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Lung clearance index

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https://www.readbyqxmd.com/read/28634892/lung-clearance-index-lci-is-stable-in-most-primary-ciliary-dyskinesia-pcd-patients-managed-in-a-specialist-centre-a-pilot-study
#1
S Irving, S Carr, C Hogg, M Loebinger, A Shoemark, A Bush
Primary ciliary dyskinesia is a condition in which abnormal cilia structure or function leads to reduced mucociliary clearance and obstructive lung disease. Twenty-nine patients had lung clearance index (LCI) measured in 2009 and we attempted to perform a 5-year follow-up. Only 12 patients could be re-recruited, but in this small group LCI was stable over the 5 years, which confirms previous data showing that spirometry is also stable in these patients over the medium term. The two patients with the highest LCI in 2009 had since died, despite one having relatively preserved spirometry at the time...
June 20, 2017: Lung
https://www.readbyqxmd.com/read/28625256/-comparison-of-effect-of-norepinephrine-and-terlipressin-on-patients-with-ards-combined-with-septic-shock-a-prospective-single-blind-randomized-controlled-trial
#2
Zhi Chen, Ping Zhou, Yuanhua Lu, Chunli Yang
OBJECTIVE: To approach the effect of different vasopressor on hemodynamics, volume responsiveness, fluid volume balance, renal function and prognosis in patients with acute respiratory distress syndrome (ARDS) complicated with septic shock. METHODS: A prospective single-blind randomized controlled trial was conducted. ARDS patients with septic shock admitted to the Department of Critical Care Medicine of Jiangxi Provincial People's Hospital from January 1st, 2015 to May 1st, 2016 were enrolled...
February 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28571133/influence-of-central-obesity-assessed-by-conicity-index-on-lung-age-in-young-adults
#3
Usha Shenoy, Jagadamba
INTRODUCTION: Central obesity is an emerging public health problem in young adults which compromises lung mechanics. Conicity Index (CI) is a simple anthropometric measure to assess central adiposity. The concept of lung age relates to a person's current lung function at which his/her lung function would be considered abnormal in relation to the present actual age. AIM: To determine the effect of central obesity by CI on lung age in young adults. MATERIALS AND METHODS: A total of 319 young adults in the age group 18-25 years were recruited for this cross-sectional observational study...
April 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28559256/aerosolized-polymyxin-b-for-treatment-of-respiratory-tract-infections-determination-of-pharmacokinetic-pharmacodynamic-indices-for-aerosolized-polymyxin-b-against-pseudomonas-aeruginosa-in-a-mouse-lung-infection-model
#4
Yu-Wei Lin, Qi Tony Zhou, Nikolas J Onufrak, Veronika Wirth, Ke Chen, Jiping Wang, Alan Forrest, Hak-Kim Chan, Jian Li
Pulmonary administration of polymyxins is increasingly used for the treatment of respiratory tract infections caused by multidrug-resistant Gram-negative bacteria, such as those in patients with cystic fibrosis. However, there is a lack of pharmacokinetics (PK), pharmacodynamics (PD) and toxicity data of aerosolized polymyxin B to inform rational dosage selection. The PK and PD of polymyxin B following pulmonary and intravenous dosing were conducted in neutropenic infected mice and the data were analyzed by a population PK model...
May 30, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28551402/free-breathing-functional-pulmonary-mri-response-to-bronchodilator-and-bronchoprovocation-in-severe-asthma
#5
Dante P I Capaldi, Khadija Sheikh, Rachel L Eddy, Fumin Guo, Sarah Svenningsen, Parameswaran Nair, David G McCormack, Grace Parraga
RATIONALE AND OBJECTIVES: Ventilation heterogeneity is a hallmark feature of asthma. Our objective was to evaluate ventilation heterogeneity in patients with severe asthma, both pre- and post-salbutamol, as well as post-methacholine (MCh) challenge using the lung clearance index, free-breathing pulmonary (1)H magnetic resonance imaging (FDMRI), and inhaled-gas MRI ventilation defect percent (VDP). MATERIALS AND METHODS: Sixteen severe asthmatics (49 ± 10 years) provided written informed consent to an ethics board-approved protocol...
