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2.
J Rheumatol ; 2024 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-38428959

RESUMEN

OBJECTIVE: There are complex and interrelated factors that lead to inequitable healthcare delivery in Canada. Many of the factors that underlie these inequities for Canada's geographically dispersed Indigenous Peoples remain underexamined. METHODS: A cohort of 831 First Nations (FN) individuals from urban and remote communities were recruited into a longitudinal study of rheumatoid arthritis (RA) risk from 2005-2017. Data from each participant's initial enrollment visit was assessed using a survey that captured concerns with health care access. RESULTS: We found that remote participants with RA reported poor access compared to remote First-Degree Relatives (FDR, p<0.001), this difference was not observed for urban RA participants. We observed substantial differences based on sex; Females perceived access to care to be more difficult than males in both urban and remote cohorts (p<0.001). We also observed that male participants with RA reported poor access to care compared to male FDR. Importantly, access to care in remote communities appeared to improve over the duration of the study (p=0.01). In a logistic regression analysis, female sex, remote location, and older age were independent predictors of poor access to care. Predictors of poor access in participants with RA were also female sex, remote location and older age. CONCLUSION: FN peoples living in remote communities, particularly those with an established RA diagnosis, report more problems accessing healthcare. Sex-based inequities exist, with FN females reporting greater difficulties in accessing appropriate healthcare, irrespective of RA diagnosis. Addressing these sex-based inequities should be a high priority for improving healthcare delivery.

3.
J Surg Educ ; 80(10): 1395-1402, 2023 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-37567800

RESUMEN

INTRODUCTION: Core Surgical Training (CST) programs are associated with high burnout. This study aimed to assess the influence of Enhanced Stress Resilience Training (ESRT) over a 2-year period in a single UK Statutory Education Body. METHOD: CSTs participated in 5-weeks of formal ESRT to address work stressors. The primary outcome measure was career progression related to curriculum metrics and National Training Number (NTN) appointment. Secondary measures related to burnout using validated psychological inventories. RESULTS: Of 42 CSTs, 13 engaged fully with ESRT (31.0%; male 8, female 5, median age 28 year.), 11 engaged partially, and 18 did not. ESRT engagement was associated with better NTN appointment (ESRT 8/13 (61.5%) vs. not 1/18 (5.6%), p = 0.025), less burnout [aMBI; mean 5.14 (SD ± 2.35) vs. 3.14 (±2.25), F 6.637, p = 0.002, ηp2=0.167], less stress [PSS-10; 19.22 (±5.91) vs. 15.79 (±5.47), F 8.740, p < 0.001, ηp2=0.200], but more mindfulness [CAMS-R; 19.22 (±5.91) vs. 20.57 (±2.93), F 3.201, p = 0.047, ηp2=0.084]. On multivariable analysis, Improving Surgical Training (run-through CST) program (OR 5.2 (95% CI 1.42-28.41, p = 0.022), MRCS pass (OR 17.128 (95% CI 1.48-197.11, p = 0.023) and ESRT engagement (OR 13.249, 95% CI 2.08-84.58, p = 0.006) were independently associated with NTN success. DISCUSSION: ESRT was associated with less stress and burnout, better mindfulness, and most importantly 13-fold better career progression.

4.
Microsc Microanal ; 29(Supplement_1): 334-335, 2023 Jul 22.
Artículo en Inglés | MEDLINE | ID: mdl-37613590
5.
Int J Surg ; 109(8): 2359-2364, 2023 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-37222671

