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Diffusion lung capacity for monoxide carbon

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https://www.readbyqxmd.com/read/27920514/usefulness-of-the-6-minute-walk-test-as-a-screening-test-for-pulmonary-arterial-enlargement-in-copd
#1
Yutaro Oki, Masahiro Kaneko, Yukari Fujimoto, Hideki Sakai, Shogo Misu, Yuji Mitani, Takumi Yamaguchi, Hisafumi Yasuda, Akira Ishikawa
PURPOSE: Pulmonary hypertension and exercise-induced oxygen desaturation (EID) influence acute exacerbation of COPD. Computed tomography (CT)-detected pulmonary artery (PA) enlargement is independently associated with acute COPD exacerbations. Associations between PA to aorta (PA:A) ratio and EID in patients with COPD have not been reported. We hypothesized that the PA:A ratio correlated with EID and that results of the 6-minute walk test (6MWT) would be useful for predicting the risk associated with PA:A >1...
2016: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/27913735/preoperative-pulmonary-rehabilitation-for-marginal-function-lung-cancer-patients
#2
Asra Hashmi, Frank A Baciewicz, Ayman O Soubani, Shirish M Gadgeel
BACKGROUND: This study aimed to evaluate the impact of preoperative pulmonary rehabilitation in lung cancer patients undergoing pulmonary resection surgery with marginal lung function. METHODS: Short-term outcomes of 42 patients with forced expiratory volume in 1 s < 1.6 L who underwent lung resection between 01/2006 and 12/2010 were reviewed retrospectively. They were divided into group A (no preoperative pulmonary rehabilitation) and group B (receiving pulmonary rehabilitation)...
December 2, 2016: Asian Cardiovascular & Thoracic Annals
https://www.readbyqxmd.com/read/27902753/emphysema-distribution-and-diffusion-capacity-predict-emphysema-progression-in-human-immunodeficiency-virus-infection
#3
Janice M Leung, Andrea Malagoli, Antonella Santoro, Giulia Besutti, Guido Ligabue, Riccardo Scaglioni, Darlene Dai, Cameron Hague, Jonathon Leipsic, Don D Sin, Sf Paul Man, Giovanni Guaraldi
BACKGROUND: Chronic obstructive pulmonary disease (COPD) and emphysema are common amongst patients with human immunodeficiency virus (HIV). We sought to determine the clinical factors that are associated with emphysema progression in HIV. METHODS: 345 HIV-infected patients enrolled in an outpatient HIV metabolic clinic with ≥2 chest computed tomography scans made up the study cohort. Images were qualitatively scored for emphysema based on percentage involvement of the lung...
2016: PloS One
https://www.readbyqxmd.com/read/27884796/can-the-measurement-of-pulmonary-diffusing-capacity-for-nitric-oxide-replace-the-measurement-of-pulmonary-diffusing-capacity-for-carbon-monoxide
#4
Gerald S Zavorsky, Ivo van der Lee
Pulmonary diffusing capacity for carbon monoxide (DLCO) has been an important pulmonary function test used since the 1950's. It measures the uptake of CO from the alveolar space into pulmonary capillary blood, following the same path as oxygen. It's used to evaluate/follow the progress of various lung diseases. In the eighties, a new test was developed similar to the DLCO test: pulmonary diffusing capacity for nitric oxide (DLNO). About 81-90% of the variance in DLNO is shared by DLCO in patients with cardiopulmonary disease and in healthy subjects...
November 21, 2016: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/27876834/the-measurement-of-lung-volumes-using-body-plethysmography-and-helium-dilution-methods-in-copd-patients-a-correlation-and-diagnosis-analysis
#5
Yongjiang Tang, Mingke Zhang, Yulin Feng, Binmiao Liang
Chronic obstructive pulmonary disease (COPD) is a chronic airway disease characterized by persistent airflow limitation. Moreover, lung hyperinflation evaluated by lung volumes is also the key pathophysiologic process during COPD progression. Nevertheless, there is still no preferred method to evaluate lung volumes. For this study, we recruited 170 patients with stable COPD to assess lung volumes stratified by airflow limitation severity. Lung volumes including residual volume (RV) and total lung capacity (TLC) were determined by both body plethysmography and helium dilution methods...
