Mayo Clinic, 200 First St SW, Rochester, MN, 55905, United States.
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2
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Barkas GI, Daniil Z, Kotsiou OS. The Role of Small Airway Disease in Pulmonary Fibrotic Diseases. J Pers Med 2023; 13:1600. [PMID: 38003915 PMCID: PMC10672167 DOI: 10.3390/jpm13111600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 11/05/2023] [Accepted: 11/06/2023] [Indexed: 11/26/2023] Open
Abstract
Small airway disease (SAD) is a pathological condition that affects the bronchioles and non-cartilaginous airways 2 mm or less in diameter. These airways play a crucial role in respiratory function and are often implicated in various pulmonary disorders. Pulmonary fibrotic diseases are characterized by the thickening and scarring of lung tissue, leading to progressive respiratory failure. We aimed to present the link between SAD and fibrotic lung conditions. The evidence suggests that SAD may act as a precursor or exacerbating factor in the progression of fibrotic diseases. Patients with fibrotic conditions often exhibit signs of small airway dysfunction, which can contribute to worsening respiratory symptoms and decreased lung function. Moreover, individuals with advanced SAD are at a heightened risk of developing fibrotic changes in the lung. The interplay between inflammation, environmental factors, and genetic predisposition further complicates this association. The early detection and management of SAD can potentially mitigate the progression of fibrotic diseases, highlighting the need for comprehensive clinical evaluation and research. This review emphasizes the need to understand the evolving connection between SAD and pulmonary fibrosis, urging further detailed research to clarify the causes and potential treatment between the two entities.
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Affiliation(s)
- Georgios I. Barkas
- Department of Human Pathophysiology, Faculty of Nursing, University of Thessaly, 41500 Larissa, Greece;
| | - Zoe Daniil
- Department of Respiratory Medicine, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece;
| | - Ourania S. Kotsiou
- Department of Human Pathophysiology, Faculty of Nursing, University of Thessaly, 41500 Larissa, Greece;
- Department of Respiratory Medicine, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece;
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3
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Zhang X, Xie B, Ban C, Ren Y, Ye Q, Zhu M, Liu Y, Zhang S, Geng J, Jiang D, Dai H. Small airway dysfunction in Chinese patients with idiopathic pulmonary fibrosis. BMC Pulm Med 2022; 22:297. [PMID: 35918677 PMCID: PMC9347131 DOI: 10.1186/s12890-022-02089-6] [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: 05/14/2022] [Accepted: 07/26/2022] [Indexed: 11/20/2022] Open
Abstract
Background Recent years, idiopathic pulmonary fibrosis (IPF) is thought to be a disease of alveoli as well as small airways. This study aimed to demonstrate the clinical feature, predictor, and prognosis of small airway dysfunction (SAD) in Chinese patients with IPF. Methods We enrolled 416 patients with IPF who hospitalized in Beijing Chao-Yang Hospital from 2000 to 2014 in this study, and the follow-up ended at December 2016. We collected demographic information, clinical examination results, spirometry results, HRCT results, and blood gas results during the study. Logistic regression analysis was used to identify the predictor for SAD. The COX proportional hazard model was used to analysis the prognosis effect of SAD. Results Among all the participants, 165 (39.66%) patients had SAD. FEV1 (% predicted) and FEV3/FVC were significantly associated with SAD in patients with IPF. IPF patients with lower FEV1 (% predicted, OR 30.04, 95% CI 9.61–93.90) and FEV3/FVC (OR 77.76, 95% CI 15.44–391.63) had increased risk for SAD. Patients with SAD were associated with significantly increased risk of mortality in patients with IPF (HR 1.73, 95% CI 1.02–2.92), as well as in IPF patients without other pulmonary comorbidities (COPD, emphysema, and asthma). Conclusions Spirometry-defined SAD was like 40% in patients with IPF. Lower FEV1 (% predicted) and FEV3/FVC were main predictors for SAD. IPF patients with SAD showed poorer prognosis. Supplementary Information The online version contains supplementary material available at 10.1186/s12890-022-02089-6.
