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Crowhurst TD, Butler JA, Bussell LA, Johnston SD, Yeung D, Hodge G, Snell GI, Yeo A, Holmes M, Holmes-Liew CL. Impulse Oscillometry Versus Spirometry to Detect Bronchiolitis Obliterans Syndrome in Bilateral Lung Transplant Recipients: A Prospective Diagnostic Study. Transplantation 2024; 108:1004-1014. [PMID: 38044496 DOI: 10.1097/tp.0000000000004868] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
BACKGROUND Chronic lung allograft dysfunction (CLAD), and especially bronchiolitis obliterans syndrome (BOS), remain dominant causes of morbidity and mortality after lung transplantation. Interest is growing in the forced oscillation technique, of which impulse oscillometry (IOS) is a form, as a tool to improve our understanding of these disorders. However, data remain limited and no longitudinal studies have been published, meaning there is no information regarding any capacity IOS may have for the early detection of CLAD. METHODS We conducted a prospective longitudinal study enrolling a consecutive sample of adult bilateral lung transplant recipients with healthy lung allografts or CLAD and performed ongoing paired IOS and spirometry tests on a clinically determined basis. We assessed for correlations between IOS and spirometry and examined any predictive value either modality may hold for the early detection of BOS. RESULTS We enrolled 91 patients and conducted testing for 43 mo, collecting 558 analyzable paired IOS and spirometry tests, with a median of 9 tests per subject (interquartile range, 5-12) and a median testing interval of 92 d (interquartile range, 62-161). Statistically significant moderate-to-strong correlations were demonstrated between all IOS parameters and spirometry, except resistance at 20 Hz, which is a proximal airway measure. No predictive value for the early detection of BOS was found for IOS or spirometry. CONCLUSIONS This study presents the first longitudinal data from IOS after lung transplantation and adds considerably to the growing literature, showing unequivocal correlations with spirometry but failing to demonstrate a predictive value for BOS.
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Affiliation(s)
- Thomas D Crowhurst
- Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, SA, Australia
- Department of Haematology, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Jessica A Butler
- Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Lauren A Bussell
- Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Sonya D Johnston
- Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - David Yeung
- Department of Haematology, Royal Adelaide Hospital, Adelaide, SA, Australia
- Lung Transplant Service, The Alfred, Melbourne, VIC, Australia
| | - Greg Hodge
- Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, SA, Australia
- Department of Haematology, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Greg I Snell
- School of Medicine, Monash University, Melbourne, VIC, Australia
- SA Lung Transplant Unit, Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Aeneas Yeo
- Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, SA, Australia
- Department of Haematology, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Mark Holmes
- Department of Haematology, Royal Adelaide Hospital, Adelaide, SA, Australia
- Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia
| | - Chien-Li Holmes-Liew
- Department of Haematology, Royal Adelaide Hospital, Adelaide, SA, Australia
- Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia
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Pinczel AJ, Woods CM, Catcheside PG, Woodman RJ, Carney AS, Chai-Coetzer CL, Chia M, Cistulli PA, Hodge JC, Jones A, Lam ME, Lewis R, McArdle N, Ooi EH, Rea SC, Rees G, Singh B, Stow N, Yeo A, Antic N, McEvoy RD, Weaver EM, MacKay SG. Sleep apnea multi-level surgery trial: long-term observational outcomes. Sleep 2024; 47:zsad218. [PMID: 37607039 DOI: 10.1093/sleep/zsad218] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 08/02/2023] [Indexed: 08/24/2023] Open
Abstract
STUDY OBJECTIVES The sleep apnea multi-level surgery (SAMS) randomized clinical trial showed surgery improved outcomes at 6 months compared to ongoing medical management in patients with moderate or severe obstructive sleep apnea (OSA) who failed continuous positive airway pressure therapy. This study reports the long-term outcomes of the multi-level surgery as a case series. METHODS Surgical participants were reassessed >2 years postoperatively with the same outcomes reported in the main SAMS trial. Primary outcomes were apnea-hypopnea index (AHI) and Epworth sleepiness scale (ESS), with secondary outcomes including other polysomnography measures, symptoms, quality of life, and adverse events. Long-term effectiveness (baseline to long-term follow-up [LTFU]) and interval changes (6 month to LTFU) were assessed using mixed effects regression models. Control participants were also reassessed for rate of subsequent surgery and outcomes. RESULTS 36/48 (75%) of surgical participants were reevaluated (mean (standard deviation)) 3.5 (1.0) years following surgery, with 29 undergoing polysomnography. AHI was 41/h (23) at preoperative baseline and 21/h (18) at follow-up, representing persistent improvement of -24/h (95% CI -32, -17; p < 0.001). ESS was 12.3 (3.5) at baseline and 5.5 (3.9) at follow-up, representing persistent improvement of -6.8 (95% CI -8.3, -5.4; p < 0.001). Secondary outcomes were improved long term, and adverse events were minor. Interval change analysis suggests stability of outcomes. 36/43 (84%) of the control participants were reevaluated, with 25 (69%) reporting subsequent surgery, with symptom and quality of life improvements. CONCLUSION Multi-level upper airway surgery improves OSA burden with long-term maintenance of treatment effect in adults with moderate or severe OSA in whom conventional therapy failed. CLINICAL TRIAL Multi-level airway surgery in patients with moderate-severe obstructive sleep apnea (OSA) who have failed medical management to assess change in OSA events and daytime sleepiness; https://www.anzctr.org.au/Trial/Registration/TrialReview.aspx?id=366019&isReview=true; ACTRN12614000338662.
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Affiliation(s)
- Alison J Pinczel
- Adelaide Institute for Sleep Health, FHMRI Sleep Health, Flinders University, Adelaide, SA, Australia
| | - Charmaine M Woods
- Flinders Health and Medical Research Institute, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
- Department of Otolaryngology, Head and Neck Surgery, Flinders Medical Centre, Adelaide, SA, Australia
| | - Peter G Catcheside
- Adelaide Institute for Sleep Health, FHMRI Sleep Health, Flinders University, Adelaide, SA, Australia
| | - Richard J Woodman
- Flinders Health and Medical Research Institute, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Andrew Simon Carney
- Adelaide Institute for Sleep Health, FHMRI Sleep Health, Flinders University, Adelaide, SA, Australia
- Flinders Health and Medical Research Institute, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
- Southern ENT and Adelaide Sinus Centre, Flinders Private Hospital, Adelaide, SA, Australia
| | - Ching Li Chai-Coetzer
- Adelaide Institute for Sleep Health, FHMRI Sleep Health, Flinders University, Adelaide, SA, Australia
- Respiratory and Sleep Service, Southern Adelaide Local Health Network, Adelaide, SA, Australia
| | - Michael Chia
- Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Peter A Cistulli
- Charles Perkins Centre, Faculty for Medicine and Health, University of Sydney, Sydney, NSW, Australia
- Department of Respiratory and Sleep Medicine, Royal North Shore Hospital, Sydney, NSW, Australia
| | - John-Charles Hodge
- Ear Nose and Throat Department, Royal Adelaide Hospital, Adelaide, SA, Australia
- ICON Cancer Centre, Adelaide, SA, Australia
- Department of Surgery, University of Adelaide, Adelaide, SA, Australia
| | - Andrew Jones
- Illawarra Shoalhaven Local Health District, Wollongong, NSW, Australia
- Illawarra Sleep Medicine Centre, Wollongong, NSW, Australia
- Graduate School of Medicine, University of Wollongong, Wollongong, NSW, Australia
| | - Matthew E Lam
- Illawarra ENT Head and Neck Clinic, Wollongong, NSW, Australia
| | - Richard Lewis
- Head and Neck Surgery, Hollywood Medical Centre, Perth, WA, Australia
- Department of Otolaryngology, Royal Perth Hospital, Perth, WA, Australia
| | - Nigel McArdle
- West Australian Sleep Disorders Research Institute, Queen Elizabeth II Medical Centre, Perth, WA, Australia
- Department of Pulmonary Physiology and Sleep Medicine, Sir Charles Gairdner Hospital, Perth, WA, Australia
| | - Eng H Ooi
- Flinders Health and Medical Research Institute, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
- Department of Otolaryngology, Head and Neck Surgery, Flinders Medical Centre, Adelaide, SA, Australia
- Adelaide ENT Surgery, Flinders Private Hospital, Adelaide, SA, Australia
| | - Siobhan Clare Rea
- West Australian Sleep Disorders Research Institute, Queen Elizabeth II Medical Centre, Perth, WA, Australia
| | - Guy Rees
- ENT Surgeons, Memorial Hospital, North Adelaide, SA, Australia
- Department of Surgery, University of Adelaide, Adelaide, SA, Australia
| | - Bhajan Singh
- West Australian Sleep Disorders Research Institute, Queen Elizabeth II Medical Centre, Perth, WA, Australia
- Department of Pulmonary Physiology and Sleep Medicine, Sir Charles Gairdner Hospital, Perth, WA, Australia
- Faculty of Human Sciences, University of Western Australia, Perth, WA, Australia
| | - Nicholas Stow
- Sydney Centre for Ear, Nose and Throat, Sydney, NSW, Australia
- Sleep Clinic, The Woolcock Clinic, Glebe, NSW, Australia
| | - Aeneas Yeo
- Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Nick Antic
- Adelaide Institute for Sleep Health, FHMRI Sleep Health, Flinders University, Adelaide, SA, Australia
| | - Ronald Doug McEvoy
- Adelaide Institute for Sleep Health, FHMRI Sleep Health, Flinders University, Adelaide, SA, Australia
- Flinders Health and Medical Research Institute, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Edward M Weaver
- Department of Otolaryngology/Head and Neck Surgery, University of Washington, Seattle, WA, USA
- Surgery Service, Seattle Veterans Affairs Medical Center, Seattle, WA, USA
| | - Stuart G MacKay
- Illawarra Shoalhaven Local Health District, Wollongong, NSW, Australia
- Graduate School of Medicine, University of Wollongong, Wollongong, NSW, Australia
- Illawarra ENT Head and Neck Clinic, Wollongong, NSW, Australia
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Hardcastle N, Gaudreault M, Yeo A, Ungureanu E, Barnes R, Markham C, Chander S, Chu J. MO-0471 Motion management in liver SBRT and its impact on treatment time. Radiother Oncol 2022. [DOI: 10.1016/s0167-8140(22)02365-9] [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: 10/18/2022]
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Ong M, Pek K, Tan CN, Chew J, Lim JP, Yew S, Yeo A, Lim WS. Social Frailty and Executive Function: Association with Geriatric Syndromes, Life Space and Quality of Life in Healthy Community-Dwelling Older Adults. J Frailty Aging 2022; 11:206-213. [PMID: 35441199 PMCID: PMC8542364 DOI: 10.14283/jfa.2021.43] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND Despite emerging evidence about the association between social frailty and cognitive impairment, little is known about the role of executive function in this interplay, and whether the co-existence of social frailty and cognitive impairment predisposes to adverse health outcomes in healthy community-dwelling older adults. OBJECTIVES We aim to examine independent associations between social frailty with the MMSE and FAB, and to determine if having both social frailty and cognitive impairment is associated with worse health outcomes than either or neither condition. METHODS We studied 229 cognitively intact and functionally independent community-dwelling older adults (mean age= 67.2±7.43). Outcome measures comprise physical activity; physical performance and frailty; geriatric syndromes; life space and quality of life. We compared Chinese Mini Mental State Examination (CMMSE) and Chinese Frontal Assessment Battery (FAB) scores across the socially non-frail, socially pre-frail and socially frail. Participants were further recategorized into three subgroups (neither, either or both) based on presence of social frailty and cognitive impairment. Cognitive impairment was defined as a score below the educational adjusted cut-offs in either CMMSE or FAB. We performed logistic regression adjusted for significant covariates and mood to examine association with outcomes across the three subgroups. RESULTS Compared with CMMSE, Chinese FAB scores significantly decreased across the social frailty spectrum (p<0.001), suggesting strong association between executive function with social frailty. We derived three subgroups relative to relationship with socially frailty and executive dysfunction: (i) Neither, N=140(61.1%), (ii) Either, N=79(34.5%), and (iii) Both, N=10(4.4%). Compared with neither or either subgroups, having both social frailty and executive dysfunction was associated with anorexia (OR=4.79, 95% CI= 1.04-22.02), near falls and falls (OR= 5.23, 95% CI= 1.10-24.90), lower life-space mobility (odds ratio, OR=9.80, 95% CI=2.07-46.31) and poorer quality of life (OR= 13.2, 95% CI= 2.38-73.4). CONCLUSION Our results explicated the association of executive dysfunction with social frailty, and their synergistic relationship independent of mood with geriatric syndromes, decreased life space and poorer quality of life. In light of the current COVID-19 pandemic, the association between social frailty and executive dysfunction merits further study as a possible target for early intervention in relatively healthy older adults.
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Affiliation(s)
- M Ong
- Ms. Melissa Ong, TTSH Annex 2, Level 3, 11 Jalan Tan Tock Seng, Institute of Geriatrics and Active Ageing, Tan Tock Seng Hospital, Singapore 308433, Telephone: +65 6359 6327,
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5
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Stranks L, Barry S, Yeo A. A curious case of asphyxiating thoracic dystrophy in an adult. Respirol Case Rep 2021; 9:e0876. [PMID: 34795902 PMCID: PMC8580865 DOI: 10.1002/rcr2.876] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/21/2021] [Accepted: 10/26/2021] [Indexed: 11/11/2022] Open
Abstract
Asphyxiating thoracic dystrophy (ATD), also known as Jeune syndrome, is a rare autosomal recessive chondrodysplasia that most commonly manifests as shortening of long bones and ribs, as well as frequent extra-skeletal organ involvement. It is typically diagnosed in infancy or early childhood following episodes of respiratory distress or failure, in conjunction with characteristic physical findings, and is often fatal. The genetic heterogeneity of this disease, however, means there is varying severity of symptoms and physical manifestations. In this report, we describe a 57-year-old man with his first presentation of respiratory failure, with a history and physical findings consistent with ATD, a diagnosis previously unknown to the patient.
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Affiliation(s)
- Lachlan Stranks
- Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth AustraliaAustralia
- Faculty of Health and Medical SciencesThe University of AdelaideAdelaideSouth AustraliaAustralia
| | - Simone Barry
- Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth AustraliaAustralia
| | - Aeneas Yeo
- Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth AustraliaAustralia
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Sutherland K, Lowth AB, Antic N, Carney AS, Catcheside PG, Chai-Coetzer CL, Chia M, Hodge JC, Jones A, Kaambwa B, Lewis R, MacKay S, McEvoy RD, Ooi EH, Pinczel AJ, McArdle N, Rees G, Singh B, Stow N, Weaver EM, Woodman RJ, Woods CM, Yeo A, Cistulli PA. Volumetric MRI analysis of Multilevel Upper Airway Surgery effects on pharyngeal structure. Sleep 2021; 44:6324605. [PMID: 34283220 DOI: 10.1093/sleep/zsab183] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 03/22/2021] [Revised: 07/14/2021] [Indexed: 11/12/2022] Open
Abstract
STUDY OBJECTIVES The Sleep Apnea Multilevel Surgery (SAMS) trial found that modified uvulopalatopharyngoplasty with tonsillectomy (if tonsils present) combined with radiofrequency tongue ablation reduced obstructive sleep apnea (OSA) severity and daytime sleepiness in moderate-severe OSA. This study aimed to investigate mechanisms of effect on Apnoea-Hypopnoea Index (AHI) reduction by assessing changes in upper airway volumes (airway space, soft palate, tongue, and intra-tongue fat). METHODS This is a case series analysis of forty-three participants of 51 randomized to the surgical arm of SAMS trial who underwent repeat magnetic resonance imaging (MRI). Upper airway volume, length, and cross-sectional area, soft palate and tongue volumes and tongue fat were measured. Relationships between changes in anatomical structures and apnea-hypopnea index (AHI) were assessed. RESULTS The participant sample was predominantly male (79%); mean ± SD age 42.7 ± 13.3 years, body mass index 30.8 ± 4.1 kg.m 2, and AHI 47.0 ± 22.3 events/hour. There were no, or minor, overall volumetric changes in the airway, soft palate, total tongue, or tongue fat volume. Post-surgery there was an increase in the minimum cross-sectional area by 0.1 cm 2 (95% confidence interval 0.04-0.2cm 2) in the pharyngeal airway, but not statistically significant on corrected analysis. There was no association with anatomical changes and AHI improvement. CONCLUSIONS This contemporary multi-level upper airway surgery has been shown to be an effective OSA treatment. The current anatomical investigation suggests there are not significant post-operative volumetric changes associated with OSA improvement six-months post-surgery. This suggests that effect on OSA improvement is achieved without notable deformation of airway volume. Reduced need for neuromuscular compensation during wake following anatomical improvement via surgery could explain lack of measurable volume change. Further research to understand the mechanisms of action of multilevel surgery is required.