November 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27876024/evaluation-of-computer-based-computer-tomography-stratification-against-outcome-models-in-connective-tissue-disease-related-interstitial-lung-disease-a-patient-outcome-study
#6
Joseph Jacob, Brian J Bartholmai, Srinivasan Rajagopalan, Anne Laure Brun, Ryoko Egashira, Ronald Karwoski, Maria Kokosi, Athol U Wells, David M Hansell
BACKGROUND: To evaluate computer-based computer tomography (CT) analysis (CALIPER) against visual CT scoring and pulmonary function tests (PFTs) when predicting mortality in patients with connective tissue disease-related interstitial lung disease (CTD-ILD). To identify outcome differences between distinct CTD-ILD groups derived following automated stratification of CALIPER variables. METHODS: A total of 203 consecutive patients with assorted CTD-ILDs had CT parenchymal patterns evaluated by CALIPER and visual CT scoring: honeycombing, reticular pattern, ground glass opacities, pulmonary vessel volume, emphysema, and traction bronchiectasis...
November 23, 2016: BMC Medicine
https://www.readbyqxmd.com/read/27870589/results-of-a-prospective-study-evaluating-a-non-invasive-method-of-hemoglobin-adjustment-for-determining-the-diffusing-capacity-of-the-lung
#7
Karla E Foster, Rashmi D Sahay, Nanhua Zhang, William D Hardie
RATIONALE: Measurement of the lung diffusing capacity for carbon monoxide (DLCO) is significantly influenced by the pulmonary capillary blood volume. Consequently, measurements require adjustment for blood hemoglobin concentration (DLCOADJ) to allow meaningful clinical interpretation. Noninvasive point-of-care devices that measure hemoglobin transcutaneously provide immediate values for hemoglobin that may be useful in pulmonary function laboratories for determining DLCOADJ. OBJECTIVES: To test the hypothesis that DLCOADJ determinations obtained using a commerciallyavailable device for noninvasive, point-of-care measurement of blood hemoglobin concentrations are not importantly different from determinations obtained using hemoglobin concentrations measured conventionally on venous blood samples...
November 21, 2016: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/27869103/th-17-cytokines-and-interstitial-lung-involvement-in-systemic-sclerosis
#8
G Rolla, E Fusaro, S Nicola, C Bucca, C Peroni, S Parisi, M C Cassinis, A Ferraris, F Angelino, E Heffler, M Boita, L Brussino
The two phenotypes of both limited and diffuse systemic sclerosis (SSc) have different forms of pulmonary involvement: pulmonary arterial hypertension (limited phenotype) or interstitial lung disease (ILD) (diffuse phenotype). We aimed to investigate whether Th17-related cytokines, as measured in exhaled breath condensate (EBC) and in serum were connected to ILD in diffuse SSc patients. We found that for both limited and diffuse SSc, the EBC levels of all cytokines and most of the cytokine serum levels were significantly higher in patients than in controls, while, the EBC levels of Th-17 cytokines and the serum levels of IL-10 and TNF-α were significantly higher in diffuse than in limited SSc...
November 21, 2016: Journal of Breath Research
https://www.readbyqxmd.com/read/27868303/fat-free-mass-index-predicts-survival-in-patients-with-idiopathic-pulmonary-fibrosis
#9
Osamu Nishiyama, Ryo Yamazaki, Hiroyuki Sano, Takashi Iwanaga, Yuji Higashimoto, Hiroaki Kume, Yuji Tohda
BACKGROUND AND OBJECTIVE: Detailed body composition, such as fat-free mass, has not been examined in idiopathic pulmonary fibrosis (IPF). We investigated whether the fat-free mass index (FFMI), an index of lean body mass, predicted survival. METHODS: Forty-four patients with IPF were enrolled in the study. Their body composition was assessed using direct segmental multi-frequency bioelectrical impedance analysis. The degree of correlation between variables of body composition and other variables such as forced vital capacity (FVC) and survival was examined...
November 21, 2016: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/27863863/effect-of-%C3%AE-2-adrenergic-receptor-stimulation-on-lung-fluid-in-stable-heart-failure-patients
#10
Bryan J Taylor, Eric M Snyder, Maile L Richert, Courtney M Wheatley, Steven C Chase, Lyle J Olson, Bruce D Johnson
BACKGROUND: The purpose of this study was to determine: (1) whether stable heart failure patients with reduced ejection fraction (HFrEF) have elevated extravascular lung water (EVLW) when compared with healthy control subjects; and (2) the effect of acute β2-adrenergic receptor (β2AR) agonist inhalation on lung fluid balance. METHODS: Twenty-two stable HFrEF patients and 18 age- and gender-matched healthy subjects were studied. Lung diffusing capacity for carbon monoxide (DLCO), alveolar-capillary membrane conductance (DmCO), pulmonary capillary blood volume (Vc) (via re-breathe) and lung tissue volume (Vtis) (via computed tomography) were assessed before and within 30 minutes after administration of nebulized albuterol...
