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Safavi S, Dai R, Breton VL, Emmerson MN, Kowalik K, Lu Z, Lou W, Dubeau A, DeLorenzo S, Azad MB, Becker AB, Mandhane PJ, Turvey SE, Gustafsson P, Lefebvre DL, Sears MR, Moraes TJ, Subbarao P. Lung clearance index predicts persistence of preschool wheeze. Pediatr Allergy Immunol 2022; 33:e13713. [PMID: 34875116 DOI: 10.1111/pai.13713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 11/26/2021] [Accepted: 11/30/2021] [Indexed: 11/27/2022]
Abstract
BACKGROUND The lung clearance index (LCI) is a measure of pulmonary function. Variable feasibility (50->80%) in preschool children has been reported. There are limited studies exploring its relationship to respiratory symptoms and how it predicts persistent wheeze. We aimed to assess the association with respiratory symptoms in preschool-aged children with LCI and determine its utility in predicting persistent wheeze. METHODS LCI was measured in a subcohort of the CHILD Cohort Study at age 3 years using SF6 multiple breath washout test mass spectrometry. Respiratory symptom phenotypes at age 3 were derived from children's respiratory symptoms reported by their parents. Responses were used to categorize children into 4 symptom groups: recurrent wheeze (3RW), recurrent cough (3RC), infrequent symptoms (IS), and no current symptoms (NCS). At age 5 years, these children were seen by a specialist clinician and assessed for persistent wheeze (PW). RESULTS At age 3 years, 69% (234/340) had feasible LCI. Excluding two children with missing data, 232 participants were categorized as follows: 33 (14%) 3RW; 28 (12%) 3RC; 17 (7%) IS; and 154 (66%) NCS. LCI z-score at age 3 years was highest in children with 3RW compared to 3RC (mean (SD): 1.14 (1.56) vs. 0.09 (0.95), p < .01), IS (mean (SD): -0.14 (0.59), p < .01), and NCS (mean (SD): -0.08 (1.06), p < .01). LCI z-score at age 3 was predictive of persistent wheeze at age 5 (PW) (AUROC: 0.87). CONCLUSIONS LCI at age 3 was strongly associated with recurrent wheeze at age 3, and predictive of its persistence to age 5.
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Affiliation(s)
- Shahideh Safavi
- Division of Respiratory Medicine, Department of Pediatrics, Hospital for Sick Children & Research Institute, Toronto, Ontario, Canada
| | - Ruixue Dai
- Division of Respiratory Medicine, Department of Pediatrics, Hospital for Sick Children & Research Institute, Toronto, Ontario, Canada
| | - Vanessa L Breton
- Division of Respiratory Medicine, Department of Pediatrics, Hospital for Sick Children & Research Institute, Toronto, Ontario, Canada
| | - Melanie N Emmerson
- Division of Respiratory Medicine, Department of Pediatrics, Hospital for Sick Children & Research Institute, Toronto, Ontario, Canada
| | - Krzysztof Kowalik
- Division of Respiratory Medicine, Department of Pediatrics, Hospital for Sick Children & Research Institute, Toronto, Ontario, Canada.,Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Zihang Lu
- Department of Public Health Sciences, Queen's University, Kingston, Ontario, Canada
| | - Wendy Lou
- Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
| | - Aimée Dubeau
- Division of Respiratory Medicine, Department of Pediatrics, Hospital for Sick Children & Research Institute, Toronto, Ontario, Canada
| | - Stephanie DeLorenzo
- Division of Respiratory Medicine, Department of Pediatrics, Hospital for Sick Children & Research Institute, Toronto, Ontario, Canada
| | - Meghan B Azad
- Department of Pediatrics and Child Health, Children's Hospital Research Institute of Manitoba, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Allan B Becker
- Department of Pediatrics and Child Health, Children's Hospital Research Institute of Manitoba, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Piush J Mandhane
- Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada
| | - Stuart E Turvey
- Department of Pediatrics, Child & Family Research Institute, BC Children's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Per Gustafsson
- Department of Pediatrics, Central Hospital, Skövde, Sweden
| | - Diana L Lefebvre
- Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Malcolm R Sears
- Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Theo J Moraes
- Division of Respiratory Medicine, Department of Pediatrics, Hospital for Sick Children & Research Institute, Toronto, Ontario, Canada
| | - Padmaja Subbarao
- Division of Respiratory Medicine, Department of Pediatrics, Hospital for Sick Children & Research Institute, Toronto, Ontario, Canada.,Department of Physiology, University of Toronto, Toronto, Ontario, Canada.,Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada.,Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada
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Brooke J, Safavi S, Prayle AP, Ng C, Paul J, Bradley C, Cooper A, Munidasa S, Zanette B, Santyr GE, Barr H, Major G, Smyth A, Gowland P, Francis S, Hall IP. Proton MRI assessment of lung structure and function in people with cystic fibrosis. Imaging 2021. [DOI: 10.1183/13993003.congress-2021.pa350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Baskaran V, Lawrence H, Lansbury LE, Webb K, Safavi S, Zainuddin NI, Huq T, Eggleston C, Ellis J, Thakker C, Charles B, Boyd S, Williams T, Phillips C, Redmore E, Platt S, Hamilton E, Barr A, Venyo L, Wilson P, Bewick T, Daniel P, Dark P, Jeans AR, McCanny J, Edgeworth JD, Llewelyn MJ, Schmid ML, McKeever TM, Beed M, Lim WS. Co-infection in critically ill patients with COVID-19: an observational cohort study from England. J Med Microbiol 2021; 70:001350. [PMID: 33861190 PMCID: PMC8289210 DOI: 10.1099/jmm.0.001350] [Citation(s) in RCA: 69] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Accepted: 03/12/2021] [Indexed: 12/22/2022] Open
Abstract
Introduction. During previous viral pandemics, reported co-infection rates and implicated pathogens have varied. In the 1918 influenza pandemic, a large proportion of severe illness and death was complicated by bacterial co-infection, predominantly Streptococcus pneumoniae and Staphylococcus aureus.Gap statement. A better understanding of the incidence of co-infection in patients with COVID-19 infection and the pathogens involved is necessary for effective antimicrobial stewardship.Aim. To describe the incidence and nature of co-infection in critically ill adults with COVID-19 infection in England.Methodology. A retrospective cohort study of adults with COVID-19 admitted to seven intensive care units (ICUs) in England up to 18 May 2020, was performed. Patients with completed ICU stays were included. The proportion and type of organisms were determined at <48 and >48 h following hospital admission, corresponding to community and hospital-acquired co-infections.Results. Of 254 patients studied (median age 59 years (IQR 49-69); 64.6 % male), 139 clinically significant organisms were identified from 83 (32.7 %) patients. Bacterial co-infections/ co-colonisation were identified within 48 h of admission in 14 (5.5 %) patients; the commonest pathogens were Staphylococcus aureus (four patients) and Streptococcus pneumoniae (two patients). The proportion of pathogens detected increased with duration of ICU stay, consisting largely of Gram-negative bacteria, particularly Klebsiella pneumoniae and Escherichia coli. The co-infection/ co-colonisation rate >48 h after admission was 27/1000 person-days (95 % CI 21.3-34.1). Patients with co-infections/ co-colonisation were more likely to die in ICU (crude OR 1.78,95 % CI 1.03-3.08, P=0.04) compared to those without co-infections/ co-colonisation.Conclusion. We found limited evidence for community-acquired bacterial co-infection in hospitalised adults with COVID-19, but a high rate of Gram-negative infection acquired during ICU stay.
