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Siniscalchi C, Nouvenne A, Cerundolo N, Meschi T, Ticinesi A. Diaphragm Ultrasound in Different Clinical Scenarios: A Review with a Focus on Older Patients. Geriatrics (Basel) 2024; 9:70. [PMID: 38920426 PMCID: PMC11202496 DOI: 10.3390/geriatrics9030070] [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: 04/15/2024] [Revised: 05/08/2024] [Accepted: 05/28/2024] [Indexed: 06/27/2024] Open
Abstract
Diaphragm muscle dysfunction is increasingly recognized as a fundamental marker of several age-related diseases and conditions including chronic obstructive pulmonary disease, heart failure and critical illness with respiratory failure. In older individuals with physical frailty and sarcopenia, the loss of muscle mass and function may also involve the diaphragm, contributing to respiratory dysfunction. Ultrasound has recently emerged as a feasible and reliable strategy to visualize diaphragm structure and function. In particular, it can help to predict the timing of extubation in patients undergoing mechanical ventilation in intensive care units (ICUs). Ultrasonographic evaluation of diaphragmatic function is relatively cheap, safe and quick and can provide useful information for real-time monitoring of respiratory function. In this review, we aim to present the current state of scientific evidence on the usefulness of ultrasound in the assessment of diaphragm dysfunction in different clinical settings, with a particular focus on older patients. We highlight the importance of the qualitative information gathered by ultrasound to assess the integrity, excursion, thickness and thickening of the diaphragm. The implementation of bedside diaphragm ultrasound could be useful for improving the quality and appropriateness of care, especially in older subjects with sarcopenia who experience acute respiratory failure, not only in the ICU setting.
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Affiliation(s)
- Carmine Siniscalchi
- Department of Continuity of Care and Multicomplexity, Azienda Ospedaliero-Universitaria di Parma, Via Antonio Gramsci 14, 43126 Parma, Italy; (C.S.); (A.N.); (N.C.); (T.M.)
| | - Antonio Nouvenne
- Department of Continuity of Care and Multicomplexity, Azienda Ospedaliero-Universitaria di Parma, Via Antonio Gramsci 14, 43126 Parma, Italy; (C.S.); (A.N.); (N.C.); (T.M.)
- Department of Medicine and Surgery, University of Parma, Via Antonio Gramsci 14, 43126 Parma, Italy
| | - Nicoletta Cerundolo
- Department of Continuity of Care and Multicomplexity, Azienda Ospedaliero-Universitaria di Parma, Via Antonio Gramsci 14, 43126 Parma, Italy; (C.S.); (A.N.); (N.C.); (T.M.)
| | - Tiziana Meschi
- Department of Continuity of Care and Multicomplexity, Azienda Ospedaliero-Universitaria di Parma, Via Antonio Gramsci 14, 43126 Parma, Italy; (C.S.); (A.N.); (N.C.); (T.M.)
- Department of Medicine and Surgery, University of Parma, Via Antonio Gramsci 14, 43126 Parma, Italy
| | - Andrea Ticinesi
- Department of Continuity of Care and Multicomplexity, Azienda Ospedaliero-Universitaria di Parma, Via Antonio Gramsci 14, 43126 Parma, Italy; (C.S.); (A.N.); (N.C.); (T.M.)
- Department of Medicine and Surgery, University of Parma, Via Antonio Gramsci 14, 43126 Parma, Italy
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Rittayamai N, Marinpong V, Chuaychoo B, Tscheikuna J, Brochard LJ. Ultrasound Evaluation of Parasternal Intercostal, Diaphragm Activity, and Their Ratio in Male Patients with Chronic Obstructive Pulmonary Disease. Am J Respir Crit Care Med 2024; 209:1016-1018. [PMID: 38319129 DOI: 10.1164/rccm.202310-1769le] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 02/05/2024] [Indexed: 02/07/2024] Open
Affiliation(s)
- Nuttapol Rittayamai
- Division of Respiratory Disease and Tuberculosis, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Vilasinee Marinpong
- Division of Respiratory Disease and Tuberculosis, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Benjamas Chuaychoo
- Division of Respiratory Disease and Tuberculosis, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Jamsak Tscheikuna
- Division of Respiratory Disease and Tuberculosis, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Laurent J Brochard
- Keenan Research Centre for Biomedical Science, Li Ka Shing Knowledge Institute, Unity Health Toronto, Toronto, Ontario, Canada; and
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Ontario, Canada
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Maiorano A, Lupia C, Montenegro N, Neri G, Bruni A, Garofalo E, Longhini F, Crimi C, Maglio A, Vatrella A, Pelaia G, Pelaia C. Effects of inhaled beclomethasone dipropionate/formoterol fumarate/glycopyrronium on diaphragmatic workload and lung function in uncontrolled asthma: a case report. Front Med (Lausanne) 2024; 11:1357362. [PMID: 38504920 PMCID: PMC10948428 DOI: 10.3389/fmed.2024.1357362] [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: 12/18/2023] [Accepted: 02/16/2024] [Indexed: 03/21/2024] Open
Abstract
Beclomethasone dipropionate/formoterol fumarate/glycopyrronium (BDP/FF/G) single inhaler extrafine triple therapy is effective for the treatment of uncontrolled asthma. Nevertheless, there is a lack of data about the use of diaphragmatic ultrasonography to monitor adult asthmatics while they are receiving inhaled treatment. We took into consideration a 78-year-old woman complaining of asthma, treated with inhaled corticosteroid/long-acting β2-adrenergic agonist (ICS/LABA), characterized by an asthma control questionnaire-5 (ACQ-5) score and a lung function test suggestive of uncontrolled asthma. Moreover, a diaphragmatic ultrasound showed signs of high diaphragm workload. Because of these findings, we proposed to our patient a shift toward triple inhaled therapy with BDP/FF/G, and she underwent a second evaluation after 7 days of treatment. Improvements in the diaphragmatic ultrasound parameters, lung function test, and ACQ-5 score were found. In particular, we detected a reduction of thickening fraction (TF), and a normalization of the other diaphragmatic measures, indicative of a decrease in diaphragmatic workload. To our knowledge, this is the first literature report showing concomitant improvements of both lung function tests and diaphragmatic ultrasonography parameters, observed in an adult patient with uncontrolled asthma after short-term treatment with the single inhaler triple therapy BDP/FF/G.
