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carbon monoxide diffusing capacity DLCO

Mehrdad Behnia, Courtney M Wheatley, Alberto Avolio, Bruce D Johnson
BACKGROUND: During exercise as pulmonary blood flow rises, pulmonary capillary blood volume increases and gas exchange surface area expands through distention and recruitment. We have previously demonstrated that pulmonary capillary recruitment is limited in COPD patients with poorer exercise tolerance. Hypoxia and endothelial dysfunction lead to pulmonary vascular dysregulation possibly in part related to nitric oxide related pathways. PURPOSE: To determine if increasing dietary nitrate might influence lung surface area for gas exchange and subsequently impact exercise performance...
March 13, 2018: Nitric Oxide: Biology and Chemistry
Kazuhiro Yamaguchi, Takao Tsuji, Kazutetsu Aoshiba, Hiroyuki Nakamura
In Europe and America, the newly-developed, simultaneous measurement of diffusing capacity for CO (DLCO ) and NO (DLNO ) has replaced the classic DLCO measurement for detecting the pathophysiological abnormalities in the acinar regions. However, simultaneous measurement of DLCO and DLNO is currently not used by Japanese physicians. To encourage the use of DLNO in Japan, the authors reviewed aspects of simultaneously-estimated DLCO and DLNO from previously published manuscripts. The simultaneous DLCO -DLNO technique identifies the alveolocapillary membrane-related diffusing capacity (membrane component, DM ) and the blood volume in pulmonary microcirculation (VC ); VC is the principal factor constituting the blood component of diffusing capacity (DB ,DB =θ·VC where θ is the specific gas conductance for CO or NO in the blood)...
March 2018: Respiratory Investigation
Anna Lis-Święty, Małgorzata Widuchowska, Ligia Brzezińska-Wcisło, Eugeniusz Kucharz
Objective This study was performed to evaluate the serum amyloid A (SAA) and C-reactive protein (CRP) levels in patients with diffuse systemic sclerosis (dSSc) in relation to a control group, disease duration, and skin and pulmonary involvement. Methods This case-control study included 18 patients with early dSSc, 15 patients with late dSSc, and 15 healthy controls. The SAA and CRP levels, modified Rodnan skin score (mRSS), and diffusing capacity of the lungs for carbon monoxide (DLCO) were determined in all patients...
January 1, 2018: Journal of International Medical Research
Fabrício Farias da Fontoura, Danilo Cortozi Berton, Guilherme Watte, Juliessa Florian, Sadi Marcelo Schio, José de Jesus Peixoto Camargo, Paulo José Zimermann Teixeira, José da Silva Moreira
PURPOSE: Currently, pulmonary rehabilitation (PR) has a weak recommendation for idiopathic pulmonary fibrosis (IPF) and is often recommended for mild to moderate disease. We aimed to investigate the completion rate of PR in patients with advanced IPF, to analyze whether the severity of disease influences PR response and whether there is any difference between subjects who are able or not able to successfully complete the program. METHODS: Patients with IPF referred to lung transplantation (n = 48) were enrolled in an outpatient PR program including 3 times/wk supervised exercise training during 12 wk...
March 2018: Journal of Cardiopulmonary Rehabilitation and Prevention
Sabine Adler, Dörte Huscher, Elise Siegert, Yannick Allanore, László Czirják, Francesco DelGaldo, Christopher P Denton, Oliver Distler, Marc Frerix, Marco Matucci-Cerinic, Ulf Mueller-Ladner, Ingo-Helmut Tarner, Gabriele Valentini, Ulrich A Walker, Peter M Villiger, Gabriela Riemekasten
BACKGROUND: Interstitial lung disease in systemic sclerosis (SSc-ILD) is a major cause of SSc-related death. Imunosuppressive treatment (IS) is used in patients with SSc for various organ manifestations mainly to ameliorate progression of SSc-ILD. Data on everyday IS prescription patterns and clinical courses of lung function during and after therapy are scarce. METHODS: We analysed patients fulfilling American College of Rheumatology (ACR)/European League against Rheumatism (EULAR) 2013 criteria for SSc-ILD and at least one report of IS...
