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Lung clearance index

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https://www.readbyqxmd.com/read/29449440/lung-clearance-index-to-monitor-treatment-response-in-pulmonary-exacerbations-in-preschool-children-with-cystic-fibrosis
#1
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...
February 15, 2018: Thorax
https://www.readbyqxmd.com/read/29444773/lung-function-inflammation-and-endothelin-1-in-congenital-heart-disease-associated-pulmonary-arterial-hypertension
#2
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
#3
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...
February 1, 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
#4
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...
September 18, 2017: Irish Medical Journal
https://www.readbyqxmd.com/read/29368419/utility-of-single-versus-multiple-breath-washout-in-adult-asthma
#5
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
#6
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
#7
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
#8
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 (BO) syndrome is a leading cause of chronic graft-versus-host disease (cGvHD) and is associated with mortality after allogeneic hematopoietic stem cell transplantation (alloHCT). Nitrogen multiple breath washout test (N2-MBW) measures ventilation inhomogeneity, a biomarker of central and peripheral airways obstruction. The aim of the study was to examine ventilation inhomogeneity according to cGvHD score and histologically defined BO. METHODS: This single center prospective cross-sectional study included 225 adults (mean age 52...
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
#9
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
https://www.readbyqxmd.com/read/29217601/novel-magnetic-resonance-technique-for-functional-imaging-of-cystic-fibrosis-lung-disease
#10
Sylvia Nyilas, Grzegorz Bauman, Gregor Sommer, Enno Stranzinger, Orso Pusterla, Urs Frey, Insa Korten, Florian Singer, Carmen Casaulta, Oliver Bieri, Philipp Latzin
Lung function tests are commonly used to monitor lung disease in cystic fibrosis (CF). While practical, they cannot locate the exact origin of functional impairment. Contemporary magnetic resonance imaging (MRI) techniques provide information on the location of disease but the need for contrast agents constrains their repeated application. We examined the correlation between functional MRI, performed without administration of contrast agent, and lung clearance index (LCI) from nitrogen multiple-breath washout (N2-MBW)...
December 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/29177921/inhibitory-effects-and-related-molecular-mechanisms-of-total-flavonoids-in-mosla-chinensis-maxim-against-h1n1-influenza-virus
#11
Xiao-Xia Zhang, Qiao-Feng Wu, Yun-Liang Yan, Feng-Ling Zhang
OBJECTIVE: The Shixiangru (Mosla chinensis Maxim) total flavonoids (STF) mainly contain luteolin and apigenin. The study aims to examine the inhibitory effects of STF on anti-H1N1 influenza virus and its related molecular mechanisms in pneumonia mice. METHODS: The viral pneumonia mice were treated with Ribavirin or various doses of STF. We observed histological changes of lung by immunohistochemistry and measured lung index to value anti-influenza virus effects of STF...
November 24, 2017: Inflammation Research: Official Journal of the European Histamine Research Society ... [et Al.]
https://www.readbyqxmd.com/read/29176899/supine-posture-changes-lung-volumes-and-increases-ventilation-heterogeneity-in-cystic-fibrosis
#12
Laurie J Smith, Kenneth A Macleod, Guilhem J Collier, Felix C Horn, Helen Sheridan, Ina Aldag, Chris J Taylor, Steve Cunningham, Jim M Wild, Alex Horsley
INTRODUCTION: Lung Clearance Index (LCI) is recognised as an early marker of cystic fibrosis (CF) lung disease. The effect of posture on LCI however is important when considering longitudinal measurements from infancy and when comparing LCI to imaging studies. METHODS: 35 children with CF and 28 healthy controls (HC) were assessed. Multiple breath washout (MBW) was performed both sitting and supine in triplicate and analysed for LCI, Scond, Sacin, and lung volumes...
2017: PloS One
https://www.readbyqxmd.com/read/29157654/an-innovative-lung-model-for-multiple-breath-washout-testing-in-health-and-disease
#13
Pinelopi Anagnostopoulou, Sarah Vomsattel, Anne-Christiane Kentgens, Marisa Guidi, Severin Binggeli, Lena Kohler, Florian Singer, Philipp Latzin, Dominik Obrist
BACKGROUND: Multiple breath washout (MBW) is a lung function test that identifies the degree of ventilation inhomogeneity (VI) in the lungs. In vitro validation of MBW devices is recommended. So far, plastic lung models for MBW validation ignored variable degrees of VI. Our primary aim was to create a plastic lung model applicable for physiological lung volumes and variable VI. METHODS: A plastic box divided in two chambers was filled with water and ventilated in various lung volumes and respiratory rates...
