Relevant bibliographies by topics / Emphysema, Pulmonary Pathophysiology

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Academic literature on the topic 'Emphysema, Pulmonary Pathophysiology'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "Emphysema, Pulmonary Pathophysiology"

1

Jonathan, Steven, Triya Damayanti, and Budhi Antariksa. "Pathophysiology of Emphysema." Jurnal Respirologi Indonesia 39, no. 1 (January 2, 2019): 60–69. http://dx.doi.org/10.36497/jri.v39i1.43.

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Pulmonary emphysema is part of pathological condition in chronic obstructive pulmonary disease (COPD) which is characterized by lung parenchymal destruction. Morphology classification of emphysema had been made according to histologic structure in pathology. There were some causes known to be the culprit of emphysema; one that caught most attention is protease-antiprotease activity from cigarette smoke exposure. Destructive effect of emphysema gives disturbance of lung function in expiration (obstruction). The primary mechanism is elastic recoil reduction which causes air trapping, lung volume increase, lung compliance increase and airways that is susceptible to collapse. Hyperinflation in emphysema causes some disadvantages which complicate inspiration and give a dyspnea sensation. Equal pressure point drop in emphysema happens because of elastic recoil reduction. This drop may cause early airway closure. (J Respir Indo 2019; 39(1): 60-9)
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2

Amariei, Diana E., Neal Dodia, Janaki Deepak, Stella E. Hines, Jeffrey R. Galvin, Sergei P. Atamas, and Nevins W. Todd. "Combined Pulmonary Fibrosis and Emphysema: Pulmonary Function Testing and a Pathophysiology Perspective." Medicina 55, no. 9 (September 10, 2019): 580. http://dx.doi.org/10.3390/medicina55090580.

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Combined pulmonary fibrosis and emphysema (CPFE) has been increasingly recognized over the past 10–15 years as a clinical entity characterized by rather severe imaging and gas exchange abnormalities, but often only mild impairment in spirometric and lung volume indices. In this review, we explore the gas exchange and mechanical pathophysiologic abnormalities of pulmonary emphysema, pulmonary fibrosis, and combined emphysema and fibrosis with the goal of understanding how individual pathophysiologic observations in emphysema and fibrosis alone may impact clinical observations on pulmonary function testing (PFT) patterns in patients with CPFE. Lung elastance and lung compliance in patients with CPFE are likely intermediate between those of patients with emphysema and fibrosis alone, suggesting a counter-balancing effect of each individual process. The outcome of combined emphysema and fibrosis results in higher lung volumes overall on PFTs compared to patients with pulmonary fibrosis alone, and the forced expiratory volume in one second (FEV1)/forced vital capacity (FVC) ratio in CPFE patients is generally preserved despite the presence of emphysema on chest computed tomography (CT) imaging. Conversely, there appears to be an additive deleterious effect on gas exchange properties of the lungs, reflecting a loss of normally functioning alveolar capillary units and effective surface area available for gas exchange, and manifested by a uniformly observed severe reduction in the diffusing capacity for carbon monoxide (DLCO). Despite normal or only mildly impaired spirometric and lung volume indices, patients with CPFE are often severely functionally impaired with an overall rather poor prognosis. As chest CT imaging continues to be a frequent imaging modality in patients with cardiopulmonary disease, we expect that patients with a combination of pulmonary emphysema and pulmonary fibrosis will continue to be observed. Understanding the pathophysiology of this combined process and the abnormalities that manifest on PFT testing will likely be helpful to clinicians involved with the care of patients with CPFE.
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3

Keller, Cesar A. "Pathophysiology and classification of emphysema." Chest Surgery Clinics of North America 13, no. 4 (November 2003): 589–613. http://dx.doi.org/10.1016/s1052-3359(03)00092-9.

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4

Gronbach, Judith, Harald Ehrhardt, Klaus-Peter Zimmer, and Markus Waitz. "Early Pulmonary Interstitial Emphysema in Preterm Neonates—Respiratory Management and Case Report in Nonventilated Very Low Birth Weight Twins." American Journal of Perinatology Reports 08, no. 02 (April 2018): e99-e105. http://dx.doi.org/10.1055/s-0038-1648253.

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AbstractEarly pulmonary interstitial emphysema in extreme preterm neonates is closely linked with respiratory distress syndrome and exposure to mechanical ventilation. In severe cases, maintaining adequate gas exchange aiming to avoid further lung damage and other neonatal morbidities associated with systemic/pulmonary hypoperfusion, prolonged hypoxia, and respiratory acidosis can be challenging and requires in-depth knowledge into the pathophysiology of the disease. Herein, we report on very low birth weight twins who developed early pulmonary interstitial emphysema during noninvasive respiratory support. We further review the current evidence from the literature, specifically addressing on possible preventive measures and the respiratory management options of this acute pulmonary disease in high-risk neonates.
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5

Portillo, Karina, and Josep Morera. "Combined Pulmonary Fibrosis and Emphysema Syndrome: A New Phenotype within the Spectrum of Smoking-Related Interstitial Lung Disease." Pulmonary Medicine 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/867870.

