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L'essentiel de la littérature réçente en Pneumologie

Dans cette rubrique on vous propose une revue de la littérature à travers une sélection d'abstracts d'articles originaux.
On essaiera de vous tenir informé des dernières nouveautés de recherche en matière de Pneumologie. On ne vous fournit que le résumé de l'article et le lien correspondant, pour accéder à l'article en full text vous devez être inscrits à la revue correspondante.
Cliquez ici pour consulter la liste des revues de Pneumologie disponibles en libre accès.



Clinical significance of respiratory virus detection in patients with acute exacerbation of interstitial lung diseases. Imprimer Envoyer
Mercredi, 07 Mars 2018 07:10
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Clinical significance of respiratory virus detection in patients with acute exacerbation of interstitial lung diseases.

Respir Med. 2018 Mar;136:88-92

Authors: Saraya T, Kimura H, Kurai D, Tamura M, Ogawa Y, Mikura S, Sada M, Oda M, Watanabe T, Ohkuma K, Inoue M, Honda K, Watanabe M, Yokoyama T, Fujiwara M, Ishii H, Takizawa H

Abstract
BACKGROUND: The impact of viral infections on acute exacerbations in idiopathic pulmonary fibrosis (IPF) and/or non-IPF interstitial lung disease (ILDs) has been scarcely described.
OBJECTIVES: To elucidate the frequency of virus infections in patients with IPF or non-IPF ILDs including idiopathic interstitial pneumonia (IIP) or connective tissue disease (CTD)-associated pneumonia, and its influence on their short-term mortality.
METHODS: We prospectively enrolled adult patients with acute exacerbation of IPF and non-IPF ILDs who were admitted to the hospital during the last 3 years, and examined the respiratory samples obtained from nasopharyngeal, sputum, and bronchoalveolar lavage fluid.
RESULTS: A total of 78 patients were identified, consisting of 27 patients with acute exacerbation of IPF and 51 patients with non-IPF ILDs (IIP: n = 27, CTD-associated IP: n = 24). Of all patients, 15 (19.2%) had viruses detected in their respiratory samples including the human herpesvirus 7 (HHV7; n = 4) and cytomegalovirus (CMV) plus HHV7 (n = 3). The proportion of virus infections in the IPF and non-IPF ILDs groups was comparable. The Kaplan-Meier survival curves over 60 days revealed a lower survival probability in the virus positive group (n = 15, 60%) than in the virus negative group (n = 60, 83.3%, p < 0.05). However, the virus infection itself could not predict the 60-day survival probability using simple logistic regression analysis.
CONCLUSIONS: Viral infections, mostly CMV or HHV7, were identified in both patients with acute exacerbation of IPF and non-IPF ILDs, but the clinical significance on short-term mortality or isolation itself from respiratory samples remains to be determined.

PMID: 29501253 [PubMed - in process]

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Evaluation of criteria for clinical control in a prospective, international, multicenter study of patients with COPD. Imprimer Envoyer
Mercredi, 07 Mars 2018 07:09
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Evaluation of criteria for clinical control in a prospective, international, multicenter study of patients with COPD.

Respir Med. 2018 Mar;136:8-14

Authors: Miravitlles M, Sliwinski P, Rhee CK, Costello RW, Carter V, Tan J, Lapperre TS, Alcazar B, Gouder C, Esquinas C, García-Rivero JL, Kemppinen A, Tee A, Roman-Rodríguez M, Soler-Cataluña JJ, Price DB

Abstract
BACKGROUND: The concept of clinical control in COPD has been developed to help in treatment decisions, but it requires validation in prospective studies.
METHOD: This international, multicenter, prospective study aimed to validate the concept of control in COPD [control = stability (no exacerbations or impairment in CAT scores) + low impact (low level of symptoms)]. Data from the screening visit was used to: investigate the level of control, compare characteristics of patients according to the control status, and perform a sensitivity analysis of the levels of control using either clinical criteria or questionnaires (COPD Assessment Test -CAT- or Clinical COPD Questionnaire -CCQ-).
RESULTS: A total of 314 patients were analysed, mean age was 68.5 years and mean FEV1 was 52.6% of predicted. According to the prespecified criteria 21% of patients were classified as controlled, all of them with mild/moderate COPD (Body mass index, Obstruction, Dyspnea and Exacerbations, -BODEx-index <5). A high level of dyspnea, a high CAT score or an exacerbation in the previous 3 months were found, using univariate analysis, to be the main reasons for patients not being classified as controlled. Multivariate analysis showed that female sex, chronic bronchitis and having exacerbations in the previous year were associated with uncontrolled COPD. Changing the severity cut off of BODEx from 5 to 3 did not change significantly the percentage of patients fulfilling the criteria of control.
CONCLUSIONS: The proposed criteria of control were only fulfilled by 21% of patients. The suggested cut offs and their predictive value for poor outcomes need to be refined in prospective studies.

PMID: 29501251 [PubMed - in process]

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Favorable longitudinal change of lung function in patients with asthma-COPD overlap from a COPD cohort. Imprimer Envoyer
Mercredi, 07 Mars 2018 07:09
Related Articles

Favorable longitudinal change of lung function in patients with asthma-COPD overlap from a COPD cohort.

Respir Res. 2018 Mar 02;19(1):36

Authors: Park HY, Lee SY, Kang D, Cho J, Lee H, Lim SY, Yoon HI, Ra SW, Kim KU, Oh YM, Sin DD, Lee SD, Park YB

Abstract
BACKGROUND: The recognition of asthma-chronic obstructive pulmonary disease (COPD) overlap (ACO) as a distinct phenotype of COPD or asthma has increased. Although ACO has worse clinical features than non-ACO COPD, limited information is available on long-term outcomes of lung function decline for ACO and non-ACO COPD.
METHODS: COPD patients with at least 3 years of follow-up were selected from the Korean Obstructive Lung Disease cohort. ACO was defined based on 3 major criteria: 1) airflow limitation in individuals 40 years of age and older, 2) ≥10 pack-years of smoking history, and 3) a history of asthma or bronchodilator response of > 400 mL in forced expiratory volume in 1 s (FEV1) at baseline; and at least 1 minor criterion: 1) history of atopy or allergic rhinitis, 2) two separated bronchodilator responses of ≥12% and 200 mL in FEV1, or 3) peripheral blood eosinophils ≥300 cells/μL. Lung function decline was compared using a linear mixed effects model for longitudinal data with random intercept and random slope.
RESULTS: Among 239 patients, 47 were diagnosed with ACO (19.7%). During the follow-up period, change in smoking status, use of inhaled corticosteroids (ICS) and long-acting β2-agonists or ICS and at least 2 exacerbations per year were similar between patients with non-ACO COPD and ACO. Over a median follow-up duration of 5.8 years, patients with non-ACO COPD experienced a faster annual decline in pre-bronchodilator FEV1 than patients with ACO (- 29.3 ml/year vs. -13.9 ml/year, P = 0.042), which was persistent after adjustment for confounders affecting lung function decline.
CONCLUSION: Patients with ACO showed favorable longitudinal changes in lung function compared to COPD patients over a median follow-up of 5.8 years.

PMID: 29499758 [PubMed - in process]

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