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Affiliation(s)
- Kate Sutherland
- Sleep Research Group, Charles Perkins Centre and Sydney Medical School, University of Sydney, NSW, Australia.,Department Respiratory & Sleep Medicine, Royal North Shore Hospital, Sydney, NSW, Australia
| | - Aimee B Lowth
- Sleep Research Group, Charles Perkins Centre and Sydney Medical School, University of Sydney, NSW, Australia.,Department Respiratory & Sleep Medicine, Royal North Shore Hospital, Sydney, NSW, Australia
| | - Nick Antic
- Adelaide Institute for Sleep Health, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia.,Respiratory and Sleep Service, Southern Adelaide Local Health Network, Adelaide, SA, Australia
| | - A Simon Carney
- Southern ENT & Adelaide Sinus Centre, Flinders Private Hospital, Adelaide, SA, Australia.,College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Peter G Catcheside
- Adelaide Institute for Sleep Health, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Ching Li Chai-Coetzer
- Adelaide Institute for Sleep Health, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia.,Respiratory and Sleep Service, Southern Adelaide Local Health Network, Adelaide, SA, Australia
| | - Michael Chia
- Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - J C Hodge
- Ear Nose and Throat Department, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Andrew Jones
- Illawarra Shoalhaven Local Health District, Wollongong, NSW, Australia.,Discipline of Medicine, University of Wollongong, NSW, Australia.,Illawarra ENT Head and Neck Clinic, Wollongong, NSW, Australia
| | - Billingsley Kaambwa
- Illawarra Sleep Medicine Centre, Wollongong, NSW, Australia.,Health Economics, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Richard Lewis
- Hollywood Medical Centre, Perth, WA, Australia.,Department of Otolaryngology, Head & Neck Surgery, Royal Perth Hospital, Perth, WA, Australia
| | - Stuart MacKay
- Illawarra Shoalhaven Local Health District, Wollongong, NSW, Australia.,Discipline of Medicine, University of Wollongong, NSW, Australia.,Department of Otolaryngology, Head and Neck Surgery, Flinders Medical Centre, Adelaide, SA, Australia
| | - R Doug McEvoy
- Adelaide Institute for Sleep Health, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia.,Respiratory and Sleep Service, Southern Adelaide Local Health Network, Adelaide, SA, Australia
| | - Eng H Ooi
- College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia.,Department of Otolaryngology, Head and Neck Surgery, Flinders Medical Centre, Adelaide, SA, Australia
| | - Alison J Pinczel
- Adelaide Institute for Sleep Health, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Nigel McArdle
- West Australian Sleep Disorders Research Institute, Queen Elizabeth II Medical Centre , Perth, WA, Australia.,Department of Pulmonary Physiology and Sleep Medicine, Sir Charles Gairdner Hospital, Perth, WA, Australia
| | - Guy Rees
- Department ENT Surgery, The Memorial Hospital, Adelaide, SA, Australia
| | - Bhajan Singh
- West Australian Sleep Disorders Research Institute, Queen Elizabeth II Medical Centre , Perth, WA, Australia.,Department of Pulmonary Physiology and Sleep Medicine, Sir Charles Gairdner Hospital, Perth, WA, Australia.,Faculty of Human Sciences, University of Western Australia, Perth, WA, Australia
| | - Nicholas Stow
- The Woolcock Clinic, University of Sydney, NSW, Australia
| | - Edward M Weaver
- Department of Otolaryngology/Head and Neck Surgery, University of Washington, Seattle, WA, USA.,Staff Surgeon, Seattle Veterans Affairs Medical Center, Seattle, WA, USA
| | - Richard J Woodman
- Flinders Centre for Epidemiology and Biostatistics, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Charmaine M Woods
- College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia.,Department of Otolaryngology, Head and Neck Surgery, Flinders Medical Centre, Adelaide, SA, Australia
| | - Aeneas Yeo
- Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Peter A Cistulli
- Sleep Research Group, Charles Perkins Centre and Sydney Medical School, University of Sydney, NSW, Australia.,Department Respiratory & Sleep Medicine, Royal North Shore Hospital, Sydney, NSW, Australia
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Lim JP, Yew S, Tay L, Chew J, Yeo A, Hafizah Ismail N, Ding YY, Lim WS. Grip Strength Criterion Matters: Impact of Average Versus Maximum Handgrip Strength on Sarcopenia Prevalence and Predictive Validity for Low Physical Performance. J Nutr Health Aging 2021; 24:1031-1035. [PMID: 33155633 DOI: 10.1007/s12603-020-1461-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
IMPORTANCE Muscle strength has been elevated to the forefront of sarcopenia diagnosis, with handgrip strength the preferred measure. Extant handgrip protocols adopt different handgrip strength (HGS) criteria. Paucity of direct comparison studies assessing the impact of HGS criterion on prevalence of sarcopenia and predictive validity on physical performance contributes to the lack of standardisation of HGS criteria in sarcopenia diagnosis. OBJECTIVES Our study aims to compare the effect of average (HGSave) versus maximum (HGSmax) HGS criterion on: (1) prevalence of low HGS and sarcopenia; and (2) association with physical performance at baseline and at 2 years. METHODS We recruited 200 community dwelling, cognitively intact, and functionally independent older adults. Muscle strength, physical performance measures, cognitive tests and nutritional assessments were performed. Short Physical Performance Battery (SPPB) was administered at baseline and at 2 years. We compared HGSave and HGSmax to assess the prevalence of low HGS and sarcopenia. Univariate analysis was performed comparing baseline characteristics between low and normal groups for each HGS criterion. Significantly different variables were included in logistic regression analysis to examine association of low HGS and SPPB at baseline. Predictive validity of low HGS for SPPB<10 at 2 years was examined by performing logistic regression analysis for HGSave and HGSmax. RESULTS The prevalence of low HGS and sarcopenia incorporating HGSave criterion is 40% and 33% respectively, whereas that of HGSmax criterion is 21% and 19.5% respectively. There is moderate agreement between the 2 HGS criteria for sarcopenia diagnosis (kappa=0.604) and poorer agreement for low HGS (kappa=0.570). There was no significant association with baseline SPPB for both HGS criteria. At 2 years, only low HGSmax was significantly associated with low SPPB (adjusted OR 3.91, 95% CI 1.24 - 12.33). CONCLUSION Our study demonstrates that HGS criteria matters in diagnosis of sarcopenia and we support extant HGS protocols using HGSmax criterion in view of better predictive validity for poor physical performance.
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Affiliation(s)
- J P Lim
- Jun Pei Lim, Department of Geriatric Medicine, Institute of Geriatrics and Active Aging, Tan Tock Seng Hospital, Annex 2 Level 3, 11 Jalan Tan Tock Seng, Singapore 308433, , Telephone: +65-6359 6474, Fax: +65-6359 6294
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8
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Pek K, Tan CN, Yew S, Yeo A, Lim JP, Chew J, Lim WS. Letter to the Editor: COVID-19 Pandemic Control Measures: Impact on Social Frailty and Health Outcomes in Non-Frail Community-Dwelling Older Adults. J Nutr Health Aging 2021; 25:816-818. [PMID: 34179939 PMCID: PMC8096157 DOI: 10.1007/s12603-021-1635-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 04/06/2021] [Indexed: 11/09/2022]
Affiliation(s)
- K Pek
- Kalene Pek, Tan Tock Seng Hospital, Singapore,
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Chew J, Lim JP, Yew S, Yeo A, Ismail NH, Ding YY, Lim WS. Disentangling the Relationship between Frailty and Intrinsic Capacity in Healthy Community-Dwelling Older Adults: A Cluster Analysis. J Nutr Health Aging 2021; 25:1112-1118. [PMID: 34725670 DOI: 10.1007/s12603-021-1679-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND Frailty and intrinsic capacity (IC) are distinct but interrelated constructs. Uncertainty remains regarding how they are related and interact to influence health outcomes. We aim to understand the relationship between frailty and IC by identifying subgroups based on frailty criteria and IC domains and studying one-year outcomes. METHODS We studied 200 independent community-dwelling older adults (mean age 67.9±7.9 years, Modified Barthel Index (MBI) score 99±2.6). Frailty was defined by modified Fried criteria. Scores (range: 0-2) were assigned to individual IC domains (cognition, psychological, locomotion, and vitality) to yield a total IC score of 8. To identify subgroups, two-step cluster analysis was performed with age, frailty and IC domains. Cluster associations with one-year outcomes (frailty, muscle strength (grip strength, repeated chair stand test), physical performance (gait speed, Short Physical Performance Battery), function (MBI) and quality-of-life (EuroQol (EQ)-5D)) were examined using multiple linear regression adjusted for age, gender and education. RESULTS Three distinct clusters were identified - Cluster 1: High IC/Robust (N=74, 37%); Cluster 2: Intermediate IC/Prefrail (N=73, 36.5%); and Cluster 3: Low IC/Prefrail-Frail (53, 26.5%). Comparing between clusters, IC domains, cognition, depressive symptoms, nutrition, strength and physical performance were least impaired in Cluster 1, intermediate in Cluster 2 and most impaired in Cluster 3. At one year, the proportion transitioning to frailty or remaining frail was highest in Cluster 3 compared to Cluster 2 and Cluster 1 (39% vs 6.9% vs 2.8%, P<0.001). Compared to Cluster 1, Cluster 3 experienced greatest declines in grip strength (β=-4.1, P<.001), MBI (β=-1.24, P=0.045) and EQ-5D utility scores (β=-0.053, P=0.005), with Cluster 2 intermediate between Cluster 1 and Cluster 3. CONCLUSIONS Amongst independent community-dwelling older adults, IC is complementary to frailty measures through better risk-profiling of one-year outcomes amongst prefrail individuals into intermediate and high-risk groups. The intermediate group merits follow-up to ascertain longer-term prognosis.
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Affiliation(s)
- J Chew
- Justin Chew, Tan Tock Seng Hospital, Singapore,
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Abstract
The recent coronavirus disease (COVID-19) was declared as a public health emergency by the World Health Organisation on 30th January 2020, and has now affected more than 100 countries. Healthcare institutions and governments worldwide have raced to contain the disease, albeit to varying degrees of success. Containment strategies adopted range from complete lockdowns to remaining open with public advisories regarding social distancing. However, general principles adopted by most countries remain the same, mainly to avoid gatherings in large numbers and limit social interactions to curb the spread of disease. In Singapore, this disease had a very different progression. The first wave of the disease started with the confirmation of the first COVID-19 positive patient in Singapore on 23rd January 2020. Initially, the daily number of confirmed cases were low and manageable. With a rise in unlinked cases, the Disease Outbreak Response System Condition (DORSCON) status was raised from yellow to orange. New cluster outbreaks in foreign worker dormitories led to the rampant spread of disease, with daily spikes of COVID-19 cases. As of 7th June 2020, we have a total of 37,910 confirmed cases of COVID-19 infections, the highest in Southeast Asia, 12,999 active cases and a manageable mortality count of 25 deaths. This details our unique method for dealing with a pandemic, including a brief demographic of trauma patients during this period. We were able to conserve sufficient resources to ensure that our essential services can still continue. Moving on, we have to ensure the continued protection of our population, especially the vulnerable groups such as the elderly and the immunocompromised, as we reopen.
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Affiliation(s)
- J Thor
- Department of Orthopaedic Surgery, Changi General Hospital, Singapore
| | - E Pagkaliwagan
- Department of Orthopaedic Surgery, Changi General Hospital, Singapore
| | - A Yeo
- Department of Orthopaedic Surgery, Changi General Hospital, Singapore
| | - J Loh
- Department of Orthopaedic Surgery, Changi General Hospital, Singapore
| | - C Kon
- Department of Orthopaedic Surgery, Changi General Hospital, Singapore
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11
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MacKay S, Carney AS, Catcheside PG, Chai-Coetzer CL, Chia M, Cistulli PA, Hodge JC, Jones A, Kaambwa B, Lewis R, Ooi EH, Pinczel AJ, McArdle N, Rees G, Singh B, Stow N, Weaver EM, Woodman RJ, Woods CM, Yeo A, McEvoy RD. Effect of Multilevel Upper Airway Surgery vs Medical Management on the Apnea-Hypopnea Index and Patient-Reported Daytime Sleepiness Among Patients With Moderate or Severe Obstructive Sleep Apnea: The SAMS Randomized Clinical Trial. JAMA 2020; 324:1168-1179. [PMID: 32886102 PMCID: PMC7489419 DOI: 10.1001/jama.2020.14265] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
IMPORTANCE Many adults with obstructive sleep apnea (OSA) use device treatments inadequately and remain untreated. OBJECTIVE To determine whether combined palatal and tongue surgery to enlarge or stabilize the upper airway is an effective treatment for patients with OSA when conventional device treatment failed. DESIGN, SETTING, AND PARTICIPANTS Multicenter, parallel-group, open-label randomized clinical trial of upper airway surgery vs ongoing medical management. Adults with symptomatic moderate or severe OSA in whom conventional treatments had failed were enrolled between November 2014 and October 2017, with follow-up until August 2018. INTERVENTIONS Multilevel surgery (modified uvulopalatopharyngoplasty and minimally invasive tongue volume reduction; n = 51) or ongoing medical management (eg, advice on sleep positioning, weight loss; n = 51). MAIN OUTCOMES AND MEASURES Primary outcome measures were the apnea-hypopnea index (AHI; ie, the number of apnea and hypopnea events/h; 15-30 indicates moderate and >30 indicates severe OSA) and the Epworth Sleepiness Scale (ESS; range, 0-24; >10 indicates pathological sleepiness). Baseline-adjusted differences between groups at 6 months were assessed. Minimal clinically important differences are 15 events per hour for AHI and 2 units for ESS. RESULTS Among 102 participants who were randomized (mean [SD] age, 44.6 [12.8] years; 18 [18%] women), 91 (89%) completed the trial. The mean AHI was 47.9 at baseline and 20.8 at 6 months for the surgery group and 45.3 at baseline and 34.5 at 6 months for the medical management group (mean baseline-adjusted between-group difference at 6 mo, -17.6 events/h [95% CI, -26.8 to -8.4]; P < .001). The mean ESS was 12.4 at baseline and 5.3 at 6 months in the surgery group and 11.1 at baseline and 10.5 at 6 months in the medical management group (mean baseline-adjusted between-group difference at 6 mo, -6.7 [95% CI, -8.2 to -5.2]; P < .001). Two participants (4%) in the surgery group had serious adverse events (1 had a myocardial infarction on postoperative day 5 and 1 was hospitalized for observation following hematemesis of old blood). CONCLUSIONS AND RELEVANCE In this preliminary study of adults with moderate or severe OSA in whom conventional therapy had failed, combined palatal and tongue surgery, compared with medical management, reduced the number of apnea and hypopnea events and patient-reported sleepiness at 6 months. Further research is needed to confirm these findings in additional populations and to understand clinical utility, long-term efficacy, and safety of multilevel upper airway surgery for treatment of patients with OSA. TRIAL REGISTRATION Australian New Zealand Clinical Trials Registry: ACTRN12614000338662.
