RESUMEN
BACKGROUND: PLAnning Treatment For Oesophago-gastric Cancer: a Randomised Maintenance Therapy Trial (PLATFORM) is an adaptive phase II study assessing the role of maintenance therapies in advanced oesophago-gastric (OG) adenocarcinoma. We evaluated the role of the anti-programmed death-ligand 1 (PD-L1) inhibitor durvalumab in these patients. PATIENTS AND METHODS: Patients with human epidermal growth factor receptor 2-negative locally advanced or metastatic OG adenocarcinoma with disease control or response to 18 weeks of platinum-based first-line chemotherapy were randomised to active surveillance or maintenance durvalumab. The primary endpoint was progression-free survival (PFS). Safety was assessed in all patients who had commenced surveillance visits or received at least one dose of durvalumab. Exploratory survival analyses according to PD-L1 Combined Positive Score (CPS) and immune (biomarker-positive) or angiogenesis dominant (biomarker-negative) tumour microenvironment (TME) phenotypes were conducted. RESULTS: Between March 2015 and April 2020, 205 patients were randomised to surveillance (n = 100) and durvalumab (n = 105). No significant differences were seen in PFS [hazard ratio (HR) 0.84, P = 0.13] and overall survival (OS; HR 0.98, P = 0.45) between surveillance and durvalumab. Five patients randomised to durvalumab demonstrated incremental radiological responses compared with none with surveillance. Treatment-related adverse events occurred in 77 (76.2%) durvalumab-assigned patients. A favourable effect in OS with durvalumab over surveillance in CPS ≥5 and immune biomarker-positive patients was observed compared with CPS <5 and biomarker-negative subgroups, respectively: CPS ≥5 versus <5: HR 0.63, 95% confidence interval (CI) 0.32-1.22 versus HR 0.93, 95% CI 0.44-1.96; biomarker-positive versus negative: HR 0.60, 95% CI 0.29-1.23 versus HR 0.84, 95% CI 0.42-1.65. CONCLUSION: Maintenance durvalumab does not improve PFS in patients with OG adenocarcinoma who respond to first-line chemotherapy but induced incremental radiological responses in a subset of patients. TME characterisation could refine patient selection for anti-PD-L1 therapy above PD-L1 CPS alone.
Asunto(s)
Adenocarcinoma , Anticuerpos Monoclonales , Neoplasias Esofágicas , Neoplasias Gástricas , Humanos , Masculino , Femenino , Persona de Mediana Edad , Neoplasias Gástricas/tratamiento farmacológico , Anciano , Anticuerpos Monoclonales/uso terapéutico , Anticuerpos Monoclonales/farmacología , Adenocarcinoma/tratamiento farmacológico , Neoplasias Esofágicas/tratamiento farmacológico , Adulto , Antineoplásicos Inmunológicos/uso terapéutico , Antineoplásicos Inmunológicos/farmacología , Receptor ErbB-2/metabolismo , Anciano de 80 o más Años , Supervivencia sin ProgresiónRESUMEN
Determining the death burden for prioritising public health interventions necessitates detailed data on the causal pathways to death. Postmortem minimally invasive tissue sampling (MITS), incorporating histology, molecular and microbial culture diagnostics, enhances cause-of-death attribution, particularly for infectious deaths. MITS proves a valid alternative to full diagnostic autopsies, especially in low- and middle-income countries. In Soweto, South Africa (SA), the Child Health and Mortality Prevention Surveillance (CHAMPS) programme has delineated over 1 000 child and stillbirth deaths since 2017. This SA CHAMPS site supports advocating for the use of postmortem MITS as routine practice, for more granular insights into under-5 mortality causes. This knowledge is crucial for SA's pursuit of Sustainable Development Goal 3.2, targeting reduced neonatal and under-5 mortality rates. This commentary explores the public health advantages and ethicolegal considerations surrounding implementing MITS as standard of care for stillbirths, neonatal and paediatric deaths in SA. Furthermore, based on the data from CHAMPS, we present three pragmatic algorithmic approaches to the wide array of testing options for cost-effectiveness and scalability of postmortem MITS in South African state facilities.