November 10, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29123150/lung-clearance-index-and-quantitative-computed-tomography-of-post-infectious-bronchiolitis-obliterans-in-infants
#14
Yoon Hee Kim, Hyun Joo Shin, In Suk Sol, Soo Yeon Kim, Jong Deok Kim, Haesung Yoon, Kyung Won Kim, Myung-Joon Kim, Mi-Jung Lee, Myung Hyun Sohn
Post-infectious bronchiolitis obliterans (BO) could be diagnosed via spirometry and chest computed tomography (CT); however, these tests are limited in infants. We aimed to evaluate the utility of lung clearance index (LCI) and air-trapping lung volume from chest CT in infants. This prospective study included 20 infants (mean age, 10.9 ± 6.3 months) diagnosed with post-infectious BO between 2009 and 2016. All subjects underwent multiple breath washout tests. For quantitative analysis of chest CT, the mean lung area attenuation value was used as an individual cutoff to determine the air-trapping lung volume...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29122915/elevated-lung-clearance-index-in-infants-with-cystic-fibrosis-shortly-after-birth
#15
Elisabeth Kieninger, Sophie Yammine, Insa Korten, Pinelopi Anagnostopoulou, Florian Singer, Urs Frey, Anne Mornand, Maura Zanolari, Isabelle Rochat, Daniel Trachsel, Dominik Mueller-Suter, Alexander Moeller, Carmen Casaulta, Philipp Latzin
It is not known at what age lung function impairment may arise in children with cystic fibrosis (CF). We assessed lung function shortly after birth in infants with CF diagnosed by newborn screening.We performed infant lung function measurements in a prospective cohort of infants with CF and healthy controls. We assessed lung clearance index (LCI), functional residual capacity (FRC) and tidal breathing parameters. The primary outcome was prevalence and severity of abnormal lung function (±1.64 z-scores) in CF...
November 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/29122914/pulmonary-function-deficits-in-newborn-screened-infants-with-cystic-fibrosis-managed-with-standard-uk-care-are-mild-and-transient
#16
Gwyneth Davies, Janet Stocks, Lena P Thia, Ah-Fong Hoo, Andrew Bush, Paul Aurora, Lucy Brennan, Simon Lee, Sooky Lum, Philippa Cottam, Joanne Miles, Jane Chudleigh, Jane Kirkby, Ian M Balfour-Lynn, Siobhán B Carr, Colin Wallis, Hilary Wyatt, Angie Wade
With the advent of novel designer molecules for cystic fibrosis (CF) treatment, there is huge need for early-life clinical trial outcomes, such as infant lung function (ILF). We investigated the degree and tracking of ILF abnormality during the first 2 years of life in CF newborn screened infants.Forced expiratory volume in 0.5 s (FEV0.5), lung clearance index (LCI) and plethysmographic functional residual capacity were measured at ∼3 months, 1 year and 2 years in 62 infants with CF and 34 controls...
November 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/29020072/correcting-for-tissue-nitrogen-excretion-in-multiple-breath-washout-measurements
#17
Mica Kane, Jonathan H Rayment, Renee Jensen, Reginald McDonald, Sanja Stanojevic, Felix Ratjen
Nitrogen excreted from body tissues impacts the calculation of multiple breath nitrogen washout (MBWN2) outcomes. The aim of this study was to determine the effect of tissue N2 on MBWN2 outcomes in both healthy subjects and patients with CF and to assess whether it is possible to correct for tissue N2. The contribution of tissue N2 to MBWN2 outcomes was estimated by comparing MBWN2-derived functional residual capacity (FRCN2) to FRC measured by body plethysmography (FRCpleth) and by comparing MBW outcome measures derived from MBWN2 and sulfur hexafluoride MBW (MBWSF6)...
2017: PloS One
https://www.readbyqxmd.com/read/28982773/inter-test-reproducibility-of-the-lung-clearance-index-measured-by-multiple-breath-washout
#18
Esther Oude Engberink, Felix Ratjen, Stephanie D Davis, George Retsch-Bogart, Reshma Amin, Sanja Stanojevic
The lung clearance index (LCI) has strong intra-test repeatability; however, the inter-test reproducibility of the LCI is poorly defined.The aim of the present study was to define a physiologically meaningful change in LCI in preschool children, which discriminates changes associated with disease progression from biological variability.Repeated LCI measurements from a longitudinal cohort study of children with cystic fibrosis and age-matched controls were collected to define the inter-visit reproducibility of the LCI...
October 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28950435/lung-clearance-index-lci-as-a-predictor-of-exercise-limitation-among-cf-patients
#19
Vasiliki Avramidou, Elpis Hatziagorou, Asterios Kampouras, Helge Hebestreit, Eleana Kourouki, Fotis Kirvassilis, John Tsanakas
INTRODUCTION: FEV1 is often considered the gold standard to monitor lung disease in cystic fibrosis (CF). Recently, there has been increasing interest in multiple breath washout (MBW) and cardiopulmonary exercise testing (CPET) as alternative or even more sensitive techniques. However, limited data exist on associations among the above methods. AIM: To evaluate the correlations between outcome measures of MBW and CPET and to examine if ventilation inhomogeneity can predict exercise intolerance...
September 26, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28934992/breast-cancer-metastases-to-the-thyroid-gland-an-uncommon-sentinel-for-diffuse-metastatic-disease-a-case-report-and-review-of-the-literature
#20
Agata M Plonczak, Aimee N DiMarco, Roberto Dina, Dorothy M Gujral, Fausto F Palazzo
BACKGROUND: Metastases to the thyroid are rare. The most common primary cancer to metastasize to the thyroid is renal cell carcinoma, followed by malignancies of the gastrointestinal tract, lungs, and skin, with breast cancer metastases to the thyroid being rare. Overall, the outcomes in malignancies that have metastasized to the thyroid are poor. There are no prospective studies addressing the role of surgery in metastatic disease of the thyroid. Isolated thyroidectomy has been proposed as a local disease control option to palliate and prevent the potential morbidity of tumor extension related to the airway...
September 22, 2017: Journal of Medical Case Reports
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