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Affiliation(s)
- Stuart MacKay
- Illawarra Shoalhaven Local Health District, Wollongong, NSW, Australia
- University of Wollongong, NSW, Australia
- Illawarra ENT Head and Neck Clinic, Wollongong, NSW, Australia
| | - A. Simon Carney
- Southern ENT & Adelaide Sinus Centre, Flinders Private Hospital, Adelaide, SA, Australia
- College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Peter G. Catcheside
- Adelaide Institute for Sleep Health, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Ching Li Chai-Coetzer
- Adelaide Institute for Sleep Health, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
- Respiratory and Sleep Service, Southern Adelaide Local Health Network, Adelaide, SA, Australia
| | - Michael Chia
- Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Peter A. Cistulli
- Charles Perkins Centre, Faculty for Medicine and Health, University of Sydney, NSW, Australia
- Department of Respiratory and Sleep Medicine, Royal North Shore Hospital, Sydney, NSW, Australia
| | - John-Charles Hodge
- Ear Nose and Throat Department, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Andrew Jones
- Illawarra Shoalhaven Local Health District, Wollongong, NSW, Australia
- University of Wollongong, NSW, Australia
- Illawarra Sleep Medicine Centre, Wollongong, NSW, Australia
| | - Billingsley Kaambwa
- Health Economics Unit, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Richard Lewis
- Hollywood Medical Centre, Perth, WA, Australia
- Department of Otolaryngology, Head & Neck Surgery, Royal Perth Hospital, Perth, WA, Australia
| | - Eng H. Ooi
- College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
- Department of Otolaryngology, Head and Neck Surgery, Flinders Medical Centre, Adelaide, SA, Australia
| | - Alison J. Pinczel
- Adelaide Institute for Sleep Health, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Nigel McArdle
- West Australian Sleep Disorders Research Institute, Queen Elizabeth II Medical Centre, Perth, WA, Australia
- Department of Pulmonary Physiology and Sleep Medicine, Sir Charles Gairdner Hospital, Perth, WA, Australia
| | - Guy Rees
- The Memorial Hospital, Adelaide, SA, Australia
| | - Bhajan Singh
- West Australian Sleep Disorders Research Institute, Queen Elizabeth II Medical Centre, Perth, WA, Australia
- Department of Pulmonary Physiology and Sleep Medicine, Sir Charles Gairdner Hospital, Perth, WA, Australia
- Faculty of Human Sciences, University of Western Australia, Perth, WA, Australia
| | - Nicholas Stow
- The Woolcock Clinic, University of Sydney, NSW, Australia
| | - Edward M. Weaver
- Department of Otolaryngology/Head and Neck Surgery, University of Washington, Seattle
- Staff Surgeon, Seattle Veterans Affairs Medical Center, Seattle, Washington
| | - Richard J. Woodman
- Flinders Centre for Epidemiology and Biostatistics, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Charmaine M. Woods
- College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
- Department of Otolaryngology, Head and Neck Surgery, Flinders Medical Centre, Adelaide, SA, Australia
| | - Aeneas Yeo
- Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - R. Doug McEvoy
- Adelaide Institute for Sleep Health, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
- Respiratory and Sleep Service, Southern Adelaide Local Health Network, Adelaide, SA, Australia
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12
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N'Guessan Gnaman KC, Bouttier S, Yeo A, Aka Any-Grah AAS, Geiger S, Huang N, Nicolas V, Villebrun S, Faye-Kette H, Ponchel G, Koffi AA, Agnely F. Characterization and in vitro evaluation of a vaginal gel containing Lactobacillus crispatus for the prevention of gonorrhea. Int J Pharm 2020; 588:119733. [PMID: 32768529 DOI: 10.1016/j.ijpharm.2020.119733] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 04/29/2020] [Revised: 07/31/2020] [Accepted: 08/01/2020] [Indexed: 11/26/2022]
Abstract
The increasing resistance of Neisseria gonorrhoeae to any current antibiotic treatment and the difficulties associated with the use of prevention means such as condom urge the need for alternative methods to prevent this sexually transmitted infection. In this work, a prevention strategy based on the use of a vaginal gel containing Lactobacilli was assessed in vitro. A Lactobacillus crispatus strain (ATCC 33197) was selected based on the published data on its ability to inhibit Neisseria gonorrhoeae. Its probiotic properties were first characterized. Then, a thermo-sensitive hydrogel containing 21.5% of poloxamer 407, 1% of sodium alginate and 9log10 CFU of Lactobacillus crispatus per gel sample (5 g) was developed. The gelation temperature and the rheological characteristics of this formulation appeared suitable for a vaginal administration. Lactobacillus crispatus was viable in the gel for six months although a large amount of the bacteria was not culturable. The ability of Lactobacillus crispatus to inhibit Neisseria gonorrhoeae was still observed with the gel. Such system, thus, appeared promising for the prevention of gonorrhea.
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Affiliation(s)
- K C N'Guessan Gnaman
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92290 Châtenay-Malabry, France; Laboratoire de Pharmacie Galénique, Cosmétologie et Législation Pharmaceutique, UFR des Sciences Pharmaceutiques et Biologiques d'Abidjan, Université Félix Houphouet-Boigny, 01 BP V 34 Abidjan 01, Côte d'Ivoire
| | - S Bouttier
- INRAE, AgroParisTech, MIcalis Institute, Équipe Bactéries pathogènes et santé, Université Paris-Saclay, 92290 Châtenay-Malabry, France
| | - A Yeo
- Institut Pasteur, Departement de microbiologie, Unité des agents du tractus génital, Abidjan, Côte d'Ivoire
| | - A A S Aka Any-Grah
- Laboratoire de Pharmacie Galénique, Cosmétologie et Législation Pharmaceutique, UFR des Sciences Pharmaceutiques et Biologiques d'Abidjan, Université Félix Houphouet-Boigny, 01 BP V 34 Abidjan 01, Côte d'Ivoire
| | - S Geiger
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92290 Châtenay-Malabry, France
| | - N Huang
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92290 Châtenay-Malabry, France
| | - V Nicolas
- Université Paris-Saclay, SFR-UMS-IPSIT, Plateforme d'imagerie cellulaire MIPSIT, 92290 Châtenay-Malabry, France
| | - S Villebrun
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92290 Châtenay-Malabry, France
| | - H Faye-Kette
- Institut Pasteur, Departement de microbiologie, Unité des agents du tractus génital, Abidjan, Côte d'Ivoire
| | - G Ponchel
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92290 Châtenay-Malabry, France
| | - A A Koffi
- Laboratoire de Pharmacie Galénique, Cosmétologie et Législation Pharmaceutique, UFR des Sciences Pharmaceutiques et Biologiques d'Abidjan, Université Félix Houphouet-Boigny, 01 BP V 34 Abidjan 01, Côte d'Ivoire
| | - F Agnely
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92290 Châtenay-Malabry, France.
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13
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McLean KA, Ahmed WUR, Akhbari M, Claireaux HA, English C, Frost J, Henshall DE, Khan M, Kwek I, Nicola M, Rehman S, Varghese S, Drake TM, Bell S, Nepogodiev D, McLean KA, Drake TM, Glasbey JC, Borakati A, Drake TM, Kamarajah S, McLean KA, Bath MF, Claireaux HA, Gundogan B, Mohan M, Deekonda P, Kong C, Joyce H, Mcnamee L, Woin E, Burke J, Khatri C, Fitzgerald JE, Harrison EM, Bhangu A, Nepogodiev D, Arulkumaran N, Bell S, Duthie F, Hughes J, Pinkney TD, Prowle J, Richards T, Thomas M, Dynes K, Patel M, Patel P, Wigley C, Suresh R, Shaw A, Klimach S, Jull P, Evans D, Preece R, Ibrahim I, Manikavasagar V, Smith R, Brown FS, Deekonda P, Teo R, Sim DPY, Borakati A, Logan AE, Barai I, Amin H, Suresh S, Sethi R, Bolton W, Corbridge O, Horne L, Attalla M, Morley R, Robinson C, Hoskins T, McAllister R, Lee S, Dennis Y, Nixon G, Heywood E, Wilson H, Ng L, Samaraweera S, Mills A, Doherty C, Woin E, Belchos J, Phan V, Chouari T, Gardner T, Goergen N, Hayes JDB, MacLeod CS, McCormack R, McKinley A, McKinstry S, Milligan W, Ooi L, Rafiq NM, Sammut T, Sinclair E, Smith M, Baker C, Boulton APR, Collins J, Copley HC, Fearnhead N, Fox H, Mah T, McKenna J, Naruka V, Nigam N, Nourallah B, Perera S, Qureshi A, Saggar S, Sun L, Wang X, Yang DD, Caroll P, Doyle C, Elangovan S, Falamarzi A, Perai KG, Greenan E, Jain D, Lang-Orsini M, Lim S, O'Byrne L, Ridgway P, Van der Laan S, Wong J, Arthur J, Barclay J, Bradley P, Edwin C, Finch E, Hayashi E, Hopkins M, Kelly D, Kelly M, McCartan N, Ormrod A, Pakenham A, Hayward J, Hitchen C, Kishore A, Martins T, Philomen J, Rao R, Rickards C, Burns N, Copeland M, Durand C, Dyal A, Ghaffar A, Gidwani A, Grant M, Gribbon C, Gruhn A, Leer M, Ahmad K, Beattie G, Beatty M, Campbell G, Donaldson G, Graham S, Holmes D, Kanabar S, Liu H, McCann C, Stewart R, Vara S, Ajibola-Taylor O, Andah EJE, Ani C, Cabdi NMO, Ito G, Jones M, Komoriyama A, Patel P, Titu L, Basra M, Gallogly P, Harinath G, Leong SH, Pradhan A, Siddiqui I, Zaat S, Ali A, Galea M, Looi WL, Ng JCK, Atkin G, Azizi A, Cargill Z, China Z, Elliot J, Jebakumar R, Lam J, Mudalige G, Onyerindu C, Renju M, Babu VS, Hussain M, Joji N, Lovett B, Mownah H, Ali B, Cresswell B, Dhillon AK, Dupaguntla YS, Hungwe C, Lowe-Zinola JD, Tsang JCH, Bevan K, Cardus C, Duggal A, Hossain S, McHugh M, Scott M, Chan F, Evans R, Gurung E, Haughey B, Jacob-Ramsdale B, Kerr M, Lee J, McCann E, O'Boyle K, Reid N, Hayat F, Hodgson S, Johnston R, Jones W, Khan M, Linn T, Long S, Seetharam P, Shaman S, Smart B, Anilkumar A, Davies J, Griffith J, Hughes B, Islam Y, Kidanu D, Mushaini N, Qamar I, Robinson H, Schramm M, Tan CY, Apperley H, Billyard C, Blazeby JM, Cannon SP, Carse S, Göpfert A, Loizidou A, Parkin J, Sanders E, Sharma S, Slade G, Telfer R, Huppatz IW, Worley E, Chandramoorthy L, Friend C, Harris L, Jain P, Karim MJ, Killington K, McGillicuddy J, Rafferty C, Rahunathan N, Rayne T, Varathan Y, Verma N, Zanichelli D, Arneill M, Brown F, Campbell B, Crozier L, Henry J, McCusker C, Prabakaran P, Wilson R, Asif U, Connor M, Dindyal S, Math N, Pagarkar A, Saleem H, Seth I, Sharma S, Standfield N, Swartbol T, Adamson R, Choi JE, El Tokhy O, Ho W, Javaid NR, Kelly M, Mehdi AS, Menon D, Plumptre I, Sturrock S, Turner J, Warren O, Crane E, Ferris B, Gadsby C, Smallwood J, Vipond M, Wilson V, Amarnath T, Doshi A, Gregory C, Kandiah K, Powell B, Spoor H, Toh C, Vizor R, Common M, Dunleavy K, Harris S, Luo C, Mesbah Z, Kumar AP, Redmond A, Skulsky S, Walsh T, Daly D, Deery L, Epanomeritakis E, Harty M, Kane D, Khan K, Mackey R, McConville J, McGinnity K, Nixon G, Ang A, Kee JY, Leung E, Norman S, Palaniappan SV, Sarathy PP, Yeoh T, Frost J, Hazeldine P, Jones L, Karbowiak M, Macdonald C, Mutarambirwa A, Omotade A, Runkel M, Ryan G, Sawers N, Searle C, Suresh S, Vig S, Ahmad A, McGartland R, Sim R, Song A, Wayman J, Brown R, Chang LH, Concannon K, Crilly C, Arnold TJ, Burgin A, Cadden F, Choy CH, Coleman M, Lim D, Luk J, Mahankali-Rao P, Prudence-Taylor AJ, Ramakrishnan D, Russell J, Fawole A, Gohil J, Green B, Hussain A, McMenamin L, McMenamin L, Tang M, Azmi F, Benchetrit S, Cope T, Haque A, Harlinska A, Holdsworth R, Ivo T, Martin J, Nisar T, Patel A, Sasapu K, Trevett J, Vernet G, Aamir A, Bird C, Durham-Hall A, Gibson W, Hartley J, May N, Maynard V, Johnson S, Wood CM, O'Brien M, Orbell J, Stringfellow TD, Tenters F, Tresidder S, Cheung W, Grant A, Tod N, Bews-Hair M, Lim ZH, Lim SW, Vella-Baldacchino M, Auckburally S, Chopada A, Easdon S, Goodson R, McCurdie F, Narouz M, Radford A, Rea E, Taylor O, Yu T, Alfa-Wali M, Amani L, Auluck I, Bruce P, Emberton J, Kumar R, Lagzouli N, Mehta A, Murtaza A, Raja M, Dennahy IS, Frew K, Given A, He YY, Karim MA, MacDonald E, McDonald E, McVinnie D, Ng SK, Pettit A, Sim DPY, Berthaume-Hawkins SD, Charnley R, Fenton K, Jones D, Murphy C, Ng JQ, Reehal R, Robinson H, Seraj SS, Shang E, Tonks A, White P, Yeo A, Chong P, Gabriel R, Patel N, Richardson E, Symons L, Aubrey-Jones D, Dawood S, Dobrzynska M, Faulkner S, Griffiths H, Mahmood F, Patel P, Perry M, Power A, Simpson R, Ali A, Brobbey P, Burrows A, Elder P, Ganyani R, Horseman C, Hurst P, Mann H, Marimuthu K, McBride S, Pilsworth E, Powers N, Stanier P, Innes R, Kersey T, Kopczynska M, Langasco N, Patel N, Rajagopal R, Atkins B, Beasley W, Lim ZC, Gill A, Ang HL, Williams H, Yogeswara T, Carter R, Fam M, Fong J, Latter J, Long M, Mackinnon S, McKenzie C, Osmanska J, Raghuvir V, Shafi A, Tsang K, Walker L, Bountra K, Coldicutt O, Fletcher D, Hudson S, Iqbal S, Bernal TL, Martin JWB, Moss-Lawton F, Smallwood J, Vipond M, Cardwell A, Edgerton K, Laws J, Rai A, Robinson K, Waite K, Ward J, Youssef H, Knight C, Koo PY, Lazarou A, Stanger S, Thorn C, Triniman MC, Botha A, Boyles L, Cumming S, Deepak S, Ezzat A, Fowler AJ, Gwozdz AM, Hussain SF, Khan S, Li H, Morrell BL, Neville J, Nitiahpapand R, Pickering O, Sagoo H, Sharma E, Welsh K, Denley S, Khan S, Agarwal M, Al-Saadi N, Bhambra R, Gupta A, Jawad ZAR, Jiao LR, Khan K, Mahir G, Singagireson S, Thoms BL, Tseu B, Wei R, Yang N, Britton N, Leinhardt D, Mahfooz M, Palkhi A, Price M, Sheikh S, Barker M, Bowley D, Cant M, Datta U, Farooqi M, Lee A, Morley G, Amin MN, Parry A, Patel S, Strang S, Yoganayagam N, Adlan A, Chandramoorthy S, Choudhary Y, Das K, Feldman M, France B, Grace R, Puddy H, Soor P, Ali M, Dhillon P, Faraj A, Gerard L, Glover M, Imran H, Kim S, Patrick Y, Peto J, Prabhudesai A, Smith R, Tang A, Vadgama N, Dhaliwal R, Ecclestone T, Harris A, Ong D, Patel D, Philp C, Stewart E, Wang L, Wong E, Xu Y, Ashaye T, Fozard T, Galloway F, Kaptanis S, Mistry P, Nguyen T, Olagbaiye F, Osman M, Philip Z, Rembacken R, Tayeh S, Theodoropoulou K, Herman A, Lau J, Saha A, Trotter M, Adeleye O, Cave D, Gunwa T, Magalhães J, Makwana S, Mason R, Parish M, Regan H, Renwick P, Roberts G, Salekin D, Sivakumar C, Tariq