Asunto(s)
Mortalidad del Niño , Nivel de Atención , Niño , Recién Nacido , Embarazo , Femenino , Humanos , Sudáfrica , Causas de Muerte , Mortinato , AutopsiaRESUMEN
PURPOSE: We explored survivors' experiences of chronic bowel symptoms following pelvic radiotherapy, strategies employed in living with these symptoms, effects on daily activities, and roles at home and in the workplace. METHODS: Semi-structured interviews were conducted with 28 individuals (10 gynaecological, 14 prostate, four anal/rectal cancer survivors) who had completed pelvic radiotherapy at least six months prior to data collection and who had experience of bowel symptoms during this post-treatment period. Reflexive thematic analysis was undertaken. RESULTS: We propose four themes describing a process leading from experience of symptoms to withdrawal from activities and roles. These are (1) losing control (the experience of unintended anal leakage or discharge); (2) experiencing embarrassment and fear (the experience of embarrassment or fear of embarrassment as a result of discharge becoming public); (3) managing and reacting (acting to reduce the likelihood of discharge or to prevent this becoming public); and (4) restriction and withdrawal (avoiding specific activities or situations so as to reduce or remove the risk of embarrassment). Returning to the workplace presented additional challenges across these themes. CONCLUSIONS: Impacts of chronic bowel symptoms can be severe. Survivors employ a variety of methods and strategies in living with their symptoms. Some of these support continued role fulfilment but some constitute a withdrawal from pre-treatment roles. Current healthcare provision and statutory protections fail to fully meet needs following pelvic radiotherapy. IMPLICATIONS FOR CANCER SURVIVORS: There is a need to develop and implement evidence-based services and supported self-management programmes for survivors experiencing chronic bowel problems post-radiotherapy.
RESUMEN
BACKGROUND: Aspirin and eicosapentaenoic acid (EPA) have colorectal polyp prevention activity, alone and in combination. This study measured levels of plasma and rectal mucosal oxylipins in participants of the seAFOod 2 × 2 factorial, randomised, placebo-controlled trial, who received aspirin 300 mg daily and EPA 2000 mg free fatty acid, alone and in combination, for 12 months. METHODS: Resolvin (Rv) E1, 15-epi-lipoxin (LX) A4 and respective precursors 18-HEPE and 15-HETE (with chiral separation) were measured by ultra-high performance liquid chromatography-tandem mass spectrometry in plasma taken at baseline, 6 months and 12 months, as well as rectal mucosa obtained at trial exit colonoscopy at 12 months, in 401 trial participants. RESULTS: Despite detection of S- and R- enantiomers of 18-HEPE and 15-HETE in ng/ml concentrations, RvE1 or 15epi-LXA4 were not detected above a limit of detection of 20 pg/ml in plasma or rectal mucosa, even in individuals randomised to both aspirin and EPA. We have confirmed in a large clinical trial cohort that prolonged (12 months) treatment with EPA is associated with increased plasma 18-HEPE concentrations (median [inter-quartile range] total 18-HEPE 0.51 [0.21-1.95] ng/ml at baseline versus 0.95 [0.46-4.06] ng/ml at 6 months [P<0.0001] in those randomised to EPA alone), which correlate strongly with respective rectal mucosal 18-HEPE levels (r = 0.82; P<0.001), but which do not predict polyp prevention efficacy by EPA or aspirin. CONCLUSION: Analysis of seAFOod trial plasma and rectal mucosal samples has not provided evidence of synthesis of the EPA-derived specialised pro-resolving mediator RvE1 or aspirin-trigged lipoxin 15epi-LXA4. We cannot rule out degradation of individual oxylipins during sample collection and storage but readily measurable precursor oxylipins argues against widespread degradation.
Asunto(s)
Aspirina , Lipoxinas , Humanos , Aspirina/uso terapéutico , Ácido Eicosapentaenoico/uso terapéutico , Oxilipinas , Membrana MucosaRESUMEN
BACKGROUND: In the face of the COVID-19 pandemic, the Defence Science and Technology Laboratory (Dstl) and Defence Pathology combined to form the Defence Clinical Lab (DCL), an accredited (ISO/IEC 17025:2017) high-throughput SARS-CoV-2 PCR screening capability for military personnel. LABORATORY STRUCTURE AND RESOURCE: The DCL was modular in organisation, with laboratory modules and supporting functions combining to provide the accredited SARS-CoV-2 (envelope (E)-gene) PCR assay. The DCL was resourced by Dstl scientists and military clinicians and biomedical scientists. LABORATORY RESULTS: Over 12 months of operation, the DCL was open on 289 days and tested over 72 000 samples. Six hundred military SARS-CoV-2-positive results were reported with a median E-gene quantitation cycle (Cq) value of 30.44. The lowest Cq value for a positive result observed was 11.20. Only 64 samples (0.09%) were voided due to assay inhibition after processing started. CONCLUSIONS: Through a sustained effort and despite various operational issues, the collaboration between Dstl scientific expertise and Defence Pathology clinical expertise provided the UK military with an accredited high-throughput SARS-CoV-2 PCR test capability at the height of the COVID-19 pandemic. The DCL helped facilitate military training and operational deployments contributing to the maintenance of UK military capability. In offering a bespoke capability, including features such as testing samples in unit batches and oversight by military consultant microbiologists, the DCL provided additional benefits to the UK Ministry of Defence that were potentially not available from other SARS-CoV-2 PCR laboratories. The links between Dstl and Defence Pathology have also been strengthened, benefitting future research activities and operational responses.