RESUMEN

BACKGROUND: This study aimed to evaluate core surgical training (CST) differential attainment related to coronavirus disease 2019 (COVID-19), gender and ethnicity. The hypothesis was that COVID-19 adversely influenced CST outcomes. METHODS: A retrospective cohort study of 271 anonymised CST records was undertaken at a UK Statutory Education Body. Primary effect measures were Annual Review of Competency Progression Outcome (ARCPO), Membership of the Royal College of Surgeons (MRCS) examination pass and Higher Surgical Training National Training Number (NTN) appointment. Data were collected prospectively at ARCP and analysed with non-parametric statistical methods in SPSS. RESULTS: CSTs numbering 138 completed training pre-COVID and 133 peri-COVID. ARCPO 1, 2 and 6 were 71.9% pre-COVID versus 74.4% peri-COVID ( P =0.844). MRCS pass rates were 69.6% pre-COVID versus 71.1% peri-COVID ( P =0.968), but NTN appointment rates diminished (pre-COVID 47.4% vs. peri-COVID 36.9%, P =0.324); none of the above varied by gender or ethnicity. Multivariable analyses by three models revealed: ARCPO was associated with gender [m:f 1:0.87, odds ratio (OR) 0.53, P =0.043] and CST theme (Plastics vs. General OR 16.82, P =0.007); MRCS pass with theme (Plastics vs. General OR 8.97, P =0.004); NTN with the Improving Surgical Training run-through programme (OR 5.00, P <0.001). Programme retention improved peri-COVID (OR 0.20, P =0.014) with pan University Hospital rotations performing better than Mixed or District General-only rotations (OR 6.63, P =0.018). CONCLUSION: Differential attainment profiles varied 17-fold, yet COVID-19 did not influence ARCPO or MRCS pass rates. NTN appointment fell by one-fifth peri-COVID, but overall training outcome metrics remained robust despite the existential threat.


Asunto(s)
COVID-19 , Cirujanos , Humanos , Estudios Retrospectivos , Competencia Clínica , COVID-19/epidemiología , Cirujanos/educación , Evaluación Educacional , Reino Unido/epidemiología
6.
Rheumatology (Oxford) ; 62(8): 2646-2651, 2023 08 01.
Artículo en Inglés | MEDLINE | ID: mdl-36805625

RESUMEN

OBJECTIVE: In 2020, the Canadian Vasculitis Research Network (CanVasc) published their updated recommendations for the management of ANCA-associated vasculitides (AAV). The current addendum provides further recommendations regarding the use of avacopan in AAV based on a review of newly available evidence. METHODS: An updated systematic literature review on avacopan (formerly, CCX168) using Medline, Embase, and the Cochrane Library was performed for publications up to September 2022. New recommendations were developed and categorized according to the EULAR grading levels, as done for previous CanVasc recommendations. A modified Delphi procedure and videoconferences were used to reach ≥80% consensus on the inclusion, wording and grading of each recommendation. RESULTS: Three new recommendations were developed. They focus on avacopan therapy indication and duration, as well as timely glucocorticoid tapering. CONCLUSION: These 2022 addended recommendations provide rheumatologists, nephrologists and other specialists caring for patients with AAV with guidance for the use of avacopan, based on current evidence and consensus from Canadian experts.


Asunto(s)
Vasculitis Asociada a Anticuerpos Citoplasmáticos Antineutrófilos , Granulomatosis con Poliangitis , Poliangitis Microscópica , Humanos , Consenso , Canadá , Vasculitis Asociada a Anticuerpos Citoplasmáticos Antineutrófilos/tratamiento farmacológico , Citoplasma , Anticuerpos Anticitoplasma de Neutrófilos
7.
Int J Circumpolar Health ; 82(1): 2166447, 2023 12.
Artículo en Inglés | MEDLINE | ID: mdl-36642913

RESUMEN

Advances in rheumatoid arthritis (RA) management have significantly improved clinical outcomes of this disease; however, some Indigenous North Americans (INA) with RA have not achieved the high rates of treatment success observed in other populations. We review factors contributing to poor long-term outcomes for INA with RA. We conducted a narrative review of studies evaluating RA in INA supplemented with regional administrative health and clinical cohort data on clinical outcomes and health care utilisation. We discuss factors related to conducting research in INA populations including studies of RA prevention. NA with RA have a high burden of genetic and environmental predisposing risk factors that may impact disease phenotype, delayed or limited access to rheumatology care and advanced therapy. These factors may contribute to the observed increased rates of persistent synovitis, premature end-stage joint damage and mortality. Novel models of care delivery that are culturally sensitive and address challenges associated with providing speciality care to patients residing in remote communities with limited accessibility are needed. Progress in establishing respectful research partnerships with INA communities has created a foundation for ongoing initiatives to address care gaps including those aimed at RA prevention. This review highlights some of the challenges of diagnosing, treating, and ultimately perhaps preventing, RA in INA populations.