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Affiliation(s)
- Xinran Zhang
- Department of Clinical Research and Data Management, Center of Respiratory Medicine, China-Japan Friendship Hospital, National Center for Respiratory Medicine; Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, National Clinical Research Center for Respiratory Diseases, Beijing, 100029, China
| | - Bingbing Xie
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, National Center for Respiratory Medicine; National Clinical Research Center for Respiratory Diseases, Institute of Respiratory Medicine, Chinese Academy of Medical Science, Peking Union Medical College, Beijing, 100029, China
| | - Chenjun Ban
- Department of Respiration, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, 100027, China
| | - Yanhong Ren
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, National Center for Respiratory Medicine; National Clinical Research Center for Respiratory Diseases, Institute of Respiratory Medicine, Chinese Academy of Medical Science, Peking Union Medical College, Beijing, 100029, China
| | - Qiao Ye
- Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, 100020, China
| | - Min Zhu
- Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, 100020, China
| | - Yan Liu
- Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, 100020, China
| | - Shu Zhang
- Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, 100020, China
| | - Jing Geng
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, National Center for Respiratory Medicine; National Clinical Research Center for Respiratory Diseases, Institute of Respiratory Medicine, Chinese Academy of Medical Science, Peking Union Medical College, Beijing, 100029, China
| | - Dingyuan Jiang
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, National Center for Respiratory Medicine; National Clinical Research Center for Respiratory Diseases, Institute of Respiratory Medicine, Chinese Academy of Medical Science, Peking Union Medical College, Beijing, 100029, China
| | - Huaping Dai
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, National Center for Respiratory Medicine; National Clinical Research Center for Respiratory Diseases, Institute of Respiratory Medicine, Chinese Academy of Medical Science, Peking Union Medical College, Beijing, 100029, China. .,Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, 100020, China. .,Department of Respiratory and Critical Care Medicine, China-Japan Friendship Hospital, 2 Yinghuayuan E St, Chaoyang District, Beijing, 100029, China.
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4
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Oțelea MR, Fell AKM, Handra CM, Holm M, Filon FL, Mijakovski D, Minov J, Mutu A, Stephanou E, Stokholm ZA, Stoleski S, Schlünssen V. The value of fractional exhaled nitric oxide in occupational diseases - a systematic review. J Occup Med Toxicol 2022; 17:14. [PMID: 35879723 PMCID: PMC9317127 DOI: 10.1186/s12995-022-00355-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 07/04/2022] [Indexed: 12/04/2022] Open
Abstract
Fractional exhaled nitric oxide (FeNO) is a non-invasive biomarker of respiratory tract inflammation, originally designated to identify eosinophilic airway inflammation and to predict steroid response. The main field of application of this biomarker is asthma, but FeNO has also been used for other allergic and non-allergic pulmonary disorders such as chronic obstructive pulmonary disease, hypersensitivity pneumonitis and interstitial lung disease. A substantial part of respiratory diseases are related to work, and FeNO, a safe and easy measure to conduct, is a potential valid examination in an occupational setting. This systematic review assesses the value of measuring FeNO related to three types of airborne exposures: allergens, irritants, and respiratory particles inhaled during occupational activities. The review covers results from longitudinal and observational clinical studies, and highlights the added value of this biomarker in monitoring effects of exposure and in the diagnostic criteria of occupational diseases. This review also covers the possible significance of FeNO as an indicator of the efficacy of interventions to prevent work-related respiratory diseases. Initially, 246 articles were identified in PUBMED and SCOPUS. Duplicates and articles which covered results from the general population, symptoms (not disease) related to work, non-occupational diseases, and case reports were excluded. Finally, 39 articles contributed to this review, which led to the following conclusions: a) For occupational asthma there is no consensus on the significant value of FeNO for diagnosis, or on the magnitude of change needed after specific inhalation test or occupational exposure at the workplace. There is some consensus for the optimal time to measure FeNO after exposure, mainly after 24 h, and FeNO proved to be more sensitive than spirometry in measuring the result of an intervention. b) For other occupational obstructive respiratory diseases, current data suggests performing the measurement after the work shift. c) For interstitial lung disease, the evaluation of the alveolar component of NO is probably the most suitable.