RESUMEN
Objetivo Dados los desafíos inherentes al diagnóstico y tratamiento de las mujeres embarazadas con urolitiasis, nos proponemos revisar las modalidades de imagen y el manejo endourológico actual de estas pacientes. Materiales y métodos se realizó una revisión de la literatura disponible sobre la urolitiasis en el embarazo. Esto incluyó la evaluación, el diagnóstico por imágenes y las opciones terapéuticas. Las bases de datos en las que se realizó la búsqueda fueron Google Scholar y PubMed. Se examinaron un total de 346 resúmenes. Tras aplicar los criterios de inclusión y exclusión quedaron 42 publicaciones: 18 estudios retrospectivos, 10 revisiones o metaanálisis, 8 conjuntos de directrices, 5 ensayos de control aleatorizados y una cohorte prospectiva. Resultados Iniciamos nuestra revisión con la literatura disponible sobre la seguridad y eficacia de las modalidades de imagen en la planificación quirúrgica de la urolitiasis en pacientes embarazadas. Esto incluye la ecografía renal, la radiografía abdominal, la tomografía computarizada y la resonancia magnética. Mientras que la tomografía computarizada puede suponer una exposición mayor a la radiación, con posibles problemas de seguridad, la resonancia magnética, aunque es una prueba menos sensible, parece ser más segura. A continuación se describen la seguridad, la eficacia y los resultados de diversas intervenciones quirúrgicas para la urolitiasis en pacientes embarazadas, como son la colocación de un stent ureteral, la nefrostomía percutánea, la ureteroscopia, la litotricia extracorpórea por ondas de choque y la nefrolitotomía percutánea. La ureteroscopia es un abordaje más seguro, pero la nefrolitotomía percutánea ofrece tasas mayores de ausencia de cálculos. Utilizando un enfoque basado en la evidencia, proponemos un algoritmo para el manejo de las mujeres embarazadas con cólico renal (AU)
Objective Given the challenges involved in diagnosis and treatment of pregnant women with urolithiasis, we aim to review the imaging modalities and current endourological management of these patients. Materials and methods We performed a review of the available literature on urolithiasis in pregnancy. This included evaluation, diagnostic imaging, and therapeutic options. The databases we searched from included Google Scholar and PubMed. A total of 346 abstracts were screened. After our inclusion/exclusion criteria were met, we were left with 42 sources: 18 retrospective studies, 10 reviews/meta-analyses, 8 sets of guidelines, 5 randomized control trials, and one prospective cohort. Results We begin our review with the literature available on the safety and efficacy of imaging modalities in the surgical planning for urolithiasis in pregnant patients. This includes renal ultrasound, abdominal x-ray, computed tomography scan, and magnetic resonance imaging. While computed tomography may result in an added radiation exposure, with possible safety concerns, magnetic resonance imaging seems to be safer, however a less sensitive test. We next describe safety, efficacy, and outcomes of various surgical interventions for urolithiasis in pregnant patients. This encompasses ureteral stenting, percutaneous nephrostomy, ureteroscopy, extracorporeal shock wave lithotripsy, and percutaneous nephrolithotomy. Ureteroscopy is a safer approach, but percutaneous nephrolithotomy offers higher stone-free rates. Using an evidence-based approach, we propose an algorithm for management of the pregnant women with renal colic. Conclusion Management of the pregnant women with suspected urolithiasis is a unique challenge for healthcare providers. A multi-disciplinary approach should be taken to optimize outcomes through an evidence-based approach (AU)
Asunto(s)
Humanos , Femenino , Embarazo , Ureteroscopía/métodos , Urolitiasis/diagnóstico por imagen , Urolitiasis/cirugía , Complicaciones del Embarazo/diagnóstico por imagen , Complicaciones del Embarazo/cirugía , Tomografía Computarizada por Rayos X , Imagen por Resonancia Magnética , UltrasonografíaRESUMEN