Asunto(s)
Artritis Reumatoide , Humanos , Artritis Reumatoide/diagnóstico , Artritis Reumatoide/tratamiento farmacológico , Estudios Longitudinales , Grupos de Población , Pueblos Indígenas , América del Norte
8.
Endosc Int Open ; 10(9): E1218-E1224, 2022 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-36118643

RESUMEN

Background and study aims Virtual reality endoscopic simulation training has the potential to expedite competency development in novice trainees. However, simulation platforms must be realistic and confer face validity. This study aimed to determine the face validity of high-fidelity virtual reality simulation (EndoSim, Surgical Science, Gothenburg), and establish benchmark metrics to guide the development of a Simulation Pathway to Improve Competency in Endoscopy (SPICE). Methods A pilot cohort of four experts rated simulated exercises (Likert scale score 1-5) and following iterative development, 10 experts completed 13 simulator-based endoscopy exercises amounting to 859 total metric values. Results Expert metric performance demonstrated equivalence ( P  = 0.992). In contrast, face validity of each exercise varied among experts (median 4 (interquartile range [IQR] 3-5), P  < 0.003) with Mucosal Examination receiving the highest scores (median 5 [IQR 4.5-5], P  = 1.000) and Loop Management and Intubation exercises receiving the lowest scores (median 3 [IQR 1-3], P  < 0.001, P  = 0.004), respectively. The provisional validated SPICE comprised 13 exercises with pass marks and allowance buffers defined by median and IQR expert performance. Conclusions EndoSim Face Validity was very good related to early scope handling skills, but more advanced competencies and translation of acquired clinical skills require further research within an established training program. The existing training deficit with superadded adverse effects of the COVID pandemic make this initiative an urgent priority.

9.
Postgrad Med J ; 98(1158): 252-257, 2022 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-33563714

RESUMEN

OBJECTIVES: To compare proportional representation of healthcare specialty workers, in receipt of New Year Honours (NYHs) and examine system bias. DESIGN: Observational study of UK honours system including comparative analysis of proportional representation of the UK medical workforce. PARTICIPANTS: Recipients of NYHs from 2010 to 2019. MAIN OUTCOME MEASURES: Absolute risk of receiving an NYH, related to medical specialty, gender and geographical region. Relative risk (RR) of receiving an NYH for services to healthcare related to specialty. RESULTS: 11 207 NYHs were bestowed, with 368 (3.3%) awarded to healthcare professionals: 212 (57.6%) women, 156 (42.4%) men. The RR of a healthcare professional receiving an NYH was 0.76 (95% CI 0.68 to 0.84, p<0.001) when compared with the remaining UK workforce. Doctors received most NYHs (n=181), with public health, clinical oncology and general medicine specialties most likely to be rewarded (RR 20.35 (95% CI 9.61 to 43.08, p<0.001), 8.43 (95% CI 2.70 to 26.30, p<0.001) and 8.22 (95% CI 6.22 to 10.86, p<0.001)), respectively; anaesthetists received fewest NYHs (RR 0.52 (95% CI 0.13 to 2.10), p=0.305). Men were more likely to receive NYHs than women (OR 0.44, 95% CI 0.36 to 0.54; p<0.001). Two hundred and fifty-four NYHs (69.0%) were bestowed on residents of England (60, 16.3% London), 49 (13.3%) Scotland (p=0.003), 39 (10.6%) Wales (p<0.001) and 26 (7.1%) Northern-Ireland (p<0.001). CONCLUSIONS: Relative risk of receiving an NYH varied over 150-fold by specialty, twofold by gender and threefold by geographical location. Public health physicians are perceived to be the pick of the parade.