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Affiliation(s)
| | - Anne Kristin M Fell
- Occupational and Environmental Medicine, Telemark Hospital, Skien, Norway.,Department of Global Health and Community Medicine, Institute of Health and Community, University of Oslo, Oslo, Norway
| | - Claudia Mariana Handra
- Carol Davila University of Medicine and Pharmacy, Bucharest, Romania.,Colentina Clinical Hospital, Clinic for Occupational Medicine, Bucharest, Romania
| | - Mathias Holm
- Occupational and Environmental Medicine, School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Francesca Larese Filon
- Unit of Occupational Medicine, Department of Medical Sciences, University of Trieste, Trieste, Italy
| | - Dragan Mijakovski
- Institute of Occupational Health of RN Macedonia, Skopje, North Macedonia.,Faculty of Medicine, Ss. Cyril and Methodius, University in Skopje, Skopje, North Macedonia
| | - Jordan Minov
- Institute of Occupational Health of RN Macedonia, Skopje, North Macedonia.,Faculty of Medicine, Ss. Cyril and Methodius, University in Skopje, Skopje, North Macedonia
| | - Andreea Mutu
- Carol Davila University of Medicine and Pharmacy, Bucharest, Romania.,Central Military University Emergency Hospital "Carol Davila", Bucharest, Romania
| | | | - Zara Ann Stokholm
- Department of Occupational Medicine, Danish Ramazzini Centre, Aarhus University Hospital, Aarhus, Denmark
| | - Sasho Stoleski
- Institute of Occupational Health of RN Macedonia, Skopje, North Macedonia.,Faculty of Medicine, Ss. Cyril and Methodius, University in Skopje, Skopje, North Macedonia
| | - Vivi Schlünssen
- Department of Public Health, Environment, Occupation and Health, Danish Ramazzini Centre, Aarhus University, Aarhus, Denmark
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5
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Functional parameters of small airways can guide bronchodilator use in idiopathic pulmonary fibrosis. Sci Rep 2020; 10:18633. [PMID: 33122741 PMCID: PMC7596229 DOI: 10.1038/s41598-020-75597-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Accepted: 10/06/2020] [Indexed: 01/09/2023] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) may present comorbid obstructive lung diseases with small airway dysfunction (SAD). Existing guidelines suggest that inhaled bronchodilators should be used if the ratio of forced expiratory volume in the 1st second and forced vital capacity (FEV1/FVC) < 0.7 in IPF. However, most IPF patients have FEV1/FVC > 0.7 even with coexisting emphysema. We retrospectively enrolled IPF patients who were registered at our outpatient clinic. At baseline, 63 patients completed computed tomography (CT) scans, lung function measurements, and symptom questionnaires. Among these patients, 54 (85.71%) underwent antifibrotic treatment and 38 (60.32%) underwent long-acting bronchodilator treatment. The median FEV1/FVC was 0.86. Not all patients treated with bronchodilators showed significant changes in lung function. IPF patients with SAD, determined by IOS parameters, showed significant improvement in FEV1, FEF25–75%, and symptom scores after bronchodilator treatment. Bronchodilator efficacy was not observed in patients without SAD. CT-confirmed emphysema was seen in 34.92% of patients. There were no changes in lung function or symptom scores after bronchodilator treatment in patients with emphysema. In conclusion, FEV1/FVC cannot reflect the airflow limitation in IPF. Emphysema in IPF is not a deciding factor in whether patients should receive bronchodilator treatment. IOS parameters may be useful to guide bronchodilator therapy in patients with IPF coexisting with SAD.