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Affiliation(s)
- Vadsala Baskaran
- Department of Respiratory Medicine, Nottingham University Hospital NHS Trust, Nottingham NG5 1PB, UK
- Division of Epidemiology and Public Health, School of Medicine, University of Nottingham, Clinical Sciences Building, Nottingham City Hospital Campus, Hucknall Road, Nottingham NG5 1PB, UK
- NIHR Nottingham Biomedical Research Centre, Queen’s Medical Centre, Nottingham NG7 2UH, UK
| | - Hannah Lawrence
- Department of Respiratory Medicine, Nottingham University Hospital NHS Trust, Nottingham NG5 1PB, UK
- Division of Epidemiology and Public Health, School of Medicine, University of Nottingham, Clinical Sciences Building, Nottingham City Hospital Campus, Hucknall Road, Nottingham NG5 1PB, UK
- NIHR Nottingham Biomedical Research Centre, Queen’s Medical Centre, Nottingham NG7 2UH, UK
| | - Louise E. Lansbury
- Division of Epidemiology and Public Health, School of Medicine, University of Nottingham, Clinical Sciences Building, Nottingham City Hospital Campus, Hucknall Road, Nottingham NG5 1PB, UK
| | - Karmel Webb
- Division of Epidemiology and Public Health, School of Medicine, University of Nottingham, Clinical Sciences Building, Nottingham City Hospital Campus, Hucknall Road, Nottingham NG5 1PB, UK
| | - Shahideh Safavi
- NIHR Nottingham Biomedical Research Centre, Queen’s Medical Centre, Nottingham NG7 2UH, UK
- Division of Respiratory Medicine, School of Medicine, University of Nottingham, Queens Medical Centre, Derby Rd, Nottingham NG7 2UH, UK
| | - Nurul I. Zainuddin
- Department of Respiratory Medicine, Nottingham University Hospital NHS Trust, Nottingham NG5 1PB, UK
| | - Tausif Huq
- Department of Respiratory Medicine, Nottingham University Hospital NHS Trust, Nottingham NG5 1PB, UK
| | - Charlotte Eggleston
- Department of Respiratory Medicine, Nottingham University Hospital NHS Trust, Nottingham NG5 1PB, UK
| | - Jayne Ellis
- University College London Hospitals NHS Foundation Trust, 250 Euston Rd, London NW1 2PG, UK
| | - Clare Thakker
- University College London Hospitals NHS Foundation Trust, 250 Euston Rd, London NW1 2PG, UK
| | - Bethan Charles
- Salford Royal NHS Foundation Trust, Stott Ln, Salford M6 8HD, UK
| | - Sara Boyd
- Guy’s and St Thomas’ NHS Foundation Trust, Great Maze Pond, London SE1 9RT, UK
- Antimicrobial Pharmacodynamics and Therapeutics, Department of Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, L69 3GE, UK
| | - Tom Williams
- Guy’s and St Thomas’ NHS Foundation Trust, Great Maze Pond, London SE1 9RT, UK
| | - Claire Phillips
- Brighton and Sussex University Hospitals NHS trust, Eastern Road, Brighton BN2 1ES, UK
| | - Ethan Redmore
- Brighton and Sussex University Hospitals NHS trust, Eastern Road, Brighton BN2 1ES, UK
| | - Sarah Platt
- Newcastle Upon Tyne Hospitals NHS Foundation Trust, Freeman Rd, High Heaton, Newcastle upon Tyne NE7 7DN, UK
| | - Eve Hamilton
- Newcastle Upon Tyne Hospitals NHS Foundation Trust, Freeman Rd, High Heaton, Newcastle upon Tyne NE7 7DN, UK
| | - Andrew Barr
- Newcastle Upon Tyne Hospitals NHS Foundation Trust, Freeman Rd, High Heaton, Newcastle upon Tyne NE7 7DN, UK
| | - Lucy Venyo
- Newcastle Upon Tyne Hospitals NHS Foundation Trust, Freeman Rd, High Heaton, Newcastle upon Tyne NE7 7DN, UK
| | - Peter Wilson
- University College London Hospitals NHS Foundation Trust, 250 Euston Rd, London NW1 2PG, UK
| | - Tom Bewick
- University Hospitals of Derby and Burton NHS Foundation Trust, Uttoxeter Road, Derby DE22 3NE, UK
| | - Priya Daniel
- University Hospitals of Derby and Burton NHS Foundation Trust, Uttoxeter Road, Derby DE22 3NE, UK
| | - Paul Dark
- Salford Royal NHS Foundation Trust, Stott Ln, Salford M6 8HD, UK
- Division of Infection, Immunity and Respiratory Medicine, NIHR Manchester Biomedical Research Centre, University of Manchester, Manchester, M23 9PT, UK
| | - Adam R. Jeans
- Salford Royal NHS Foundation Trust, Stott Ln, Salford M6 8HD, UK
| | - Jamie McCanny
- Guy’s and St Thomas’ NHS Foundation Trust, Great Maze Pond, London SE1 9RT, UK
| | | | - Martin J. Llewelyn
- Brighton and Sussex University Hospitals NHS trust, Eastern Road, Brighton BN2 1ES, UK
| | - Matthias L. Schmid
- Newcastle Upon Tyne Hospitals NHS Foundation Trust, Freeman Rd, High Heaton, Newcastle upon Tyne NE7 7DN, UK
| | - Tricia M. McKeever
- Division of Epidemiology and Public Health, School of Medicine, University of Nottingham, Clinical Sciences Building, Nottingham City Hospital Campus, Hucknall Road, Nottingham NG5 1PB, UK
- NIHR Nottingham Biomedical Research Centre, Queen’s Medical Centre, Nottingham NG7 2UH, UK
| | - Martin Beed
- Department of Critical Care, Nottingham University Hospital NHS Trust, Nottingham NG5 1PB, UK
- Division of Anaesthesia, School of Medicine, University of Nottingham, Queens Medical Centre, Derby Rd, Nottingham NG7 2UH, UK
| | - Wei Shen Lim
- Department of Respiratory Medicine, Nottingham University Hospital NHS Trust, Nottingham NG5 1PB, UK
- NIHR Nottingham Biomedical Research Centre, Queen’s Medical Centre, Nottingham NG7 2UH, UK
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Safavi S, Munidasa S, Zanette B, Dai R, Stirrat E, Li D, Moraes TJ, Subbarao P, Santyr G. Evaluating post-bronchodilator response in well-controlled paediatric severe asthma using hyperpolarised 129Xe-MRI: A pilot study. Respir Med 2021; 180:106368. [PMID: 33740737 DOI: 10.1016/j.rmed.2021.106368] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 03/05/2021] [Accepted: 03/06/2021] [Indexed: 02/08/2023]
Abstract
INTRODUCTION Pulmonary function tests (PFTs) are the main objective measures used to assess asthma in children. However, PFTs provide a global measure of lung function. Hyperpolarised xenon-129 magnetic resonance imaging (129Xe-MRI) can assess lung function spatially. This cross-sectional cohort study aimed to evaluate the use of 129Xe-MRI in detecting ventilation abnormalities in children with well-controlled severe asthma pre- and post-bronchodilator (BD). METHOD Six healthy children (aged 11 ± 3) and six with well-controlled severe asthma (14 ± 1) underwent spirometry, multiple breath washout (MBW), and 129Xe-MRI. These tests were repeated post-BD in the asthma cohort. Image analysis was performed in MATLAB. Wilcoxon signed-rank test, repeated measures analysis of variance (ANOVA), and Spearman's rank correlation coefficient were used for statistical analysis. RESULTS A significantly higher number of ventilation defects were found in the asthma cohort pre-BD compared to the healthy participants and post-BD within the asthma cohort (p = 0.02 and 0.01). A greater number of wedge-shaped defects were detected in the asthma cohort pre-BD compared to healthy participants and post-BD within the asthma cohort (p = 0.01 and 0.008, respectively). 129Xe ventilation defect percentage (VDP) and coefficient of variation (CoV) were significantly higher in the asthma cohort pre-BD compared to the healthy cohort (p = 0.006 for both). VDP and CoV were reduced significantly post-BD in the asthma cohort, to a level where there was no longer a significant difference between the two cohorts. CONCLUSION 129Xe-MRI is a sensitive marker of ventilation inhomogeneity in paediatric severe asthma and may potentially be used as a biomarker to assess disease progression and therapeutic response.
