0000000000961096
AUTHOR
L Chen
showing 12 related works from this author
Death following pulmonary complications of surgery before and during the SARS-CoV-2 pandemic
2021
Association of Surgeons in Training Surgical Summit, online, 17 Oct 2020 - 17 Oct 2020 2021 Virtual Annual Meeting / Surgical Research Society, online, 24 Mar 2021 - 25 Mar 2021, National Research Collaborative Meeting, online, 10 Dec 2020 - 10 Dec 2020, Royal Australasian College of Surgeons Annual Academic Surgery Conference, online, 5 Nov 2020 - 5 Nov 2020; The British journal of surgery : BJS 108(12), 1448-1464 (2021). doi:10.1093/bjs/znab336
Delaying surgery for patients with a previous SARS-CoV-2 infection
2020
With at least 28 elective million operations delayed during the first three months of the COVID-19 pandemic, the number of patients who will require surgery after a previous SARS-CoV-2 infection is likely to increase rapidly1. Operating on patients with an active perioperative SARS-CoV-2 infection is now known to carry a very high pulmonary complication and mortality rate2. Urgent information is needed to guide whether postponing surgery in patients with a previous SARS-CoV-2 infection leads to a clinical benefit, and the optimal length of delay.
Large-scale association analysis identifies 13 new susceptibility loci for coronary artery disease
2011
1. The CARDIoGRAM Consortium. Large-scale association analysis identifies 13 new susceptibility loci for coronary artery disease. Nature Genetics. 2011;43:333–338. ### Study Hypothesis Recently, genome-wide association studies (GWAS) have identified several common variants that are associated with risk of coronary artery disease (CAD) and myocardial infarction (MI). The authors state that the current loci discovered in CAD and MI GWAS explain only a small fraction of the heritability of this complex disease. The authors hypothesized that a larger study would provide more power to discover common variants with modest effect sizes. Therefore, they formed the Coronary ARtery DIsease Genome-wid…
Large-scale gene-centric analysis identifies novel variants for coronary artery disease.
2011
Coronary artery disease (CAD) has a significant genetic contribution that is incompletely characterized. To complement genome-wide association (GWA) studies, we conducted a large and systematic candidate gene study of CAD susceptibility, including analysis of many uncommon and functional variants. We examined 49,094 genetic variants in ∼2,100 genes of cardiovascular relevance, using a customised gene array in 15,596 CAD cases and 34,992 controls (11,202 cases and 30,733 controls of European descent; 4,394 cases and 4,259 controls of South Asian origin). We attempted to replicate putative novel associations in an additional 17,121 CAD cases and 40,473 controls. Potential mechanisms through w…
Search for supersymmetric particles in events with lepton pairs and large missing transverse momentum in sqrt{s} = 7 TeV proton-proton collisions wit…
2011
Results are presented of searches for the production of supersymmetric particles decaying into final states with missing transverse momentum and exactly two isolated leptons in √ s = 7 TeV proton–proton collisions at the Large Hadron Collider. Search strategies requiring lepton pairs with identical-sign or opposite-sign electric charges are described. In a data sample corresponding to an integrated luminosity of 35 pb−1 collected with the ATLAS detector, no significant excesses are observed. Based on specific benchmark models, limits are placed on the squark mass between 450 and 690 GeV for squarks approximately degenerate in mass with gluinos, depending on the supersymmetric mass hierarchy…
Effect of COVID-19 pandemic lockdowns on planned cancer surgery for 15 tumour types in 61 countries: an international, prospective, cohort study
2021
This international, prospective, cohort study enrolled 20 006 adult (≥18 years) patients from 466 hospitals in 61 countries with 15 cancer types, who had a decision for curative surgery during the COVID-19 pandemic and were followed up until the point of surgery or cessation of follow-up (Aug 31, 2020). Average national Oxford COVID-19 Stringency Index scores were calculated to define the government response to COVID-19 for each patient for the period they awaited surgery, and classified into light restrictions (index 60). The primary outcome was the non-operation rate (defined as the proportion of patients who did not undergo planned surgery). Cox proportional-hazards regression models wer…
Preoperative nasopharyngeal swab testing and postoperative pulmonary complications in patients undergoing elective surgery during the SARS-CoV-2 pand…
2021
Abstract Background Surgical services are preparing to scale up in areas affected by COVID-19. This study aimed to evaluate the association between preoperative SARS-CoV-2 testing and postoperative pulmonary complications in patients undergoing elective cancer surgery. Methods This international cohort study included adult patients undergoing elective surgery for cancer in areas affected by SARS-CoV-2 up to 19 April 2020. Patients suspected of SARS-CoV-2 infection before operation were excluded. The primary outcome measure was postoperative pulmonary complications at 30 days after surgery. Preoperative testing strategies were adjusted for confounding using mixed-effects models. Results Of 8…
Performance of the ATLAS detector using first collision data
2010
More than half a million minimum-bias events of LHC collision data were collected by the ATLAS experiment in December 2009 at centre-of-mass energies of 0.9 TeV and 2.36 TeV. This paper reports on studies of the initial performance of the ATLAS detector from these data. Comparisons between data and Monte Carlo predictions are shown for distributions of several track- and calorimeter-based quantities. The good performance of the ATLAS detector in these first data gives confidence for successful running at higher energies.