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6
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Hirakawa H, Tashiro H, Takahashi K, Tanaka M, Sadamatsu H, Kimura S, Sueoka-Aragane N. Mesalazine-induced airway obstruction: Utility of pulmonary function testing in drug-induced lung diseases. Respir Investig 2019; 57:611-614. [PMID: 31601486 DOI: 10.1016/j.resinv.2019.09.002] [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: 07/05/2019] [Revised: 08/20/2019] [Accepted: 09/12/2019] [Indexed: 06/10/2023]
Abstract
Mesalazine is a standard therapeutic agent for the treatment of inflammatory bowel diseases. A rare case of mesalazine-induced airway obstruction documented by pulmonary function testing is reported herein. The patient had Crohn's disease and was treated with mesalazine; she subsequently developed a high fever, cough, and chest pain with centrilobular nodular shadows on chest computed tomography (CT). After cessation of mesalazine, the abnormal CT findings as well as the decreased forced expiratory volume in 1 second improved. Based on these findings, pulmonary function testing appears to be a useful tool, even in the acute phase, along with chest CT in drug-induced lung diseases.
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Affiliation(s)
- Haruki Hirakawa
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, Saga Prefecture, 849-8501, Japan
| | - Hiroki Tashiro
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, Saga Prefecture, 849-8501, Japan.
| | - Koichiro Takahashi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, Saga Prefecture, 849-8501, Japan
| | - Masahide Tanaka
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, Saga Prefecture, 849-8501, Japan
| | - Hironori Sadamatsu
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, Saga Prefecture, 849-8501, Japan
| | - Shinya Kimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, Saga Prefecture, 849-8501, Japan
| | - Naoko Sueoka-Aragane
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, Saga Prefecture, 849-8501, Japan
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7
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Forced Oscillation Technique and Small Airway Involvement in Chronic Hypersensitivity Pneumonitis. Arch Bronconeumol 2019; 55:519-525. [DOI: 10.1016/j.arbres.2019.01.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 12/22/2018] [Accepted: 01/29/2019] [Indexed: 11/21/2022]
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8
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Looking at the Airway to Understand Interstitial Lung Disease. Ann Am Thorac Soc 2019; 16:432-434. [PMID: 30932706 DOI: 10.1513/annalsats.201811-799ed] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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9
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Faverio P, De Giacomi F, Bonaiti G, Stainer A, Sardella L, Pellegrino G, Sferrazza Papa GF, Bini F, Bodini BD, Carone M, Annoni S, Messinesi G, Pesci A. Management of Chronic Respiratory Failure in Interstitial Lung Diseases: Overview and Clinical Insights. Int J Med Sci 2019; 16:967-980. [PMID: 31341410 PMCID: PMC6643124 DOI: 10.7150/ijms.32752] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 05/05/2019] [Indexed: 01/11/2023] Open
Abstract
Interstitial lung diseases (ILDs) may be complicated by chronic respiratory failure (CRF), especially in the advanced stages. Aim of this narrative review is to evaluate the current evidence in management of CRF in ILDs. Many physiological mechanisms underlie CRF in ILDs, including lung restriction, ventilation/perfusion mismatch, impaired diffusion capacity and pulmonary vascular damage. Intermittent exertional hypoxemia is often the initial sign of CRF, evolving, as ILD progresses, into continuous hypoxemia. In the majority of the cases, the development of CRF is secondary to the worsening of the underlying disease; however, associated comorbidities may also play a role. When managing CRF in ILDs, the need for pulmonary rehabilitation, the referral to lung transplant centers and palliative care should be assessed and, if necessary, promptly offered. Long-term oxygen therapy is commonly prescribed in case of resting or exertional hypoxemia with the purpose to decrease dyspnea and improve exercise tolerance. High-Flow Nasal Cannula oxygen therapy may be used as an alternative to conventional oxygen therapy for ILD patients with severe hypoxemia requiring both high flows and high oxygen concentrations. Non-Invasive Ventilation may be used in the chronic setting for palliation of end-stage ILD patients, although the evidence to support this application is very limited.