Asunto(s)
Distinciones y Premios , Medicina General , Médicos , Femenino , Humanos , Masculino , Riesgo , Recursos Humanos
10.
Postgrad Med J ; 98(1163): 700-704, 2022 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-37062983

RESUMEN

BACKGROUND: A competition ratio (CR) indicates the ratio of total applications for a training post when compared with numbers of specialty posts available. This study aimed to evaluate CRs' influence on National Training Number (NTN) selection in a single UK Statutory Education Body. METHODS: Consecutive core surgical trainees numbering 154 (105 men, 49 women; median years since graduation: four) were studied over a 6-year period. Annual specialty specific CRs were obtained from Health Education England's website, and primary outcome measure was UK NTN appointment. RESULTS: Overall NTN appointment was 45.5%. Median CR was 2.36; range Oral & Maxillofacial Surgery 0.70 (2020) to Neurosurgery 22.0 (2020). Multivariable analysis revealed that NTN success was associated with: CR (OR 0.46, p=0.003), a single scientific publication (OR 6.25, p=0.001), cohort year (2019, OR 12.65, p=0.003) and Universal Annual Review of Competence Progression Outcome 1 (OR 45.24, p<0.001). CRs predicted NTN appointment with a Youden index defined critical ratio of 4.42; 28.6% (n=8) versus 49.2% (n=62), p=0.018. CONCLUSION: CRs displayed 30-fold variation, with CRs below 4.42 associated with twofold better NTN promotion, but strong clinical competence and academic reach again emerged as the principal drivers of career advancement.


Asunto(s)
Neurocirugia , Especialidades Quirúrgicas , Masculino , Humanos , Femenino , Pronóstico , Especialidades Quirúrgicas/educación , Educación de Postgrado en Medicina , Escolaridad , Reino Unido
12.
Physiother Can ; 73(1): 37-46, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-35110822

RESUMEN

Purpose: The purpose of this study was to establish the clinical practice of physiotherapists who treat people with knee osteoarthritis (OA) in Canada and examine their knowledge, awareness, use of, and attitudes toward clinical practice guidelines (CPGs). Method: We conducted a cross-sectional survey of physiotherapists who are licensed to practise in Canada and who treat people with knee OA. Results: A total of 388 physiotherapists completed our survey. Approximately two-thirds of them (271) were aware of CPGs. Out of all CPG recommendations, most respondents provided leg strengthening exercises (380) and education (364). More than 80% believed that CPGs improved patient care and enhanced decision making and were confident in their ability to interpret CPGs. More physiotherapists (204) identified barriers to the use of CPGs than facilitators of their use (117). Physiotherapists who were employed in private practice were substantially more likely to use interventions such as acupuncture (odds ratio [OR] 5.98; 95% CI: 2.92, 12.23; p < 0.01) and joint mobilization and manipulation (OR 6.58; 95% CI: 3.45, 12.55; p < 0.01) than were physiotherapists employed in hospital settings. Conclusions: Two-thirds of respondents were aware of CPGs. Physiotherapists provided education and leg strengthening exercises more often than aerobic exercise and weight management advice. Physiotherapists employed in private practice were more likely to use adjunct interventions.


Objectif : déterminer la pratique clinique des physiothérapeutes qui traitent des personnes atteintes d'arthrose du genou au Canada et examiner leurs connaissances, leur sensibilisation, leur utilisation et leurs attitudes envers les directives cliniques (DC). Méthodologie : sondage transversal auprès des physiothérapeutes autorisés à exercer au Canada et qui traitent des personnes atteintes d'arthrose du genou. Résultats : au total, 388 physiothérapeutes ont rempli le sondage. Environ les deux tiers (271) connaissaient l'existence des DC. Parmi toutes les recommandations des DC, la plupart des répondants donnaient des exercices de renforcement des jambes (380) et de l'information (364). Plus de 80 % étaient d'avis que les DC amélioraient les soins aux patients et la prise de décision et avaient confiance en leur capacité d'interpréter les DC. Un plus grand nombre de physiothérapeutes (204) constatait plus d'obstacles que d'incitations à utiliser les DC (117). Les physiothérapeutes en pratique privée étaient considérablement plus susceptibles de recourir à des interventions comme l'acupuncture (rapport de cotes [RC] 5,98; IC à 95 % : 2,92, 12,23; p < 0,01), les mobilisations et les manipulations articulaires (RC 6,58; IC à 95 % : 3,45, 12,55; p < 0,01) que les physiothérapeutes en milieu hospitalier. Conclusions : les deux tiers des répondants connaissaient l'existence des DC. Les physiothérapeutes fournissaient de l'information et des exercices de renforcement des jambes plus souvent que des exercices aérobiques et des conseils sur la gestion du poids. Ceux qui travaillaient en pratique privée étaient plus susceptibles de recourir à des interventions complémentaires.