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Affiliation(s)
- Antonio Maiorano
- Department of Health Sciences, University “Magna Graecia” of Catanzaro, Catanzaro, Italy
| | - Chiara Lupia
- Department of Health Sciences, University “Magna Graecia” of Catanzaro, Catanzaro, Italy
| | - Nicola Montenegro
- Department of Health Sciences, University “Magna Graecia” of Catanzaro, Catanzaro, Italy
| | - Giuseppe Neri
- Department of Medical and Surgical Sciences, University “Magna Graecia” of Catanzaro, Catanzaro, Italy
| | - Andrea Bruni
- Department of Medical and Surgical Sciences, University “Magna Graecia” of Catanzaro, Catanzaro, Italy
| | - Eugenio Garofalo
- Department of Medical and Surgical Sciences, University “Magna Graecia” of Catanzaro, Catanzaro, Italy
| | - Federico Longhini
- Department of Medical and Surgical Sciences, University “Magna Graecia” of Catanzaro, Catanzaro, Italy
| | - Claudia Crimi
- Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
| | - Angelantonio Maglio
- Department of Medicine, Surgery and Dentistry, University of Salerno, Salerno, Italy
| | - Alessandro Vatrella
- Department of Medicine, Surgery and Dentistry, University of Salerno, Salerno, Italy
| | - Girolamo Pelaia
- Department of Health Sciences, University “Magna Graecia” of Catanzaro, Catanzaro, Italy
| | - Corrado Pelaia
- Department of Medical and Surgical Sciences, University “Magna Graecia” of Catanzaro, Catanzaro, Italy
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Schenesse D, Mouillot P, Rabec C, Barnestein R, Tankere P, Giboulot M, Bonniaud P, Georges M. [Diaphragmatic ultrasonography for the pulmonologist: Technique and clinical use]. Rev Mal Respir 2024; 41:1-17. [PMID: 37980184 DOI: 10.1016/j.rmr.2023.10.005] [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: 03/29/2023] [Accepted: 09/29/2023] [Indexed: 11/20/2023]
Abstract
INTRODUCTION Ultrasonography is an emerging tool that helps to assess diaphragmatic function. It is now widely used in ICUs to predict weaning from mechanical ventilation. Ultrasonography is readily available, harmless (no radiation), and repeatable with good interoperator reproducibility. Over the past few years, ultrasonography has seen increasing use in patients with chronic pulmonary pathologies. STATE OF THE ART The aim of this review is (1) to describe the ultrasound techniques used to assess diaphragmatic excursion and thickening, (2) to indicate the expected, normal values in healthy patients, and (3) to summarize the main findings and clinical applications in treatment of chronic respiratory disorders. CONCLUSIONS Chronic pulmonary diseases are associated with diaphragmatic dysfunction that can be assessed with ultrasound. Diaphragmatic dysfunction is primary in neuromuscular disorders and secondary to respiratory disease in other chronic pulmonary conditions (COPD, ILD). Ultrasound is correlated with the severity of the underlying disease (functional and clinical parameters). PERSPECTIVES The prognostic interest of diaphragm ultrasonography remains to be established, after which its utilization should become routine.
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Affiliation(s)
- D Schenesse
- Service de pneumologie et soins intensifs respiratoires, centre de référence des maladies pulmonaires rares de l'adulte, CHU Dijon-Bourgogne, 14, rue Paul-Gaffarel, 21000 Dijon, France
| | - P Mouillot
- Service de pneumologie et soins intensifs respiratoires, centre de référence des maladies pulmonaires rares de l'adulte, CHU Dijon-Bourgogne, 14, rue Paul-Gaffarel, 21000 Dijon, France
| | - C Rabec
- Service de pneumologie et soins intensifs respiratoires, centre de référence des maladies pulmonaires rares de l'adulte, CHU Dijon-Bourgogne, 14, rue Paul-Gaffarel, 21000 Dijon, France
| | - R Barnestein
- Service de pneumologie et soins intensifs respiratoires, centre de référence des maladies pulmonaires rares de l'adulte, CHU Dijon-Bourgogne, 14, rue Paul-Gaffarel, 21000 Dijon, France
| | - P Tankere
- Service de pneumologie et soins intensifs respiratoires, centre de référence des maladies pulmonaires rares de l'adulte, CHU Dijon-Bourgogne, 14, rue Paul-Gaffarel, 21000 Dijon, France
| | - M Giboulot
- Service de pneumologie et soins intensifs respiratoires, centre de référence des maladies pulmonaires rares de l'adulte, CHU Dijon-Bourgogne, 14, rue Paul-Gaffarel, 21000 Dijon, France
| | - P Bonniaud
- Service de pneumologie et soins intensifs respiratoires, centre de référence des maladies pulmonaires rares de l'adulte, CHU Dijon-Bourgogne, 14, rue Paul-Gaffarel, 21000 Dijon, France; Inserm, LNC UMR 1231, LipSTIC LabEx Team, Dijon, France
| | - M Georges
- Service de pneumologie et soins intensifs respiratoires, centre de référence des maladies pulmonaires rares de l'adulte, CHU Dijon-Bourgogne, 14, rue Paul-Gaffarel, 21000 Dijon, France; UMR 6265 CNRS 1234 INRA, centre des sciences du goût et de l'alimentation, université Bourgogne-Franche-Comté, Dijon, France.