STUDIO CLINICO RANDOMIZZATO DEL THYMOGLOBULIN/ALEMTUZUMAB VS. THYMOGLOBULIN/DACLIZUMAB COME INDUZIONE COMBINATA (CON ELIMINAZIONE DI CORTICOSTEROIDI)…
2009
Introduzione: Uno studio prospettico randomizzato che valuta l’efficacia del Thymoglobulin (Thymo) in combinazione con l’Alemtuzumab (CH1) versus Daclizumab (DAC) deve ancora essere riportato. Materiali e metodi: Da Febbraio 2006 a Ottobre 2008, 148 riceventi di trapianto di rene da donatore cadavere (DC) e da donatore vivente (DV) HLA non identico furono randomizzati in due gruppi (N=74 per gruppo): il gruppo A (THYMO/CH1) e il gruppo B (THYMO/DAC) con ridotto dosaggio di tacrolimus (livelli target di 6-8 ng/ml), micofenolato sodico (EC-MPS) 360 mg due volte al giorno per il gruppo A e 720 mg due volte al giorno per il gruppo B ed eliminazione dei corticosteroidi ad una settimana dall’inte…
UNA NUOVA STRATEGIA TERAPEUTICA NEI PAZIENTI RICEVENTI TRAPIANTO DI RENE DA DONATORE VIVENTE SENSIBILIZZATI CON ANTICORPI ANTI-HLA SPECIFICI CONTRO I…
2009
Introduzione: I riceventi sensibilizzati con anticorpi anti-HLA specifici contro il donatore (ASD) hanno un elevato rischio di rigetto anticorpo e cellulo-mediato. Un nuovo approccio terapeutico è stato designato per affrontare questo problema presso il nostro centro. Materiali e metodi: Da Gennaio a Dicembre 2007, 19 pazienti con ASD hanno ricevuto un trapianto di rene da donatore vivente (11 da donatori consanguinei, 8 da non consanguinei). Tutti i pazienti hanno ricevuto un singolo trattamento plasmaferetico prima dell’intervento. La terapia di induzione prevedeva Thymoglobulin 1 mg/Kg per 3 dosi (trapianto pediatrico) o 5 dosi (ritrapianto), Zenapax 1mg/kg (2 dosi), Rituxan 375 mg/m2 (1…
PROFILASSI UNIVERSALE CONTRO IL CITOMEGALOVIRUS CON VALGANCICLOVIR NEI SOGGETTI RICEVENTI TRAPIANTO DI RENE
2009
Introduzione: In questo studio descriviamo l’incidenza di infezione da citomegalovirus (CMV) e della malattia da CMV dopo profilassi universale contro il CMV con valganciclovir orale in un gruppo di pazienti riceventi trapianto di rene trattati in differenti studi clinici randomizzato con un potente regime immunosoppressivo. Metodi: Da Maggio 2000 a Ottobre 2008, 622 riceventi (R) il primo trapianto di rene da donatore (D) vivente e cadavere furono randomizzato in differenti protocolli. Questo report descrive in dettaglio l’incidenza dell’infezione e della malattia da CMV. Tutti i pazienti furono trattati con ganciclovir® endovenoso per 3 giorni, seguito dalla somministrazione orale quotidi…
INCIDENZA DEL DIABETE MELLITO TIPO 2 DOPO TRAPIANTO COMBINATO RENE-PANCREAS
2009
Introduzione: Scopo di questo studio è determinare il tasso di incidenza del diabete mellito (DM) tipo 2 dopo trapianto combinato di rene-pancreas (SPK). Materiali e metodi: da Settembre 2000 a Gennaio 2008, è stato eseguito uno studio randomizzato a lungo termine, prospettico, in un singolo centro su 164 riceventi di SPK con drenaggio endocrino sistemico ed esocrino vescicale, comparando la rapamicina (Gruppo A, n=82) vs micofenolato mofetile (Gruppo B, n=82). La terapia all’induzione incluse in entrambi i gruppi l’uso di daclizumab (1mg/kg, 2 dosi) e timoglobulina (1mg/kg, 5 dosi). La terapia immunosoppressiva di mantenimento in entrambi i gruppi incluse inoltre tacrolimus e corticosteroi…