October 2, 2016: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/27860036/frailty-is-common-and-strongly-associated-with-dyspnoea-severity-in-fibrotic-interstitial-lung-disease
#11
Kathryn M Milne, Joanne M Kwan, Sabina Guler, Tiffany A Winstone, Angela Le, Nasreen Khalil, Pat G Camp, Pearce G Wilcox, Christopher J Ryerson
BACKGROUND AND OBJECTIVE: Frailty is the age-related accumulation of deficits that decrease the ability to respond to biological stress. Patients with fibrotic interstitial lung disease (ILD) may be frail due to consequences of ILD, age, co-morbidities and adverse effects of pharmacotherapies. The objective of this study was to examine the prevalence and predictors of frailty in fibrotic ILD. METHODS: Fibrotic ILD patients were recruited from a specialized clinic...
November 9, 2016: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/27836954/serum-ykl-40-as-predictor-of-outcome-in-hypersensitivity-pneumonitis
#12
Xiaoping Long, Xuan He, Shinichiro Ohshimo, Matthias Griese, Rafael Sarria, Josune Guzman, Ulrich Costabel, Francesco Bonella
YKL-40, a chitinase-like protein mainly secreted by macrophages, neutrophils and epithelial cells, is increased in patients with idiopathic interstitial pneumonia and sarcoidosis. We aimed to investigate the role of YKL-40 as a biomarker in hypersensitivity pneumonitis (HP).72 HP patients, 100 interstitial lung disease (ILD) controls and 60 healthy controls were studied. YKL-40 was measured by ELISA in serum and bronchoalveolar lavage fluid (BALF) at baseline and follow-up. The relationship between YKL-40 levels, clinical variables and disease outcome was evaluated...
November 11, 2016: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/27833966/analysis-of-bronchoalveolar-lavage-fluid-in-a-first-romanian-pulmonary-alveolar-proteinosis-cohort
#13
Oana Claudia Deleanu, Ana Maria Zaharie, Aneta Şerbescu, Floarea Mimi NiŢu, Florin Dumitru MihălŢan, Oana Cristina Arghir
The features of bronchoalveolar lavage fluid (BALF) components and the severity of pulmonary alveolar proteinosis (PAP) were analyzed in the first Romanian cohort of patients admitted to "Marius Nasta" Institute of Pneumophtisiology, Bucharest, Romania. A six-year follow-up study based on bronchoalveolar lavage (BAL) data was performed between January 2007 to December 2012. Study cohort consisted in 20 inpatients diagnosed with PAP, based on BALF cytological findings and÷or on histopathological findings. Demographic, medical history, tobacco use, clinical and radiological features, disease progression with or without whole lung lavage (WLL) therapy were collected...
2016: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/27826889/osteoprotegerin-srankl-signaling-system-in-pulmonary-sarcoidosis-a-bronchoalveolar-lavage-study
#14
W Naumnik, B Naumnik, W Niklińska, M Ossolińska, E Chyczewska
Osteoprotegerin (OPG), a soluble tumor necrosis factor receptor family molecule, protects endothelial cells from apoptosis in vitro and promotes neovascularization in vivo. Angiogenesis may be crucial for the course and outcome of sarcoidosis. In this study, we evaluated the clinical usefulness of OPG and its ligand, a soluble receptor activator of nuclear factor-kappaB (sRANKL), in bronchoalveolar lavage fluid (BALF) in patients with sarcoidosis (BBS, Besniera-Boeck-Schaumann disease). We studied 22 BBS patients and 15 healthy volunteers as a control group...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27816444/use-of-mycophenolate-mofetil-or-azathioprine-for-the-management-of-chronic-hypersensitivity-pneumonitis
#15
Julie Morisset, Kerri A Johannson, Eric Vittinghoff, Carlos Aravena, Brett M Elicker, Kirk D Jones, Charlene D Fell, Helene Manganas, Bruno-Pierre Dubé, Paul J Wolters, Harold R Collard, Christopher J Ryerson, Brett Ley
BACKGROUND: The treatment of chronic hypersensitivity pneumonitis (cHP) often includes systemic oral corticosteroids, but the optimal pharmacologic management remains unclear. The morbidity associated with prednisone has motivated the search for alternative therapies. We aimed to determine the effect of treatment with mycophenolate mofetil (MMF) or azathioprine (AZA) on lung function in patients with cHP. METHODS: Patients with cHP treated with either MMF or AZA were retrospectively identified from four interstitial lung disease centers...
