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Lung clearance index

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https://www.readbyqxmd.com/read/29907664/ventilation-inhomogeneity-in-infants-with-recurrent-wheezing
#1
Zihang Lu, Rachel E Foong, Krzysztof Kowalik, Theo J Moraes, Ayanna Boyce, Aimee Dubeau, Susan Balkovec, Per Magnus Gustafsson, Allan B Becker, Piush J Mandhane, Stuart E Turvey, Wendy Lou, Felix Ratjen, Malcolm Sears, Padmaja Subbarao
BACKGROUND: The care of infants with recurrent wheezing relies largely on clinical assessment. The lung clearance index (LCI), a measure of ventilation inhomogeneity, is a sensitive marker of early airway disease in children with cystic fibrosis, but its utility has not been explored in infants with recurrent wheezing. OBJECTIVE: To assess ventilation inhomogeneity using LCI among infants with a history of recurrent wheezing compared with healthy controls. METHODS: This is a case-control study, including 37 infants with recurrent wheezing recruited from outpatient clinics, and 113 healthy infants from a longitudinal birth cohort, the Canadian Healthy Infant Longitudinal Development study...
June 15, 2018: Thorax
https://www.readbyqxmd.com/read/29765541/the-effect-of-antiviral-therapy-on-serum-lipid-profiles-in-chronic-hepatitis-c
#2
Batbold Batsaikhan, Ching-I Huang, Ming-Lun Yeh, Chung-Feng Huang, Nei-Jen Hou, Zu-Yau Lin, Shinn-Cherng Chen, Jee-Fu Huang, Ming-Lung Yu, Wan-Long Chuang, Jin-Ching Lee, Chia-Yen Dai
Background: Low lipid profile is associated with hepatitis C virus (HCV) infection. Chronic HCV infection is the main cause of liver injury and serum lipid levels during antiviral treatment. We aimed to evaluate the effect of antiviral treatment on the change of lipid profiles during HCV treatment. Methods: Total 863 patients who complete the interferon-based therapy in Kaohsiung Medical University Hospital were included in this study. The lipid profile measured and evaluated in baseline and after 6 months of the treatment...
April 20, 2018: Oncotarget
https://www.readbyqxmd.com/read/29707562/the-clinical-utility-of-lung-clearance-index-in-early-cystic-fibrosis-lung-disease-is-not-impacted-by-the-number-of-multiple-breath-washout-trials
#3
Rachel E Foong, Alana J Harper, Billy Skoric, Louise King, Lidija Turkovic, Miriam Davis, Charles C Clem, Tim Rosenow, Stephanie D Davis, Sarath Ranganathan, Graham L Hall, Kathryn A Ramsey
The lung clearance index (LCI) from the multiple-breath washout (MBW) test is a promising surveillance tool for pre-school children with cystic fibrosis (CF). Current guidelines for MBW testing recommend that three acceptable trials are required. However, success rates to achieve these criteria are low in children aged <7 years and feasibility may improve with modified pre-school criteria that accepts tests with two acceptable trials. This study aimed to determine if relationships between LCI and clinical outcomes of CF lung disease differ when only two acceptable MBW trials are assessed...
January 2018: ERJ Open Research
https://www.readbyqxmd.com/read/29684175/aminoglycoside-exposure-and-renal-function-before-lung-transplantation-in-adult-cystic-fibrosis-patients
#4
Etienne Novel-Catin, Solenne Pelletier, Quitterie Reynaud, Raphaele Nove-Josserand, Stephane Durupt, Laurence Dubourg, Isabelle Durieu, Denis Fouque
Background: Patients with cystic fibrosis (CF) are at risk of kidney injury even before undergoing lung transplantation, because of prolonged exposure to aminoglycosides (AGs), chronic dehydration and complications of diabetes mellitus. The usual equations estimating the glomerular filtration rate (GFR), such as Cockcroft-Gault and Modification of Diet in Renal Disease, are not adapted to the CF population due to patients' low body weight and reduced muscle mass. The aim of this study was to precisely measure GFR in adult CF patients and to see whether repeated AG treatment would impair renal function before lung transplantation...