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Affiliation(s)
- Shahideh Safavi
- Respiratory Medicine Department, School of Medicine, University of Nottingham,Queen's Medical Centre Campus, Nottingham, UK; NIHR Nottingham Biomedical Research Centre, Queen's Medical Centre, Nottingham, UK.
| | - Samal Munidasa
- The Translational Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada; Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada.
| | - Brandon Zanette
- The Translational Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada.
| | - Ruixue Dai
- Division of Respiratory Medicine, Department of Paediatrics, SickKids Research Institute, The Hospital for Sick Children, Toronto, ON, Canada.
| | - Elaine Stirrat
- The Translational Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada.
| | - Daniel Li
- The Translational Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada.
| | - Theo J Moraes
- The Translational Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada; Division of Respiratory Medicine, Department of Paediatrics, SickKids Research Institute, The Hospital for Sick Children, Toronto, ON, Canada.
| | - Padmaja Subbarao
- The Translational Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada; Division of Respiratory Medicine, Department of Paediatrics, SickKids Research Institute, The Hospital for Sick Children, Toronto, ON, Canada.
| | - Giles Santyr
- The Translational Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada; Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada.
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Brooke J, Safavi S, Prayle A, Ng C, Alappadan J, Bradley C, Cooper A, Munidasa S, Zanette B, Santyr G, Barr H, Major G, Smyth A, Gowland P, Francis S, Hall I. P109 Regional assessment of lung function using non-contrast MRI in people with cystic fibrosis. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)01135-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Safavi S, Prayle AP, Hall IP, Parmar J. Azithromycin for treatment of bronchiolitis obliterans syndrome in adult lung transplant recipients. Hippokratia 2020. [DOI: 10.1002/14651858.cd012782.pub2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Shahideh Safavi
- Department of Respiratory Medicine; School of Medicine, University of Nottingham; Nottingham UK
| | - Andrew P Prayle
- Department of Child Health, School of Clinical Sciences; University of Nottingham; Nottingham UK
| | - Ian P Hall
- Department of Respiratory Medicine; School of Medicine, University of Nottingham; Nottingham UK
| | - Jasvir Parmar
- Department of Transplantation; Papworth Hospital; Cambridge UK
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Safavi S, Arthofer C, Cooper A, Harkin JW, Prayle AP, Sovani MP, Bolton CE, Gowland PA, Hall IP. Assessing the impact of posture on diaphragm morphology and function using an open upright MRI system-A pilot study. Eur J Radiol 2020; 130:109196. [PMID: 32739780 DOI: 10.1016/j.ejrad.2020.109196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 06/19/2020] [Accepted: 07/21/2020] [Indexed: 10/23/2022]
Abstract
PURPOSE The diaphragm is the most important muscle of respiration. Disorders of the diaphragm can have a deleterious impact on respiratory function. We aimed to evaluate the use of an open-configuration upright low-field MRI system to assess diaphragm morphology and function in patients with bilateral diaphragm weakness (BDW) and chronic obstructive pulmonary disease (COPD) with hyperinflation. METHOD The study was approved by the National Research Ethics Committee, and written consent was obtained. We recruited 20 healthy adult volunteers, six subjects with BDW, and five subjects with COPD with hyperinflation. We measured their vital capacity in the upright and supine position, after which they were scanned on the 0.5 T MRI system during 10-s breath-holds at end-expiration and end-inspiration in both positions. We developed and applied image analysis methods to measure the volume under the dome, maximum excursion of hemidiaphragms, and anterior-posterior and left-right extension of the diaphragm. RESULTS All participants were able to complete the scanning protocol. The patients found scanning in the upright position more comfortable than the supine position. All differences in the supine inspiratory-expiratory parameters, excluding left-right extension, were significantly smaller in the BDW and COPD groups compared with healthy volunteers. No significant correlation was found between the postural change in diaphragm morphology and vital capacity in either group. CONCLUSION Our combined upright-supine MR imaging approach facilitates the assessment of the impact of posture on diaphragm morphology and function in patients with BDW and those with COPD with hyperinflation.
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Affiliation(s)
- Shahideh Safavi
- Respiratory Medicine Department, School of Medicine, University of Nottingham, Queen's Medical Centre Campus, Nottingham, UK; NIHR Nottingham Biomedical Research Centre, Queen's Medical Centre, Nottingham NG7 2UH, UK.
| | - Christoph Arthofer
- NIHR Nottingham Biomedical Research Centre, Queen's Medical Centre, Nottingham NG7 2UH, UK; Sir Peter Mansfield Imaging Centre, University of Nottingham, University Park, Nottingham, UK.
| | - Andrew Cooper
- Sir Peter Mansfield Imaging Centre, University of Nottingham, University Park, Nottingham, UK.
| | - James W Harkin
- Respiratory Medicine Department, School of Medicine, University of Nottingham, Queen's Medical Centre Campus, Nottingham, UK.
| | - Andrew P Prayle
- Paediatric Respiratory Medicine Department, Queen's Medical Centre, Nottingham, UK.
| | - Milind P Sovani
- Respiratory Medicine Department, Queen's Medical Centre, Nottingham University Hospitals NHS Trust, Nottingham, UK.
| | - Charlotte E Bolton
- NIHR Nottingham Biomedical Research Centre, Queen's Medical Centre, Nottingham NG7 2UH, UK; Respiratory Medicine, School of Medicine, University of Nottingham, Nottingham City Hospital Campus, Hucknall Road, Nottingham, UK.
| | - Penny A Gowland
- Sir Peter Mansfield Imaging Centre, University of Nottingham, University Park, Nottingham, UK.
| | - Ian P Hall
- Respiratory Medicine Department, School of Medicine, University of Nottingham, Queen's Medical Centre Campus, Nottingham, UK; NIHR Nottingham Biomedical Research Centre, Queen's Medical Centre, Nottingham NG7 2UH, UK.