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Li C, Liu Y, Dong R, Zhang T, Song Y, Zhang Q. Deep learning radiomics on shear wave elastography and b-mode ultrasound videos of diaphragm for weaning outcome prediction. Med Eng Phys 2024; 123:104090. [PMID: 38365343 DOI: 10.1016/j.medengphy.2023.104090] [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: 11/17/2023] [Accepted: 12/16/2023] [Indexed: 02/18/2024]
Abstract
PURPOSE We proposed an automatic method based on deep learning radiomics (DLR) on shear wave elastography (SWE) and B-mode ultrasound videos of diaphragm for two classification tasks, one for differentiation between the control and patient groups, and the other for weaning outcome prediction. MATERIALS AND METHODS We included a total of 581 SWE and B-mode ultrasound videos, of which 466 were from the control group of 179 normal subjects, and 115 were from the patient group of 35 mechanically ventilated subjects in the intensive care unit (ICU). Among the patient group, 17 subjects successfully weaned and 18 failed. The deep neural network of U-Net was utilized to automatically segment diaphragm regions in dual-modal videos of SWE and B-mode. High-throughput radiomics features were then extracted, the statistical test and least absolute shrinkage and selection operator (LASSO) were applied for feature dimension reduction. The optimal classification models for the two tasks were established using the support vector machine (SVM). RESULTS The automatic segmentation model achieved Dice score of 87.89 %. A total of 4524 radiomics features were extracted, 10 and 20 important features were left after feature dimension reduction for constructing the two classification models. The best areas under receiver operating characteristic curves of the two models reached 84.01 % and 94.37 %, respectively. CONCLUSIONS Our proposed DLR methods are innovative for automatic segmentation of diaphragm regions in SWE and B-mode videos and deep mining of high-throughput radiomics features from dual-modal images. The approaches have been proved to be effective for prediction of weaning outcomes.
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Affiliation(s)
- Changchun Li
- The SMART (Smart Medicine and AI-based Radiology Technology) Lab, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai, China; School of Communication and Information Engineering, Shanghai University, Shanghai, China
| | - Yan Liu
- Department of Ultrasonography, Zhoupu Hospital Affiliated to Shanghai University of Medicine & Health Sciences, Shanghai, China
| | - Rui Dong
- Department of Ultrasonography, Zhoupu Hospital Affiliated to Shanghai University of Medicine & Health Sciences, Shanghai, China
| | - Tianjie Zhang
- Department of Ultrasonography, Zhoupu Hospital Affiliated to Shanghai University of Medicine & Health Sciences, Shanghai, China
| | - Ye Song
- Department of Ultrasonography, Zhoupu Hospital Affiliated to Shanghai University of Medicine & Health Sciences, Shanghai, China.
| | - Qi Zhang
- The SMART (Smart Medicine and AI-based Radiology Technology) Lab, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai, China; School of Communication and Information Engineering, Shanghai University, Shanghai, China.
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Milesi J, Boussuges A, Habert P, Bermudez J, Reynaud-Gaubert M, Delliaux S, Bregeon F, Coiffard B. Ultrasound evaluation of diaphragmatic function in patients with idiopathic pulmonary fibrosis: a retrospective observational study. Respir Res 2023; 24:259. [PMID: 37898765 PMCID: PMC10613389 DOI: 10.1186/s12931-023-02577-1] [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: 06/07/2023] [Accepted: 10/23/2023] [Indexed: 10/30/2023] Open
Abstract
INTRODUCTION The diaphragm function assessed by ultrasound has been well-studied in COPD, asthma, and intensive care. However, there are only a few studies on diffuse interstitial lung disease, while dyspnea and quality of life are major issues in the management that may depend on the diaphragm. METHODS We retrospectively included idiopathic pulmonary fibrosis (IPF) patients followed in our center (Marseille, France) between January 2020 and February 2023 who underwent diaphragmatic ultrasound. Our objectives were to describe the diaphragmatic function of IPFs compared to healthy controls and to correlate with clinical, functional, and lung density on CT-scan. RESULTS 24 IPF patients and 157 controls were included. The diaphragmatic amplitude in IPF was increased at rest (median of 2.20 cm vs 1.88 cm on the right, p < 0.007, and 2.30 cm vs 1.91 cm on the left, p < 0.03, in IPF and controls respectively) and decreased in deep breathing (median of 4.85 cm vs 5.45 cm on the right, p < 0.009, and 5.10 cm vs 5.65 cm on the left, p < 0.046, in IPF and controls respectively). Diaphragmatic thickness was significantly reduced at rest on the right side (median of 1.75 mm vs 2.00 mm, p < 0.02, in IPF and controls respectively) and in deep breathing on both sides compared to controls (mean of 3.82 mm vs 4.15 mm on the right, p < 0.02, and 3.53 mm vs 3.94 mm, on the left, p < 0.009, in IPF and controls respectively). Diaphragmatic amplitude in deep breathing was moderate to strongly correlated with FVC, DLCO, and 6MWT and negatively correlated with the dyspnea and lung density on CT scan. CONCLUSION The diaphragmatic amplitude and thickness were impaired in IPF compared to controls. Diaphragmatic amplitude is the parameter best correlated with clinical, functional, and lung density criteria. Further studies are needed to determine if diaphragmatic amplitude can be a prognostic factor in IPF.