November 2, 2016: Chest
https://www.readbyqxmd.com/read/27814863/predictive-models-of-six-minute-walking-distance-in-adults-with-sickle-cell-anemia-implications-for-rehabilitation
#16
Cirlene de Lima Marinho, Maria Christina Paixão Maioli, Andrea Ribeiro Soares, Ricardo Bedirian, Pedro Lopes de Melo, Fernando Silva Guimarães, Arthur de Sá Ferreira, Agnaldo José Lopes
BACKGROUND: Sickle cell anemia (SCA) is characterized by a broad spectrum of abnormalities that affect most body organs and systems. To date, there is few data on the influence of these patients' clinical characteristics on the functional exercise capacity. AIM: To investigate the effect of the clinical complications on the functional exercise capacity of adult SCA patients. METHOD: Cross-sectional study, where 45 SCA patients underwent clinical evaluations, echocardiography, pulmonary function testing, and determination of six-minute walking distance (6MWD)...
October 2016: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/27812295/the-copd-assessment-test-as-a-prognostic-marker-in-interstitial-lung-disease
#17
Fujiko Someya, Takao Nakagawa, Naoki Mugii
The chronic obstructive pulmonary disease (COPD) Assessment Test (CAT), which was developed to measure the health status of patients with COPD, was applied to patients with interstitial lung disease, aiming to examine the CAT as a predictor of outcome. Over a follow-up period of more than one year, 101 consecutive patients with interstitial lung disease were evaluated by the CAT. The CAT scores of 40 in total were categorized into four subsets according to the severity. Patients with higher (more severe) scores exhibited lower forced vital capacity and lung diffusion capacity for carbon monoxide...
2016: Clinical Medicine Insights. Circulatory, Respiratory and Pulmonary Medicine
https://www.readbyqxmd.com/read/27811068/mortality-prediction-in-ipf-evaluation-of-automated-computer-tomographic-analysis-with-conventional-severity-measures
#18
Joseph Jacob, Brian J Bartholmai, Srinivasan Rajagopalan, Maria Kokosi, Arjun Nair, Ronald Karwoski, Simon L F Walsh, Athol U Wells, David M Hansell
Computer-based computed tomography (CT) analysis can provide objective quantitation of disease in idiopathic pulmonary fibrosis (IPF). A computer algorithm, CALIPER, was compared with conventional CT and pulmonary function measures of disease severity for mortality prediction.CT and pulmonary function variables (forced expiratory volume in 1 s, forced vital capacity, diffusion capacity of the lung for carbon monoxide, transfer coefficient of the lung for carbon monoxide and composite physiologic index (CPI)) of 283 consecutive patients with a multidisciplinary diagnosis of IPF were evaluated against mortality...
November 3, 2016: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/27803750/alterations-of-pulmonary-function-in-patients-with-inflammatory-bowel-diseases
#19
Xiao-Qing Ji, Yan-Bo Ji, Shan-Xin Wang, Cai-Qing Zhang, De-Gan Lu
AIM: The aim of this study was to investigate the alterations of pulmonary function tests (PFTs) and their relationship with disease activity in inflammatory bowel diseases (IBDs). METHODS: Sixty-four IBD patients (31 Crohn's disease [CD] and 33 ulcerative colitis [UC]) and thirty healthy individuals (controls) were studied with regard to the following parameters of PFTs: Forced expiratory volume in 1 s (FEV1), forced vital capacity (FVC), their ratio, mid-forced expiratory flow of 25-75% (FEF 25-75), residual volume, total lung capacity, and diffusing capacity of the lung for carbon monoxide (DLCO)...
October 2016: Annals of Thoracic Medicine
https://www.readbyqxmd.com/read/27788297/progressive-decline-of-lung-function-in-rheumatoid-arthritis-associated-interstitial-lung-disease
#20
Jorge A Zamora-Legoff, Megan L Krause, Cynthia S Crowson, Jay H Ryu, Eric L Matteson
OBJECTIVE: Interstitial lung disease (ILD) is associated with substantial morbidity in rheumatoid arthritis (RA), but very little is known about its long-term progression. METHODS: All patients with RA-ILD seen at Mayo Clinic in 1998-2014 with at least 4 weeks follow-up and at least 1 pulmonary function test (PFT) were identified and manually screened for study inclusion. Progression was defined as a diffusing capacity for carbon monoxide (DLCO) <40% predicted or too ill to perform, or a forced vital capacity (FVC) <50% predicted...
October 27, 2016: Arthritis & Rheumatology
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