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Kowalik K, Dai R, Safavi S, Reyna ME, Lou W, Lepine C, McDonald E, Schaap MJ, Brydges MG, Dubeau A, Boutis K, Narang I, Eiwegger T, Moraes TJ, Ratjen F, Subbarao P. Persistent ventilation inhomogeneity after an acute exacerbation in preschool children with recurrent wheezing. Pediatr Allergy Immunol 2020; 31:608-615. [PMID: 32160369 DOI: 10.1111/pai.13245] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 03/02/2020] [Accepted: 03/04/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND Preschool children with recurrent wheezing suffer high morbidity. It is unclear whether objective measures of asthma control, such as pulmonary function tests (PFTs), provide additional information to the clinical assessment. METHODS We recruited children between 3 and 6 years old, with a history of recurrent wheezing in the preceding year and treated for acute wheezing exacerbation in the emergency department (ED) into an observational cohort study. Children attended two outpatient visits: the first study visit within five days of discharge from the ED and the second study visit 12 weeks after the ED visit. We performed standardized symptom score (test for respiratory and asthma control in kids (TRACK)), multiple breath washout (MBW), spirometry, and clinical assessment at both visits. RESULTS Seventy-four children, mean (standard deviation (SD)) age of 4.32 years (0.84), attended both visits. Paired FEV0.75 and lung clearance index (LCI) measurements at both time points were obtained in 37 and 34 subjects, respectively. Feasibility for all tests improved at visit 2 and was not age-dependent. At the second study visit, a third had controlled asthma based on the TRACK score, and the mean lung clearance index (LCI) improved from 9.86 to 8.31 (P = .003); however, 46% had an LCI in the abnormal range. FEV0.75 z-score improved from -1.66 to -1.17 (P = .05) but remained in the abnormal range in 24%. LCI was abnormal in more than half of the children with "well-controlled" asthma based on the TRACK score. There was no correlation between PFT measures and TRACK scores at either visit. CONCLUSIONS Lung clearance index demonstrates a persistent deficit post-exacerbation in a large proportion of preschoolers with recurrent wheezing, highlighting that symptom scores alone may not suffice for monitoring these children.
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Affiliation(s)
- Krzysztof Kowalik
- Division of Respiratory Medicine, Department of Paediatrics, Program in Translational Medicine, SickKids Research Institute, The Hospital for Sick Children, Toronto, Canada
| | - Ruixue Dai
- Division of Respiratory Medicine, Department of Paediatrics, Program in Translational Medicine, SickKids Research Institute, The Hospital for Sick Children, Toronto, Canada
| | - Shahideh Safavi
- Respiratory Medicine Department, Queen's Medical Centre, University of Nottingham School of Medicine, Nottingham, UK
| | - Myrtha E Reyna
- Division of Respiratory Medicine, Department of Paediatrics, Program in Translational Medicine, SickKids Research Institute, The Hospital for Sick Children, Toronto, Canada
| | - Wendy Lou
- Dalla Lana School of Public Health, Division of Biostatistics, University of Toronto, Toronto, Canada
| | - Claire Lepine
- Division of Respiratory Medicine, Department of Paediatrics, Program in Translational Medicine, SickKids Research Institute, The Hospital for Sick Children, Toronto, Canada
| | - Erica McDonald
- Division of Respiratory Medicine, Department of Paediatrics, Program in Translational Medicine, SickKids Research Institute, The Hospital for Sick Children, Toronto, Canada
| | - Mirjam J Schaap
- Division of Respiratory Medicine, Department of Paediatrics, Program in Translational Medicine, SickKids Research Institute, The Hospital for Sick Children, Toronto, Canada.,Division of Respiratory Medicine and Allergy, Department of Pediatrics, Radboud University Medical Center Amalia Children's Hospital, Nijmegen, The Netherlands
| | - May G Brydges
- Division of Respiratory Medicine, Department of Paediatrics, Program in Translational Medicine, SickKids Research Institute, The Hospital for Sick Children, Toronto, Canada
| | - Aimee Dubeau
- Division of Respiratory Medicine, Department of Paediatrics, Program in Translational Medicine, SickKids Research Institute, The Hospital for Sick Children, Toronto, Canada
| | - Kathy Boutis
- Division of Paediatric Emergency Medicine, Department of Paediatrics, Program in Child Health Evaluative Sciences, SickKids Research Institute, The Hospital for Sick Children, University of Toronto, Toronto, Canada
| | - Indra Narang
- Division of Respiratory Medicine, Department of Paediatrics, Program in Translational Medicine, SickKids Research Institute, The Hospital for Sick Children, Toronto, Canada
| | - Thomas Eiwegger
- Division of Immunology & Allergy, Department of Paediatrics, Program in Translational Medicine, SickKids Research Institute, The Hospital for Sick Children, University of Toronto, Toronto, Canada
| | - Theo J Moraes
- Division of Respiratory Medicine, Department of Paediatrics, Program in Translational Medicine, SickKids Research Institute, The Hospital for Sick Children, Toronto, Canada
| | - Felix Ratjen
- Division of Respiratory Medicine, Department of Paediatrics, Program in Translational Medicine, SickKids Research Institute, The Hospital for Sick Children, Toronto, Canada
| | - Padmaja Subbarao
- Division of Respiratory Medicine, Department of Paediatrics, Program in Translational Medicine, SickKids Research Institute, The Hospital for Sick Children, Toronto, Canada.,Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Canada.,Dalla Lana School of Public Health, Division of Epidemiology, University of Toronto, Toronto, Canada