A, Liew I, McDade A, Stewart D, Hague M, Hudson-Peacock N, Jackson CES, James F, Pitt J, Walker EY, Aftab R, Ang JJ, Anwar S, Battle J, Budd E, Chui J, Crook H, Davies P, Easby S, Hackney E, Ho B, Imam SZ, Rammell J, Andrews H, Perry C, Schinle P, Ahmed P, Aquilina T, Balai E, Church M, Cumber E, Curtis A, Davies G, Dennis Y, Dumann E, Greenhalgh S, Kim P, King S, Metcalfe KHM, Passby L, Redgrave N, Soonawalla Z, Waters S, Zornoza A, Gulzar I, Hole J, Hull K, Ishaq H, Karaj J, Kelkar A, Love E, Patel S, Thakrar D, Vine M, Waterman A, Dib NP, Francis N, Hanson M, Ingleton R, Sadanand KS, Sukirthan N, Arnell S, Ball M, Bassam N, Beghal G, Chang A, Dawe V, George A, Huq T, Hussain A, Ikram B, Kanapeckaite L, Khan M, Ramjas D, Rushd A, Sait S, Serry M, Yardimci E, Capella S, Chenciner L, Episkopos C, Karam E, McCarthy C, Moore-Kelly W, Watson N, Ahluwalia V, Barnfield J, Ben-Gal O, Bloom I, Gharatya A, Khodatars K, Merchant N, Moonan A, Moore M, Patel K, Spiers H, Sundaram K, Turner J, Bath MF, Black J, Chadwick H, Huisman L, Ingram H, Khan S, Martin L, Metcalfe M, Sangal P, Seehra J, Thatcher A, Venturini S, Whitcroft I, Afzal Z, Brown S, Gani A, Gomaa A, Hussein N, Oh SY, Pazhaniappan N, Sharkey E, Sivagnanasithiyar T, Williams C, Yeung J, Cruddas L, Gurjar S, Pau A, Prakash R, Randhawa R, Chen L, Eiben I, Naylor M, Osei-Bordom D, Trenear R, Bannard-Smith J, Griffiths N, Patel BY, Saeed F, Abdikadir H, Bennett M, Church R, Clements SE, Court J, Delvi A, Hubert J, Macdonald B, Mansour F, Patel RR, Perris R, Small S, Betts A, Brown N, Chong A, Croitoru C, Grey A, Hickland P, Ho C, Hollington D, McKie L, Nelson AR, Stewart H, Eiben P, Nedham M, Ali I, Brown T, Cumming S, Hunt C, Joyner C, McAlinden C, Roberts J, Rogers D, Thachettu A, Tyson N, Vaughan R, Verma N, Yasin T, Andrew K, Bhamra N, Leong S, Mistry R, Noble H, Rashed F, Walker NR, Watson L, Worsfold M, Yarham E, Abdikadir H, Arshad A, Barmayehvar B, Cato L, Chan-lam N, Do V, Leong A, Sheikh Z, Zheleniakova T, Coppel J, Hussain ST, Mahmood R, Nourzaie R, Prowle J, Sheik-Ali S, Thomas A, Alagappan A, Ashour R, Bains H, Diamond J, Gordon J, Ibrahim B, Khalil M, Mittapalli D, Neo YN, Patil P, Peck FS, Reza N, Swan I, Whyte M, Chaudhry S, Hernon J, Khawar H, O'Brien J, Pullinger M, Rothnie K, Ujjal S, Bhatte S, Curtis J, Green S, Mayer A, Watkinson G, Chapple K, Hawthorne T, Khaliq M, Majkowski L, Malik TAM, Mclauchlan K, En BNW, Parton S, Robinson SD, Saat MI, Shurovi BN, Varatharasasingam K, Ward AE, Behranwala K, Bertelli M, Cohen J, Duff F, Fafemi O, Gupta R, Manimaran M, Mayhew J, Peprah D, Wong MHY, Farmer N, Houghton C, Kandhari N, Khan K, Ladha D, Mayes J, McLennan F, Panahi P, Seehra H, Agrawal R, Ahmed I, Ali S, Birkinshaw F, Choudhry M, Gokani S, Harrogate S, Jamal S, Nawrozzadeh F, Swaray A, Szczap A, Warusavitarne J, Abdalla M, Asemota N, Cullum R, Hartley M, Maxwell-Armstrong C, Mulvenna C, Phillips J, Yule A, Ahmed L, Clement KD, Craig N, Elseedawy E, Gorman D, Kane L, Livie J, Livie V, Moss E, Naasan A, Ravi F, Shields P, Zhu Y, Archer M, Cobley H, Dennis R, Downes C, Guevel B, Lamptey E, Murray H, Radhakrishnan A, Saravanabavan S, Sardar M, Shaw C, Tilliridou V, Wright R, Ye W, Alturki N, Helliwell R, Jones E, Kelly D, Lambotharan S, Scott K, Sivakumar R, Victor L, Boraluwe-Rallage H, Froggatt P, Haynes S, Hung YMA, Keyte A, Matthews L, Evans E, Haray P, John I, Mathivanan A, Morgan L, Oji O, Okorocha C, Rutherford A, Spiers H, Stageman N, Tsui A, Whitham R, Amoah-Arko A, Cecil E, Dietrich A, Fitzpatrick H, Guy C, Hair J, Hilton J, Jawad L, McAleer E, Taylor Z, Yap J, Akhbari M, Debnath D, Dhir T, Elbuzidi M, Elsaddig M, Glace S, Khawaja H, Koshy R, Lal K, Lobo L, McDermott A, Meredith J, Qamar MA, Vaidya A, Acquaah F, Barfi L, Carter N, Gnanappiragasam D, Ji C, Kaminski F, Lawday S, Mackay K, Sulaiman SK, Webb R, Ananthavarathan P, Dalal F, Farrar E, Hashemi R, Hossain M, Jiang J, Kiandee M, Lex J, Mason L, Matthews JH, McGeorge E, Modhwadia S, Pinkney T, Radotra A, Rickard L, Rodman L, Sales A, Tan KL, Bachi A, Bajwa DS, Battle J, Brown LR, Butler A, Calciu A, Davies E, Gardner I, Girdlestone T, Ikogho O, Keelan G, O'Loughlin P, Tam J, Elias J, Ngaage M, Thompson J, Bristow S, Brock E, Davis H, Pantelidou M, Sathiyakeerthy A, Singh K, Chaudhry A, Dickson G, Glen P, Gregoriou K, Hamid H, Mclean A, Mehtaji P, Neophytou G, Potts S, Belgaid DR, Burke J, Durno J, Ghailan N, Hanson M, Henshaw V, Nazir UR, Omar I, Riley BJ, Roberts J, Smart G, Van Winsen K, Bhatti A, Chan M, D'Auria M, Green S, Keshvala C, Li H, Maxwell-Armstrong C, Michaelidou M, Simmonds L, Smith C, Wimalathasan A, Abbas J, Cairns C, Chin YR, Connelly A, Moug S, Nair A, Svolkinas D, Coe P, Subar D, Wang H, Zaver V, Brayley J, Cookson P, Cunningham L, Gaukroger A, Ho M, Hough A, King J, O'Hagan D, Widdison A, Brown R, Brown B, Chavan A, Francis S, Hare L, Lund J, Malone N, Mavi B, McIlwaine A, Rangarajan S, Abuhussein N, Campbell HS, Daniels J, Fitzgerald I, Mansfield S, Pendrill A, Robertson D, Smart YW, Teng T, Yates J, Belgaumkar A, Katira A, Kossoff J, Kukran S, Laing C, Mathew B, Mohamed T, Myers S, Novell R, Phillips BL, Thomas M, Turlejski T, Turner S, Varcada M, Warren L, Wynell-Mayow W, Church R, Linley-Adams L, Osborn G, Saunders M, Spencer R, Srikanthan M, Tailor S, Tullett A, Ali M, Al-Masri S, Carr G, Ebhogiaye O, Heng S, Manivannan S, Manley J, McMillan LE, Peat C, Phillips B, Thomas S, Whewell H, Williams G, Bienias A, Cope EA, Courquin GR, Day L, Garner C, Gimson A, Harris C, Markham K, Moore T, Nadin T, Phillips C, Subratty SM, Brown K, Dada J, Durbacz M, Filipescu T, Harrison E, Kennedy ED, Khoo E, Kremel D, Lyell I, Pronin S, Tummon R, Ventre C, Walls L, Wootton E, Akhtar A, Davies E, El-Sawy D, Farooq M, Gaddah M, Griffiths H, Katsaiti I, Khadem N, Leong K, Williams I, Chean CS, Chudek D, Desai H, Ellerby N, Hammad A, Malla S, Murphy B, Oshin O, Popova P, Rana S, Ward T, Abbott TEF, Akpenyi O, Edozie F, El Matary R, English W, Jeyabaladevan S, Morgan C, Naidu V, Nicholls K, Peroos S, Prowle J, Sansome S, Torrance HD, Townsend D, Brecher J, Fung H, Kazmi Z, Outlaw P, Pursnani K, Ramanujam N, Razaq A, Sattar M, Sukumar S, Tan TSE, Chohan K, Dhuna S, Haq T, Kirby S, Lacy-Colson J, Logan P, Malik Q, McCann J, Mughal Z, Sadiq S, Sharif I, Shingles C, Simon A, Burnage S, Chan SSN, Craig ARJ, Duffield J, Dutta A, Eastwood M, Iqbal F, Mahmood F, Mahmood W, Patel C, Qadeer A, Robinson A, Rotundo A, Schade A, Slade RD, De Freitas M, Kinnersley H, McDowell E, Moens-Lecumberri S, Ramsden J, Rockall T, Wiffen L, Wright S, Bruce C, Francois V, Hamdan K, Limb C, Lunt AJ, Manley L, Marks M, Phillips CFE, Agnew CJF, Barr CJ, Benons N, Hart SJ, Kandage D, Krysztopik R, Mahalingam P, Mock J, Rajendran S, Stoddart MT, Clements B, Gillespie H, Lee S, McDougall R, Murray C, O'Loane R, Periketi S, Tan S, Amoah R, Bhudia R, Dudley B, Gilbert A, Griffiths B, Khan H, McKigney N, Roberts B, Samuel R, Seelarbokus A, Stubbing-Moore A, Thompson G, Williams P, Ahmed N, Akhtar R, Chandler E, Chappelow I, Gil H, Gower T, Kale A, Lingam G, Rutler L, Sellahewa C, Sheikh A, Stringer H, Taylor R, Aglan H, Ashraf MR, Choo S, Das E, Epstein J, Gentry R, Mills D, Poolovadoo Y, Ward N, Bull K, Cole A, Hack J, Khawari S, Lake C, Mandishona T, Perry R, Sleight S, Sultan S, Thornton T, Williams S, Arif T, Castle A, Chauhan P, Chesner R, Eilon T, Kamarajah S, Kambasha C, Lock L, Loka T, Mohammad F, Motahariasl S, Roper L, Sadhra SS, Sheikh A, Toma T, Wadood Q, Yip J, Ainger E, Busti S, Cunliffe L, Flamini T, Gaffing S, Moorcroft C, Peter M, Simpson L, Stokes E, Stott G, Wilson J, York J, Yousaf A, Borakati A, Brown M, Goaman A, Hodgson B, Ijeomah A, Iroegbu U, Kaur G, Lowe C, Mahmood S, Sattar Z, Sen P, Szuman A, Abbas N, Al-Ausi M, Anto N, Bhome R, Eccles L, Elliott J, Hughes EJ, Jones A, Karunatilleke AS, Knight JS, Manson CCF, Mekhail I, Michaels L, Noton TM, Okenyi E, Reeves T, Yasin IH, Banfield DA, Harris R, Lim D, Mason-Apps C, Roe T, Sandhu J, Shafiq N, Stickler E, Tam JP, Williams LM, Ainsworth P, Boualbanat Y, Doull C, Egan E, Evans L, Hassanin K, Ninkovic-Hall G, Odunlami W, Shergill M, Traish M, Cummings D, Kershaw S, Ong J, Reid F, Toellner H, Alwandi A, Amer M, George D, Haynes K, Hughes K, Peakall L, Premakumar Y, Punjabi N, Ramwell A, Sawkins H, Ashwood J, Baker A, Baron C, Bhide I, Blake E, De Cates C, Esmail R, Hosamuddin H, Kapp J, Nguru N, Raja M, Thomson F, Ahmed H, Aishwarya G, Al-Huneidi R, Ali S, Aziz R, Burke D, Clarke B, Kausar A, Maskill D, Mecia L, Myers L, Smith ACD, Walker G, Wroe N, Donohoe C, Gibbons D, Jordan P, Keogh C, Kiely A, Lalor P, McCrohan M, Powell C, Foley MP, Reynolds J, Silke E, Thorpe O, Kong JTH, White C, Ali Q, Dalrymple J, Ge Y, Khan H, Luo RS, Paine H, Paraskeva B, Parker L, Pillai K, Salciccioli J, Selvadurai S, Sonagara V, Springford LR, Tan L, Appleton S, Leadholm N, Zhang Y, Ahern D, Cotter M, Cremen S, Durrigan T, Flack V, Hrvacic N, Jones H, Jong B, Keane K, O'Connell PR, O'sullivan J, Pek G, Shirazi S, Barker C, Brown A, Carr W, Chen Y, Guillotte C, Harte J, Kokayi A, Lau K, McFarlane S, Morrison S, Broad J, Kenefick N, Makanji D, Printz V, Saito R, Thomas O, Breen H, Kirk S, Kong CH, O'Kane A, Eddama M, Engledow A, Freeman SK, Frost A, Goh C, Lee G, Poonawala R, Suri A, Taribagil P, Brown H, Christie S, Dean S, Gravell R, Haywood E, Holt F, Pilsworth E, Rabiu R, Roscoe HW, Shergill S, Sriram A, Sureshkumar A, Tan LC, Tanna A, Vakharia A, Bhullar S, Brannick S, Dunne E, Frere M, Kerin M, Kumar KM, Pratumsuwan T, Quek R, Salman M, Van Den Berg N, Wong C, Ahluwalia J, Bagga R, Borg CM, Calabria C, Draper A, Farwana M, Joyce H, Khan A, Mazza M, Pankin G, Sait MS, Sandhu N, Virani N, Wong J, Woodhams K, Croghan N, Ghag S, Hogg G, Ismail O, John N, Nadeem K, Naqi M, Noe SM, Sharma A, Tan S, Begum F, Best R, Collishaw A, Glasbey J, Golding D, Gwilym B, Harrison P, Jackman T, Lewis N, Luk YL, Porter T, Potluri S, Stechman M, Tate S, Thomas D, Walford B, Auld F, Bleakley A, Johnston S, Jones C, Khaw J, Milne S, O'Neill S, Singh KKR, Smith R, Swan A, Thorley N, Yalamarthi S, Yin ZD, Ali A, Balian V, Bana R, Clark K, Livesey C, McLachlan G, Mohammad M, Pranesh N, Richards C, Ross F, Sajid M, Brooke M, Francombe J, Gresly J, Hutchinson S, Kerrigan K, Matthews E, Nur S, Parsons L, Sandhu A, Vyas M, White F, Zulkifli A, Zuzarte L, Al-Mousawi A, Arya J, Azam S, Yahaya AA, Gill K, Hallan R, Hathaway C, Leptidis I, McDonagh L, Mitrasinovic S, Mushtaq N, Pang N, Peiris GB, Rinkoff S, Chan L, Christopher E, Farhan-Alanie MMH, Gonzalez-Ciscar A, Graham CJ, Lim H, McLean KA, Paterson HM, Rogers A, Roy C, Rutherford D, Smith F, Zubikarai G, Al-Khudairi R, Bamford M, Chang M, Cheng J, Hedley C, Joseph R, Mitchell B, Perera S, Rothwell L, Siddiqui A, Smith J, Taylor K, Wright OW, Baryan HK, Boyd G, Conchie H, Cox L, Davies J, Gardner S, Hill N, Krishna K, Lakin F, Scotcher S, Alberts J, Asad M, Barraclough J, Campbell A, Marshall D, Wakeford W, Cronbach P, D'Souza F, Gammeri E, Houlton J, Hall M, Kethees A, Patel R, Perera M, Prowle J, Shaid M, Webb E, Beattie S, Chadwick M, El-Taji O, Haddad S, Mann M, Patel M, Popat K, Rimmer L, Riyat H, Smith H, Anandarajah C, Cipparrone M, Desai K, Gao C, Goh ET, Howlader M, Jeffreys N, Karmarkar A, Mathew G, Mukhtar H, Ozcan E, Renukanthan A, Sarens N, Sinha C, Woolley A, Bogle R, Komolafe O, Loo F, Waugh D, Zeng R, Crewe A, Mathias J, Mills A, Owen A, Prior A, Saunders I, Baker A, Crilly L, McKeon J, Ubhi HK, Adeogun A, Carr R, Davison C, Devalia S, Hayat A, Karsan RB, Osborne C, Scott K, Weegenaar C, Wijeyaratne M, Babatunde F, Barnor-Ahiaku E, Beattie G, Chitsabesan P, Dixon O, Hall N, Ilenkovan N, Mackrell T, Nithianandasivam N, Orr J, Palazzo F, Saad M, Sandland-Taylor L, Sherlock J, Ashdown T, Chandler S, Garsaa T, Lloyd J, Loh SY, Ng S, Perkins C, Powell-Chandler A, Smith F, Underhill R. Perioperative intravenous contrast administration and the incidence of acute kidney injury after major gastrointestinal surgery: prospective, multicentre cohort study. Br J Surg 2020; 107:1023-1032. [PMID: 32026470 DOI: 10.1002/bjs.11453] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 09/21/2019] [Accepted: 11/08/2019] [Indexed: 01/14/2023]
Abstract
BACKGROUND This study aimed to determine the impact of preoperative exposure to intravenous contrast for CT and the risk of developing postoperative acute kidney injury (AKI) in patients undergoing major gastrointestinal surgery. METHODS This prospective, multicentre cohort study included adults undergoing gastrointestinal resection, stoma reversal or liver resection. Both elective and emergency procedures were included. Preoperative exposure to intravenous contrast was defined as exposure to contrast administered for the purposes of CT up to 7 days before surgery. The primary endpoint was the rate of AKI within 7 days. Propensity score-matched models were adjusted for patient, disease and operative variables. In a sensitivity analysis, a propensity score-matched model explored the association between preoperative exposure to contrast and AKI in the first 48 h after surgery. RESULTS A total of 5378 patients were included across 173 centres. Overall, 1249 patients (23·2 per cent) received intravenous contrast. The overall rate of AKI within 7 days of surgery was 13·4 per cent (718 of 5378). In the propensity score-matched model, preoperative exposure to contrast was not associated with AKI within 7 days (odds ratio (OR) 0·95, 95 per cent c.i. 0·73 to 1·21; P = 0·669). The sensitivity analysis showed no association between preoperative contrast administration and AKI within 48 h after operation (OR 1·09, 0·84 to 1·41; P = 0·498). CONCLUSION There was no association between preoperative intravenous contrast administered for CT up to 7 days before surgery and postoperative AKI. Risk of contrast-induced nephropathy should not be used as a reason to avoid contrast-enhanced CT.