13.
BMJ Simul Technol Enhanc Learn ; 7(4): 188-193, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-35516828

RESUMEN

Introduction: Competitive physical performance is routinely monitored by wearable technology (biosensors), yet professional healthcare is not, despite high prevalence of trainee stress and burnout, notwithstanding the corresponding risk to patient safety. This study aimed to document the physiological stress response of UK Core Surgical Trainees (CSTs) during simulation training. Methods: CSTs (n=20, 10 male) were fitted with Vital Scout Wellness Monitors (VivaLNK, Campbell, California, USA) for an intensive 3-day training bootcamp. In addition to physiological parameters, CST demographics, event diaries and Maslach Burnout Inventory scores were recorded prospectively during exposure to three scenarios: interactive lectures, clinical skills simulation and non-technical (communication) training. Results: Baseline heart rate (BHR, 60 bpm (range 39-81 bpm)) and baseline respiratory rate (14/min (11-18/min)) varied considerably and did not correlate (rho 0.076, p=0.772). BHR was associated with weekly exercise performed (66 bpm (<1 hour) vs 43 bpm (>5 hour), rho -0.663, p=0.004). Trainee response (standardised median heart rate vs BHR) revealed heart rate was related proportionately to lectures (71 bpm, p<0.001), non-technical skills training (79 bpm, p<0.001) and clinical skills simulation (88 bpm, p<0.001). Respiratory rate responded similarly (p<0.001 in each case). Heart rate during clinical skills simulation was associated with emotional exhaustion (rho 0.493, p=0.044), but maximum heart rate was unrelated to CSTs' perceived peak stressors. Discussion: Stress response, as derived from positive sympathetic heart rate drive varied over two-fold, with a direct implication on oxygen uptake and energy expenditure, and highlighting the daily physical demands placed upon clinicians.

14.
J Rheumatol ; 48(4): 555-566, 2021 04.
Artículo en Inglés | MEDLINE | ID: mdl-32934123

RESUMEN

OBJECTIVE: In 2015, the Canadian Vasculitis Research Network (CanVasc) created recommendations for the management of antineutrophil cytoplasm antibody (ANCA)-associated vasculitides (AAV) in Canada. The current update aims to revise existing recommendations and create additional recommendations, as needed, based on a review of new available evidence. METHODS: A needs assessment survey of CanVasc members informed questions for an updated systematic literature review (publications spanning May 2014 to September 2019) using Medline, Embase, and Cochrane. New and revised recommendations were developed and categorized according to the level of evidence and strength of each recommendation. The CanVasc working group used a 2-step modified Delphi procedure to reach > 80% consensus on the inclusion, wording, and grading of each new and revised recommendation. RESULTS: Eleven new and 16 revised recommendations were created and 12 original (2015) recommendations were retained. New and revised recommendations are discussed in detail within this document. Five original recommendations were removed, of which 4 were incorporated into the explanatory text. The supplementary material for practical use was revised to reflect the updated recommendations. CONCLUSION: The 2020 updated recommendations provide rheumatologists, nephrologists, and other specialists caring for patients with AAV in Canada with new management guidance, based on current evidence and consensus from Canadian experts.