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Safavi S, Zanette B, Munidasa S, Stirrat E, Li D, Subbarao P, Santyr G. HYPERPOLARISED XENON-129 MAGNETIC RESONANCE IMAGING (129XE-MRI) OF THE LUNGS IN CHILDREN WITH SEVERE ASTHMA. Chest 2020. [DOI: 10.1016/j.chest.2020.05.253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Safavi S, Arthofer C, Cooper A, Harkin J, Prayle A, Sovani M, Bolton C, Gowland P, Hall I. Using an upright MRI system to assess the impact of posture on diaphragm morphology. Imaging 2019. [DOI: 10.1183/13993003.congress-2019.pa3165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Affiliation(s)
- Shahideh Safavi
- School of Medicine, University of Nottingham; Department of Respiratory Medicine; Nottingham UK
| | - Andrew P Prayle
- University of Nottingham; Department of Child Health, School of Clinical Sciences; E Floor East Block, Queens Medical Centre Derby Road Nottingham UK NG7 2UH
| | - Ian P Hall
- School of Medicine, University of Nottingham; Department of Respiratory Medicine; Nottingham UK
| | - Jasvir Parmar
- Papworth Hospital; Department of Transplantation; Papworth Everard Cambridge UK CB23 3RE
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Safavi S, Arthofer C, Thorpe J, Barlow M, Hall I. Reproducibility of hyperpolarised xenon-129 MRI (129Xe-MRI) of lungs in healthy volunteers. Imaging 2017. [DOI: 10.1183/1393003.congress-2017.pa3743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Barskiy DA, Coffey AM, Nikolaou P, Mikhaylov DM, Goodson BM, Branca RT, Lu GJ, Shapiro MG, Telkki VV, Zhivonitko VV, Koptyug IV, Salnikov OG, Kovtunov KV, Bukhtiyarov VI, Rosen MS, Barlow MJ, Safavi S, Hall IP, Schröder L, Chekmenev EY. Frontispiece: NMR Hyperpolarization Techniques of Gases. Chemistry 2017. [DOI: 10.1002/chem.201780461] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Danila A. Barskiy
- Department of Radiology, Department of Biomedical Engineering; Department of Physics, Vanderbilt-Ingram Cancer Center (VICC); Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University; Nashville TN 37232 USA
| | - Aaron M. Coffey
- Department of Radiology, Department of Biomedical Engineering; Department of Physics, Vanderbilt-Ingram Cancer Center (VICC); Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University; Nashville TN 37232 USA
| | - Panayiotis Nikolaou
- Department of Radiology, Department of Biomedical Engineering; Department of Physics, Vanderbilt-Ingram Cancer Center (VICC); Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University; Nashville TN 37232 USA
| | | | - Boyd M. Goodson
- Southern Illinois University; Department of Chemistry and Biochemistry, Materials Technology Center; Carbondale IL 62901 USA
| | - Rosa T. Branca
- Department of Physics and Astronomy, Biomedical Research Imaging Center; University of North Carolina at Chapel Hill; Chapel Hill NC 27599 USA
| | - George J. Lu
- Division of Chemistry and Chemical Engineering; California Institute of Technology; Pasadena CA 91125 USA
| | - Mikhail G. Shapiro
- Division of Chemistry and Chemical Engineering; California Institute of Technology; Pasadena CA 91125 USA
| | | | - Vladimir V. Zhivonitko
- International Tomography Center SB RAS; 630090 Novosibirsk Russia
- Novosibirsk State University; Pirogova St. 2 630090 Novosibirsk Russia
| | - Igor V. Koptyug
- International Tomography Center SB RAS; 630090 Novosibirsk Russia
- Novosibirsk State University; Pirogova St. 2 630090 Novosibirsk Russia
| | - Oleg G. Salnikov
- International Tomography Center SB RAS; 630090 Novosibirsk Russia
- Novosibirsk State University; Pirogova St. 2 630090 Novosibirsk Russia
| | - Kirill V. Kovtunov
- International Tomography Center SB RAS; 630090 Novosibirsk Russia
- Novosibirsk State University; Pirogova St. 2 630090 Novosibirsk Russia
| | - Valerii I. Bukhtiyarov
- Boreskov Institute of Catalysis SB RAS; 5 Acad. Lavrentiev Pr. 630090 Novosibirsk Russia
| | - Matthew S. Rosen
- MGH/A.A. Martinos Center for Biomedical Imaging; Boston MA 02129 USA
| | - Michael J. Barlow
- Respiratory Medicine Department, Queen's Medical Centre; University of Nottingham Medical School; Nottingham NG7 2UH UK
| | - Shahideh Safavi
- Respiratory Medicine Department, Queen's Medical Centre; University of Nottingham Medical School; Nottingham NG7 2UH UK
| | - Ian P. Hall
- Respiratory Medicine Department, Queen's Medical Centre; University of Nottingham Medical School; Nottingham NG7 2UH UK
| | - Leif Schröder
- Molecular Imaging, Department of Structural Biology; Leibniz-Institut für Molekulare Pharmakologie (FMP); 13125 Berlin Germany
| | - Eduard Y. Chekmenev
- Department of Radiology, Department of Biomedical Engineering; Department of Physics, Vanderbilt-Ingram Cancer Center (VICC); Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University; Nashville TN 37232 USA
- Russian Academy of Sciences; 119991 Moscow Russia
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Barskiy DA, Coffey AM, Nikolaou P, Mikhaylov DM, Goodson BM, Branca RT, Lu GJ, Shapiro MG, Telkki VV, Zhivonitko VV, Koptyug IV, Salnikov OG, Kovtunov KV, Bukhtiyarov VI, Rosen MS, Barlow MJ, Safavi S, Hall IP, Schröder L, Chekmenev EY. NMR Hyperpolarization Techniques of Gases. Chemistry 2017; 23:725-751. [PMID: 27711999 PMCID: PMC5462469 DOI: 10.1002/chem.201603884] [Citation(s) in RCA: 109] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2016] [Indexed: 01/09/2023]
Abstract
Nuclear spin polarization can be significantly increased through the process of hyperpolarization, leading to an increase in the sensitivity of nuclear magnetic resonance (NMR) experiments by 4-8 orders of magnitude. Hyperpolarized gases, unlike liquids and solids, can often be readily separated and purified from the compounds used to mediate the hyperpolarization processes. These pure hyperpolarized gases enabled many novel MRI applications including the visualization of void spaces, imaging of lung function, and remote detection. Additionally, hyperpolarized gases can be dissolved in liquids and can be used as sensitive molecular probes and reporters. This Minireview covers the fundamentals of the preparation of hyperpolarized gases and focuses on selected applications of interest to biomedicine and materials science.