May 24, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28511651/high-resolution-mucociliary-transport-measurement-in-live-excised-large-animal-trachea-using-synchrotron-x-ray-imaging
#6
Martin Donnelley, Kaye S Morgan, Maged Awadalla, Nigel R Farrow, Chris Hall, David W Parsons
BACKGROUND: The Australian Synchrotron Imaging and Medical Beamline (IMBL) was designed as the world's widest synchrotron X-ray beam, enabling both clinical imaging and therapeutic applications for humans as well as the imaging of large animal models. Our group is developing methods for imaging the airways of newly developed CF animal models that display human-like lung disease, such as the CF pig, and we expect that the IMBL can be utilised to image airways in animals of this size. METHODS: This study utilised samples of excised tracheal tissue to assess the feasibility, logistics and protocols required for airway imaging in large animal models such as pigs and sheep at the IMBL...
May 16, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28486753/small-airway-function-before-and-after-cold-dry-air-challenge-in-pediatric-asthma-patients-during-remission
#7
Michael Steinbacher, Andreas Pfleger, Gerold Schwantzer, Stefanie Jauk, Elisabeth Weinhandl, Ernst Eber
BACKGROUND: We wanted to compare cold dry air challenge (CACh) induced changes in spirometric parameters with changes in nitrogen multiple breath washout (N2 MBW) parameters in pediatric asthma patients during clinical remission over the past year (ie, with "inactive asthma"). As N2 MBW assesses ventilation heterogeneity we expected to gain detailed information about peripheral airways contribution. METHODS: In subjects with normal spirometry N2 MBW, spirometry and body plethysmography were performed at baseline, after CACh, and after salbutamol inhalation...
May 9, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28483700/chemosensitizing-indomethacin-conjugated-chitosan-oligosaccharide-nanoparticles-for-tumor-targeted-drug-delivery
#8
Jae-Young Lee, Ubonvan Termsarasab, Mee Yeon Lee, Dong-Hwan Kim, Song Yi Lee, Jung Sun Kim, Hyun-Jong Cho, Dae-Duk Kim
A chitosan oligosaccharide (CSO)-indomethacin (IDM) conjugate (CI) was synthesized to fabricate chemosensitizing nanoparticles (NPs) for tumor-targeted drug delivery. IDM was conjugated to a CSO backbone via amide bond formation, of which successful synthesis was confirmed by proton-nuclear magnetic resonance analyses. Doxorubicin (DOX)-loaded CI (CI10/DOX; CI:DOX=10:1 [w/w]) NPs with <75nm of mean diameter, polydispersity index of ∼0.2, and positive zeta potential were prepared. The release of DOX from the NPs was enhanced at acidic pH (pH 5...
May 5, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28481640/multiple-breath-washout-outcomes-are-sensitive-to-inflammation-and-infection-in-children-with-cystic-fibrosis
#9
Kathryn A Ramsey, Rachel E Foong, Jasmine Grdosic, Alana Harper, Billy Skoric, Charles Clem, Miriam Davis, Lidija Turkovic, Stephen M Stick, Stephanie D Davis, Sarath C Ranganathan, Graham L Hall
RATIONALE: The lung clearance index is a measure of ventilation distribution from the multiple breath washout technique. The lung clearance index is increased in the presence of lower respiratory tract inflammation and infection in infants with cystic fibrosis, however the associations during the preschool years are unknown. OBJECTIVES: We assessed the ability of the lung clearance index to detect the presence and extent of lower respiratory tract inflammation and infection in preschool children with cystic fibrosis...
May 8, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28459345/elementary-my-dear-watson-the-accumulating-evidence-for-the-lung-clearance-index-in-monitoring-early-cystic-fibrosis-lung-disease
#10
Jessica Pittman, Margaret Rosenfeld
No abstract text is available yet for this article.