Asunto(s)
Vasculitis Asociada a Anticuerpos Citoplasmáticos Antineutrófilos , Vasculitis Asociada a Anticuerpos Citoplasmáticos Antineutrófilos/tratamiento farmacológico , Anticuerpos Anticitoplasma de Neutrófilos , Canadá , Consenso , Citoplasma , Humanos
15.
Physiol Rep ; 8(11): e14454, 2020 06.
Artículo en Inglés | MEDLINE | ID: mdl-32489016

RESUMEN

INTRODUCTION: A high prevalence of stress and burnout has been reported among healthcare professionals; however, the current tools utilized to quantify such metrics are not in keeping with doctors' busy lifestyles, and moreover do not comply with infection prevention policies. Given that increased stress can subsequently impact both the healthcare profession and the patient in care, this study aimed to assess the validity of a wearable biosensor to monitor and manage stress experienced by healthcare professionals. METHODS: In all, 12 healthy, male volunteers completed an incremental exercise protocol to volitional exhaustion, which aimed to induce physiological stress in a graded manner. A wearable consumer-grade biosensor (Vital Scout, VivaLNK, Inc.) was used to measure stress, energy expenditure, respiration rate, and activity throughout the exercise protocol. These variables were validated against online breath-by-breath analysis (MedGraphics Ultima Series). RESULTS: When compared against online "gold standard" measurements, the Vital Scout biosensor demonstrated a high level of accuracy to measure energy expenditure (r = .776, p < .001) and respiration rate (r = .744, p < .001). The V˙O2 increase observed during the incremental exercise test was associated with the Vital Scout biosensor's measurement of activity (r = .777, p < .001). In contrast, there was a poor relationship between the changes in V˙O2 and the Vital Scout biosensor's ability to detect stress (r = -.195, p = .013). CONCLUSION: The Vital Scout biosensor provided an accurate assessment of energy expenditure and respiration when compared to the "gold standard" assessment of these parameters. Biosensors have the potential to measure stress and deserve further research in the peri-hospital environment.


Asunto(s)
Técnicas Biosensibles/instrumentación , Técnicas Biosensibles/métodos , Ejercicio Físico/fisiología , Monitoreo Fisiológico/instrumentación , Monitoreo Fisiológico/métodos , Estrés Psicológico/diagnóstico , Adulto , Metabolismo Energético , Personal de Salud , Humanos , Masculino , Frecuencia Respiratoria , Estrés Fisiológico , Dispositivos Electrónicos Vestibles
16.
J Surg Educ ; 77(1): e1-e8, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-31375465

RESUMEN

OBJECTIVE: Burnout among trainee doctors is common with as many as two-thirds reporting poor health. This study aimed to assess burnout in a cohort of UK core and higher general surgical trainees. DESIGN: The Maslach Burnout Inventory for Medical Personnel was distributed to 158 surgical trainees to evaluate emotional exhaustion (EE), depersonalization (DP), and personal accomplishment (PA). High EE (≥27) and DP (≥10), low PA (≤33) scores were taken to indicate burnout. SETTING: A single UK (Wales) Deanery. PARTICIPANTS: One hundred responses were received; 65 core surgical trainees, 31 Higher Surgical Trainees (HST), and 4 not specified. RESULTS: Median EE, DP, and PA scores were 22.0 (range 2-50), 7.5 (0-25), and 36.0 (19-47), respectively. High burnout by domain was: EE (n = 33), DP (n = 39), PA (n = 34), with 59% of trainees demonstrating burnout in ≥1 one domain, with strong interdomain correlation (EE:DP r = 0.351, p < 0.001; EE:PA r = -0.455, p < 0.001; DP:PA r = -0.446, p < 0.001). Female gender (p = 0.020), core surgical training grade (p = 0.012), and being childless (p = 0.033) were independently associated with higher levels of EE; whereas HST grade (p = 0.007), age >30 years (p = 0.010), married/partner status (p = 0.001), and parenthood (p = 0.015), were associated with lower levels of burnout with regard to DP. Binary logistic regression revealed lower burnout in all domains to be associated with HST status (hazard ratio 0.116, 95% confidence interval 0.014-0.980, p = 0.048) and male gender (hazard ratio 4.365, (1.246-15.293), p = 0.021). CONCLUSIONS: Burnout among surgical trainees was common in at least 1 Maslach Burnout Inventory domain. Urgent counter measures are required to protect the health and wellbeing of trainees at risk, which ought to be associated with commensurate improvement in patient safety.