OBJECTIVE: Given the challenges involved in diagnosis and treatment of pregnant women with urolithiasis, we aim to review the imaging modalities and current endourological management of these patients. MATERIALS AND METHODS: We performed a review of the available literature on urolithiasis in pregnancy. This included evaluation, diagnostic imaging, and therapeutic options. The databases we searched from included Google Scholar and PubMed. A total of 346 abstracts were screened. After our inclusion/exclusion criteria were met, we were left with 42 sources: 18 retrospective studies, 10 reviews/meta-analyses, 8 sets of guidelines, 5 randomized control trials, and 1 prospective cohort. RESULTS: We begin our review with the literature available on the safety and efficacy of imaging modalities in the surgical planning for urolithiasis in pregnant patients. This includes renal ultrasound, abdominal x-ray, computed tomography scan, and magnetic resonance imaging. While computed tomography may result in an added radiation exposure, with possible safety concerns, magnetic resonance imaging seems to be safer, however a less sensitive test. We next describe safety, efficacy, and outcomes of various surgical interventions for urolithiasis in pregnant patients. This encompasses ureteral stenting, percutaneous nephrostomy, ureteroscopy, extracorporeal shock wave lithotripsy, and percutaneous nephrolithotomy. Ureteroscopy is a safer approach, but percutaneous nephrolithotomy offers higher stone-free rates. Using an evidence-based approach, we propose an algorithm for management of the pregnant women with renal colic. CONCLUSION: Management of the pregnant women with suspected urolithiasis is a unique challenge for healthcare providers. A multi-disciplinary approach should be taken to optimize outcomes through an evidence-based approach.
Asunto(s)
Urolitiasis , Femenino , Humanos , Embarazo , Estudios Prospectivos , Estudios Retrospectivos , Resultado del Tratamiento , Ureteroscopía/métodos , Urolitiasis/diagnóstico por imagen , Urolitiasis/cirugíaRESUMEN
Biological invasions are accelerating worldwide, causing major ecological and economic impacts in aquatic ecosystems. The urgent decision-making needs of invasive species managers can be better met by the integration of biodiversity big data with large-domain models and data-driven products. Remotely sensed data products can be combined with existing invasive species occurrence data via machine learning models to provide the proactive spatial risk analysis necessary for implementing coordinated and agile management paradigms across large scales. We present a workflow that generates rapid spatial risk assessments on aquatic invasive species using occurrence data, spatially explicit environmental data, and an ensemble approach to species distribution modeling using five machine learning algorithms. For proof of concept and validation, we tested this workflow using extensive spatial and temporal hybridization and occurrence data from a well-studied, ongoing, and climate-driven species invasion in the upper Flathead River system in northwestern Montana, USA. Rainbow Trout (RBT; Oncorhynchus mykiss), an introduced species in the Flathead River basin, compete and readily hybridize with native Westslope Cutthroat Trout (WCT; O. clarkii lewisii), and the spread of RBT individuals and their alleles has been tracked for decades. We used remotely sensed and other geospatial data as key environmental predictors for projecting resultant habitat suitability to geographic space. The ensemble modeling technique yielded high accuracy predictions relative to 30-fold cross-validated datasets (87% 30-fold cross-validated accuracy score). Both top predictors and model performance relative to these predictors matched current understanding of the drivers of RBT invasion and habitat suitability, indicating that temperature is a major factor influencing the spread of invasive RBT and hybridization with native WCT. The congruence between more time-consuming modeling approaches and our rapid machine-learning approach suggest that this workflow could be applied more broadly to provide data-driven management information for early detection of potential invaders.