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Combined pulmonary fibrosis and emphysema (CPFE) is a recently defined syndrome, in which centrilobular and/or paraseptal emphysemas in upper lung zones coexist with pulmonary fibrosis in lower lobes in individuals. These patients have a characteristic lung function profile, with unexpected subnormal dynamic and static lung volumes, contrasting with a significant reduction of carbon monoxide transfer (DLco) and exercise hypoxemia. Pulmonary hypertension is highly prevalent in CPFE and is the leading determinant of death. Tobacco smoking has been proposed as the main factor in its etiology, though the pathophysiology and its natural history remain to be determined. High-resolution computed axial tomography is the mandatory tool to confirm the diagnosis. Currently, there is no consensus about its treatment since those published to date on this issue are limited to well-characterised series of cases; hence, a better understanding of this entity may help in the development of future therapeutic approaches.
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6

Lilburn, David M. L., Clémentine Lesbats, Joseph S. Six, Eric Dubuis, Liang Yew-Booth, Dominick E. Shaw, Maria G. Belvisi, Mark A. Birrell, Galina E. Pavlovskaya, and Thomas Meersmann. "Hyperpolarized 83 Kr magnetic resonance imaging of alveolar degradation in a rat model of emphysema." Journal of The Royal Society Interface 12, no. 107 (June 2015): 20150192. http://dx.doi.org/10.1098/rsif.2015.0192.

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Hyperpolarized 83 Kr surface quadrupolar relaxation (SQUARE) generates MRI contrast that was previously shown to correlate with surface-to-volume ratios in porous model surface systems. The underlying physics of SQUARE contrast is conceptually different from any other current MRI methodology as the method uses the nuclear electric properties of the spin I = 9/2 isotope 83 Kr. To explore the usage of this non-radioactive isotope for pulmonary pathophysiology, MRI SQUARE contrast was acquired in excised rat lungs obtained from an elastase-induced model of emphysema. A significant 83 Kr T 1 relaxation time increase in the SQUARE contrast was found in the elastase-treated lungs compared with the baseline data from control lungs. The SQUARE contrast suggests a reduction in pulmonary surface-to-volume ratio in the emphysema model that was validated by histology. The finding supports usage of 83 Kr SQUARE as a new biomarker for surface-to-volume ratio changes in emphysema.
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7

Kozma, Rodrigo de las Heras, Edson Marcelino Alves, Valter Abraao Barbosa-de-Oliveira, Fernanda Degobbi Tenorio Quirino dos Santos Lopes, Renan Cenize Guardia, Henrique Vivi Buzo, Carolina Arruda de Faria, et al. "A new experimental model of cigarette smoke-induced emphysema in Wistar rats." Jornal Brasileiro de Pneumologia 40, no. 1 (January 2014): 46–54. http://dx.doi.org/10.1590/s1806-37132014000100007.

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OBJECTIVE: To describe a new murine model of cigarette smoke-induced emphysema. METHODS: Twenty-four male Wistar rats were divided into two groups: the cigarette smoke group, comprising 12 rats exposed to smoke from 12 commercial filter cigarettes three times a day (a total of 36 cigarettes per day) every day for 30 weeks; and the control group, comprising 12 rats exposed to room air three times a day every day for 30 weeks. Lung function was assessed by mechanical ventilation, and emphysema was morphometrically assessed by measurement of the mean linear intercept (Lm). RESULTS: The mean weight gain was significantly (approximately ten times) lower in the cigarette smoke group than in the control group. The Lm was 25.0% higher in the cigarette smoke group. There was a trend toward worsening of lung function parameters in the cigarette smoke group. CONCLUSIONS: The new murine model of cigarette smoke-induced emphysema and the methodology employed in the present study are effective and reproducible, representing a promising and economically viable option for use in studies investigating the pathophysiology of and therapeutic approaches to COPD.
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8

Cappetta, Donato, Antonella De Angelis, Giuseppe Spaziano, Gioia Tartaglione, Elena Piegari, Grazia Esposito, Loreta Pia Ciuffreda, et al. "Lung Mesenchymal Stem Cells Ameliorate Elastase-Induced Damage in an Animal Model of Emphysema." Stem Cells International 2018 (2018): 1–10. http://dx.doi.org/10.1155/2018/9492038.