Asunto(s)
Agotamiento Profesional , Médicos , Adulto , Agotamiento Profesional/epidemiología , Agotamiento Psicológico , Femenino , Personal de Salud , Humanos , Masculino , Encuestas y Cuestionarios
17.
Materials (Basel) ; 12(16)2019 Aug 16.
Artículo en Inglés | MEDLINE | ID: mdl-31426387

RESUMEN

Palladium can readily dissociate molecular hydrogen at its surface, and rapidly accept it onto the octahedral sites of its face-centered cubic crystal structure. This can include radioactive tritium. As tritium ß-decays with a half-life of 12.3 years, He-3 is generated in the metal lattice, causing significant degradation of the material. Helium bubble evolution at high concentrations can result in blister formation or exfoliation and must therefore be well understood to predict the longevity of materials that absorb tritium. A hydrogen over-pressure must be applied to palladium hydride to prevent hydrogen from desorbing from the metal, making it difficult to study tritium in palladium by methods that involve vacuum, such as electron microscopy. Recent improvements in in-situ ion implantation Transmission Electron Microscopy (TEM) allow for the direct observation of He bubble nucleation and growth in materials. In this work, we present results from preliminary experiments using the new ion implantation Environmental TEM (ETEM) at the University of Huddersfield to observe He bubble nucleation and growth, in-situ, in palladium at cryogenic temperatures in a hydrogen environment. After the initial nucleation phase, bubble diameter remained constant throughout the implantation, but bubble density increased with implantation time. ß-phase palladium hydride was not observed to form during the experiments, likely indicating that the cryogenic implantation temperature played a dominating role in the bubble nucleation and growth behavior.

18.
J Surg Educ ; 76(6): 1569-1578, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31147300

RESUMEN

INTRODUCTION: Certification of completion of training in Trauma and Orthopedic (T&O) surgery in the UK requires the demonstration of operative competence in 12 index procedures, achieved through attaining a level 4 consultant-validated procedure-based assessment (PBA). The aim of this study was to evaluate the trajectory of operative learning curves related to PBA performance with respect to operative caseload and training time. DESIGN: Logbook data from consecutive 24 higher T&O trainees were compared with PBA evaluations to determine the relationship between PBA level, operative experience, training time, and indicative numbers. Learning curve gradients were calculated using trigonometry related to operative experience and training time. SETTING: A higher surgical orthopedic training program serving a single UK (Wales) Deanery. PARTICIPANTS: Twenty-four consecutive higher T&O surgery trainees. RESULTS: Median caseload to achieve level 4 competences ranged from 9 (interquartile range 6-12) for tension band wiring (olecranon or patella) to 101 (61-127) for arthroscopy, with significant variation between all 12 procedures (p < 0.001). Median number of PBAs to reach level 4 competences was 4 (2-6) with significant variation between procedures (p < 0.001). Median learning curve gradients to achieve level 4 competence for tension band wiring were 68.2° and 33.7° by caseload and training time respectively, compared with 12.2° and 45° for arthroscopy, with significant learning curve variation for all procedures related to caseload between first level 3 and first level 4 PBA (p < 0.001). Competence ratios were <1 (median 0.99, range 0.70-2.53) for 6 of the 12 indicative procedures. CONCLUSIONS: Significant learning curve trajectory variance was observed, with discrepancies between indicative operative numbers and the point at which competence was judged achieved. Numbers of index operations to achieve certification of completion of training warrant further examination.