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Crowhurst TD, Tcherveniakov P, Lorraine B, Polasek JF, Nguyen PT, Yeo A. Obstructive sleep apnoea is associated with dynamic intra-thoracic central airway collapse: results of a 10-year multi-centre retrospective analysis. Sleep Science Practice 2020. [DOI: 10.1186/s41606-020-00045-z] [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: 11/10/2022] Open
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Rainey H, Baraf HSB, Yeo A, Lipsky P. THU0410 COMPANION IMMUNOSUPPRESSION WITH AZATHIOPRINE INCREASES THE FREQUENCY OF PERSISTENT RESPONSIVENESS TO PEGLOTICASE IN PATIENTS WITH CHRONIC REFRACTORY GOUT. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.4642] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:Pegloticase is a mammalian recombinant uricase coupled to monomethoxy polyethylene glycol that is approved in the US for treatment of patients with chronic refractory gout and causes profound reductions in serum urate. However, treatment with pegloticase is limited by the induction of anti-drug antibodies and loss of responsiveness in nearly half of treated patients.Objectives:The goal of this study was to determine whether co-therapy with azathioprine (AZA) would increase the frequency of chronic refractory gout patients who had persistent urate lowering from pegloticase therapy.Methods:This open label multicenter study enrolled subjects with chronic gout who failed to lower serum urate to <6 mg/dL despite medically indicated doses of urate lowering therapy (NCT02598596). Patients were screened for adequate levels of the AZA metabolizing enzyme thiopurine methyl transferase and then started on daily oral AZA 1.25 mg/kg for 1 week and then 2.5 mg/kg for the remainder of the trial. Blood levels of AZA metabolites 6-thioguanine and 6-methylmercaptopurine were measured biweekly. After receiving 2 weeks of AZA, patients were started on pegloticase (8 mg IV) and were treated biweekly for 24 weeks. The primary endpoint was the persistent lowering of serum urate to <6 mg/dL at the last three consecutive study visits. Patients who had an increase in serum urate to >6 mg/dL while on therapy did not receive additional pegloticase. All patients received infusion prophylaxis with hydrocortisone as well as gout flare prophylaxis.Results:To date, 12 patients have been enrolled. All patients were male, 75% white and 25% African American. Mean age was 62.4 ± 14.7 years, the mean BMI was 31.1 ± 4.5 and the mean duration of gout was 13.8 ± 9.2 years. At baseline, all patients had visible tophi; 58.3% suffered from gout flares; 81.8% had hypertension; 45.5% had dyslipidemia and 9.0% had coronary artery disease. Of the 12 patients, 6 have completed the full course of treatment with persistent urate lowering and 2 remain on treatment also with persistent urate lowering (figure). 2 patients lost the urate lowering effect, both after 2 doses of pegloticase, and did not receive additional therapy. 1 patient experienced an infusion reaction during the first dose (1 infusion reaction in 90 infusions [1.1%] in the entire trial to date) and 1 subject had subjective symptoms of AZA intolerance with no laboratory abnormalities; these subjects discontinued the study and were not evaluable for the endpoint. No adverse events related to AZA were reported and gout flares were noted in 6 subjects (mean 1.5 flares/patient with flares).Conclusion:AZA can be used safely in subjects with chronic refractory gout and appears to increase the frequency of subjects experiencing long term lowering of serum urate.References:Disclosure of Interests: :Hope Rainey: None declared, Herbert S.B. Baraf Grant/research support from: Horizon; Gilead Sciences, Inc.; Pfizer; Janssen; AbbVie, Consultant of: Horizon; Gilead Sciences, Inc.; Merck; AbbVie, Speakers bureau: Horizon, Anthony Yeo Employee of: Horizon, Peter Lipsky Consultant of: Horizon Therapeutics
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Schlesinger N, Yeo A, Lipsky P. THU0433 TREATMENT WITH PEGLOTICASE IMPROVES HEPATIC FIBROSIS ESTIMATED BY FIBROSIS-4 INDEX IN SUBJECTS WITH CHRONIC REFRACTORY GOUT. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.2360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:Hyperuricemia is associated with non-alcoholic fatty liver disease (NAFLD)1,2, but the relationship to fibrosis remains uncertain3. Moreover, it is not known whether lowering serum urate will affect the course of NAFLD. The availability of data from two randomized trials of pegloticase, a pegylated recombinant mammalian uricase, that profoundly decreases serum urate afforded the opportunity to test the hypothesis that lowering urate might improve NAFLD.Objectives:To determine whether treatment of chronic refractory gout patients with pegloticase was associated with improvement in NAFLD determined by Fibrosis 4 index (Fib4).Methods:Databases from patients with chronic refractory gout who participated in two randomized 6 month clinical trials (RCTs) of pegloticase were analyzed4. Sub-sets who had persistent urate lowering to levels <1 mg/dL in response to biweekly pegloticase (Responders, n=36) were compared to those who received placebo (n=43). Since liver biopsy information was not available on these subjects, we relied on Fib4, a validated non-invasive estimate of liver fibrosis in a variety of liver diseases5,6calculated from measurements of AST, ALT, platelet count and age (Age x AST/platelets x √ALT). A Fib4 value of 1.3 is an indication that further evaluation of liver disease is warranted.Results:At baseline, the mean Fib4 values were 1.40 ± 0.86 in pegloticase responders and 1.04 ± 0.53 in subjects receiving placebo. As shown in figure 1, subjects receiving placebo exhibited a change of 0.26 ± 0.41 in the Fib4 score over the six months of the RCTs compared with 0.13 ± 0.62 in the pegloticase responders (p=0.048; by linear regression). When only the subjects with a Fib4 value > 1.3 were considered, a significant difference in the change in the Fib4 values over the 6 months of the trial between pegloticase responders and those receiving placebo was also observed (-0.15 ± 0.67 vs 0.37 ± 0.42, p=0.004, by linear regression). The correlations between serum urate area under the curve (AUC) over the 6 months of the trial and the change in Fib4 value was rs=0.33, p=0.0.0004 (Spearman rank-order correlation coefficient). Finally, multiple linear regression analysis indicated serum urate AUC (as a surrogate measure for group) is the main contributor to the change in Fib4 (p=0.018 by linear regression).Conclusion:The data are consistent with the conclusion that persistent lowering of serum urate had a significant impact on Fib4 levels, implying a possible effect on the course of NAFLD. The results support a more complete analysis involving biopsy examination of the impact of urate on liver inflammation and fibrosis.References:[1]Yang C et al. PlosOne2017; 12:e0177249[2]Jaruvongvanich V et al. Eur J Gastroenterol Hepatol 2017; 29:1031[3]Jaruvongvanich V et al. Eur J Gastroenterol Hepatol 2017; 29:694[4]Sundy JS, et al. JAMA. 2011; 306 (7):711-20[5]Sterling RK et al. Hepatol 2006; 43:1317[6]Shah AG et al. Clin Gastroenterol Hepatol 2009;7:1104Disclosure of Interests: :Naomi Schlesinger Grant/research support from: Pfizer, Amgen, Consultant of: Novartis, Horizon Therapeutics, Selecta Biosciences, Olatec, IFM Therapeutics, Mallinckrodt Pharmaceuticals, Anthony Yeo Employee of: Horizon Therapeutics, Peter Lipsky Consultant of: Horizon Therapeutics
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Khor EQ, Lim JP, Tay L, Yeo A, Yew S, Ding YY, Lim WS. Obesity Definitions in Sarcopenic Obesity: Differences in Prevalence, Agreement and Association with Muscle Function. J Frailty Aging 2020; 9:37-43. [PMID: 32150212 DOI: 10.14283/jfa.2019.28] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND Sarcopenic obesity (SO) is associated with poorer physical performance in the elderly and will increase in relevance with population ageing and the obesity epidemic. The lack of a consensus definition for SO has resulted in variability in its reported prevalence, poor inter-definitional agreement, and disagreement on its impact on physical performance, impeding further development in the field. While sarcopenia definitions have been compared, the impact of obesity definitions in SO has been less well-studied. OBJECTIVES To compare 3 widely-adopted definitions of obesity in terms of SO prevalence, inter-definitional agreement, and association with muscle function. DESIGN Cross-sectional. SETTING GERILABS study, Singapore Participants: 200 community-dwelling, functionally-independent older adults. MEASUREMENTS We utilized three commonly-used definitions of obesity: body mass index (BMI), waist circumference (WC) and DXA-derived fat mass percentage (FM%). Sarcopenia was defined using Asian Working Group for Sarcopenia criteria. For muscle function, we assessed handgrip strength, gait speed and Short Physical Performance Battery (SPPB). Subjects were classified into 4 body composition phenotypes (normal, obese, sarcopenic and SO), and outcomes were compared between groups. RESULTS The prevalence rate for SO was lowest for BMI (0.5%) compared to FM% (10.0%) and WC (10.5%). Inter-definitional agreement was lowest between BMI and WC (κ=0.364), and at best moderate between FM% and WC (κ=0.583). SO performed the worst amongst body composition phenotypes in handgrip strength, gait speed and SPPB (all p<0.01) only when defined using WC. In regression analyses, SO was associated with decreased SPPB scores (β=-0.261, p=0.001) only for the WC definition. CONCLUSION There is large variation in the prevalence of SO across different obesity definitions, with low-to-moderate agreement between them. Our results corroborate recent evidence that WC, and thus central obesity, is best associated with poorer muscle function in SO. Thus, WC should be further explored in defining obesity for accurate and early characterization of SO among older adults in Asian populations.
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Affiliation(s)
- E Q Khor
- Ezra Qi-En Khor, Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Email address: , Telephone number: +65 63596474
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Chew J, Yeo A, Yew S, Lim JP, Tay L, Ding YY, Lim WS. Muscle Strength Definitions Matter: Prevalence of Sarcopenia and Predictive Validity for Adverse Outcomes Using the European Working Group on Sarcopenia in Older People 2 (EWGSOP2) Criteria. J Nutr Health Aging 2020; 24:614-618. [PMID: 32510114 DOI: 10.1007/s12603-020-1371-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND EWGSOP2 criteria for sarcopenia recommends the use of either handgrip strength (GS) or 5-times repeated chair stand test (RCS) as a muscle strength measure. We aim to compare the impact of different muscle strength definitions on sarcopenia prevalence and predictive validity for 2-year outcomes, using the EWGSOP2 clinical algorithm. METHODS We studied 200 community-dwelling older adults, comparing sarcopenia prevalence using three muscle strength definitions: 1) maximum GS (Asian Working Group cutoffs); 2) RCS-1 (standard cutoff >15s); and 3) RCS-2 (ROC-derived cutoff >12.5s). Two-year outcomes include: 1) Incident frailty (modified Fried criteria); 2) Physical performance [Short Physical Performance Battery (SPPB) score <10]; and 3) Quality of life [EuroQol-5 dimension (EQ-5D) <25th percentile]. We performed logistic regression on 2-year outcomes adjusted for age, gender, cognition and mood. RESULTS Prevalence of confirmed sarcopenia was 14.5%, 4% and 9% for GS, RCS-1 and RCS-2 respectively. For 2-year outcomes (N=183), RCS-2 predicted incident frailty (OR: 5.7, 95% CI 1.4-22.8, p=0.013), low SPPB (OR: 4.4, 95% CI 1.4-13.1, p=0.009), and trended towards predicting low QOL (OR: 2.1, 95% CI 0.9-4.9, p=0.095). In contrast, GS and RCS-1 did not predict frailty nor low QOL, but predicted low SPPB only (GS: OR 3.8, 95% CI 1.3-10.6, p=0.01; RCS-1: OR: 8.8, 95% CI 2.2-35.0, p=0.002). CONCLUSIONS Sarcopenia prevalence varies with muscle strength definitions, with GS being significantly higher vis-à-vis RCS definitions. Our results also support the use of population-specific over standard cutoffs for RCS to obtain intermediate estimates of sarcopenia prevalence and the best predictive validity for two-year outcomes.
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Affiliation(s)
- J Chew
- Dr. Justin Chew, Department of Geriatric Medicine, 11 Jalan Tan Tock Seng, Tan Tock Seng Hospital, Singapore 308433.
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Crowhurst T, Lightfoot J, Yeo A, Reddi B, Nguyen P, Whitford H, Holmes-Liew CL. Case report of severe bronchial web-like stenoses after 'surviving the unsurvivable'. BMC Pulm Med 2019; 19:119. [PMID: 31266473 PMCID: PMC6604203 DOI: 10.1186/s12890-019-0873-z] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 06/11/2019] [Indexed: 11/10/2022] Open
Abstract
Background There are few cases of multiple bronchial stenoses reported in the literature and none of the severity described here. The case is relevant due to its rareness, the pathophysiological insights derived, the successful interventional pulmonology strategies demonstrated, and as an example of a rare indication for high-risk lung transplantation. Case presentation A 47-year-old man developed multiple recurrent bronchial web-like stenoses five weeks after an episode of severe tracheo-bronchitis presumed secondary to a chemical inhalation injury which initially caused complete bilateral lung collapse necessitating veno-venous extracorporeal membrane oxygenation. The stenoses completely effaced bronchi in many locations causing severe type II respiratory failure requiring mechanical ventilation and bronchoscopic puncture / dilatation then ultimately bilateral lung transplantation. Conclusion This very rare case highlights the morbid sequelae that can arise after catastrophic tracheobronchitis which now, in the era of extracorporeal membrane oxygenation, may be survivable in the short-term.