April 18, 2018: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29676632/deployment-related-lung-disease-is-associated-with-abnormal-ventilation-on-cardiopulmonary-exercise-testing-and-with-increased-lung-clearance-index-score
#5
Silpa D Krefft, Eva B Gottschall, Jennifer J Smith, Matthew Strand, Cecile Rose
RATIONALE: An unknown number of post-9/11 military deployers to Iraq and Afghanistan have returned with respiratory symptoms and may be at risk for deployment-related distal lung disease, detected only on surgical lung biopsy. We hypothesized that cardiopulmonary exercise testing and lung clearance index scores would differ significantly between deployers with and without biopsy-proven deployment-related distal lung disease. OBJECTIVES: To assess if there are differences in cardiopulmonary exercise testing and lung clearance index scores between deployers with and without biopsy-proven deployment-related distal lung disease...
April 2018: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29614238/changes-in-lung-clearance-index-in-preschool-cystic-fibrosis-patients-treated-with-ivacaftor
#6
Felix Ratjen, Michelle Klingel, Philip Black, Michael R Powers, Hartmut Grasemann, Melinda Solomon, Scott D Sagel, Scott H Donaldson, Steven M Rowe, Margaret Rosenfeld
No abstract text is available yet for this article.
April 3, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29582453/bayesian-modelling-of-lung-function-data-from-multiple-breath-washout-tests
#7
Robert K Mahar, John B Carlin, Sarath Ranganathan, Anne-Louise Ponsonby, Peter Vuillermin, Damjan Vukcevic
Paediatric respiratory researchers have widely adopted the multiple-breath washout (MBW) test because it allows assessment of lung function in unsedated infants and is well suited to longitudinal studies of lung development and disease. However, a substantial proportion of MBW tests in infants fail current acceptability criteria. We hypothesised that a model-based approach to analysing the data, in place of traditional simple empirical summaries, would enable more efficient use of these tests. We therefore developed a novel statistical model for infant MBW data and applied it to 1197 tests from 432 individuals from a large birth cohort study...
May 30, 2018: Statistics in Medicine
https://www.readbyqxmd.com/read/29579539/new-directions-on-lung-clearance-index-variability-and-feasibility
#8
EDITORIAL
Katherine O'Neill, Clare Saunders
No abstract text is available yet for this article.
March 2018: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/29573509/multiple-breath-washout-a-new-and-promising-lung-function-test-for-patients-with-idiopathic-pulmonary-fibrosis
#9
Sylvia Nyilas, Theresa Schreder, Florian Singer, Alexander Poellinger, Thomas Kurt Geiser, Philipp Latzin, Manuela Funke
BACKGROUND AND OBJECTIVE: Idiopathic pulmonary fibrosis (IPF) is a devastating progressive lung disease affecting the parenchyma. Nitrogen multiple-breath washout (N2 -MBW) is a lung function test that measures ventilation inhomogeneity, a biomarker of small airway disease. We assessed clinical properties of N2 -MBW in IPF. METHODS: In this prospective cohort pilot study, 25 IPF patients and 25 healthy controls were assessed at baseline and 10 patients at median 6...
March 24, 2018: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/29497618/leaks-during-multiple-breath-washout-characterisation-and-influence-on-outcomes
#10
Nina Lenherr, Kathryn A Ramsey, Kerstin Jost, Linn Hornwall, Florian Singer, Sophie Yammine, Philipp Latzin
Nitrogen multiple-breath washout (N2 MBW) is increasingly used in patients with cystic fibrosis. The current European Respiratory Society/American Thoracic Society consensus statement for MBW recommends the rejection of measurements with leaks. However, it is unclear whether this is necessary for all types of leaks. Here, our aim was to 1) model and 2) apply air leaks, and 3) to assess their influence on the primary MBW outcomes of lung clearance index and functional residual capacity. We investigated the influence of air leaks at various locations (pre-, intra- and post-capillary), sizes, durations and stages of the washout...