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Affiliation(s)
- Paola Faverio
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy; Respiratory Unit, San Gerardo Hospital, ASST di Monza, Monza, Italy
| | - Federica De Giacomi
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy; Respiratory Unit, San Gerardo Hospital, ASST di Monza, Monza, Italy
| | - Giulia Bonaiti
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy; Respiratory Unit, San Gerardo Hospital, ASST di Monza, Monza, Italy
| | - Anna Stainer
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy; Respiratory Unit, San Gerardo Hospital, ASST di Monza, Monza, Italy
| | - Luca Sardella
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy; Respiratory Unit, San Gerardo Hospital, ASST di Monza, Monza, Italy
| | - Giulia Pellegrino
- Casa di Cura del Policlinico, Dipartimento di Scienze Neuroriabilitative, Milan, Italy
| | | | - Francesco Bini
- UOC Pulmonology, Department of Internal Medicine, Ospedale ASST-Rhodense, Garbagnate Milanese, Italy
| | - Bruno Dino Bodini
- Pulmonology Unit, Ospedale Maggiore della Carità, University of Piemonte Orientale, Novara, Italy
| | - Mauro Carone
- UOC Pulmonology and Pulmonary Rehabilitation, Istituti Clinici Scientifici Maugeri, IRCCS di Cassano Murge (BA), Italy
| | - Sara Annoni
- Physical therapy and Rehabilitation Unit, San Gerardo Hospital, ASST di Monza, Monza, Italy
| | - Grazia Messinesi
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy; Respiratory Unit, San Gerardo Hospital, ASST di Monza, Monza, Italy
| | - Alberto Pesci
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy; Respiratory Unit, San Gerardo Hospital, ASST di Monza, Monza, Italy
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Dias OM, Baldi BG, Ferreira JG, Cardenas LZ, Pennati F, Salito C, Carvalho CRR, Aliverti A, Pereira de Albuquerque AL. Mechanisms of exercise limitation in patients with chronic hypersensitivity pneumonitis. ERJ Open Res 2018; 4:00043-2018. [PMID: 30151370 PMCID: PMC6104296 DOI: 10.1183/23120541.00043-2018] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 07/05/2018] [Indexed: 01/02/2023] Open
Abstract
Small airway and interstitial pulmonary involvements are prominent in chronic hypersensitivity pneumonitis (cHP). However, their roles on exercise limitation and the relationship with functional lung tests have not been studied in detail. Our aim was to evaluate exercise performance and its determinants in cHP. We evaluated maximal cardiopulmonary exercise testing performance in 28 cHP patients (forced vital capacity 57±17% pred) and 18 healthy controls during cycling. Patients had reduced exercise performance with lower peak oxygen production (16.6 (12.3–19.98) mL·kg−1·min−1versus 25.1 (16.9–32.0), p=0.003), diminished breathing reserve (% maximal voluntary ventilation) (12 (6.4–34.8)% versus 41 (32.7–50.8)%, p<0.001) and hyperventilation (minute ventilation/carbon dioxide production slope 37±5 versus 31±4, p<0.001). All patients presented oxygen desaturation and augmented Borg dyspnoea scores (8 (5–10) versus 4 (1–7), p=0.004). The prevalence of dynamic hyperinflation was found in only 18% of patients. When comparing cHP patients with normal and low peak oxygen production (<84% pred, lower limit of normal), the latter exhibited a higher minute ventilation/carbon dioxide production slope (39±5.0 versus 34±3.6, p=0.004), lower tidal volume (0.84 (0.78–0.90) L versus 1.15 (0.97–1.67) L, p=0.002), and poorer physical functioning score on the Short form-36 health survey. Receiver operating characteristic curve analysis showed that reduced lung volumes (forced vital capacity %, total lung capacity % and diffusing capacity of the lung for carbon dioxide %) were high predictors of poor exercise capacity. Reduced exercise capacity was prevalent in patients because of ventilatory limitation and not due to dynamic hyperinflation. Reduced lung volumes were reliable predictors of lower performance during exercise. Besides significant small airway involvement, reduced exercise capacity is due to ventilatory limitation and not due to dynamic hyperinflation in chronic hypersensitivity pneumonitishttp://ow.ly/Ou9230kSBQz