May 1, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28453306/the-association-of-lung-clearance-index-with-copd-and-fev-1-reduction-in-men-born-in-1914
#11
Suneela Zaigham, Per Wollmer, Gunnar Engström
Lung Clearance Index (LCI) provides an overall measurement of ventilation inhomogeneity. This population-based study examines whether LCI predicts pulmonary obstruction and incidence of chronic obstructive pulmonary disease (COPD) events over a long-term follow-up. Multiple breath nitrogen washout and spirometry were performed in 674 men from the cohort "Men born in 1914" at age 55 years. Subjects were classified into quartiles (Q) of LCI and according to LCI above and below upper limit of normal (ULN). Incidence of COPD events (COPD hospitalisations or COPD-related deaths) were monitored over the remaining life span of the men, by linkage with national hospital registers...
April 28, 2017: COPD
https://www.readbyqxmd.com/read/28426673/lymph-node-volume-predicts-survival-but-not-nodal-clearance-in-stage-iiia-iiib-nsclc
#12
Vishesh Agrawal, Thibaud P Coroller, Ying Hou, Stephanie W Lee, John L Romano, Elizabeth H Baldini, Aileen B Chen, David Kozono, Scott J Swanson, Jon O Wee, Hugo J W L Aerts, Raymond H Mak
BACKGROUND: Locally advanced non-small cell lung cancer (LA-NSCLC) patients have poorer survival and local control with mediastinal node (N2) tumor involvement at resection. Earlier assessment of nodal burden could inform clinical decision-making prior to surgery. This study evaluated the association between clinical outcomes and lymph node volume before and after neoadjuvant therapy. MATERIALS AND METHODS: CT imaging of patients with operable LA-NSCLC treated with chemoradiation and surgical resection was assessed...
2017: PloS One
https://www.readbyqxmd.com/read/28274405/state-of-dose-prescription-and-compliance-to-international-standard-icru-83-in-intensity-modulated-radiation-therapy-among-academic-institutions
#13
MULTICENTER STUDY
Indra J Das, Aaron Andersen, Zhe Jay Chen, Andrea Dimofte, Eli Glatstein, Jeremy Hoisak, Long Huang, Mark P Langer, Choonik Lee, Matthew Pacella, Richard A Popple, Roger Rice, Jennifer Smilowitz, Patricia Sponseller, Timothy Zhu
PURPOSE: The purpose of this study was to evaluate dose prescription and recording compliance to international standard (International Commission on Radiation Units & Measurements [ICRU]-83) in patients treated with intensity modulated radiation therapy (IMRT) among academic institutions. METHODS AND MATERIALS: Ten institutions participated in this study to collect IMRT data to evaluate compliance to ICRU-83. Under institutional review board clearance, data from 5094 patients-including treatment site, technique, planner, physician, prescribed dose, target volume, monitor units, planning system, and dose calculation algorithm-were collected anonymously...
March 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28248548/lung-function-in-south-african-adolescents-infected-perinatally-with-hiv-and-treated-long-term-with-antiretroviral-therapy
#14
Leah Nyawira Githinji, Diane M Gray, Sipho Hlengwa, Landon Myer, Heather J Zar
RATIONALE: Lung disease is a common cause of mortality and morbidity in HIV-infected adolescents, but there is limited information on the spectrum of lung function impairment in adolescents on antiretroviral therapy. OBJECTIVES: To investigate lung function in HIV-infected adolescents on antiretroviral therapy in the Cape Town Adolescent Antiretroviral Cohort (Cape Town, South Africa). METHODS: A total of 515 South African adolescents, aged 9-14 years, stable on antiretroviral therapy for at least 6 months, underwent baseline lung function testing...
May 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28223466/short-term-effect-of-autogenic-drainage-on-ventilation-inhomogeneity-in-adult-subjects-with-stable-non-cystic-fibrosis-bronchiectasis
#15
William Poncin, Grégory Reychler, Noémie Leeuwerck, Nathalie Bauwens, Anne-Sophie Aubriot, Candice Nader, Giuseppe Liistro, Sophie Gohy
BACKGROUND: Lung clearance index (LCI), a measure of ventilation inhomogeneity derived from a multiple-breath washout test, is a promising tool for assessing airway function in patients with non-cystic fibrosis bronchiectasis. However, it is unknown whether ventilation inhomogeneity could improve after successful elimination of excessive secretions within bronchiectasis. The objective of this work was to assess the short-term effects of lung secretion clearance using the autogenic drainage technique on standard lung function tests and LCI in subjects with non-cystic fibrosis bronchiectasis...