January 2018: ERJ Open Research
https://www.readbyqxmd.com/read/29483491/determination-of-cisplatin-in-human-blood-plasma-and-urine-using-liquid-chromatography-mass-spectrometry-for-oncological-patients-with-a-variety-of-fatty-tissue-mass-for-prediction-of-toxicity
#11
A Gerina-Berzina, S Hasnere, A Kolesovs, S Umbrashko, R Muceniece, I Nakurte
AIM: The research was aimed to analyze a level of triglycerides in blood serum as a possible new marker of toxicity, particularly in patients with excess body weight, receiving cisplatin. MATERIALS AND METHODS: Study involved 20 oncological patients with stage III lung cancer, who received palliative treatment with cisplatin. High-performance liquid chromatography was used for quantitative determination of pure cisplatin in urine and blood samples. Cisplatin concentration of the test samples was determined based on the data obtained from the calibration graph...
July 2017: Experimental Oncology
https://www.readbyqxmd.com/read/29449440/lung-clearance-index-to-monitor-treatment-response-in-pulmonary-exacerbations-in-preschool-children-with-cystic-fibrosis
#12
Jonathan H Rayment, Sanja Stanojevic, Stephanie D Davis, George Retsch-Bogart, Felix Ratjen
BACKGROUND: Antibiotic treatment for pulmonary symptoms in preschool children with cystic fibrosis (CF) varies among clinicians. The lung clearance index (LCI) is sensitive to early CF lung disease, but its utility to monitor pulmonary exacerbations in young children has not been assessed. OBJECTIVE: We aim to (1) understand how LCI changes during lower respiratory tract symptoms relative to a recent clinically stable measurement, (2) determine whether LCI can identify antibiotic treatment response and (3) compare LCI changes to changes in spirometric indices...
May 2018: Thorax
https://www.readbyqxmd.com/read/29444773/lung-function-inflammation-and-endothelin-1-in-congenital-heart-disease-associated-pulmonary-arterial-hypertension
#13
Andrew Low, Sarah George, Luke Howard, Nicholas Bell, Ann Millar, Robert M R Tulloh
BACKGROUND: Breathlessness is the most common symptom in people with pulmonary arterial hypertension and congenital heart disease (CHD-APAH), previously thought to be caused by worsening PAH, but perhaps also by inflammation and abnormalities of lung function. We studied lung function and airway inflammation in patients with CHD-APAH and compared the results with controls. METHODS AND RESULTS: Sixty people were recruited into the study: 20 CHD-APAH, 20 CHD controls, and 20 healthy controls...
February 14, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29394172/the-emerging-spectrum-of-exposure-related-bronchiolitis
#14
Silpa D Krefft, Carlyne D Cool, Cecile S Rose
PURPOSE OF REVIEW: Exposure-related bronchiolitis is increasingly recognized as an important but challenging clinical diagnosis. Acute and chronic inhalational exposures are associated with variable clinical presentations and a spectrum of histopathologic abnormalities affecting the small airways. This review provides an overview of the histologic patterns and occupational settings for exposure-related bronchiolitis, along with recent advances in disease diagnosis and management. RECENT FINDINGS: The entire histopathologic spectrum of bronchiolitis (constrictive, obliterative, proliferative, lymphocytic, respiratory) has been reported in exposure-related bronchiolitis...
April 2018: Current Opinion in Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29372944/determination-of-the-lung-clearance-index-lci-in-a-paediatric-cystic-fibrosis-cohort
#15
M Mulligan, L Collins, C P Dunne, L Keane, B Linnane
The pathogenesis of CF lung disease may start in infancy. Therefore, it is important to monitor the early stages of its progress. The Exhalyzer D is the first commercially available device designed to measure lung ventilation inhomogeneity at any age. This study was conducted to assess the performance and feasibility of using the Exhalyzer D in a paediatric CF clinic. A total of 91 subjects were recruited (23 controls, and 68 patients with CF). The majority of CF patients (79%) and controls (78%) completed at least two successful washouts...
October 10, 2017: Irish Medical Journal
https://www.readbyqxmd.com/read/29368419/utility-of-single-versus-multiple-breath-washout-in-adult-asthma
#16
S Kjellberg, E Viklund, P D Robinson, O Zetterström, A-C Olin, P Gustafsson
Nitrogen multiple breath washout (N2 MBW) is a sensitive method to identify peripheral airway involvement in asthma, but is a time-consuming test. The N2 vital capacity single breath (VC SBW) test offers greater time efficiency, but concordance with N2 MBW is poorly understood. The prevalence of peripheral airway abnormality was determined by N2 MBW and N2 SBW tests in 194 asthmatic subjects aged 18-1 years. N2 MBW data were related to findings in 400 healthy controls, aged 17-71 years, while N2 SBW data were compared to findings in 224 healthy controls, aged 15-65 years, to derive equipment-specific reference values...