January 30, 2018: Arthritis Research & Therapy
Hideaki Yamakawa, Tamiko Takemura, Tae Iwasawa, Yumie Yamanaka, Satoshi Ikeda, Akimasa Sekine, Hideya Kitamura, Tomohisa Baba, Shinichiro Iso, Koji Okudela, Kazuyoshi Kuwano, Takashi Ogura
BACKGROUND: Pulmonary emphysema combined with systemic sclerosis (SSc)-associated interstitial lung disease (ILD) occurs more often in smokers but also in never-smokers. This study aimed to describe a new finding characterized by peculiar emphysematous change with SSc-associated ILD (SSc-ILD). METHODS: We conducted a retrospective review of 21 consecutive patients with SSc-ILD diagnosed by surgical lung biopsy and focused on the radio-pathological correlation of the emphysematous change...
January 30, 2018: BMC Pulmonary Medicine
Kirsten E Coffman, Timothy B Curry, Niki M Dietz, Steven C Chase, Alex R Carlson, Briana L Ziegler, Bruce D Johnson
Alveolar-capillary surface area for pulmonary gas exchange falls with aging, causing a reduction in lung diffusing capacity for carbon monoxide (DLCO). However, during exercise additional factors may influence DLCO, including pulmonary blood flow and pulmonary vascular pressures. First, we sought to determine the age-dependent effect of incremental exercise on pulmonary vascular pressures and DLCO. We also aimed to investigate the dependence of DLCO on pulmonary vascular pressures during exercise via sildenafil administration to reduce pulmonary smooth muscle tone...
January 2018: Physiological Reports
Taiki Furukawa, Yasuhiro Kondoh, Hiroyuki Taniguchi, Mitsuaki Yagi, Toshiaki Matsuda, Tomoki Kimura, Kensuke Kataoka, Takeshi Johkoh, Masahiko Ando, Naozumi Hashimoto, Koji Sakamoto, Yoshinori Hasegawa
Elevated mean pulmonary arterial pressure (MPAP; ≥21 mmHg) is sometimes seen in patients with idiopathic pulmonary fibrosis (IPF) and has an adverse impact upon survival. Although early diagnosis is crucial, there is no established screening tool that uses a combination of noninvasive examinations.We retrospectively analysed IPF patients at initial evaluation from April 2007 to July 2015 and, using logistic regression analysis, created a screening tool to identify elevated MPAP. Internal validation was also assessed for external validity using a bootstrap method...
January 2018: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
Tatsuo Nakagawa, Yasuaki Tomioka, Toshiya Toyazaki, Masashi Gotoh
OBJECTIVE: We retrospectively investigated the possibility that the 6-min walk test (6MWT) could predict surgical outcomes in lung cancer patients with decreased predicted postoperative (ppo) lung function. METHODS: Patients were enrolled based on their preoperative spirometry: <60% of the ppo forced expiratory volume in 1 s (FEV1.0) or < 60% of the ppo lung carbon monoxide diffusion capacity (DLco). Morbidity, oxygen inhalation required > 10 days, home oxygen therapy (HOT) requirement, unexpected readmission within 90 days, and 90-day mortality were included as surgical outcomes...
January 17, 2018: General Thoracic and Cardiovascular Surgery
Xia Wei, Zhengquan Ma, Nan Yu, Jingting Ren, Chenwang Jin, Jiuyun Mi, Meijuan Shi, Libin Tian, Yanzhong Gao, Youmin Guo
Purpose: COPD is a heterogeneous disease, and the available prognostic indexes are therefore limited. This study aimed to identify the factors associated with acute exacerbation leading to hospitalization. Patients and methods: This was a retrospective study of consecutive patients with COPD (meeting the Global Initiative for Chronic Obstructive Lung Disease [GOLD] diagnostic criteria) hospitalized at the Ninth Hospital of Xi'an Affiliated Hospital of Xi'an Jiaotong University between October 2014 and September 2016...