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Affiliation(s)
- Danila A Barskiy
- Department of Radiology, Department of Biomedical Engineering, Department of Physics, Vanderbilt-Ingram Cancer Center (VICC), Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University, Nashville, TN, 37232, USA
| | - Aaron M Coffey
- Department of Radiology, Department of Biomedical Engineering, Department of Physics, Vanderbilt-Ingram Cancer Center (VICC), Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University, Nashville, TN, 37232, USA
| | - Panayiotis Nikolaou
- Department of Radiology, Department of Biomedical Engineering, Department of Physics, Vanderbilt-Ingram Cancer Center (VICC), Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University, Nashville, TN, 37232, USA
| | | | - Boyd M Goodson
- Southern Illinois University, Department of Chemistry and Biochemistry, Materials Technology Center, Carbondale, IL, 62901, USA
| | - Rosa T Branca
- Department of Physics and Astronomy, Biomedical Research Imaging Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - George J Lu
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Mikhail G Shapiro
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
| | | | - Vladimir V Zhivonitko
- International Tomography Center SB RAS, 630090, Novosibirsk, Russia
- Novosibirsk State University, Pirogova St. 2, 630090, Novosibirsk, Russia
| | - Igor V Koptyug
- International Tomography Center SB RAS, 630090, Novosibirsk, Russia
- Novosibirsk State University, Pirogova St. 2, 630090, Novosibirsk, Russia
| | - Oleg G Salnikov
- International Tomography Center SB RAS, 630090, Novosibirsk, Russia
- Novosibirsk State University, Pirogova St. 2, 630090, Novosibirsk, Russia
| | - Kirill V Kovtunov
- International Tomography Center SB RAS, 630090, Novosibirsk, Russia
- Novosibirsk State University, Pirogova St. 2, 630090, Novosibirsk, Russia
| | - Valerii I Bukhtiyarov
- Boreskov Institute of Catalysis SB RAS, 5 Acad. Lavrentiev Pr., 630090, Novosibirsk, Russia
| | - Matthew S Rosen
- MGH/A.A. Martinos Center for Biomedical Imaging, Boston, MA, 02129, USA
| | - Michael J Barlow
- Respiratory Medicine Department, Queen's Medical Centre, University of Nottingham Medical School, Nottingham, NG7 2UH, UK
| | - Shahideh Safavi
- Respiratory Medicine Department, Queen's Medical Centre, University of Nottingham Medical School, Nottingham, NG7 2UH, UK
| | - Ian P Hall
- Respiratory Medicine Department, Queen's Medical Centre, University of Nottingham Medical School, Nottingham, NG7 2UH, UK
| | - Leif Schröder
- Molecular Imaging, Department of Structural Biology, Leibniz-Institut für Molekulare Pharmakologie (FMP), 13125, Berlin, Germany
| | - Eduard Y Chekmenev
- Department of Radiology, Department of Biomedical Engineering, Department of Physics, Vanderbilt-Ingram Cancer Center (VICC), Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University, Nashville, TN, 37232, USA
- Russian Academy of Sciences, 119991, Moscow, Russia
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Barskiy DA, Coffey AM, Nikolaou P, Mikhaylov DM, Goodson BM, Branca RT, Lu GJ, Shapiro MG, Telkki VV, Zhivonitko VV, Koptyug IV, Salnikov OG, Kovtunov KV, Bukhtiyarov VI, Rosen MS, Barlow MJ, Safavi S, Hall IP, Schröder L, Chekmenev EY. Cover Picture: NMR Hyperpolarization Techniques of Gases (Chem. Eur. J. 4/2017). Chemistry 2017. [DOI: 10.1002/chem.201604810] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Danila A. Barskiy
- Department of Radiology, Department of Biomedical Engineering; Department of Physics, Vanderbilt-Ingram Cancer Center (VICC); Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University; Nashville TN 37232 USA
| | - Aaron M. Coffey
- Department of Radiology, Department of Biomedical Engineering; Department of Physics, Vanderbilt-Ingram Cancer Center (VICC); Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University; Nashville TN 37232 USA
| | - Panayiotis Nikolaou
- Department of Radiology, Department of Biomedical Engineering; Department of Physics, Vanderbilt-Ingram Cancer Center (VICC); Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University; Nashville TN 37232 USA
| | | | - Boyd M. Goodson
- Southern Illinois University; Department of Chemistry and Biochemistry, Materials Technology Center; Carbondale IL 62901 USA
| | - Rosa T. Branca
- Department of Physics and Astronomy, Biomedical Research Imaging Center; University of North Carolina at Chapel Hill; Chapel Hill NC 27599 USA
| | - George J. Lu
- Division of Chemistry and Chemical Engineering; California Institute of Technology; Pasadena CA 91125 USA
| | - Mikhail G. Shapiro
- Division of Chemistry and Chemical Engineering; California Institute of Technology; Pasadena CA 91125 USA
| | | | - Vladimir V. Zhivonitko
- International Tomography Center SB RAS; 630090 Novosibirsk Russia
- Novosibirsk State University; Pirogova St. 2 630090 Novosibirsk Russia
| | - Igor V. Koptyug
- International Tomography Center SB RAS; 630090 Novosibirsk Russia
- Novosibirsk State University; Pirogova St. 2 630090 Novosibirsk Russia
| | - Oleg G. Salnikov
- International Tomography Center SB RAS; 630090 Novosibirsk Russia
- Novosibirsk State University; Pirogova St. 2 630090 Novosibirsk Russia
| | - Kirill V. Kovtunov
- International Tomography Center SB RAS; 630090 Novosibirsk Russia
- Novosibirsk State University; Pirogova St. 2 630090 Novosibirsk Russia
| | - Valerii I. Bukhtiyarov
- Boreskov Institute of Catalysis SB RAS; 5 Acad. Lavrentiev Pr. 630090 Novosibirsk Russia
| | - Matthew S. Rosen
- MGH/A.A. Martinos Center for Biomedical Imaging; Boston MA 02129 USA
| | - Michael J. Barlow
- Respiratory Medicine Department, Queen's Medical Centre; University of Nottingham Medical School; Nottingham NG7 2UH UK
| | - Shahideh Safavi
- Respiratory Medicine Department, Queen's Medical Centre; University of Nottingham Medical School; Nottingham NG7 2UH UK
| | - Ian P. Hall
- Respiratory Medicine Department, Queen's Medical Centre; University of Nottingham Medical School; Nottingham NG7 2UH UK
| | - Leif Schröder
- Molecular Imaging, Department of Structural Biology; Leibniz-Institut für Molekulare Pharmakologie (FMP); 13125 Berlin Germany
| | - Eduard Y. Chekmenev
- Department of Radiology, Department of Biomedical Engineering; Department of Physics, Vanderbilt-Ingram Cancer Center (VICC); Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University; Nashville TN 37232 USA
- Russian Academy of Sciences; 119991 Moscow Russia
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Barskiy DA, Coffey AM, Nikolaou P, Mikhaylov DM, Goodson BM, Branca RT, Lu GJ, Shapiro MG, Telkki VV, Zhivonitko VV, Koptyug IV, Salnikov OG, Kovtunov KV, Bukhtiyarov VI, Rosen MS, Barlow MJ, Safavi S, Hall IP, Schröder L, Chekmenev EY. NMR Hyperpolarization Techniques of Gases. Chemistry 2016. [DOI: 10.1002/chem.201604827] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Danila A. Barskiy