RESUMEN
BACKGROUND: exposure to iodinated contrast media (ICM) can cause hyperthyroidism, due to disruption of thyroid hormone regulation. Although rare, it can have severe consequences and can lead to fatal complications. Current guidelines do not recommend standard laboratory testing of the thyroid function prior to ICM exposure. Prophylactic treatment of patients at higher risk of hyperthyroidism is not advised. CASE PRESENTATION: we report the case of an 82-year-old woman who developed ICM induced hyperthyroidism after undergoing a chest computed tomography (CT). One month after ICM administration she presented with pneumonia at the emergency department. Hyperthyroidism was found with concomitant tachycardia, which was hard to control. As a result of hyperthyroidism and coincidental pneumonia the patient developed heart failure and died of myocardial ischemia. CONCLUSIONS: this case report underlines the importance of close monitoring of high-risk patients after ICM exposure. Clinicians should be aware of the risk of hyperthyroidism and potential severe complications. The use of ICM needs careful consideration, especially in the elderly who suffer more often from multinodular goitre.
Asunto(s)
Medios de Contraste , Insuficiencia Cardíaca , Hipertiroidismo , Taquicardia , Anciano de 80 o más Años , Femenino , Humanos , Medios de Contraste/efectos adversos , Resultado Fatal , Insuficiencia Cardíaca/etiología , Hipertiroidismo/inducido químicamente , Hipertiroidismo/complicaciones , Radiografía Torácica , Taquicardia/etiología , Tomografía Computarizada por Rayos XRESUMEN
BACKGROUND: The evidence base underlying clinical practice in children's general surgery is poor and high-quality collaborative clinical research is required to address current treatment uncertainties. The aim of this study was, through a consensus process, to identify research priorities for clinical research in this field amongst surgeons who treat children. METHODS: Questions were invited in a scoping survey amongst general surgeons and specialist paediatric surgeons. These were refined by the study team and subsequently prioritized in a two-stage modified Delphi process. RESULTS: In the scoping survey, a total of 226 questions covering a broad scope of children's elective and emergency general surgery were submitted by 76 different clinicians. These were refined to 71 research questions for prioritization. A total of 168 clinicians took part in stage one of the prioritization process, and 157 in stage two. A 'top 10' list of priority research questions was generated for both elective and emergency general surgery of childhood. These cover a range of conditions and concepts, including inguinal hernia, undescended testis, appendicitis, abdominal trauma and enhanced recovery pathways. CONCLUSION: Through consensus amongst surgeons who treat children, 10 priority research questions for each of the elective and emergency fields have been identified. These should provide a basis for the development of high-quality multicentre research projects to address these questions, and ultimately improve outcomes for children requiring surgical care.
Asunto(s)
Investigación Biomédica/normas , Técnica Delphi , Cirugía General/normas , Prioridades en Salud , Niño , Consenso , Procedimientos Quirúrgicos Electivos , Humanos , Cirujanos , Encuestas y Cuestionarios , Reino UnidoRESUMEN
The clinical effectiveness of screening is highly dependent on uptake. Previous randomised controlled trials suggest that non-participant reminders, which highlight the opportunity to re-book an appointment, can improve participation. The present analysis examines the impact of implementing these reminders within the English Flexible Sigmoidoscopy (FS) Screening Programme, which offers once-only FS screening to adults aged 55-59 years. We assessed the screening status of 26,339 individuals invited for once-only FS screening in England. A total of 10,952 (41.6%) had attended screening, and were subsequently ineligible. The remaining 15,387 had not attended screening, and were selected to receive a reminder, 1-2 years after their invitation. Descriptive statistics were used to assess the increase in uptake and the adenoma detection rate (ADR) of those who self-referred, six months after the delivery of the final reminder. Pearson's Chi-Square was used to compare the ADR between those who attended when invited and those who self-referred. Of the 15,387 adults eligible to receive a reminder, 13,626 (88.6%) were sent a reminder as intended (1,761 were not sent a reminder, due to endoscopy capacity). Of these, 8.0% (n = 1,086) booked and attended an appointment, which equated to a 4.1% increase in uptake from 41.6% at baseline, to 45.7% at follow-up. The ADR was significantly higher for those who self-referred, compared with those who attended when invited (13.3% and 9.5%, respectively; X 2 = 16.138, p = 0.000059). The implementation of non-participant reminders led to a moderate increase in uptake. Implementing non-participant reminders could help mitigate the negative effects of COVID-19 on uptake.