2018: International Journal of Chronic Obstructive Pulmonary Disease
Qi Wu, Yao Zhou, Fan-Chao Feng, Xian-Mei Zhou
OBJECTIVE: To evaluate the effectiveness and safety of Chinese medicine (CM) for Idiopathic pulmonary fifibrosis (IPF) patients. METHODS: To screened relevant articles, PubMed, Cochrane Library, Excerpta Medica Datase (EMBASE), China National Knowledge Infrastructure (CNKI), Chinese VIP Information (VIP), Wanfang Database and Chinese Biomedical Database (CBM) were searched in English or Chinese until December 2015 for randomized controlled trials, which compared CM treatment (CM group) with Western medicine or placebo (control group) on IPF...
January 15, 2018: Chinese Journal of Integrative Medicine
Yong Il Hwang, Yong Bum Park, Hyoung Kyu Yoon, Seong Yong Lim, Tae Hyung Kim, Joo Hun Park, Won Yeon Lee, Seong Ju Park, Sei Won Lee, Woo Jin Kim, Ki Uk Kim, Kyeong Cheol Shin, Do Jin Kim, Hui Jung Kim, Tae Eun Kim, Kwang Ha Yoo, Jae Jeong Shim
BACKGROUND: The diffusing capacity of the lung is influenced by multiple factors such as age, sex, height, weight, ethnicity and smoking status. Although a prediction equation for the diffusing capacity of Korea was proposed in the mid-1980s, this equation is not used currently. The aim of this study was to develop a new prediction equation for the diffusing capacity for Koreans. METHODS: Using the data of the Korean National Health and Nutrition Examination Survey, a total of 140 nonsmokers with normal chest X-rays were enrolled in this study...
January 2018: Tuberculosis and Respiratory Diseases
Matthew R Gingo, Mehdi Nouraie, Cathy J Kessinger, Ruth M Greenblatt, Laurence Huang, Eric C Kleerup, Lawrence Kingsley, Deborah K McMahon, Alison Morris
RATIONALE: Human immunodeficiency virus (HIV) infection is associated with pulmonary disease and worse lung function, but the relationship of lung function with survival in HIV is unknown. OBJECTIVES: To determine whether lung function is associated with all-cause mortality in HIV-infected individuals. METHODS: HIV-infected participants from cohorts in three locations underwent pre- and post-bronchodilator spirometry and determination of single-breath diffusing capacity of the lung for carbon monoxide (DlCO ) in 2008-2009, computed tomographic (CT) scanning of the chest for quantitative emphysema and airway measures, and echocardiography for estimated left ventricular systolic and diastolic function and tricuspid regurgitant velocity...
February 2018: Annals of the American Thoracic Society
Naozumi Hashimoto, Akira Ando, Shingo Iwano, Koji Sakamoto, Shotaro Okachi, Asuka Matsuzaki, Yu Okada, Kenji Wakai, Kohei Yokoi, Yoshinori Hasegawa
BACKGROUND: There is only limited information on the impact of thin-section computed tomography (TSCT)-determined usual interstitial pneumonia (UIP) pattern in the decision-making for resection in newly diagnosed lung cancer patients. METHODS: In this retrospective analysis, data were reviewed from 499 newly diagnosed lung cancer patients who received bronchoscopy between 2010 and 2014. The clinical impact of TSCT-determined UIP pattern on the decision-making process for resection in this cohort was evaluated...
January 5, 2018: BMC Pulmonary Medicine
Hayley Barnes, Anne E Holland, Glen P Westall, Nicole Sl Goh, Ian N Glaspole
BACKGROUND: Approximately one-third of individuals with interstitial lung disease (ILD) have associated connective tissue disease (CTD). The connective tissue disorders most commonly associated with ILD include scleroderma/systemic sclerosis (SSc), rheumatoid arthritis, polymyositis/dermatomyositis, and Sjögren's syndrome. Although many people with CTD-ILD do not develop progressive lung disease, a significant proportion do progress, leading to reduced physical function, decreased quality of life, and death...