- Department of Radiology, Department of Biomedical Engineering; Department of Physics, Vanderbilt-Ingram Cancer Center (VICC); Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University; Nashville TN 37232 USA
| | - Aaron M. Coffey
- Department of Radiology, Department of Biomedical Engineering; Department of Physics, Vanderbilt-Ingram Cancer Center (VICC); Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University; Nashville TN 37232 USA
| | - Panayiotis Nikolaou
- Department of Radiology, Department of Biomedical Engineering; Department of Physics, Vanderbilt-Ingram Cancer Center (VICC); Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University; Nashville TN 37232 USA
| | | | - Boyd M. Goodson
- Southern Illinois University; Department of Chemistry and Biochemistry, Materials Technology Center; Carbondale IL 62901 USA
| | - Rosa T. Branca
- Department of Physics and Astronomy, Biomedical Research Imaging Center; University of North Carolina at Chapel Hill; Chapel Hill NC 27599 USA
| | - George J. Lu
- Division of Chemistry and Chemical Engineering; California Institute of Technology; Pasadena CA 91125 USA
| | - Mikhail G. Shapiro
- Division of Chemistry and Chemical Engineering; California Institute of Technology; Pasadena CA 91125 USA
| | | | - Vladimir V. Zhivonitko
- International Tomography Center SB RAS; 630090 Novosibirsk Russia
- Novosibirsk State University; Pirogova St. 2 630090 Novosibirsk Russia
| | - Igor V. Koptyug
- International Tomography Center SB RAS; 630090 Novosibirsk Russia
- Novosibirsk State University; Pirogova St. 2 630090 Novosibirsk Russia
| | - Oleg G. Salnikov
- International Tomography Center SB RAS; 630090 Novosibirsk Russia
- Novosibirsk State University; Pirogova St. 2 630090 Novosibirsk Russia
| | - Kirill V. Kovtunov
- International Tomography Center SB RAS; 630090 Novosibirsk Russia
- Novosibirsk State University; Pirogova St. 2 630090 Novosibirsk Russia
| | - Valerii I. Bukhtiyarov
- Boreskov Institute of Catalysis SB RAS; 5 Acad. Lavrentiev Pr. 630090 Novosibirsk Russia
| | - Matthew S. Rosen
- MGH/A.A. Martinos Center for Biomedical Imaging; Boston MA 02129 USA
| | - Michael J. Barlow
- Respiratory Medicine Department, Queen's Medical Centre; University of Nottingham Medical School; Nottingham NG7 2UH UK
| | - Shahideh Safavi
- Respiratory Medicine Department, Queen's Medical Centre; University of Nottingham Medical School; Nottingham NG7 2UH UK
| | - Ian P. Hall
- Respiratory Medicine Department, Queen's Medical Centre; University of Nottingham Medical School; Nottingham NG7 2UH UK
| | - Leif Schröder
- Molecular Imaging, Department of Structural Biology; Leibniz-Institut für Molekulare Pharmakologie (FMP); 13125 Berlin Germany
| | - Eduard Y. Chekmenev
- Department of Radiology, Department of Biomedical Engineering; Department of Physics, Vanderbilt-Ingram Cancer Center (VICC); Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University; Nashville TN 37232 USA
- Russian Academy of Sciences; 119991 Moscow Russia
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Safavi S, Thorpe J, Haywood B, Barlow M, Hall IP. P43 Hyperpolarised xenon-129 MRI of lungs in healthy volunteers: a safety & feasibility study. Thorax 2016. [DOI: 10.1136/thoraxjnl-2016-209333.186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Brown J, Brazil S, McAsey D, Safavi S, Morgan C, Rokadiya S, Ruparel M, Mukherjee D, Doffman S, Lock S, Patel A, Reinhardt A, George J, Janes S, Navani N. 193 Patterns of disease recurrence and modality of detection following surgery for early stage lung cancer. Lung Cancer 2014. [DOI: 10.1016/s0169-5002(14)70193-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Hopkinson N, Wallis C, Higgins B, Gaduzo S, Sherrington R, Keilty S, Stern M, Britton J, Bush A, Moxham J, Sylvester K, Griffiths V, Sutherland T, Crossingham I, Raju R, Spencer C, Safavi S, Deegan P, Seymour J, Hickman K, Hughes J, Wieboldt J, Shaheen F, Peedell C, Mackenzie N, Nicholl D, Jolley C, Crooks G, Crooks G, Dow C, Deveson P, Bintcliffe O, Gray B, Kumar S, Haney S, Docherty M, Thomas A, Chua F, Dwarakanath A, Summers G, Prowse K, Lytton S, Ong YE, Graves J, Banerjee T, English P, Leonard A, Brunet M, Chaudhry N, Ketchell RI, Cummings N, Lebus J, Sharp C, Meadows C, Harle A, Stewart T, Parry D, Templeton-Wright S, Moore-Gillon J, Stratford- Martin J, Saini S, Matusiewicz S, Merritt S, Dowson L, Satkunam K, Hodgson L, Suh ES, Durrington H, Browne E, Walters N, Steier J, Barry S, Griffiths M, Hart N, Nikolic M, Berry M, Thomas A, Miller J, McNicholl D, Marsden P, Warwick G, Barr L, Adeboyeku D, Mohd Noh MS, Griffiths P, Davies L, Quint J, Lyall R, Shribman J, Collins A, Goldman J, Bloch S, Gill A, Man W, Christopher A, Yasso R, Rajhan A, Shrikrishna D, Moore C, Absalom G, Booton R, Fowler RW, Mackinlay C, Sapey E, Lock S, Walker P, Jha A, Satia I, Bradley B, Mustfa N, Haqqee R, Thomas M, Patel A, Redington A, Pillai A, Keaney N, Fowler S, Lowe L, Brennan A, Morrison D, Murray C, Hankinson J, Dutta P, Maddocks M, Pengo M, Curtis K, Rafferty G, Hutchinson J, Whitfield R, Turner S, Breen R, Naveed SUN, Goode C, Esterbrook G, Ahmed L, Walker W, Ford D, Connett G, Davidson P, Elston W, Stanton A, Morgan D, Myerson J, Maxwell D, Harrris A, Parmar S, Houghton C, Winter R, Puthucheary Z, Thomson F, Sturney S, Harvey J, Haslam PL, Patel I, Jennings D, Range S, Mallia-Milanes B, Collett A, Tate P, Russell R, Feary J, O'Driscoll R, Eaden J, Round J, Sharkey E, Montgomery M, Vaughan S, Scheele K, Lithgow A, Partridge S, Chavasse R, Restrick L, Agrawal S, Abdallah S, Lacy-Colson A, Adams N, Mitchell S, Haja Mydin H, Ward A, Denniston S, Steel M, Ghosh D, Connellan S, Rigge L, Williams R, Grove A, Anwar S, Dobson L, Hosker H, Stableforth D, Greening N, Howell T, Casswell G, Davies S, Tunnicliffe G, Mitchelmore P, Phitidis E, Robinson L, Prowse K, Bafadhel M, Robinson G, Boland A, Lipman M, Bourke S, Kaul S, Cowie C, Forrest I, Starren E, Burke H, Furness J, Bhowmik A, Everett C, Seaton D, Holmes S, Doe S, Parker S, Graham A, Paterson I, Maqsood U, Ohri C, Iles P, Kemp S, Iftikhar A, Carlin C, Fletcher T, Emerson P, Beasley V, Ramsay M, Buttery R, Mungall S, Crooks S, Ridyard J, Ross D, Guadagno A, Holden E, Coutts I, Cullen K, O'Connor S, Barker J, Sloper K, Watson J, Smith P, Anderson P, Brown L, Nyman C, Milburn H, Clive A, Serlin M, Bolton C, Fuld J, Powell H, Dayer M, Woolhouse I, Georgiadi A, Leonard H, Dodd J, Campbell I, Ruiz G, Zurek A, Paton JY, Malin A, Wood F, Hynes G, Connell D, Spencer D, Brown S, Smith D, Cooper D, O'Kane C, Hicks A, Creagh-Brown B, Lordan J, Nickol A, Primhak R, Fleming L, Powrie D, Brown J, Zoumot Z, Elkin S, Szram J, Scaffardi A, Marshall R, Macdonald I, Lightbody D, Farmer R, Wheatley I, Radnan P, Lane I, Booth A, Tilbrook S, Capstick T, Hewitt L, McHugh M, Nelson C, Wilson P, Padmanaban V, White J, Davison J, O'Callaghan U, Hodson M, Edwards J, Campbell C, Ward S, Wooler E, Ringrose E, Bridges D, Long A, Parkes M, Clarke S, Allen B, Connelly C, Forster G, Hoadley J, Martin K, Barnham K, Khan K, Munday M, Edwards C, O'Hara D, Turner