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Affiliation(s)
- Jules Milesi
- Department of Respiratory Medicine and Lung Transplantation, Assistance Publique-Hôpitaux de Marseille (AP-HM), Hôpital Nord, Aix-Marseille University, Chemin des Bourrely, 13015, Marseille, France
| | - Alain Boussuges
- Pulmonary Function Testing Laboratory, APHM, Aix-Marseille University, Marseille, France
| | - Paul Habert
- Department of Radiology, APHM, Aix-Marseille University, Marseille, France
- LIIE, Aix-Marseille University, Marseille, France
- CERIMED, Aix-Marseille University, Marseille, France
| | - Julien Bermudez
- Department of Respiratory Medicine and Lung Transplantation, Assistance Publique-Hôpitaux de Marseille (AP-HM), Hôpital Nord, Aix-Marseille University, Chemin des Bourrely, 13015, Marseille, France
| | - Martine Reynaud-Gaubert
- Department of Respiratory Medicine and Lung Transplantation, Assistance Publique-Hôpitaux de Marseille (AP-HM), Hôpital Nord, Aix-Marseille University, Chemin des Bourrely, 13015, Marseille, France
| | - Stéphane Delliaux
- Pulmonary Function Testing Laboratory, APHM, Aix-Marseille University, Marseille, France
| | - Fabienne Bregeon
- Pulmonary Function Testing Laboratory, APHM, Aix-Marseille University, Marseille, France
| | - Benjamin Coiffard
- Department of Respiratory Medicine and Lung Transplantation, Assistance Publique-Hôpitaux de Marseille (AP-HM), Hôpital Nord, Aix-Marseille University, Chemin des Bourrely, 13015, Marseille, France.
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Wangüemert-Pérez AL, Figueira-Gonçalves JM, Ramallo-Fariña Y, Guanche-Dorta S, Golpe R. Ultrasound assessment of diaphragmatic dynamics in patients with chronic obstructive pulmonary disease after treatment with indacaterol/glycopyrronium. Rev Clin Esp 2023; 223:216-222. [PMID: 36931625 DOI: 10.1016/j.rceng.2023.03.002] [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: 10/02/2022] [Accepted: 01/24/2023] [Indexed: 03/17/2023]
Abstract
INTRODUCTION Air trapping is one of the main determinants of dyspnea in patients with chronic obstructive pulmonary disease (COPD). An increase in air trapping leads to a change in the normal diaphragmatic configuration with associated functional impairment. Said deterioration improves with bronchodilator therapy. Chest ultrasound (CU) has been used to assess changes in diaphragmatic motility after short-acting bronchodilator therapy, but there are no previous studies on these changes after long-acting bronchodilator treatment. MATERIAL AND METHODS Interventional prospective study. Patients with COPD and moderate to very severe ventilatory obstruction were included in the study. Diaphragm motion and thickness were assessed by CU before and after 3 months of treatment with indacaterol/glycopirronium 85/43 mcg. RESULTS Thirty patients were included (56.6% men, mean age: 69.4 ± 6.2 years). Pre- and post-treatment diaphragmatic mobility measured during resting breathing, deep breathing, and nasal sniffing were 19.9 ± 7.1 mm and 26.4 ± 8.7 mm (p < 0.0001); 42.5 ± 14.1 mm and 64.5 ± 25.9 mm (p < 0.0001); and 36.5 ± 17.4 mm and 46.7 ± 18.5 mm (p = 0.012), respectively. A significant improvement was also found in the minimum and maximum diaphragm thickness (p < 0.05), but there were no significant changes in the diaphragmatic shortening fraction after treatment (p = 0.341). CONCLUSIONS Treatment with indacaterol/glycopyrronium 85/43 mcg every 24 hours for 3 months improved diaphragmatic mobility in patients with COPD with moderate to very severe airway obstruction. CU may be useful for assessing the response to treatment in these patients.
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Affiliation(s)
- A L Wangüemert-Pérez
- Servicio de Neumología, Hospital San Juan de Dios Tenerife, Santa Cruz de Tenerife, Spain.