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Affiliation(s)
- Olívia Meira Dias
- Divisao de Pneumologia, Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sâo Paulo, Sâo Paulo, Brazil
| | - Bruno Guedes Baldi
- Divisao de Pneumologia, Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sâo Paulo, Sâo Paulo, Brazil
| | - Jeferson George Ferreira
- Divisao de Pneumologia, Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sâo Paulo, Sâo Paulo, Brazil
| | - Letícia Zumpano Cardenas
- Divisao de Pneumologia, Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sâo Paulo, Sâo Paulo, Brazil
| | - Francesca Pennati
- Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Milan, Italy
| | - Caterina Salito
- Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Milan, Italy
| | - Carlos Roberto Ribeiro Carvalho
- Divisao de Pneumologia, Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sâo Paulo, Sâo Paulo, Brazil
| | - Andrea Aliverti
- Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Milan, Italy
| | - André Luis Pereira de Albuquerque
- Divisao de Pneumologia, Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sâo Paulo, Sâo Paulo, Brazil
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11
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Soumagne T, Dalphin JC. Current and emerging techniques for the diagnosis of hypersensitivity pneumonitis. Expert Rev Respir Med 2018; 12:493-507. [PMID: 29727203 DOI: 10.1080/17476348.2018.1473036] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
INTRODUCTION Hypersensitivity pneumonitis (HP) is the result of an immunologically induced inflammation of the lung parenchyma in response to inhalation exposure to a large variety of antigens in genetically susceptible individuals. HP shares clinical and radiological features with other acute and chronic interstitial lung diseases and is sometimes difficult to diagnose if exposure to an antigenic agent is not detected. Several classifications and diagnostic criteria have been proposed but are not currently recommended by guidelines from any scientific society. However, advances have been made over the past ten years in improving the diagnosis of HP. Areas covered: This article will provide a summary of the different classification and diagnostic criteria proposed in acute and chronic forms of HP. In addition, we review current diagnostic procedures including antigen detection, high resolution computed tomography, histopathology and provide an overview of emerging techniques. Expert commentary: Important changes are occurring in the field of HP and knowledge of the disease will likely progress enormously in the coming 5 to 10 years as many techniques continue to be developed, including genomic signature and diagnostic biomarkers.
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Affiliation(s)
- Thibaud Soumagne
- a Service de Pneumologie , CHU de Besançon , Besançon , France.,b UMR 6249 Chrono-environnement , Université de Franche-Comté , Besançon , France
| | - Jean Charles Dalphin
- a Service de Pneumologie , CHU de Besançon , Besançon , France.,b UMR 6249 Chrono-environnement , Université de Franche-Comté , Besançon , France
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Piper AJ, Wort SJ, Renzoni EA, Kouranos V. Year in review 2017: Interstitial lung disease, pulmonary vascular disease and sleep. Respirology 2018; 23:421-433. [PMID: 29471594 DOI: 10.1111/resp.13273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Accepted: 02/01/2018] [Indexed: 12/01/2022]
Affiliation(s)
- Amanda J Piper
- Department of Respiratory and Sleep Medicine, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia.,Central Clinical School, University of Sydney, Sydney, New South Wales, Australia
| | - Stephen J Wort
- Pulmonary Hypertension Department, Royal Brompton Hospital, Imperial College, London, UK
| | - Elisabetta A Renzoni
- Interstitial Lung Disease Unit, Royal Brompton Hospital, Imperial College, London, UK
| | - Vasileios Kouranos
- Interstitial Lung Disease Unit, Royal Brompton Hospital, Imperial College, London, UK
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