S, Pieri-Davies S, Ford K, Daniels T, Wright J, Towns R, Fern K, Butcher J, Burgin K, Winter B, Freeman D, Olive S, Gray L, Pye K, Roots D, Cox N, Davies CA, Wicker J, Hilton K, Lloyd J, MacBean V, Wood M, Kowal J, Downs J, Ryan H, Guyatt F, Nicoll D, Lyons E, Narasimhan D, Rodman A, Walmsley S, Newey A, Buxton M, Dewar M, Cooper A, Reilly J, Lloyd J, Macmillan AB, Roots D, Olley A, Voase N, Martin S, McCarvill I, Christensen A, Agate R, Heslop K, Timlett A, Hailes K, Davey C, Pawulska B, Lane A, Ioakim S, Hough A, Treharne J, Jones H, Winter-Burke A, Miller L, Connolly B, Bingham L, Fraser U, Bott J, Johnston C, Graham A, Curry D, Sumner H, Costello CA, Bartoszewicz C, Badman R, Williamson K, Taylor A, Purcell H, Barnett E, Molloy A, Crawfurd L, Collins N, Monaghan V, Mir M, Lord V, Stocks J, Edwards A, Greenhalgh T, Lenney W, McKee M, McAuley D, Majeed A, Cookson J, Baker E, Janes S, Wedzicha W, Lomas Dean D, Harrison B, Davison T, Calverley P, Wilson R, Stockley R, Ayres J, Gibson J, Simpson J, Burge S, Warner J, Lenney W, Thomson N, Davies P, Woodcock A, Woodhead M, Spiro S, Ormerod L, Bothamley G, Partridge M, Shields M, Montgomery H, Simonds A, Barnes P, Durham S, Malone S, Arabnia G, Olivier S, Gardiner K, Edwards S. Children must be protected from the tobacco industry's marketing tactics. BMJ 2013; 347:f7358. [PMID: 24324220 DOI: 10.1136/bmj.f7358] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Nicholas Hopkinson
- British Thoracic Society Chronic Obstructive Pulmonary Disease Specialist Advisory Group, National Heart and Lung Institute, Imperial College, London SW3 6NP, UK
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Safavi S, Forestier E, Golovleva I, Barbany G, Nord KH, Moorman AV, Harrison CJ, Johansson B, Paulsson K. Loss of chromosomes is the primary event in near-haploid and low-hypodiploid acute lymphoblastic leukemia. Leukemia 2012; 27:248-50. [PMID: 22889820 DOI: 10.1038/leu.2012.227] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Safavi S, Chua FJK, Reilly P, Russell GK. P246 Suspicion-prompted testing reveals missed opportunities for diagnosing new HIV cases among patients with community-acquired pneumonia. Thorax 2010. [DOI: 10.1136/thx.2010.151068.47] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Safavi S, Colaluca B, Sriskandarajah K. Miliary tuberculosis in a young Caucasian adult. Case Reports 2010; 2010:2010/oct27_1/bcr0420102895. [DOI: 10.1136/bcr.04.2010.2895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Abstract
We describe an elderly patient presenting with cardio-embolic stroke who was found to have infective endocarditis (IE) affecting the mitral valve. Penicillin-resistant Facklamia hominis was identified as the causative pathogen. Despite initiation of aggressive antibiotic treatment, the patient suffered a fatal myocardial infarction 2 days post-diagnosis of IE. Facklamia spp. have not been previously reported to be associated with IE. Here, we discuss the link between IE and cardio-embolic stroke along with a discussion of various causative pathogens.
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Alavi M, Safavi S. Bilateral stress fractures of femoral necks on bone scans. Hell J Nucl Med 2010; 13:76. [PMID: 20411181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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Hejazi S, Safavi S, Alinasab A. Toxicity effect of vincristine – treatment on mice testis tissue. Journal of Men's Health 2009. [DOI: 10.1016/j.jomh.2009.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Alavi M, Safavi S. The bone scan in disseminated BCGitis. Hell J Nucl Med 2008; 11:46-47. [PMID: 18392228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 12/20/2007] [Accepted: 02/07/2008] [Indexed: 05/26/2023]
Abstract
Despite the long history of worldwide use of bacillus Calmette-Guerin (BCG) vaccine, a wide spectrum of adverse reactions has been observed in a small proportion of immunized infants. The most severe complication is disseminated BCGitis, often fatal but extremely rare and considered to be a result of host immunodeficiency. At present, polymerase chain reaction test, CT scan, ultrasound, X-rays and bone marrow aspirations are the investigations used to diagnose this disease. We report a case report of a 6 months old female infant with disseminated BCGitis. This paper aims to highlight the advantages of using bone (99m)Tc-MDP imaging and it's findings in supporting the diagnosis of disseminated BCGitis.
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Affiliation(s)
- Mehrossadat Alavi
- Department of Nuclear Medicine, Namazee Hospital, Shiraz University of Medical Sciences, Shiraz, Iran.
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Ganote CE, Liu SY, Safavi S, Kaltenbach JP. Hypoxia, calcium, and contracture as mediators of myocardial enzyme release. Adv Myocardiol 1983; 4:327-31. [PMID: 6856963 DOI: 10.1007/978-1-4757-4441-5_29] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
During calcium-free perfusion, anoxic contracture of myocardial cells causes cells to separate at intercalated disks and leads to an energy-independent enzyme release in the absence of active transmembrane calcium fluxes. It is proposed that contracture mediates membrane damage and enzyme release in cells sensitized to the calcium paradox.
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Ganote CE, Sims M, Safavi S. Effects of dimethylsulfoxide (DMSO) on the oxygen paradox in perfused rat hearts. Am J Pathol 1982; 109:270-6. [PMID: 6817643 PMCID: PMC1916113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The effect of dimethylsulfoxide (DMSO) on the morphologic features of cells and cellular enzyme release was studied in Langendorf-perfused rat hearts at 37 C. Ten percent DMSO greatly reduced the magnitude of oxygen-induced creatine kinase release (O2-CK) after a 60-minute period of hypoxic perfusion. DMSO also protected cells from development of severe contracture with formation of contraction bands. A linear correlation was found between the magnitude of O2-CK release and the percentage of cells in hearts containing contraction bands. Hypertonic mannitol did not protect hearts from CK release due to the calcium paradox, although DMSO was effective in this regard. DMSO reduced contractile force of hearts and tensions caused by hypoxic contracture as measured by an intraventricular balloon. This study suggests that DMSO affords protection from O2-CK release by actions on cells other than its osmotic effects. DMSO may alter the response of injured cells to the effects of calcium ions.
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Ganote CE, Angelo J, Safavi S, Kaltenbach JP. Protection from irreversible hypoxic injury by potassium cardioplegia and hypothermia: effects on contracture, morphology and O2-enzyme release. J Mol Cell Cardiol 1982; 14:587-99. [PMID: 7154096 DOI: 10.1016/0022-2828(82)90145-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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