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Affiliation(s)
- Thomas Crowhurst
- Discipline of Medicine, University of Adelaide, Adelaide, SA, 5000, Australia. .,Department of Thoracic Medicine, Central Adelaide Local Health Network, Royal Adelaide Hospital, 1 Port Road, Adelaide, SA, 5000, Australia.
| | - Joshua Lightfoot
- Intensive Care Unit, Central Adelaide Local Health Network, Royal Adelaide Hospital, 1 Port Road, Adelaide, SA, 5000, Australia
| | - Aeneas Yeo
- Discipline of Medicine, University of Adelaide, Adelaide, SA, 5000, Australia.,Department of Thoracic Medicine, Central Adelaide Local Health Network, Royal Adelaide Hospital, 1 Port Road, Adelaide, SA, 5000, Australia
| | - Benjamin Reddi
- Intensive Care Unit, Central Adelaide Local Health Network, Royal Adelaide Hospital, 1 Port Road, Adelaide, SA, 5000, Australia.,Discipline of Acute Care Medicine, University of Adelaide, Adelaide, SA, 5000, Australia
| | - Phan Nguyen
- Discipline of Medicine, University of Adelaide, Adelaide, SA, 5000, Australia.,Department of Thoracic Medicine, Central Adelaide Local Health Network, Royal Adelaide Hospital, 1 Port Road, Adelaide, SA, 5000, Australia
| | - Helen Whitford
- Department of Respiratory Medicine, The Alfred Hospital, 55 Commercial Road, Melbourne, Victoria, 3004, Australia.,Department of Medicine, Monash University, Wellington Road, Clayton, Victoria, 3800, Australia
| | - Chien-Li Holmes-Liew
- Discipline of Medicine, University of Adelaide, Adelaide, SA, 5000, Australia.,Department of Thoracic Medicine, Central Adelaide Local Health Network, Royal Adelaide Hospital, 1 Port Road, Adelaide, SA, 5000, Australia
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21
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Fontalis A, Hughes K, Nguyen MP, Williamson M, Yeo A, Lui D, Gelfer Y. The challenge of differentiating vaso-occlusive crises from osteomyelitis in children with sickle cell disease and bone pain: A 15-year retrospective review. J Child Orthop 2019; 13:33-39. [PMID: 30838073 PMCID: PMC6376437 DOI: 10.1302/1863-2548.12.180094] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
PURPOSE The paediatric sickle cell disease (SCD) osteomyelitis (OM) incidence is 0.3% to 12%. Differentiating vaso-occlusive crises (VOC) from OM is a diagnostic challenge, with limited evidence guiding management. We present a 15-year review of a paediatric sickle cell cohort. We aim to identify OM incidence and provide a management protocol for these children presenting with bone pain. METHODS A prospective database of children with haemoglobinopathies (2002 to 2017) was analyzed for temperature, C-reactive protein (CRP) and white cell count (WCC) on admission as well as imaging, treatment and cultures. OM diagnosis was supported by imaging and blood cultures. VOC was defined as bone pain that improved without antibiotics. RESULTS Over 15 years, 96 children with SCD presented 358 times to hospital. Empirical antibiotics were given in 308 presentations. There were five cases of OM (1.4%); two acute and three chronic. In all, 50 presentations of VOC were identified. No significant differences in age were noted between the OM and VOC group. Temperature and CRP were significantly elevated in the OM group with no significant difference in WCC. Cultures were only positive in the chronic OM admissions. There were no cases of septic arthritis. No surgical intervention was required. CONCLUSION In children with SCD presenting with persistent bone pain, fever, elevated CRP and WCC, OM should be suspected and prompt antibiotic treatment started. Our treatment pathway was successful avoiding OM in 98.6% and septic arthritis in 100%. Further research on novel biological markers distinguishing OM from VOC should be investigated. LEVEL OF EVIDENCE III.
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Affiliation(s)
- A. Fontalis
- Trauma and Orthopaedic Department, St George’s Hospital, London, UK
| | - K. Hughes
- Trauma and Orthopaedic Department, St George’s Hospital, London, UK
| | - M. P. Nguyen
- Trauma and Orthopaedic Department, St George’s Hospital, London, UK
| | - M. Williamson
- Trauma and Orthopaedic Department, St George’s Hospital, London, UK
| | - A. Yeo
- Trauma and Orthopaedic Department, St George’s Hospital, London, UK
| | - D. Lui
- Trauma and Orthopaedic Department, St George’s Hospital, London, UK
| | - Y. Gelfer
- Trauma and Orthopaedic Department, St George’s Hospital, London, UK,St George’s University of London, London, UK, Correspondence should be sent to Y. Gelfer, MD PhD FRCS, St Georges Hospitals NHS Foundation Trust, Trauma and Orthopaedic Department, St James Wing Level 5, Blackshaw Rd, London SW170QT, UK. E-mail:
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22
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Chew J, Tay L, Lim JP, Leung BP, Yeo A, Yew S, Ding YY, Lim WS. Serum Myostatin and IGF-1 as Gender-Specific Biomarkers of Frailty and Low Muscle Mass in Community-Dwelling Older Adults. J Nutr Health Aging 2019; 23:979-986. [PMID: 31781728 DOI: 10.1007/s12603-019-1255-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVES (i) To investigate serum myostatin (absolute and normalized for total body lean mass (TBLM)) and IGF-1 as biomarkers of frailty and low relative appendicular skeletal muscle mass (RASM) in older adults, and; (ii) to examine gender differences in the association of serum myostatin and IGF-1 levels with frailty and low RASM. DESIGN Cross-sectional study. SETTING The "Longitudinal Assessment of Biomarkers for characterization of early Sarcopenia and predicting frailty and functional decline in community-dwelling Asian older adults Study" (GERI-LABS) study in Singapore. PARTICIPANTS 200 subjects aged 50 years and older residing in the community. MEASUREMENTS Frailty was assessed using the modified Fried criteria. Low RASM was defined using cutoffs for height-adjusted appendicular skeletal muscle mass measured by dual-energy X-ray absorptiometry as recommended by the Asian Working Group for Sarcopenia. Comorbidities, cognitive and functional performance, physical activity and nutritional status were assessed. Blood samples collected included serum myostatin, insulin-like growth factor 1 (IGF-1) and markers of inflammation (total white cell count, CRP, IL-6 and TNFaR1). Subjects were classified into 4 groups: Frail/Prefrail with low RASM (Frail/Low RASM), Frail/Prefrail with normal RASM (Frail/Normal RASM), Robust with low RASM (Robust/Low RASM) and Robust with normal RASM (Robust/Normal RASM). RESULTS 63 (32%) subjects were classified as Frail/Low RASM, 53 (27%) Frail/Normal RASM, 28 (14%) Robust/Low RASM and 56 (28%) Robust/Normal RASM respectively. Frail/Low RASM subjects were older and had lower BMI compared to Frail/Normal RASM and robust subjects. Mean (SE) normalized myostatin levels were higher in Frail/Low RASM compared to Frail/Normal RASM subjects (1.0 (0.04) versus 0.84 (0.05) ng/ml/kg, P=0.01). Median (IQR) IGF-1 level was lower amongst Frail/Low RASM subjects compared to Frail/Normal RASM subjects (102.3, (77.7, 102.5) vs 119.7 (82.7, 146.0) ng/ml, P=0.046). No differences in myostatin or IGF-1 were observed among robust individuals with or without low muscle mass. In adjusted multinomial logistic regression models with Robust/Normal RASM as the reference group, myostatin (P=0.05) and IGF-1 (P=0.043) were associated with Frail/Low RASM status in the whole cohort. When stratified by gender, myostatin was significantly associated with Frail/Low RASM status in men only (P=0.03). In women, serum IGF-1 was associated with Frail/Low RASM status (P=0.046), but not myostatin (P=0.53). CONCLUSION Serum myostatin, normalized for TBLM in men and IGF-1 in women are potential biomarkers for frail individuals with low RASM, and may identify a target group for intervention.
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Affiliation(s)
- J Chew
- Dr Justin Chew, Department of Geriatric Medicine, 11 Jalan Tan Tock Seng, Tan Tock Seng Hospital, Singapore 308433,
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23
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Hodge G, Hodge S, Yeo A, Nguyen P, Hopkins E, Liu H, Holmes-Liew CL, Holmes M. BOS is associated with decreased HDAC2 from steroid resistant lymphocytes in the small airways. Clin Exp Immunol 2018; 195:277-285. [PMID: 30303525 DOI: 10.1111/cei.13221] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/03/2018] [Indexed: 11/30/2022] Open
Abstract
Immunosuppression therapies including corticosteroids fail to prevent bronchiolitis obliterans syndrome (BOS), primarily a disease of the small airways, following lung transplantation. We reported increases in steroid-resistant proinflammatory lymphocytes and their loss of histone deacetylase 2 (HDAC2), an important mediator of steroid action, in the blood of stable lung transplant recipients. We noted similar increases in the steroid-resistant lymphocytes in both the blood and small airways in BOS compared with the large airways. We hypothesized that these small airway cells would also exhibit a loss of HDAC2, and that these changes could be reversed by treatment with theophylline (HDAC2 activator). Blood, bronchoalveolar lavage and large and small airway brushings were collected from lung transplant patients with BOS (n = 12) or stable lung function (n = 18) and healthy aged-matched controls (n = 13). Intracellular proinflammatory cytokines [interferon (IFN-γ) and tumour necrosis factor (TNF)-α and HDAC2 were measured in CD8+ T, natural killer (NK) T-like and NK cells from cultured small airway brushings ± 5 mg/l theophylline ± 1 µM prednisolone using flow cytometry. Increased small airway CD8 T, NK T-like and NK cells were identified in BOS versus stable transplant and controls. In BOS, these cells exhibited increased IFN-γ/TNF-α and a loss of HDAC2. HDAC2 expression by small airway CD8+ T cells correlated with forced expiratory volume in 1 s (FEV1 ) (R = 0·880, P = 0·031). Theophylline and prednisolone synergistically up-regulated HDAC2 in CD8+ T cells. BOS is associated with loss of HDAC2 from steroid-resistant proinflammatory CD8+ T, NK T-like and NK cells in the small airways. Therapeutically increasing HDAC2 in these lymphocytes may reduce steroid resistance and improve graft survival.
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Affiliation(s)
- G Hodge
- Lung Research, Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, South Australia, Australia.,Department of Medicine, University of Adelaide, Adelaide, South Australia, Australia
| | - S Hodge
- Lung Research, Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, South Australia, Australia.,Department of Medicine, University of Adelaide, Adelaide, South Australia, Australia
| | - A Yeo
- Lung Research, Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, South Australia, Australia.,Department of Medicine, University of Adelaide, Adelaide, South Australia, Australia
| | - P Nguyen
- Lung Research, Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, South Australia, Australia.,Department of Medicine, University of Adelaide, Adelaide, South Australia, Australia
| | - E Hopkins
- Lung Research, Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, South Australia, Australia
| | - H Liu
- Lung Research, Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, South Australia, Australia.,Department of Medicine, University of Adelaide, Adelaide, South Australia, Australia
| | - C L Holmes-Liew
- Lung Research, Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, South Australia, Australia.,Department of Medicine, University of Adelaide, Adelaide, South Australia, Australia.,South Australian Lung Transplant Service, Adelaide, South Australia, Australia
| | - M Holmes
- Lung Research, Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, South Australia, Australia.,Department of Medicine, University of Adelaide, Adelaide, South Australia, Australia.,South Australian Lung Transplant Service, Adelaide, South Australia, Australia
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Hodge G, Hodge S, Nguyen PT, Yeo A, Sarkar P, Badiei A, Holmes‐Liew CL, Reynolds PN, Holmes M. Bronchiolitis obliterans syndrome is associated with increased p-glycoprotein expression and loss of glucocorticoid receptor from steroid-resistant proinflammatory CD8 + T cells. Clin Exp Immunol 2018; 192:242-250. [PMID: 29352737 PMCID: PMC5904702 DOI: 10.1111/cei.13103] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 01/08/2018] [Accepted: 01/09/2018] [Indexed: 12/31/2022] Open
Abstract
Immunosuppressive therapy fails to suppress the production of proinflammatory cytokines, particularly by CD8+ T cells, in stable lung transplant recipients and those undergoing chronic rejection, suggesting that some patients may become relatively resistant to immunosuppressants such as glucocorticoids (GC). We have shown loss of GC receptor (GCR) from the CD8+ cells, and we hypothesized that the drug membrane efflux pump, p-glycoprotein-1 (Pgp), may also be involved in lymphocyte steroid resistance following lung transplant. Pgp/GCR expression and interferon (IFN)-γ/tumour necrosis factor (TNF)-α proinflammatory cytokine production was measured in blood lymphocytes from 15 stable lung transplant patients, 10 patients with bronchiolitis obliterans syndrome (BOS) and 10 healthy aged-matched controls (± prednisolone ± Pgp inhibitor, cyclosporin A ± GCR activator, Compound A) using flow cytometry. Both Pgp+ and Pgp- lymphocyte subsets from all subjects produced IFN-γ/TNF-α proinflammatory cytokines. Pgp expression was increased in CD8+ Pgp+ T cells and correlated with IFN-γ/TNF-α expression and BOS grade. Reduced GCR was observed in CD8+ Pgp- T, natural killer (NK) T-like and NK cells from stable patients compared with controls, and reduced further in CD8+ Pgp- T cells in BOS. The addition of 2·5 ng/ml cyclosporin A and 1 µM prednisolone inhibit IFN-γ/TNF-α production significantly by CD8+ Pgp+ T cells from BOS patients. The addition of 10 µM Compound A and 1 µM prednisolone inhibit IFN-γ/TNF-α production significantly by CD8+ Pgp- T cells from BOS patients. BOS is associated with increased Pgp expression and loss of GCR from steroid-resistant proinflammatory CD8+ T cells. Treatments that inhibit Pgp and up-regulate GCR in CD8+ T cells may improve graft survival.
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Affiliation(s)
- G. Hodge
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
- Department of MedicineUniversity of AdelaideAdelaideSouth Australia
| | - S. Hodge
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
- Department of MedicineUniversity of AdelaideAdelaideSouth Australia
| | - P. T. Nguyen
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
- Department of MedicineUniversity of AdelaideAdelaideSouth Australia
| | - A. Yeo
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
| | - P. Sarkar
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
| | - A. Badiei
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
| | - C. L. Holmes‐Liew
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
- Department of MedicineUniversity of AdelaideAdelaideSouth Australia
- South Australian Lung Transplant ServiceAdelaideSouth Australia
| | - P. N. Reynolds
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
- Department of MedicineUniversity of AdelaideAdelaideSouth Australia
| | - M. Holmes
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
- Department of MedicineUniversity of AdelaideAdelaideSouth Australia
- South Australian Lung Transplant ServiceAdelaideSouth Australia
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25
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Abstract
AIMS Clavicle fracture nonunions are extremely rare in children. The aim of this systematic review was to assess what factors may predispose children to form clavicle fracture nonunions and evaluate the treatment methods and outcomes. METHODS We performed a systematic review according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, aiming to find papers reporting clavicle fracture nonunion in children under the age of 18 years. Data was collected on patient demographics, fracture type, mechanism of injury (MOI), surgical intervention and reported outcome. Two independent reviewers evaluated all the data. RESULTS A total of 13 articles reporting 21 cases of clavicle fracture nonunion were identified. The mean age at time of injury was 11.4 years (4 to 17). Falls were the most common MOI. The majority of nonunions occurred after displaced fractures on the right side. Six were refractures. Mean time of presentation following injury was 13.5 months (4 to 60). In all, 16 were treated surgically. Radiographic union was eventually achieved in 12 cases, with functional outcome satisfactory in all cases. CONCLUSION Clavicle nonunion is an extremely rare but possible complication in children. The majority occur after displaced right-sided fractures or refractures and present around one year after injury. Surgical fixation provides good radiographic healing and functional outcomes. LEVEL OF EVIDENCE IV.