| | - J M Figueira-Gonçalves
- Servicio de Neumología, Hospital Universitario Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Spain; Instituto Universitario de Enfermedades Tropicales y Salud Pública de Canarias, Universidad de La Laguna, Santa Cruz de Tenerife, Spain
| | - Y Ramallo-Fariña
- Foundation of the Canary Islands Health Research Institute (FIISC), Santa Cruz de Tenerife, Spain Health Services Research on Chronic Patients Network (REDISSEC), Madrid, Spain
| | - S Guanche-Dorta
- Servicio de Neumología, Hospital San Juan de Dios Tenerife, Santa Cruz de Tenerife, Spain
| | - R Golpe
- Servicio de Neumología, Hospital Universitario Lucus Augusti, Lugo, Spain
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Valoración ecográfica de la dinámica diafragmática en pacientes con enfermedad pulmonar obstructiva crónica tras tratamiento con indacaterol/glicopirronio. Rev Clin Esp 2023. [DOI: 10.1016/j.rce.2023.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
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Hua-Rong Z, Liang C, Rong L, Yi-Fan T, Dou-Zi S, Yue C, Zu-Lin L. Ultrasonographic evaluation of diaphragm function in patients with chronic obstructive pulmonary disease: A systematic review and meta-analysis. Medicine (Baltimore) 2022; 101:e32560. [PMID: 36595865 PMCID: PMC9794219 DOI: 10.1097/md.0000000000032560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Some studies have reported using ultrasonic evaluations to assess diaphragm function in patients with chronic obstructive pulmonary disease (COPD). However, they have limitations and thus cannot provide strong evidence to support ultrasound evaluations for diaphragm function and dysfunction severity assessments in this patient population. Additionally, quantitative studies on the relationship between ultrasound evaluations and diaphragm function do not exist. Therefore, we performed a systematic review and meta-analysis to explore the usefulness of ultrasonography for evaluating diaphragm function in patients with COPD. METHODS The Cochrane Library, PubMed, Embase, Web of Science, Chinese Biomedical Literature Database, Wanfang Data, China National Knowledge Network, and Chinese Scientific Journal Database (i.e., VIP) databases were searched for literature about ultrasonic evaluations of diaphragm function in patients with COPD for systematic review. We extracted patient demographic, diaphragm mobility, diaphragm thickness, diaphragm thickening score, and other related parameter data using RevMan 5.3 software for the meta-analysis. RESULTS We included 13 articles in the systematic review, 8 of which (494 participants) were included in the meta-analysis. The degree of diaphragm offset in patients with COPD was significantly lower than that in healthy controls (weighted mean difference [WMD] = -1.34; 95% confidence interval [CI]: -2.15, 0.53; P < .05). The diaphragm deviation was lower in the severe COPD group than in the mild-to-moderate COPD group (WMD = 0.50; 95% CI: -0.01, 1.01; P = .06), but the difference was not significant. CONCLUSION Ultrasonography effectively evaluates diaphragm function in patients with COPD. The diaphragm offset can be used as an auxiliary diagnostic index for COPD, which is also related to disease severity.
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Affiliation(s)
- Zeng Hua-Rong
- The First College of Clinical Medical Science, China Three Gorges University & Ultrasound Department of Yichang Central People’s Hospital, Yichang, Hubei, China
| | - Chen Liang
- Yichang Maternal and Child Health Hospital, Yichang, Hubei, China
| | - Liu Rong
- The First College of Clinical Medical Science, China Three Gorges University & Ultrasound Department of Yichang Central People’s Hospital, Yichang, Hubei, China
- * Correspondence: Liu Rong, The First College of Clinical Medical Science, China Three Gorges University & Ultrasound Department of Yichang Central People’s Hospital, Yichang, Hubei 443000, China (e-mail: )
| | - Tu Yi-Fan
- The First College of Clinical Medical Science, China Three Gorges University & Ultrasound Department of Yichang Central People’s Hospital, Yichang, Hubei, China
| | - Shi Dou-Zi
- The First College of Clinical Medical Science, China Three Gorges University & Ultrasound Department of Yichang Central People’s Hospital, Yichang, Hubei, China
| | - Chen Yue
- The First College of Clinical Medical Science, China Three Gorges University & Ultrasound Department of Yichang Central People’s Hospital, Yichang, Hubei, China
| | - Liu Zu-Lin
- The First College of Clinical Medical Science, China Three Gorges University & Ultrasound Department of Yichang Central People’s Hospital, Yichang, Hubei, China
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Wei S, Lu R, Zhang Z, Wang F, Tan H, Wang X, Ma J, Zhang Y, Deng N, Chen J. MRI-assessed diaphragmatic function can predict frequent acute exacerbation of COPD: a prospective observational study based on telehealth-based monitoring system. BMC Pulm Med 2022; 22:438. [PMID: 36424599 PMCID: PMC9685983 DOI: 10.1186/s12890-022-02254-x] [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: 09/01/2022] [Accepted: 11/18/2022] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Acute exacerbations of chronic obstructive pulmonary disease (AECOPD) have considerably high mortality and re-hospitalisation rate. Diaphragmatic dysfunction (DD) is common in COPD patients. However, whether diaphragmatic dysfunction is related to acute exacerbation is yet to be elucidated. This study aimed to evaluate the diaphragm function by magnetic resonance imaging (MRI) in COPD patients and assess whether the impact of DD may help predict AECOPD. METHODS 20 healthy adult volunteers and 80 COPD patients were enrolled. The diaphragms function parameters were accessed by MRI. Patients were guided to start self-management by the Telehealth-based monitoring system following the enrolment. Events of acute exacerbation of COPD were recorded by the system and confirmed by healthcare providers. Binary univariate and multivariate logistic regression analyses were performed to investigate the factors associated with the frequency of AECOPD. Receiver operating characteristic (ROC) curves were further used to assess the value of prediction indexes. RESULTS Fifty-nine COPD patients completed a one-year follow-up based on the Telehealth-based monitoring system. The clinical outcomes showed that the diaphragm function parameters at the end of maximal breathing were lower in the COPD group than in the healthy control group (P < 0.05). ANOVA showed significant differences among Global Initiative for Chronic Obstructive Lung Disease (GOLD) stages for diaphragm function parameters, including chest wall motion, lung area, upper-lower diameter, and the diaphragm thickening fraction at the end of maximal breathing (P < 0.05). Moreover, significant differences in diaphragm function parameters were observed between patients with infrequent AECOPD (n = 28) and frequent AECOPD (n = 31) based on the frequency of AECOPD (P < 0.05). The diaphragm thickening fraction and the chest wall motion were associated with AECOPD after adjusting for age, sex, BMI, and lung functions, and the combination of predictions showed better accuracy in predicting the frequency of AECOPD. CONCLUSIONS In COPD patients, diaphragm function parameters correlate with the severity of airflow limitation. The diaphragm thickening fraction and the chest wall motion were associated with the frequency of AECOPD and can predict it.