RESUMEN
Introduction: Colonoscopy is the gold standard test for investigating lower gastrointestinal symptoms and is an important therapeutic tool for colonic polypectomy. This paper is aimed at the general physician and examines the role of colonoscopy in very elderly patients by exploring the particular risks in this population, the yield of colonoscopy and potential alternative investigations. Sources of data: Original research and review articles were identified through selective PubMed searches. Guidelines were identified through interrogation of national and international society websites in addition to PubMed searches. Areas of agreement: Advanced age alone is not a reason to avoid investigation. The decision to perform colonoscopy in this population must take into account indication and yield, risks of the procedure and bowel preparation, physical fitness of the patient, potential alternative and the ability to consent. As a general rule, the principle of 'first doing no harm' should be applied and requires balancing of the risks of the procedure and preparation with the benefits of doing the test. Areas of controversy: There is no defined upper age limit at which colonoscopy is contraindicated, however; the National Health Service Bowel Cancer Screening Programme stops inviting patients for screening and surveillance colonoscopy at age 75. Growing points and areas timely for developing research: The concepts of 'first do no harm' and shared decision-making are not new but are increasingly important, particularly in this patient group. It is crucial to provide patients with information about risks, benefits and alternative investigations to empower their decision-making.
Asunto(s)
Colonoscopía , Detección Precoz del Cáncer/instrumentación , Enfermedades Gastrointestinales/diagnóstico , Adhesión a Directriz , Servicios de Salud para Ancianos , Medición de Riesgo/métodos , Anciano , Anciano de 80 o más Años , Humanos , Guías de Práctica Clínica como AsuntoRESUMEN
AIM: The delivery of the Scottish Bowel Screening Programme (SBoSP) is rooted in the provision of a high quality, effective and participant-centred service. Safe and effective colonoscopy forms an integral part of the process. Additional accreditation as part of a multi-faceted programme for participating colonoscopists, as in England, does not exist in Scotland. This study aimed to describe the quality of colonoscopy in the SBoSP and compare this to the English national screening standards. METHODS: Data were collected from the SBoSP between 2007 and 2014. End-points for analysis were caecal intubation, cancer, polyp and adenoma detection, and complications. Overall results were compared with 2012 published English national standards for screening and outcomes from 2006 to 2009. RESULTS: During the study period 53 332 participants attended for colonoscopy. The colonoscopy completion rate was 95.6% overall. The mean cancer detection rate was 7.1%, the polyp detection rate was 45.7% and the adenoma detection rate was 35.5%. The overall complication rate was 0.47%. CONCLUSION: Colonoscopy quality in the SBoSP has exceeded the standard set for screening colonoscopy in England, despite not adopting a multi-faceted programme for screening colonoscopy. However, the overall adenoma detection rate in Scotland was 9.1% lower than that in England which has implications for colonoscopy quality and may have an impact on cancer prevention rates, a key aim of the SBoSP.
Asunto(s)
Neoplasias Colorrectales/diagnóstico , Neoplasias Colorrectales/epidemiología , Detección Precoz del Cáncer/métodos , Tamizaje Masivo/organización & administración , Mejoramiento de la Calidad , Anciano , Estudios de Cohortes , Femenino , Humanos , Modelos Lineales , Masculino , Persona de Mediana Edad , Prevalencia , Desarrollo de Programa , Evaluación de Programas y Proyectos de Salud , Estudios Retrospectivos , Medición de Riesgo , EscociaRESUMEN
Emotion characterises learners' feedback experiences. While the failure-to-fail literature suggests that emotion may be important, little is known about the role of emotion for educators. Secondary analyses were therefore conducted on data exploring 110 trainers' and trainees' feedback experiences. Group and individual narrative interviews were conducted across three UK sites. We analysed 333 narratives for emotional talk using textual analysis: Linguistic Inquiry and Word Count. Furthermore, thematic framework analysis was conducted on the trainer narratives to explore aspects of feedback processes that are emotional. An additional in-depth little 'd' discourse analysis was conducted on selected trainer narratives to enable us to explore the complex relationship between the whats (reported events) and the hows (emotional talk). Trainer narratives did not differ significantly in positive or negative emotional talk from trainee narratives. By exploring the interplay of the whats and the hows, several aspects of feedback processes were identified as potentially emotional for trainers including trainers being concerned about upsetting learners and worried about patient safety. This was illustrated through numerous linguistic devices to establish emotional tone such as metaphoric talk and laughter. These findings suggest that feedback processes can be emotional for trainers. It highlights the need to better understand the 'filter' of emotion for trainers but also to better understand how emotion plays a role in feedback as a complex social process.