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Affiliation(s)
- K. Hughes
- Trauma and Orthopaedic Department, St. George’s Hospitals NHS Foundation Trust, London, UK
| | - J. Kimpton
- Trauma and Orthopaedic Department, St. George’s Hospitals NHS Foundation Trust, London, UK
| | - R. Wei
- Trauma and Orthopaedic Department, St. George’s Hospitals NHS Foundation Trust, London, UK
| | - M. Williamson
- Trauma and Orthopaedic Department, St. George’s Hospitals NHS Foundation Trust, London, UK
| | - A. Yeo
- Trauma and Orthopaedic Department, St. George’s Hospitals NHS Foundation Trust, London, UK
| | - M. Arnander
- Trauma and Orthopaedic Department, St. George’s Hospitals NHS Foundation Trust, London, UK
| | - Y. Gelfer
- Trauma and Orthopaedic Department, St. George’s Hospitals NHS Foundation Trust, London, UK,St. George’s University of London, London, UK, Correspondence should be sent to Y. Gelfer, St George’s Hospitals NHS Foundation Trust, Trauma and Orthopaedic Department, St James Wing Level 5, Blackshaw Rd, London SW170QT, United Kingdom E-mail:
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26
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Lim YH, Yeo A, Koh MP, Wong CY. Severely Injured Patients Presenting to the Singapore General Hospital: a one Year Study. HONG KONG J EMERG ME 2017. [DOI: 10.1177/102490790301000104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Study objectives To determine the quantity and resource utilisation in management of the severely injured patients presenting at the Singapore General Hospital (SGH). Method All patients who were initially triaged to the hospital Emergency Department's (ED) resuscitation room and all trauma related mortality in the year 1998 were studied. All records were traced and the cases were followed up. Important outcomes studied were mortality and length of hospital stay. Results Three hundred and forty-seven (0.2%) severely injured patients who were initially treated at the ED's resuscitation room were studied. The median age of the patients was 32 years old. Male patients formed 82.1% of the total. The three main causes of trauma in such patients were fall from height, motor vehicle related accidents and penetrating injuries caused by sharp instruments and firearms. Of all the patients, 62.8% were admitted to the ED between 1601 hours to 0759 hours and 30.5% of all severely injured patients were treated at the ED on weekends. One hundred and twenty three (35.4%) patients had emergency surgery within 24 hours of admission to the ED and 42.4% of the patients had an ISS score of 16 or more; 22.8% of patients had ISS score of 25 or more. The mortality of patients with ISS score of 25 or more was 39.2%. Conclusion One percent of all new ED patients with trauma were classified as ‘severely’ injured and these occurred mostly outside “normal working hours”. There was significant mortality in patients with ISS score of 25 or more.
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Affiliation(s)
| | - A Yeo
- Singapore General Hospital, Department of General Surgery and Trauma Service
| | - MP Koh
- Singapore General Hospital, Department of General Surgery
| | - CY Wong
- Singapore General Hospital, Department of General Surgery
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27
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Yeo A, Chong M, Tay L, Yew S, Tan C, Ismail N, Lim W. TRENDS AND PREDICTORS OF 2-YEAR ACTIVITY PARTICIPATION IN COMMUNITY DWELLING OLDER ADULTS. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.3245] [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: 11/13/2022] Open
Affiliation(s)
- A. Yeo
- Institute of Geriatrics and Active Ageing, Tan Tock Seng Hospital, Singapore, Singapore, Singapore,
| | - M. Chong
- Institute of Geriatrics and Active Ageing, Tan Tock Seng Hospital, Singapore, Singapore, Singapore,
- Geriatric and Education Research Institute, MOH, Singapore, Singapore,
| | - L. Tay
- Institute of Geriatrics and Active Ageing, Tan Tock Seng Hospital, Singapore, Singapore, Singapore,
- Sengkang health, Singapore, Singapore,
| | - S.P. Yew
- Institute of Geriatrics and Active Ageing, Tan Tock Seng Hospital, Singapore, Singapore, Singapore,
| | - C. Tan
- Institute of Geriatrics and Active Ageing, Tan Tock Seng Hospital, Singapore, Singapore, Singapore,
| | - N. Ismail
- Continuing and Community Care, TTSH, Singapore, Singapore,
| | - W. Lim
- Institute of Geriatrics and Active Ageing, Tan Tock Seng Hospital, Singapore, Singapore, Singapore,
- Department of Geriatric Medicine, Tan Tock Seng Hospital, Singapore, Singapore
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28
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Yew S, Lim W, Chong M, Yeo A, Tan C, Ismail N, Tay L. LONGITUDINAL CHANGES IN NUTRITIONAL STATUS; SARCOPENIA PROGRESSION IN COMMUNITY-DWELLING OLDER ADULTS. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.2088] [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: 11/12/2022] Open
Affiliation(s)
- S.P. Yew
- IGA, Tan Tock Seng Hospital, Singapore, Singapore,
| | - W. Lim
- IGA, Tan Tock Seng Hospital, Singapore, Singapore,
- Geriatric Medicine, TTSH, Singapore, Singapore,
| | - M. Chong
- IGA, Tan Tock Seng Hospital, Singapore, Singapore,
- Ministry of Health, Singapore, Singapore,
| | - A. Yeo
- IGA, Tan Tock Seng Hospital, Singapore, Singapore,
| | - C. Tan
- IGA, Tan Tock Seng Hospital, Singapore, Singapore,
| | - N. Ismail
- Continuing and Community Care, TTSH, Singapore, Singapore
| | - L. Tay
- IGA, Tan Tock Seng Hospital, Singapore, Singapore,
- Sengkang Health, Singapore, Singapore,
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Yang YX, Chong MS, Lim WS, Tay L, Yew S, Yeo A, Tan CH. Validity of estimating muscle and fat volume from a single MRI section in older adults with sarcopenia and sarcopenic obesity. Clin Radiol 2017; 72:427.e9-427.e14. [PMID: 28117037 DOI: 10.1016/j.crad.2016.12.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Revised: 12/07/2016] [Accepted: 12/15/2016] [Indexed: 01/10/2023]
Affiliation(s)
- Y X Yang
- Institute of Geriatrics and Active Ageing, Tan Tock Seng Hospital, Singapore.
| | - M S Chong
- Institute of Geriatrics and Active Ageing, Tan Tock Seng Hospital, Singapore; Department of Geriatric Medicine, Tan Tock Seng Hospital, Singapore
| | - W S Lim
- Department of Geriatric Medicine, Tan Tock Seng Hospital, Singapore
| | - L Tay
- Institute of Geriatrics and Active Ageing, Tan Tock Seng Hospital, Singapore; Department of Geriatric Medicine, Tan Tock Seng Hospital, Singapore
| | - S Yew
- Institute of Geriatrics and Active Ageing, Tan Tock Seng Hospital, Singapore
| | - A Yeo
- Institute of Geriatrics and Active Ageing, Tan Tock Seng Hospital, Singapore
| | - C H Tan
- Department of Diagnostic Radiology, Tan Tock Seng Hospital, Singapore
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30
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Chai-Coetzer CL, Antic NA, Hamilton GS, McArdle N, Wong K, Yee BJ, Yeo A, Ratnavadivel R, Naughton MT, Roebuck T, Woodman R, McEvoy RD. Physician Decision Making and Clinical Outcomes With Laboratory Polysomnography or Limited-Channel Sleep Studies for Obstructive Sleep Apnea: A Randomized Trial. Ann Intern Med 2017; 166:332-340. [PMID: 28114683 DOI: 10.7326/m16-1301] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND The clinical utility of limited-channel sleep studies (which are increasingly conducted at home) versus laboratory polysomnography (PSG) for diagnosing obstructive sleep apnea (OSA) is unclear. OBJECTIVE To compare patient outcomes after PSG versus limited-channel studies. DESIGN Multicenter, randomized, noninferiority study. (Australian New Zealand Clinical Trials Registry: ACTRN12611000926932). SETTING 7 academic sleep centers. PARTICIPANTS Patients (n = 406) aged 25 to 80 years with suspected OSA. INTERVENTION Sleep study information disclosed to sleep physicians comprised level 1 (L1) PSG data (n = 135); level 3 (L3), which included airflow, thoracoabdominal bands, body position, electrocardiography, and oxygen saturation (n = 136); or level 4 (L4), which included oxygen saturation and heart rate (n = 135). MEASUREMENTS The primary outcome was change in Functional Outcomes of Sleep Questionnaire (FOSQ) score at 4 months. Secondary outcomes included the Epworth Sleepiness Scale (ESS), the Sleep Apnea Symptoms Questionnaire (SASQ), continuous positive airway pressure (CPAP) compliance, and physician decision making. RESULTS Change in FOSQ score was not inferior for L3 (mean difference [MD], 0.01 [95% CI, -0.47 to 0.49; P = 0.96]) or L4 (MD, -0.46 [CI, -0.94 to 0.02; P = 0.058]) versus L1 (noninferiority margin [NIM], -1.0). Compared with L1, change in ESS score was not inferior for L3 (MD, 0.08 [CI, -0.98 to 1.13; P = 0.89]) but was inconclusive for L4 (MD, 1.30 [CI, 0.26 to 2.35; P = 0.015]) (NIM, 2.0). For L4 versus L1, there was less improvement in SASQ score (-17.8 vs. -24.7; P = 0.018), less CPAP use (4.5 vs. 5.3 hours per night; P = 0.04), and lower physician diagnostic confidence (P = 0.003). LIMITATION Limited-channel studies were simulated by extracting laboratory PSG data and were not done in the home. CONCLUSION The results support manually scored L3 testing in routine practice. Poorer outcomes with L4 testing may relate, in part, to reduced physician confidence. PRIMARY FUNDING SOURCE National Health and Medical Research Council and Repat Foundation.
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Affiliation(s)
- Ching Li Chai-Coetzer
- From Flinders University, Repatriation General Hospital, and Royal Adelaide Hospital, Adelaide, South Australia; Monash Health, Monash University, and The Alfred Hospital, Melbourne, Victoria; Sir Charles Gairdner Hospital, Perth, Western Australia; Royal Prince Alfred Hospital & Woolcock Institute of Medical Research, Sydney, New South Wales; and Gosford Hospital, Gosford, New South Wales, Australia
| | - Nick A Antic
- From Flinders University, Repatriation General Hospital, and Royal Adelaide Hospital, Adelaide, South Australia; Monash Health, Monash University, and The Alfred Hospital, Melbourne, Victoria; Sir Charles Gairdner Hospital, Perth, Western Australia; Royal Prince Alfred Hospital & Woolcock Institute of Medical Research, Sydney, New South Wales; and Gosford Hospital, Gosford, New South Wales, Australia
| | - Garun S Hamilton
- From Flinders University, Repatriation General Hospital, and Royal Adelaide Hospital, Adelaide, South Australia; Monash Health, Monash University, and The Alfred Hospital, Melbourne, Victoria; Sir Charles Gairdner Hospital, Perth, Western Australia; Royal Prince Alfred Hospital & Woolcock Institute of Medical Research, Sydney, New South Wales; and Gosford Hospital, Gosford, New South Wales, Australia
| | - Nigel McArdle
- From Flinders University, Repatriation General Hospital, and Royal Adelaide Hospital, Adelaide, South Australia; Monash Health, Monash University, and The Alfred Hospital, Melbourne, Victoria; Sir Charles Gairdner Hospital, Perth, Western Australia; Royal Prince Alfred Hospital & Woolcock Institute of Medical Research, Sydney, New South Wales; and Gosford Hospital, Gosford, New South Wales, Australia
| | - Keith Wong
- From Flinders University, Repatriation General Hospital, and Royal Adelaide Hospital, Adelaide, South Australia; Monash Health, Monash University, and The Alfred Hospital, Melbourne, Victoria; Sir Charles Gairdner Hospital, Perth, Western Australia; Royal Prince Alfred Hospital & Woolcock Institute of Medical Research, Sydney, New South Wales; and Gosford Hospital, Gosford, New South Wales, Australia
| | - Brendon J Yee
- From Flinders University, Repatriation General Hospital, and Royal Adelaide Hospital, Adelaide, South Australia; Monash Health, Monash University, and The Alfred Hospital, Melbourne, Victoria; Sir Charles Gairdner Hospital, Perth, Western Australia; Royal Prince Alfred Hospital & Woolcock Institute of Medical Research, Sydney, New South Wales; and Gosford Hospital, Gosford, New South Wales, Australia
| | - Aeneas Yeo
- From Flinders University, Repatriation General Hospital, and Royal Adelaide Hospital, Adelaide, South Australia; Monash Health, Monash University, and The Alfred Hospital, Melbourne, Victoria; Sir Charles Gairdner Hospital, Perth, Western Australia; Royal Prince Alfred Hospital & Woolcock Institute of Medical Research, Sydney, New South Wales; and Gosford Hospital, Gosford, New South Wales, Australia
| | - Rajeev Ratnavadivel
- From Flinders University, Repatriation General Hospital, and Royal Adelaide Hospital, Adelaide, South Australia; Monash Health, Monash University, and The Alfred Hospital, Melbourne, Victoria; Sir Charles Gairdner Hospital, Perth, Western Australia; Royal Prince Alfred Hospital & Woolcock Institute of Medical Research, Sydney, New South Wales; and Gosford Hospital, Gosford, New South Wales, Australia
| | - Matthew T Naughton
- From Flinders University, Repatriation General Hospital, and Royal Adelaide Hospital, Adelaide, South Australia; Monash Health, Monash University, and The Alfred Hospital, Melbourne, Victoria; Sir Charles Gairdner Hospital, Perth, Western Australia; Royal Prince Alfred Hospital & Woolcock Institute of Medical Research, Sydney, New South Wales; and Gosford Hospital, Gosford, New South Wales, Australia
| | - Teanau Roebuck
- From Flinders University, Repatriation General Hospital, and Royal Adelaide Hospital, Adelaide, South Australia; Monash Health, Monash University, and The Alfred Hospital, Melbourne, Victoria; Sir Charles Gairdner Hospital, Perth, Western Australia; Royal Prince Alfred Hospital & Woolcock Institute of Medical Research, Sydney, New South Wales; and Gosford Hospital, Gosford, New South Wales, Australia
| | - Richard Woodman
- From Flinders University, Repatriation General Hospital, and Royal Adelaide Hospital, Adelaide, South Australia; Monash Health, Monash University, and The Alfred Hospital, Melbourne, Victoria; Sir Charles Gairdner Hospital, Perth, Western Australia; Royal Prince Alfred Hospital & Woolcock Institute of Medical Research, Sydney, New South Wales; and Gosford Hospital, Gosford, New South Wales, Australia
| | - R Doug McEvoy
- From Flinders University, Repatriation General Hospital, and Royal Adelaide Hospital, Adelaide, South Australia; Monash Health, Monash University, and The Alfred Hospital, Melbourne, Victoria; Sir Charles Gairdner Hospital, Perth, Western Australia; Royal Prince Alfred Hospital & Woolcock Institute of Medical Research, Sydney, New South Wales; and Gosford Hospital, Gosford, New South Wales, Australia
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Ragg PG, Cahoon G, Yeo A, Chalkiadis G. A Clinical Audit to Assess the Efficacy of the Coolsense® Pain Numbing Applicator for Intravenous Cannulation in Children. Anaesth Intensive Care 2017; 45:251-255. [DOI: 10.1177/0310057x1704500216] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The Coolsense® device is a topical applicator that is used to anaesthetise the skin before a painful procedure. It is a handheld device with a temperature-controlled head that acts on application, without chemicals, to cool and anaesthetise the site of injection. This prospective observational audit of 100 children and adolescents aged six to 18 years studied the analgesic efficacy and patient and carer satisfaction rating of the device during intravenous cannulation and complications arising from its use. The audit demonstrated effective skin analgesia for intravenous cannulation in children and adolescents. Ninety-four percent of patients rated the pain during cannulation as less than or equal to three on a numerical pain rating scale of zero to ten. Patient and carer satisfaction with the device and cannulation success rates were high; 66% of patients and 82% of carers ‘really liked’ the device and 28% of patients and 12% of carers ‘liked’ it. Ninety-five percent of patients were cannulated on the first attempt. The incidence of complications using the device was low. The Coolsense device appears to be a useful tool that provides effective analgesia for intravenous cannulation in children with minimal complications. Comparative studies with topical local anaesthesia creams are warranted.