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Affiliation(s)
- Shuoshuo Wei
- grid.413385.80000 0004 1799 1445Department of Pulmonary and Critical Care Medicine, General Hospital of Ningxia Medical University, Yongan Lane, Xingqing District, Yinchuan, 750004 Ningxia China ,grid.412194.b0000 0004 1761 9803Ningxia Medical University, Yinchuan, 750004 Ningxia China
| | - Rong Lu
- grid.413385.80000 0004 1799 1445Department of Pulmonary and Critical Care Medicine, General Hospital of Ningxia Medical University, Yongan Lane, Xingqing District, Yinchuan, 750004 Ningxia China ,Department of Pulmonary Medicine, People’s Hospital of Wuzhong, Wuzhong, 751100 Ningxia China
| | - Zhengping Zhang
- grid.413385.80000 0004 1799 1445Department of Radiology, General Hospital of Ningxia Medical University, Yinchuan, 750004 Ningxia China
| | - Faxuan Wang
- grid.412194.b0000 0004 1761 9803Ningxia Medical University, Yinchuan, 750004 Ningxia China ,grid.412194.b0000 0004 1761 9803School of Public Health and Management, Ningxia Medical University, Yinchuan, China
| | - Hai Tan
- grid.413385.80000 0004 1799 1445Department of Pulmonary and Critical Care Medicine, General Hospital of Ningxia Medical University, Yongan Lane, Xingqing District, Yinchuan, 750004 Ningxia China
| | - Xiaohong Wang
- grid.413385.80000 0004 1799 1445Department of Critical Care Medicine, General Hospital of Ningxia Medical University, Yinchuan, 750004 Ningxia China
| | - Jinlan Ma
- grid.413385.80000 0004 1799 1445Department of Critical Care Medicine, General Hospital of Ningxia Medical University, Yinchuan, 750004 Ningxia China
| | - Yating Zhang
- grid.413385.80000 0004 1799 1445Department of Pulmonary and Critical Care Medicine, General Hospital of Ningxia Medical University, Yongan Lane, Xingqing District, Yinchuan, 750004 Ningxia China
| | - Ning Deng
- grid.13402.340000 0004 1759 700XMinistry of Education Key Laboratory of Biomedical Engineering, College of Biomedical Engineering and Instrument Science, Zhejiang University, 38 Zheda Road, Hangzhou, 310027 Zhejiang China
| | - Juan Chen
- grid.413385.80000 0004 1799 1445Department of Pulmonary and Critical Care Medicine, General Hospital of Ningxia Medical University, Yongan Lane, Xingqing District, Yinchuan, 750004 Ningxia China
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11
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Efficacy of Phase II Remote Home Rehabilitation in Patients with Acute Myocardial Infarction after Percutaneous Coronary Intervention. CONTRAST MEDIA & MOLECULAR IMAGING 2022; 2022:4634769. [PMID: 35815057 PMCID: PMC9208999 DOI: 10.1155/2022/4634769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/19/2022] [Accepted: 05/06/2022] [Indexed: 11/26/2022]
Abstract
Objective To assess the efficacy of home-based cardiac rehabilitation and traditional outpatient rehabilitation in stage II after percutaneous coronary intervention (PCI) in patients with acute myocardial infarction (AMI). Methods From September 2019 to March 2020, 80 AMI patients in Cangzhou Central Hospital were randomly assigned to one of the two groups: the control group or the observation group, 40 cases in each group. The control group received old-fashioned outpatient rehabilitation treatment, and the study group received long-distance family rehabilitation nursing intervention. The blood pressure, examination results, compliance, satisfaction evaluation, incidence of cardiac events, heart rate, quality of life score, and 6-minute walking test were compared between the two groups. Results There were no deaths in both groups. There were significant differences in heart failure, unstable angina pectoris, unplanned readmission rate, walking compliance, and 6-minute walking test at 6 months after discharge (P < 0.05). There were substantial variances in left ventricular discharge portion, low-density lipoprotein, medication compliance, satisfaction, and quality of life (P < 0.05); there was substantial inconsistency in the 6-minute walking test concerning the two groups afterwards discharge for 3 months (P < 0.05). Conclusion Home rehabilitation is a new home cardiac rehabilitation model with high efficiency, convenience, and whole process monitoring and barrier-free follow-up management. It can effectively improve the cardiac function, workout patience and worth of life expectancy of victims with AMI, improve their self-management awareness and rehabilitation compliance, reduce the risk of cardiac events, and have a positive impact on the prognosis and rehabilitation of patients with AMI.
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12
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Jia Y, Zhang Q. Research Progress on Diaphragm Ultrasound in Chronic Obstructive Pulmonary Disease: A Narrative Review. ULTRASOUND IN MEDICINE & BIOLOGY 2022; 48:587-597. [PMID: 35065813 DOI: 10.1016/j.ultrasmedbio.2021.10.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 09/28/2021] [Accepted: 10/28/2021] [Indexed: 06/14/2023]
Abstract
Chronic obstructive pulmonary disease (COPD) is a common disease of the respiratory system, and its prevalence and mortality remain high. COPD results in continuous impairment of lung function, which severely affects the patient's work and life. In severe cases, there will be acute respiratory failure, which endangers the lives of patients, and respiratory muscle dysfunction is one of the main reasons for this result. As the diaphragm is the most important inspiratory muscle, its dysfunction has a great impact on the deterioration of respiratory function in COPD patients. With the development of ultrasound, more and more studies have found that diaphragm ultrasound can play an important role in the diagnosis and treatment of COPD patients. The main purpose of this article is to review the research progress on diaphragm ultrasound in COPD and briefly introduce diaphragmatic ultrasound examination methods.