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Pulmonary emphysema is a respiratory condition characterized by alveolar destruction that leads to airflow limitation and reduced lung function. Although with extensive research, the pathophysiology of emphysema is poorly understood and effective treatments are still missing. Evidence suggests that mesenchymal stem cells (MSCs) possess the ability to engraft the injured tissues and induce repair via a paracrine effect. Thus, the aim of this study was to test the effects of the intratracheal administration of lung-derived mouse MSCs in a model of elastase-induced emphysema. Pulmonary function (static lung compliance) showed an increased stiffness induced by elastase, while morphometric findings (mean linear intercept and tissue/alveolar area) confirmed the severity of alveolar disruption. Contrarily, MSC administration partially restored lung elasticity and alveolar architecture. In the absence of evidence that MSCs acquired epithelial phenotype, we detected an increased proliferative activity of aquaporin 5- and surfactant protein C-positive lung cells, suggesting MSC-driven paracrine mechanisms. The data indicate the mediation of hepatocyte growth factor in amplifying MSC-driven tissue response after injury. Our study shed light on supportive properties of lung-derived MSCs, although the full identification of mechanisms orchestrated by MSCs and responsible for epithelial repair after injury is a critical aspect yet to be achieved.
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9

Ingenito, Edward P., Larry W. Tsai, Arnab Majumdar, and Bela Suki. "On the Role of Surface Tension in the Pathophysiology of Emphysema." American Journal of Respiratory and Critical Care Medicine 171, no. 4 (February 15, 2005): 300–304. http://dx.doi.org/10.1164/rccm.200406-770pp.

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10

Sasaki, Mamoru, Shotaro Chubachi, Naofumi Kameyama, Minako Sato, Mizuha Haraguchi, Masaki Miyazaki, Saeko Takahashi, and Tomoko Betsuyaku. "Evaluation of cigarette smoke-induced emphysema in mice using quantitative micro-computed tomography." American Journal of Physiology-Lung Cellular and Molecular Physiology 308, no. 10 (May 15, 2015): L1039—L1045. http://dx.doi.org/10.1152/ajplung.00366.2014.

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Chronic cigarette smoke (CS) exposure provokes variable changes in the lungs, and emphysema is an important feature of chronic obstructive pulmonary disease. The usefulness of micro-computed tomography (CT) to assess emphysema in different mouse models has been investigated, but few studies evaluated the dynamic structural changes in a CS-induced emphysema mouse model. A novel micro-CT technique with respiratory and cardiac gating has resulted in high-quality images that enable processing for further quantitative and qualitative analyses. Adult female C57BL/6J mice were repeatedly exposed to mainstream CS, and micro-CT scans were performed at 0, 4, 12, and 20 wk. Emphysema was also histologically quantified at each time point. Air-exposed mice and mice treated with intratracheal elastase served as controls and comparisons, respectively. End-expiratory lung volume, corresponding to functional residual volume, was defined as the calculated volume at the phase of end-expiration, and it evaluated air trapping. The end-expiratory lung volumes of CS-exposed mice were significantly larger than those of air controls at 12 and 20 wk, which was in line with alveolar enlargement and destruction by histological quantification. However, CS exposure neither increased low attenuation volume nor decreased the average lung CT value at any time point, unlike the elastase-instilled emphysema model. CS-exposed mice had rather higher average lung CT values at 4 and 12 wk. This is the first study characterizing a CS-induced emphysema model on micro-CT over time in mice. Moreover, these findings extend our understanding of the distinct pathophysiology of CS-induced emphysema in mice.
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Dissertations / Theses on the topic "Emphysema, Pulmonary Pathophysiology"

1

Walsh, Robert Leo. "Leukocyte elastase and anti-elastases in pulmonary emphysema." Title page, contents and abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09PH/09phw2261.pdf.

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Includes bibliographical references (leaves 218-249) The preferred theory to explain the aetiology of emphysema points to an imbalance in the protease-antiprotease systems within the lung with human leukocyte elastase and [alpha]1-protease inhibiter being the main candidates. Examines some aspects of this theory.
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Books on the topic "Emphysema, Pulmonary Pathophysiology"

1

1926-, Grassi Carlo, and Workshop "Update in Biochemistry of Pulmonary Emphysema" (1990 : Pavia, Italy), eds. Biochemistry of pulmonary emphysema. London: Springer-Verlag, 1992.

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2

Weinbaum, George, Ralph E. Giles, and Robert D. Krell. Pulmonary emphysema : The rationale for therapeutic intervention. New York Academy of Sciences, 1991.

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3

George, Weinbaum, Giles Ralph E, Krell Robert D, New York Academy of Sciences., and American Thoracic Society, eds. Pulmonary emphysema: The rationale for therapeutic intervention. New York, N.Y: New York Academy of Sciences, 1991.

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4

(Designer), R. Corsico, and C. Grassi (Editor), eds. Biochemistry Of Pulmonary Emphysema (Current Topics in Rehabilitation)). Springer, 1993.

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5

Weinbaum, George, and Ralph E. Giles. Pulmonary Emphysema: The Rationale for Therapeutic Intervention (Annals of the New York Academy of Sciences). New York Academy of Sciences, 1991.

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6

Nutrition and ventilatory function (Current topics in rehabilitation). Bi & Gi Publishers, 1992.

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