Asunto(s)
Actitud del Personal de Salud , Educación de Postgrado en Medicina/métodos , Emociones , Retroalimentación , Narración , Estudiantes de Medicina/psicología , Lugar de Trabajo/psicología , Adulto , Femenino , Humanos , Masculino , Investigación CualitativaRESUMEN
Feedback in medical education is complicated by the multiple contexts within which learning occurs. However, feedback research in medical education has typically focused on information provided by tutors to students with limited exploration of the influence of context. This research seeks to address this gap by exploring the influence of multiple contexts upon feedback processes. Employing video-ethnography methodology we explored feedback in two common contexts for medical student learning: the simulated clinical environment and the medical workplace. Learning and teaching sessions were filmed in each of these contexts, capturing diverse feedback processes. Data were analysed for key themes using a Framework Analysis approach and similarities and differences between the two contexts identified. In total 239 distinct feedback episodes across 28 different teaching and learning sessions were captured, with feedback processes relating to the patient, practice, educational and institutional contexts observed. In this paper, we concentrate on key similarities and differences in feedback processes between the two contexts with respect to six themes: feedback interlocutors, interlocutor positioning, feedback types, feedback foci, feedback styles and feedback milieu. We argue that feedback is inextricably linked to the multiple contexts in which feedback is enacted. It is only by exploring these contextual influences that feedback can be understood more fully. With such understanding we should be better placed to develop interventions capable of improving the long elusive experience of successful feedback.
Asunto(s)
Educación de Pregrado en Medicina/métodos , Retroalimentación Formativa , Estudiantes de Medicina/psicología , Grabación en Video , Adolescente , Adulto , Antropología Cultural , Femenino , Humanos , Masculino , Persona de Mediana Edad , Facultades de Medicina , Adulto JovenRESUMEN
Serrated polyps have been recognised in the last decade as important premalignant lesions accounting for between 15% and 30% of colorectal cancers. There is therefore a clinical need for guidance on how to manage these lesions; however, the evidence base is limited. A working group was commission by the British Society of Gastroenterology (BSG) Endoscopy section to review the available evidence and develop a position statement to provide clinical guidance until the evidence becomes available to support a formal guideline. The scope of the position statement was wide-ranging and included: evidence that serrated lesions have premalignant potential; detection and resection of serrated lesions; surveillance strategies after detection of serrated lesions; special situations-serrated polyposis syndrome (including surgery) and serrated lesions in colitis; education, audit and benchmarks and research questions. Statements on these issues were proposed where the evidence was deemed sufficient, and re-evaluated modified via a Delphi process until >80% agreement was reached. The Grading of Recommendations, Assessment, Development and Evaluations (GRADE) tool was used to assess the strength of evidence and strength of recommendation for finalised statements. Key recommendation: we suggest that until further evidence on the efficacy or otherwise of surveillance are published, patients with sessile serrated lesions (SSLs) that appear associated with a higher risk of future neoplasia or colorectal cancer (SSLs ≥10â mm or serrated lesions harbouring dysplasia including traditional serrated adenomas) should be offered a one-off colonoscopic surveillance examination at 3â years (weak recommendation, low quality evidence, 90% agreement).
Asunto(s)
Humanos , Pólipos del Colon/diagnóstico , Colitis/diagnóstico , Poliposis Intestinal/diagnóstico , Parasimpatolíticos/uso terapéutico , Lesiones Precancerosas/diagnóstico , Biomarcadores/análisis , Colonoscopía , Heces/químicaRESUMEN
Neurons are often classified by their morphological and molecular properties. The online knowledge base Hippocampome.org primarily defines neuron types from the rodent hippocampal formation based on their main neurotransmitter (glutamate or GABA) and the spatial distributions of their axons and dendrites. For each neuron type, this open-access resource reports any and all published information regarding the presence or absence of known molecular markers, including calcium-binding proteins, neuropeptides, receptors, channels, transcription factors, and other molecules of biomedical relevance. The resulting chemical profile is relatively sparse: even for the best studied neuron types, the expression or lack thereof of fewer than 70 molecules has been firmly established to date. The mouse genome-wide in situ hybridization mapping of the Allen Brain Atlas provides a wealth of data that, when appropriately analyzed, can substantially augment the molecular marker knowledge in Hippocampome.org. Here we focus on the principal cell layers of dentate gyrus (DG), CA3, CA2, and CA1, which together contain approximately 90% of hippocampal neurons. These four anatomical parcels are densely packed with somata of mostly excitatory projection neurons. Thus, gene expression data for those layers can be justifiably linked to the respective principal neuron types: granule cells in DG and pyramidal cells in CA3, CA2, and CA1. In order to enable consistent interpretation across genes and regions, we screened the whole-genome dataset against known molecular markers of those neuron types. The resulting threshold values allow over 6000 very-high confidence (>99.5%) expressed/not-expressed assignments, expanding the biochemical information content of Hippocampome.org more than five-fold. Many of these newly identified molecular markers are potential pharmacological targets for major neurological and psychiatric conditions. Furthermore, our approach yields reasonable expression/non-expression estimates for every single gene in each of these four neuron types with >90% average confidence, providing a considerably complete genetic characterization of hippocampal principal neurons.