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Affiliation(s)
- Yuhao Jia
- Department of Ultrasound, Second Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Qunxia Zhang
- Department of Ultrasound, Second Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China.
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13
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Chen Y, Li P, Wang J, Wu W, Liu X. Assessments and Targeted Rehabilitation Therapies for Diaphragmatic Dysfunction in Patients with Chronic Obstructive Pulmonary Disease: A Narrative Review. Int J Chron Obstruct Pulmon Dis 2022; 17:457-473. [PMID: 35273448 PMCID: PMC8902058 DOI: 10.2147/copd.s338583] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 02/08/2022] [Indexed: 11/23/2022] Open
Abstract
Purpose This review summarizes the characteristics, assessment methods, and targeted rehabilitation therapies of diaphragm dysfunction in patients with chronic obstructive pulmonary disease (COPD). Methods Extensive literature was searched in PubMed, the Cochrane Library, Web of Science, Chinese National Knowledge Infrastructure Database, Wanfang, and SinoMed. Results Under the influence of oxidative stress, inflammation, and other factors, the diaphragm function of patients with COPD changes in mobility, muscle strength, thickness, and thickening. In patients with COPD, diaphragm mobility can be assessed using ultrasound, X-ray fluoroscopy, and magnetic resonance imaging. Diaphragmatic strength can be measured by transdiaphragmatic pressure and maximal inspiratory pressure. Diaphragmatic thickness and thickening can be assessed using ultrasound. Rehabilitation therapies targeting the diaphragm include diaphragmatic breathing, diaphragm-related manual therapy, and phrenic nerve electrical stimulation. Diaphragmatic breathing is safe, simple, and not limited by places. Diaphragmatic manual therapies, which require patient cooperation and one-on-one operation by a professional therapist, are effective. Phrenic nerve electrical stimulation is suitable for patients with severe conditions. These therapies improve the diaphragmatic function, lung function, dyspnea, and exercise capacity of patients with COPD. Conclusion The diaphragmatic function is commonly assessed in terms of mobility, strength, thickness, and thickening. Diaphragmatic targeted rehabilitation therapies have proven to be efficient, which are recommended to be included in the pulmonary rehabilitation strategy for patients with COPD.
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Affiliation(s)
- Yanjun Chen
- Department of Sports Rehabilitation, Shanghai University of Sport, Shanghai, People’s Republic of China
| | - Peijun Li
- Department of Sports Rehabilitation, Shanghai University of Sport, Shanghai, People’s Republic of China
| | - Jie Wang
- School of Physical Education and Sport Training, Shanghai University of Sport, Shanghai, People’s Republic of China
- Jie Wang, School of Physical Education and Sport Training, Shanghai University of Sport, Chang Hai Road No. 399, Yang Pu District, Shanghai, People’s Republic of China, Tel +86-18817581075, Email
| | - Weibing Wu
- Department of Sports Rehabilitation, Shanghai University of Sport, Shanghai, People’s Republic of China
| | - Xiaodan Liu
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of China
- Correspondence: Xiaodan Liu, School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, Cailun Road No. 300, Pudong New District, Shanghai, People’s Republic of China, Tel +86-15800668700; +86-21-58323158, Email
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14
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Gabrysz-Forget F, Maynard-Paquette AC, Kharat A, Tremblay F, Silviet-Carricart M, Lavoie A, Girard M, Dubé BP. Ultrasound-Derived Diaphragm Contractile Reserve as a Marker of Clinical Status in Patients With Cystic Fibrosis. Front Physiol 2022; 12:808770. [PMID: 35082696 PMCID: PMC8784523 DOI: 10.3389/fphys.2021.808770] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 12/13/2021] [Indexed: 11/13/2022] Open
Abstract
Introduction: In patients with cystic fibrosis (CF), the monitoring of respiratory muscle activity using electromyography can provide information on the demand-to-capacity ratio of the respiratory system and act as a clinical marker of disease activity, but this technique is not adapted to routine clinical care. Ultrasonography of the diaphragm could provide an alternative, simpler and more widely available alternative allowing the real-time assessment of the diaphragm contractile reserve (DCR), but its relationship with recognized markers of disease severity and clinical outcomes are currently unknown. Methods: Stable patients with CF were prospectively recruited. Diaphragm ultrasound was performed and compared to forced expiratory volume in 1 s (FEV1), residual volume (RV), handgrip strength, fat-free mass index (FFMI), serum vitamin levels, dyspnea levels and rate of acute exacerbation (AE). Diaphragm activity was reported as DCR (the ratio of tidal-to-maximal thickening fractions, representing the remaining diaphragm contractility available after tidal inspiration) and TFmax (representing maximal diaphragm contractile strength). Inter-observer reliability of the measurement of DCR was evaluated using intra-class correlation analysis. Results: 110 patients were included [61 males, median (interquartile range), age 31 (27–38) years, FEV1 66 (46–82)% predicted]. DCR was significantly correlated to FEV1 (rho = 0.46, p < 0.001), RV (rho = −0.46, p < 0.001), FFMI (rho = 0.41, p < 0.001), and handgrip strength (rho = 0.22, p = 0.02), but TFmax was not. In a multiple linear regression analysis, both RV and FFMI were independent predictors of DCR. DCR, but not TFmax, was statistically lower in patients with > 2 exacerbations/year (56 ± 25 vs. 71 ± 17%, p = 0.001) and significantly lower with higher dyspnea levels. A ROC analysis showed that DCR performed better than FEV1 (mean difference in AUROC 0.09, p = 0.04), RV (mean difference in AUROC 0.11, p = 0.03), and TFmax at identifying patients with an mMRC score > 2. Inter-observer reliability of DCR was high (ICC = 0.89, 95% CI 0.84–0.92, p < 0.001). Conclusion: In patients with CF, DCR is a reliable and non-invasive marker of disease severity that is related to respiratory and extra-pulmonary manifestations of the disease and to clinical outcomes. Future studies investigating the use of DCR as a longitudinal marker of disease progression, response to interventions or target for therapy would further validate its translation into clinical practice.