January 3, 2018: Cochrane Database of Systematic Reviews
Tunc Ones, Emel Eryuksel, Feyyaz Baltacioglu, Berrin Ceyhan, Tanju Yusuf Erdil
BACKGROUND: Selective internal radiation therapy (SIRT) with embolization of branches of the hepatic artery is a valuable therapeutic tool for patients with hepatic malignancies; however, it is also associated with lung injury risk due to shunting. Diffusion capacity of the lungs for carbon monoxide (DLCO) is a clinically significant lung function test, and worsening in DLCO is suggested to reflect a limited gas exchange reserve caused by the potential toxicity of chemoradiotherapy or it may be a marker of related lung injury...
December 29, 2017: EJNMMI Research
Kristen Capel, Richard Dee Shih
A previously healthy 55-year-old woman presented with worsening dyspnoea on exertion. The patient lived at altitude, did not smoke and had no exposure to occupational or environmental toxins. Her physical examination, including pulmonary, was unremarkable. Pulmonary function tests showed forced expiratory volume in 1 s/forced vital capacity ratio 74% predicted, diffusing capacity for carbon monoxide (DLCO) 92% predicted and residual volume 213% predicted. Rheumatological workup was negative. Chest radiograph showed hyperinflation without consolidation, and high-resolution chest CT showed mosaic attenuation with air trapping on expiratory imaging...
December 15, 2017: BMJ Case Reports
Claudio Caviezel, Nadja Schaffter, Didier Schneiter, Daniel Franzen, Ilhan Inci, Isabelle Opitz, Walter Weder
BACKGROUND: Lung volume reduction surgery (LVRS) has been proven to be a successful procedure and can be performed with low mortality when defined selection criteria are met. We hypothesized good outcome and low mortality after LVRS for selected patients with severe hyperinflation and nonhomogeneous morphology even when diffusion capacity of the lung for carbon monoxide (Dlco) is less than 20%. METHODS: The study included all patients scheduled for LVRS between March 2005 and May 2014 with a preoperative Dlco of less than 20%...
February 2018: Annals of Thoracic Surgery
Sang Hoon Lee, Moo Suk Park, Song Yee Kim, Dong Soon Kim, Young Whan Kim, Man Pyo Chung, Soo Taek Uh, Choon Sik Park, Sung Woo Park, Sung Hwan Jeong, Yong Bum Park, Hong Lyeol Lee, Jong Wook Shin, Eun Joo Lee, Jin Hwa Lee, Yangin Jegal, Hyun Kyung Lee, Yong Hyun Kim, Jin Woo Song, Jong Sun Park
BACKGROUND: The effects of corticosteroid-based therapy in patients with idiopathic nonspecific interstitial pneumonia (iNSIP), and factors affecting treatment outcome, are not fully understood. We aimed to investigate the long-term treatment response and factors affecting the treatment outcome in iNSIP patients from a multi-center study in Korea. METHODS: The Korean interstitial lung disease (ILD) Study Group surveyed ILD patients from 2003 to 2007. Patients were divided into two groups to compare the treatment response: response group (forced vital capacity (FVC) improves ≥10% after 1 year) and non-response group (FVC <10%)...
December 6, 2017: Respiratory Research
Eveliina Ronkainen, Marja Perhomaa, Lauri Mattila, Mikko Hallman, Teija Dunder
BACKGROUND: A new pattern of bronchopulmonary dysplasia (BPD) has emerged with the improved survival of preterm children. OBJECTIVES: Our aim was to characterize structural abnormalities associated with new BPD and to evaluate whether the severity of high-resolution computed tomography (HRCT) changes is associated with lung function. METHODS: HRCT scans were performed on 21 schoolchildren with a history of new BPD (mild, n = 9; moderate, n = 4; and severe, n = 8) with a mean age of 12...
2018: Neonatology
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