February 21, 2017: Respiratory Care
https://www.readbyqxmd.com/read/28221737/feasibility-of-multiple-breath-washout-measurements-in-infants-with-bronchiolitis-a-pilot-study
#16
Patrick Stafler, Sigal Weinreb, Huda Mussaffi, Meir Mei-Zahav, Dario Prais, Guy Steuer, Ophir Bar-On, Moshe Hoshen, Hannah Blau
BACKGROUND: Lung clearance index (LCI) reflects ventilation inhomogeneity and is raised in obstructive airway disease. Feasibility of multiple breath washout (MBW) measurement during acute lung disease in infants is unknown. As a further measure of disease, exhaled nitric oxide (eNO) may paradoxically decrease in acute bronchiolitis. We hypothesized that MBW measurements were attainable in infants with bronchiolitis and that LCI was raised and eNO reduced, compared to normal controls...
June 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28188011/effect-of-posture-on-lung-ventilation-distribution-and-associations-with-structure-in-children-with-cystic-fibrosis
#17
Kathryn A Ramsey, Caroline McGirr, Stephen M Stick, Graham L Hall, Shannon J Simpson
BACKGROUND: We assessed the effect of posture on ventilation distribution and the impact on associations with structural lung disease. METHODS: Multiple breath washout (MBW) was performed in seated and supine postures in 25 healthy children and 21 children with CF. Children with CF also underwent a chest CT scan. Functional residual capacity (FRC), lung clearance index (LCI) and moment ratios were calculated from the MBW test. CT scans were evaluated for CF-related structural lung disease...
February 7, 2017: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/28125158/chest-physiotherapy-can-affect-the-lung-clearance-index-in-cystic-fibrosis-patients
#18
RANDOMIZED CONTROLLED TRIAL
Joerg Grosse-Onnebrink, Uwe Mellies, Margarete Olivier, Claudius Werner, Florian Stehling
OBJECTIVES: The lung clearance index (LCI) is determined by multiple-breath washout lung function (MBW). It is increasingly used as an endpoint in clinical trials. Chest physiotherapy (CP) is part of routine cystic fibrosis (CF) care. Whether the LCI is useful in detecting short-term treatment effects of CP has not been sufficiently investigated. We assessed the short-term influence of CP with highly standardized high-frequency chest wall oscillation (HFCWO) on the LCI in CF patients...
May 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28123751/timing-of-hypertonic-saline-and-airway-clearance-techniques-in-adults-with-cystic-fibrosis-during-pulmonary-exacerbation-pilot-data-from-a-randomised-crossover-study
#19
Katherine O'Neill, Fidelma Moran, Michael M Tunney, J Stuart Elborn, Ian Bradbury, Damian G Downey, Jackie Rendall, Judy M Bradley
BACKGROUND: Streamlining the timing of treatments in cystic fibrosis (CF) is important to optimise adherence while ensuring efficacy. The optimal timing of treatment with hypertonic saline (HTS) and airway clearance techniques (ACT) is unknown. OBJECTIVES: This study hypothesised that HTS before ACT would be more effective than HTS during ACT as measured by Lung Clearance Index (LCI). METHODS: Adults with CF providing written informed consent were randomised to a crossover trial of HTS before ACT or HTS during ACT on consecutive days...
2017: BMJ Open Respiratory Research
https://www.readbyqxmd.com/read/28122863/alternative-inert-gas-washout-outcomes-in-patients-with-primary-ciliary-dyskinesia
#20
Sylvia Nyilas, Anne Schlegtendal, Florian Singer, Myrofora Goutaki, Claudia E Kuehni, Carmen Casaulta, Philipp Latzin, Cordula Koerner-Rettberg
The lung clearance index (LCI) derived from a nitrogen multiple breath washout test (N2-MBW) is a promising tool to assess small airways disease in primary ciliary dyskinesia, but it is difficult to apply in routine clinical settings because of its long measuring time. In this study, we aimed to assess alternative indices derived from shorter washout protocols.49 patients with primary ciliary dyskinesia (mean age 14.7±6.6 years) and 37 controls (mean age 14.3±1.4 years) performed N2-MBW and double-tracer gas (DTG) single-breath washout tests...
January 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
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