Asunto(s)
Curriculum , Curva de Aprendizaje , Ortopedia/educación , Traumatología/educación , Certificación , Competencia Clínica , Reino Unido
19.
Arthritis Rheumatol ; 71(9): 1494-1503, 2019 09.
Artículo en Inglés | MEDLINE | ID: mdl-30861615

RESUMEN

OBJECTIVE: To determine the incidence of inflammatory arthritis and autoantibody prevalence in Indigenous North American people. METHODS: Unaffected relatives of Indigenous North Americans with rheumatoid arthritis (RA) from central Canada and Alaska were systematically monitored from 2005 to 2017. Rheumatoid factor (RF) and anti-citrullinated protein antibodies (ACPAs) were tested at every visit, and a subset was tested for ACPA fine specificity using a custom multiplex assay. Multistate models based on all available study visits were developed to determine the likelihood of transitioning between autoantibody states, or to inflammatory arthritis. RESULTS: Eighteen of 374 relatives (4.8%) developed inflammatory arthritis during follow-up (after a mean ± SD of 4.7 ± 2.4 years), yielding a transition rate of 9.2 cases/1,000 person-years. Thirty percent of those who developed inflammatory arthritis were seronegative at baseline, but all were seropositive at inflammatory arthritis onset. Although 30% of ACPA/RF double-seropositive individuals developed inflammatory arthritis (after 3.2 ± 2.2 years), the majority of these individuals did not develop inflammatory arthritis. Multistate modeling indicated a 71% and 68% likelihood of ACPA and RF seropositive states, respectively, reverting to a seronegative state after 5 years, and a 39% likelihood of an ACPA/RF double-seropositive state becoming seronegative. Fine specificity testing demonstrated an expansion of the ACPA repertoire prior to the development of inflammatory arthritis. CONCLUSION: Despite a high incidence of inflammatory arthritis in this cohort of at-risk relatives of Indigenous North Americans with RA, a large proportion of autoantibody-positive individuals do not develop inflammatory arthritis and revert back to an autoantibody-negative state.


Asunto(s)
/estadística & datos numéricos , Artritis Reumatoide/etnología , Artritis Reumatoide/epidemiología , Familia , Indígenas Norteamericanos/estadística & datos numéricos , Adulto , Alaska/epidemiología , Anticuerpos Antiproteína Citrulinada/sangre , Artritis Reumatoide/inmunología , Autoanticuerpos/sangre , Canadá/epidemiología , Femenino , Predisposición Genética a la Enfermedad/epidemiología , Humanos , Incidencia , Estudios Longitudinales , Masculino , Prevalencia , Estudios Prospectivos , Factor Reumatoide/sangre
20.
World J Surg ; 43(4): 967-972, 2019 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-30564922

RESUMEN

BACKGROUND: The Hirsch index, often used to assess research impact, suffers from questionable validity within the context of General Surgery, and consequently adapted bibliometrics and altmetrics have emerged, including the r-index, m-index, g-index and i10-index. This study aimed to assess the relative value of these novel bibliometrics in a single UK Deanery General Surgical Consultant cohort. METHOD: Five indices (h, r, m, g and i10) and altmetric scores (AS) were calculated for 151 general surgical consultants in a UK Deanery. Indices and AS were calculated from publication data via the Scopus search engine with assessment of construct validity and reliability. RESULTS: The median number of publications, h-index, r-index, m-index, g-index and i10-index were 13 (range 0-389), 5 (range 0-63), 5.2 (range 0-64.8), 0.33 (range 0-1.5), 10 (range 0-125) and 4 (range 0-245), respectively. Correlation coefficients of r-index, m-index, g-index and i10-index with h-index were 0.913 (p < 0.001), 0.716 (p < 0.001), 0.961 (p < 0.001) and 0.939 (p < 0.001), respectively. Significant variance was observed when the cohort was ranked by individual bibliometric measures; the median ranking shifts were: r-index - 2 (- 46 to + 23); m-index - 6.5 (- 53 to + 22); g-index - 0.5 (- 24 to + 13); and i10-index 0 (- 8 to + 11), respectively (p < 0.001). The median altmetric score and AS index were 0 (range 0-225.5) and 1 (range 0-10), respectively; AS index correlated strongly with h-index (correlation coefficient 0.390, p < 0.001). CONCLUSIONS: Adapted bibliometric indices appear to be equally valid measures of evaluating academic productivity, impact and reach.


Asunto(s)
Bibliometría , Publicaciones/estadística & datos numéricos , Especialidades Quirúrgicas/estadística & datos numéricos , Consultores , Reproducibilidad de los Resultados
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