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Affiliation(s)
- P. G. Ragg
- Consultant Anaesthetist, Department of Anaesthesia and Pain Management, Royal Children's Hospital, Murdoch Childrens Research Institute, Department of Paediatrics, University of Melbourne, Melbourne, Victoria
| | - G. Cahoon
- Radiographer, Department of Anaesthesia and Pain Management, Department of Medical Imaging, Royal Children's Hospital, Melbourne, Victoria
| | - A. Yeo
- Anaesthetist, Department of Anaesthesia and Pain Management, Royal Children's Hospital, Melbourne, Victoria
| | - G. Chalkiadis
- Head of Pain Management, Department of Anaesthesia and Pain Management, Royal Children's Hospital, Murdoch Childrens Research Institute, Melbourne, Department of Paediatrics, University of Melbourne, Melbourne, Victoria
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Garzo V, Yeo A, Su I, Cook-Andersen H, Meldrum D, Duleba A. High pregnancy rates can be achieved with elective single embryo transfer offered to all patients. Fertil Steril 2016. [DOI: 10.1016/j.fertnstert.2016.07.510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Tay L, Ding YY, Leung BP, Ismail NH, Yeo A, Yew S, Tay KS, Tan CH, Chong MS. Sex-specific differences in risk factors for sarcopenia amongst community-dwelling older adults. Age (Dordr) 2015; 37:121. [PMID: 26607157 PMCID: PMC5005859 DOI: 10.1007/s11357-015-9860-3] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 11/17/2015] [Indexed: 06/01/2023]
Abstract
With considerable variation including potential sex-specific differential rate of skeletal muscle loss, identifying modifiable factors for sarcopenia will be pivotal to guide targeted interventions. This study seeks to identify clinical and biological correlates of sarcopenia in community-dwelling older adults, with emphasis on the role of anabolic and catabolic stimuli, and special reference to gender specificity. In this cross-sectional study involving 200 community-dwelling and functionally independent older adults aged ≥50 years, sarcopenia was defined using the Asian Working Group for Sarcopenia criteria. Comorbidities, cognitive and functional performance, physical activity and nutritional status were routinely assessed. Biochemical parameters included haematological indices, lipid panel, vitamin D level, anabolic hormones [insulin-like growth factor-1 (IGF-1), free testosterone (males only)] and catabolic markers [inflammatory markers (interleukin-6, C-reactive protein) and myostatin]. Multiple logistic regression was performed to identify independent predictors for sarcopenia. Age was associated with sarcopenia in both genders. Malnutrition conferred significantly higher odds for sarcopenia in women (OR = 5.71, 95% CI 1.13-28.84.44, p = 0.035) while higher but acceptable range serum triglyceride was protective in men (OR = 0.05, 95% CI 0.00-0.52, p = 0.012). Higher serum myostatin independently associated with higher odds for sarcopenia in men (OR = 1.11, 95% CI 1.00-1.24, p = 0.041). Serum IGF-1 was significantly lower amongst female sarcopenic subjects, with demonstrable trend for protective effect against sarcopenia in multiple regression models, such that each 1 ng/ml increase in IGF-1 was associated with 1% decline in odds of sarcopenia in women (p = 0.095). Our findings support differential pathophysiological mechanisms for sarcopenia that, if corroborated, may have clinical utility in guiding sex-specific targeted interventions for community-dwelling older adults.
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Affiliation(s)
- L Tay
- Department of Geriatric Medicine, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore, 308433, Singapore.
- Institute of Geriatrics and Active Ageing, Tan Tock Seng Hospital, Singapore, Singapore.
| | - Y Y Ding
- Department of Geriatric Medicine, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore, 308433, Singapore
- Institute of Geriatrics and Active Ageing, Tan Tock Seng Hospital, Singapore, Singapore
| | - B P Leung
- Department of Rheumatology, Allergy and Immunology, Tan Tock Seng Hospital, Singapore, Singapore
- Department of Physiology, National University of Singapore, Singapore, Singapore
| | - N H Ismail
- Department of Geriatric Medicine, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore, 308433, Singapore
- Department of Continuing and Community Care, Tan Tock Seng Hospital, Singapore, Singapore
| | - A Yeo
- Institute of Geriatrics and Active Ageing, Tan Tock Seng Hospital, Singapore, Singapore
| | - S Yew
- Institute of Geriatrics and Active Ageing, Tan Tock Seng Hospital, Singapore, Singapore
| | - K S Tay
- Department of Rheumatology, Allergy and Immunology, Tan Tock Seng Hospital, Singapore, Singapore
| | - C H Tan
- Department of Pharmacology, National University of Singapore, Singapore, Singapore
| | - M S Chong
- Department of Geriatric Medicine, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore, 308433, Singapore
- Institute of Geriatrics and Active Ageing, Tan Tock Seng Hospital, Singapore, Singapore
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Ng D, McClements K, Yeo A, Chen X, Png E, Ng C. Efficacy of supervised exercise training in patients post bariatric surgery. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.1973] [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: 10/23/2022]
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Seo Y, Ji YW, Lee SM, Shim J, Noh H, Yeo A, Park C, Park MS, Chang EJ, Lee HK. Activation of HIF-1α (hypoxia inducible factor-1α) prevents dry eye-induced acinar cell death in the lacrimal gland. Cell Death Dis 2014; 5:e1309. [PMID: 24967971 PMCID: PMC4611733 DOI: 10.1038/cddis.2014.260] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2014] [Revised: 04/21/2014] [Accepted: 04/22/2014] [Indexed: 12/22/2022]
Abstract
The pathogenesis of immune-mediated lacrimal gland (LG) dysfunction in Sjögren's syndrome has been thoroughly studied. However, the majority of dry eye (DE) is not related to Sjögren type, and its pathophysiology remains unclear. The purpose of this study was to determine and investigate the protective mechanisms against DE stress in mice. DE induced prominent blood vessel loss without apoptosis or necrosis in the LG. Autophagic vacuoles, distressed mitochondria, and stressed endoplasmic reticulum were observed via electron microscopy. Immunoblotting confirmed the increase in autophagic markers. Glycolytic activities were enhanced with increasing levels of succinate and malate that, in turn, activated hypoxia-inducible factor (HIF)-1α. Interestingly, the areas of stable HIF-1α expression overlapped with COX-2 and MMP-9 upregulation in LGs of DE-induced mice. We generated HIF-1α conditional knockout (CKO) mice in which HIF-1α expression was lost in the LG. Surprisingly, normal LG polarities and morphologies were completely lost with DE induction, and tremendous acinar cell apoptosis was observed. Similar to Sjögren's syndrome, CD3+ and CD11b+ cells infiltrated HIF-1α CKO LGs. Our results show that DE induced the expression of HIF-1α that activated autophagy signals to prevent further acinar cell damage and to maintain normal LG function.
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Affiliation(s)
- Y Seo
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - Y W Ji
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - S M Lee
- 1] Schephens Eye Research Institute, Harvard Medical School, Boston, MA, USA [2] Department of Ophthalmology, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Gyeonggi-do, Korea
| | - J Shim
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - H Noh
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - A Yeo
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - C Park
- Clinical Trials Center, Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea
| | - M S Park
- Clinical Trials Center, Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea
| | - E J Chang
- Department of Anatomy and Cell Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - H K Lee
- 1] Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea [2] Institute of Corneal Dystrophy Research, Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea
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Bahrt K, Yeo A, Howson T, Ottery F. SAT0376 Uric Acid Levels as a Biomarker of Efficacy and Safety in Patients Treated with Pegloticase: Lessons Learned from us Clinical Experience. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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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Malamet R, Howson T, Yeo A, Bahrt K. SAT0355 Real World Risk of Infusion Reactions with Pegloticase Treatment: Findings from Post-Approval us Safety Data. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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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Garner DJ, Berlowitz DJ, Douglas J, Harkness N, Howard M, McArdle N, Naughton MT, Neill A, Piper A, Yeo A, Young A. Home mechanical ventilation in Australia and New Zealand. Eur Respir J 2012; 41:39-45. [PMID: 22653765 DOI: 10.1183/09031936.00206311] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
This study aims to describe the pattern of home mechanical ventilation (HMV) usage in Australia and New Zealand. 34 centres providing HMV in the region were identified and asked to complete a questionnaire regarding centre demographics, patient diagnoses, HMV equipment and settings, staffing levels and methods employed to implement and follow-up therapy. 28 (82%) centres responded, providing data on 2,725 patients. The minimum prevalence of HMV usage was 9.9 patients per 100,000 population in Australia and 12.0 patients per 100,000 population in New Zealand. Variation existed across Australian states (range 4-13 patients per 100,000 population) correlating with population density (r=0.82; p<0.05). The commonest indications for treatment were obesity hypoventilation syndrome (OHS) (31%) and neuromuscular disease (NMD) (30%). OHS was more likely to be treated in New Zealand, in smaller, newer centres, whilst NMD was more likely to be treated in Australia, in larger, older centres. Chronic obstructive pulmonary disease was an uncommon indication (8.0%). No consensus on indications for commencing treatment was found. In conclusion, the prevalence of HMV usage varies across Australia and New Zealand according to centre location, size and experience. These findings can assist HMV service planning locally and highlight trends in usage that may be relevant in other countries.
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Affiliation(s)
- Daniel J Garner
- The Alfred Hospital, Prahran, Melbourne, Victoria, Australia.
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Ballal H, Kamyab R, Wood B, Yeo A, Abdul Aziz F. Risk of additional axillary metastases after micrometastases in sentinel lymph node in a Western Australian population. Breast 2012. [DOI: 10.1016/j.breast.2011.12.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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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Kadappu K, Boyd A, Eshoo S, Haluka B, Yeo A, Marwick T, Thomas L. Is Left Atrial Changes in Diabetes Mellitus More Than Diastolic Dysfunction? Heart Lung Circ 2012. [DOI: 10.1016/j.hlc.2012.05.524] [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: 11/25/2022]
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Yeo A, Cheok C, Teoh SH, Zhang ZY, Buser D, Bosshardt DD. Lateral ridge augmentation using a PCL-TCP scaffold in a clinically relevant but challenging micropig model. Clin Oral Implants Res 2011; 23:1322-32. [DOI: 10.1111/j.1600-0501.2011.02366.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/02/2011] [Indexed: 12/11/2022]
Affiliation(s)
- A. Yeo
- Department of Restorative Dentistry; National Dental Centre; SingHealth; Singapore
| | - C. Cheok
- Department of Restorative Dentistry; National Dental Centre; SingHealth; Singapore
| | | | - Z. Y. Zhang
- Centre for Biomedical Material Applications and Technology (BIOMAT); Singapore
| | - D. Buser
- Department of Oral Surgery and Stomatology; School of Dental Medicine; University of Bern; Bern; Switzerland
| | - D. D. Bosshardt
- Department of Oral Surgery and Stomatology; School of Dental Medicine; University of Bern; Bern; Switzerland
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Yeo A, Wong WJ, Khoo HH, Teoh SH. Surface modification of PCL-TCP scaffolds improve interfacial mechanical interlock and enhance early bone formation: Anin vitroandin vivocharacterization. J Biomed Mater Res A 2010; 92:311-21. [DOI: 10.1002/jbm.a.32366] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Ratnavadivel R, Chau N, Stadler D, Yeo A, McEvoy RD, Catcheside PG. Marked Reduction in Obstructive Sleep Apnea Severity in Slow Wave Sleep. J Clin Sleep Med 2009. [DOI: 10.5664/jcsm.27651] [Citation(s) in RCA: 106] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Rajeev Ratnavadivel
- Adelaide Institute for Sleep Health, Repatriation General Hospital, Adelaide, Australia
- School of Medicine, Faculty of Health Sciences, Flinders University, Adelaide, Australia
| | - Nuy Chau
- School of Medicine, Faculty of Health Sciences, Flinders University, Adelaide, Australia
| | - Daniel Stadler
- Adelaide Institute for Sleep Health, Repatriation General Hospital, Adelaide, Australia
- Discipline of Physiology, School of Molecular and Biomedical Science, University of Adelaide, Adelaide, Australia
| | - Aeneas Yeo
- Adelaide Institute for Sleep Health, Repatriation General Hospital, Adelaide, Australia
| | - R. Doug McEvoy
- Adelaide Institute for Sleep Health, Repatriation General Hospital, Adelaide, Australia
- School of Medicine, Faculty of Health Sciences, Flinders University, Adelaide, Australia
- Discipline of Physiology, School of Molecular and Biomedical Science, University of Adelaide, Adelaide, Australia
| | - Peter G. Catcheside
- Adelaide Institute for Sleep Health, Repatriation General Hospital, Adelaide, Australia
- School of Medicine, Faculty of Health Sciences, Flinders University, Adelaide, Australia
- Discipline of Physiology, School of Molecular and Biomedical Science, University of Adelaide, Adelaide, Australia
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Ratnavadivel R, Chau N, Stadler D, Yeo A, McEvoy RD, Catcheside PG. Marked reduction in obstructive sleep apnea severity in slow wave sleep. J Clin Sleep Med 2009; 5:519-24. [PMID: 20465017 PMCID: PMC2792966] [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] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
INTRODUCTION Obstructive sleep apnea (OSA) is widely accepted to improve during slow wave sleep (SWS) compared to lighter stages of NREM sleep. However, supporting data to establish the magnitude and prevalence of this effect is lacking. Consequently, we examined this phenomenon, controlling for posture, in a large group of patients investigated for OSA at an academic clinical sleep service. METHODS A detailed retrospective analysis was conducted on data obtained from each 30-sec epoch of sleep in 253 consecutive full-night diagnostic polysomnography studies performed over a 3-month period. Respiratory and arousal event rates were calculated within each stage of sleep, in the supine and lateral postures, and across the whole night, with OSA patients classified on the basis of an overall apnea-hypopnea index (AHI) > or =15 events/h. Central sleep apnea (CSA) patients were defined by a central apnea index > 5/h. Sleep latency and time, and respiratory and arousal event rates in OSA, CSA, and non-OSA patients were compared between sleep stages and postures using linear mixed model analysis. The numbers of patients achieving reduced event rates in SWS and in the lateral posture were also examined. RESULTS There were 171 patients with OSA, 14 with CSA, and 68 non-OSA patients. OSA patients took significantly longer to achieve slow wave and REM sleep (p < 0.001) than non-OSA patients and had less stage 4 sleep (p = 0.037). There were striking improvements in AHI and arousal index (Al) from stage 1 to 4 NREM sleep (p <0.001), with intermediate levels in REM sleep. AHI and Al were also markedly reduced in lateral versus supine sleep in all sleep stages (p < 0.001), with an effect size comparable to that of the slow wave sleep effect. The majority of OSA patients achieved low respiratory event rates in SWS. Eighty-two percent of patients achieved an AHI <15 and 57% < 5 events/hour during stage 4 sleep. CONCLUSION Although OSA patients demonstrate both a delayed and reduced proportion of SWS compared to non-OSA subjects, once they achieved SWS, AHI, and Al markedly improved in most patients.
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Affiliation(s)
- Rajeev Ratnavadivel
- Adelaide Institute for Sleep Health, Repatriation General Hospital, Adelaide, Australia.
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Yeo A, Seck K, Daumer M, Schneider KTM, Pildner von Steinburg S. Charakteristika fetaler und maternaler Signale in der CTG-Aufzeichnung – Eine nicht-interventionelle, deskriptive Analyse von CTG-Daten. Geburtshilfe Frauenheilkd 2008. [DOI: 10.1055/s-0028-1088754] [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: 10/19/2022] Open
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Yeo A, Rai B, Sju E, Cheong JJ, Teoh SH. The degradation profile of novel, bioresorbable PCL-TCP scaffolds: an in vitro and in vivo study. J Biomed Mater Res A 2008; 84:208-18. [PMID: 17607768 DOI: 10.1002/jbm.a.31454] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Degradation studies of scaffolds are important in bone tissue engineering. Previously, novel poly(epsilon-caprolactone)-20% tricalcium phosphate (PCL-TCP) based scaffolds were developed and proven useful for bone regeneration. In this study in vitro degradation analyses were carried out with the PCL-TCP scaffolds immersed in standard culture medium for 24 weeks. In vivo degradation was performed with the scaffolds implanted in the abdomen of rats for the same period of time. Results demonstrated greater degradation of PCL-TCP scaffolds in vivo than in vitro. At 24 weeks, the increase of average porosity of the scaffolds in vivo was 29.2% compared to 2.65% in vitro. Gel permeation chromatography (GPC) analysis revealed a decrease of 29% and 20% respectively in the Mn and Mw values after 24 weeks in vitro. However, a significant decrease in Mn and Mw values (79.6% and 88.7% respectively) were recorded in vivo. The mechanical properties however, were relatively similar and closely match those of cancellous bone even at 24 weeks. The results showed that the scaffold can be used for dentoalveolar reconstruction and PCL-TCP scaffolds have shown to possess the potential to degrade within the desired time period of 5-6 months and favorable mechanical properties.
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Affiliation(s)
- A Yeo
- National Dental Centre, Department of Restorative Dentistry, SingHealth, Singapore
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Brar R, Ahluwahla G, Yeo A. Endovascular Aneurysm Repair for Abdominal Aortic Aneurysm (AAA). Ann R Coll Surg Engl 2007. [DOI: 10.1308/rcsann.2007.89.8.828] [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: 11/22/2022] Open
Affiliation(s)
- R Brar
- St Mary's Hospital Paddington, London, UK
| | | | - A Yeo
- St Mary's Hospital Paddington, London, UK
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Yeo A, Lee C, Pang J. Flip chip solder joint reliability analysis using viscoplastic and elastic-plastic-creep constitutive models. ACTA ACUST UNITED AC 2006. [DOI: 10.1109/tcapt.2006.875893] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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