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Affiliation(s)
- Fanny Gabrysz-Forget
- Département de Médecine, Centre Hospitalier de l'Université de Montréal (CHUM), Montréal, QC, Canada
| | | | - Aileen Kharat
- Département de Médecine, Centre Hospitalier de l'Université de Montréal (CHUM), Montréal, QC, Canada
| | - François Tremblay
- Département de Médecine, Service de Pneumologie, Centre Hospitalier de l'Université de Montréal (CHUM), Montréal, QC, Canada
| | - Maité Silviet-Carricart
- Département de Médecine, Service de Pneumologie, Centre Hospitalier de l'Université de Montréal (CHUM), Montréal, QC, Canada
| | - Annick Lavoie
- Département de Médecine, Service de Pneumologie, Centre Hospitalier de l'Université de Montréal (CHUM), Montréal, QC, Canada
| | - Martin Girard
- Département de Médecine, Centre Hospitalier de l'Université de Montréal (CHUM), Montréal, QC, Canada.,Département de Médecine, Service de Pneumologie, Centre Hospitalier de l'Université de Montréal (CHUM), Montréal, QC, Canada.,Département d'Anesthésiologie, Centre Hospitalier de l'Université de Montréal (CHUM), Montréal, QC, Canada
| | - Bruno-Pierre Dubé
- Département de Médecine, Centre Hospitalier de l'Université de Montréal (CHUM), Montréal, QC, Canada.,Département de Médecine, Service de Pneumologie, Centre Hospitalier de l'Université de Montréal (CHUM), Montréal, QC, Canada.,Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Carrefour de l'Innovation et de l'Évaluation en Santé, Montréal, QC, Canada
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15
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An TJ, Yoo YJ, Lim JU, Seo W, Park CK, Rhee CK, Yoon HK. Diaphragm Ultrasound is an Imaging Biomarker that Distinguishes Exacerbation Status from Stable Chronic Obstructive Pulmonary Disease. Int J Chron Obstruct Pulmon Dis 2022; 17:3-12. [PMID: 35018095 PMCID: PMC8742578 DOI: 10.2147/copd.s341484] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 12/21/2021] [Indexed: 12/18/2022] Open
Abstract
Background Evaluating the diaphragm muscle in chronic obstructive pulmonary disease (COPD) is important. However, the role of diaphragm ultrasound (DUS) in distinguishing the exacerbation status of COPD (AECOPD) is not fully understood. We set this study to evaluate the role of DUS as a biomarker for distinguishing the AECOPD. Methods COPD patients who underwent DUS were enrolled between March 2020 and November 2020. The diaphragm thickening fraction (TFmax) and diaphragm excursion (DEmax) during maximal deep breathing were measured. Patients were divided into exacerbation and stable groups. Demographics, lung function, and DUS findings were compared between the two groups. Receiver operating characteristic curve and univariate/multivariate logistic regression analyses were performed. Results Fifty-five patients were enrolled. The exacerbation group had a lower body mass index (BMI) (20.9 vs 24.2, p = 0.003), lower TFmax (94.8 ± 8.2% vs 158.4 ± 83.5%, p = 0.010), and lower DEmax (30.8 ± 11.1 mm vs 40.5 ± 12.5 mm, p = 0.007) compared to stable group. The areas under the TFmax (0.745) and DEmax (0.721) curves indicated fair results for distinguishing AECOPD. The patients were divided into low and high TFmax and DEmax groups based on calculated cut-off values. Low TFmax (odds ratio [OR] 8.40; 95% confidence interval [CI] 1.55–45.56) and low DEmax (OR 11.51; 95% CI 1.15–115.56) were associated with AECOPD after adjusting for age, sex, BMI, and lung functions. Conclusion DUS showed the possibility of an imaging biomarker distinguishing AECOPD from stable status.
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Affiliation(s)
- Tai Joon An
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Yeun Jie Yoo
- Department of Rehabilitation Medicine, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Suwon, Korea
| | - Jeong Uk Lim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Wan Seo
- Department of Internal Medicine, St. Peter's Hospital, Seoul, Korea
| | - Chan Kwon Park
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Chin Kook Rhee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hyoung Kyu Yoon
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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16
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Ritchie AI, Baker JR, Parekh TM, Allinson JP, Bhatt SP, Donnelly LE, Donaldson GC. Update in Chronic Obstructive Pulmonary Disease 2020. Am J Respir Crit Care Med 2021; 204:14-22. [PMID: 33856972 DOI: 10.1164/rccm.202102-0253up] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Andy I Ritchie
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Jonathon R Baker
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Trisha M Parekh
- Division of Pulmonary, Allergy and Critical Care Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
| | - James P Allinson
- National Heart and Lung Institute, Imperial College London, London, United Kingdom.,Royal Brompton Hospital, Royal Brompton and Harefield National Health Service Foundation Trust, London, United Kingdom
| | - Surya P Bhatt
- Division of Pulmonary, Allergy and Critical Care Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
| | - Louise E Donnelly
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Gavin C Donaldson
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
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