Asunto(s)
Neuronas , Animales , Ácido Glutámico , Hipocampo , RatonesRESUMEN
OBJECTIVE: The role of serrated polyps (SPs) as colorectal cancer precursor is increasingly recognised. However, the true prevalence SPs is largely unknown. We aimed to evaluate the detection rate of SPs subtypes as well as serrated polyposis syndrome (SPS) among European screening cohorts. METHODS: Prospectively collected screening cohorts of ≥1000 individuals were eligible for inclusion. Colonoscopies performed before 2009 and/or in individuals aged below 50 were excluded. Rate of SPs was assessed, categorised for histology, location and size. Age-sex-standardised number needed to screen (NNS) to detect SPs were calculated. Rate of SPS was assessed in cohorts with known colonoscopy follow-up data. Clinically relevant SPs (regarded as a separate entity) were defined as SPs ≥10â mm and/or SPs >5â mm in the proximal colon. RESULTS: Three faecal occult blood test (FOBT) screening cohorts and two primary colonoscopy screening cohorts (range 1.426-205.949 individuals) were included. Rate of SPs ranged between 15.1% and 27.2% (median 19.5%), of sessile serrated polyps between 2.2% and 4.8% (median 3.3%) and of clinically relevant SPs between 2.1% and 7.8% (median 4.6%). Rate of SPs was similar in FOBT-based cohorts as in colonoscopy screening cohorts. No apparent association between the rate of SP and gender or age was shown. Rate of SPS ranged from 0% to 0.5%, which increased to 0.4% to 0.8% after follow-up colonoscopy. CONCLUSIONS: The detection rate of SPs is variable among screening cohorts, and standards for reporting, detection and histopathological assessment should be established. The median rate, as found in this study, may contribute to define uniform minimum standards for males and females between 50 and 75â years of age.
Asunto(s)
Poliposis Adenomatosa del Colon/diagnóstico , Poliposis Adenomatosa del Colon/epidemiología , Pólipos del Colon/diagnóstico , Pólipos del Colon/epidemiología , Adenoma/diagnóstico , Adenoma/epidemiología , Anciano , Colonoscopía , Neoplasias Colorrectales/diagnóstico , Neoplasias Colorrectales/epidemiología , Estudios Transversales , Detección Precoz del Cáncer , Europa (Continente)/epidemiología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Sangre Oculta , Lesiones Precancerosas/diagnóstico , Lesiones Precancerosas/epidemiología , Estudios RetrospectivosRESUMEN
AIMS: The purpose of this study was to identify the volatile molecules produced by the pathogenic Gram-negative bacterium Klebsiella pneumoniae (ATCC 13883) during in vitro growth using comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry (GC×GC-TOFMS). METHODS AND RESULTS: Klebsiella pneumoniae ATCC 13883 was incubated in lysogeny broth to mid-exponential and stationary growth phases. Headspace volatile molecules from culture supernatants were concentrated using solid-phase microextraction (SPME) and analysed via GC×GC-TOFMS. Ninety-two K. pneumoniae-associated volatile molecules were detected, of which 78 (85%) were detected at both phases of growth and 14 (15%) were detected at either mid-exponential or stationary growth phases. CONCLUSIONS: This study has increased the total number of reported K. pneumoniae-associated volatile molecules from 77 to 150, demonstrating the sensitivity and resolution achieved by employing GC×GC-TOFMS for the analysis of bacterial headspace volatiles. SIGNIFICANCE AND IMPACT OF THE STUDY: This study represents an early-stage comprehensive volatile metabolomic analysis of an opportunistic bacterial pathogen. Characterizing the volatile molecules produced by K. pneumoniae during in vitro growth could provide us with a better understanding of this organisms' metabolism, an area that has not been extensively studied to date.