January 24, 2018: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/29368042/primary-ciliary-dyskinesia-due-to-microtubular-defects-is-associated-with-worse-lung-clearance-index
#17
S Irving, M Dixon, M R Fassad, E Frost, J Hayward, K Kilpin, S Ollosson, A Onoufriadis, M P Patel, J Scully, S B Carr, H M Mitchison, M R Loebinger, C Hogg, A Shoemark, A Bush
PURPOSE: Primary ciliary dyskinesia (PCD) is characterised by repeated upper and lower respiratory tract infections, neutrophilic airway inflammation and obstructive airway disease. Different ultrastructural ciliary defects may affect lung function decline to different degrees. Lung clearance index (LCI) is a marker of ventilation inhomogeneity that is raised in some but not all patients with PCD. We hypothesised that PCD patients with microtubular defects would have worse (higher) LCI than other PCD patients...
January 24, 2018: Lung
https://www.readbyqxmd.com/read/29320566/the-effect-of-time-of-day-and-chest-physiotherapy-on-multiple-breath-washout-measures-in-children-with-clinically-stable-cystic-fibrosis
#18
Christian Voldby, Kent Green, Susanne Rosthøj, Thomas Kongstad, Lue Philipsen, Frederik Buchvald, Marianne Skov, Tania Pressler, Per Gustafsson, Kim G Nielsen
BACKGROUND: In this pilot study we investigated daytime variation of multiple breath nitrogen washout (N2MBW) measures in children with clinically stable cystic fibrosis. To our knowledge the effect of time-of-day on multiple breath washout measures in patients with cystic fibrosis has not previously been reported. Furthermore, we assessed the influence of chest physiotherapy on N2MBW measures. METHODS: Ten school children with cystic fibrosis performed N2MBW followed by spirometry and plethysmography in the morning and afternoon at three visits that were one month apart...
2018: PloS One
https://www.readbyqxmd.com/read/29275133/inert-gas-washout-in-bronchiolitis-obliterans-following-hematopoietic-cell-transplantation
#19
Sylvia Nyilas, Luzia Baumeler, Michael Tamm, Jörg P Halter, Spasenija Savic, Insa Korten, Anja Meyer, Florian Singer, Jakob R Passweg, Philipp Latzin, Daiana Stolz
BACKGROUND: Bronchiolitis obliterans syndrome (BOS) is a leading cause of chronic graft-vs-host disease (cGvHD) and is associated with mortality after allogeneic hematopoietic stem cell transplantation (alloHSCT). The nitrogen multiple breath washout test (N2 -MBW) measures ventilation inhomogeneity, a biomarker of central and peripheral airway obstruction. The aim of this study was to examine ventilation inhomogeneity according to cGvHD score and histologically defined bronchiolitis obliterans (BO)...
December 21, 2017: Chest
https://www.readbyqxmd.com/read/29228942/multiple-breath-washout-testing-in-adults-with-pulmonary-disease-and-healthy-controls-can-fewer-measurements-eventually-be-more
#20
Frederik Trinkmann, Johannes Götzmann, Daniel Saur, Michele Schroeter, Katharina Roth, Ksenija Stach, Martin Borggrefe, Joachim Saur, Ibrahim Akin, Julia D Michels
BACKGROUND: Multiple breath washout (MBW) became a valuable research tool assessing ventilation heterogeneity. However, routine clinical application still faces several challenges. Deriving MBW parameters from three technically acceptable measurements according to current recommendations prolongs test times. We therefore aimed to evaluate reporting only duplicate measurements in healthy adults and pulmonary disease. METHODS: One hundred and fifty-three subjects prospectively underwent conventional lung function testing and closed-circuit SF6 -MBW...
December 11, 2017: BMC Pulmonary Medicine
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