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1.
Phys Rev Lett ; 131(7): 075101, 2023 Aug 18.
Artigo em Inglês | MEDLINE | ID: mdl-37656860

RESUMO

The fusion-born alpha particle heating in magnetically confined fusion machines is a high priority subject for studies. The self-heating of thermonuclear fusion plasma by alpha particles was observed in recent deuterium-tritium (D-T) experiments on the joint European torus. This observation was possible by conducting so-called "afterglow" experiments where transient high fusion yield was achieved with neutral beam injection as the only external heating source, and then termination of the heating at peak performance. This allowed the first direct evidence for electron heating of plasmas by fusion-born alphas to be obtained. Interpretive transport modeling of the relevant D-T and reference deuterium discharges is consistent with the alpha particle heating observation.

2.
AIDS Behav ; 27(4): 1140-1153, 2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-36367613

RESUMO

HIV/HCV prevention among people who inject drugs (PWID) is of key public health importance. We aimed to assess the impact of COVID-19 and associated response measures on HIV/HCV prevention services and socio-economic status of PWID in high-HIV-risk sites. Sites with recent (2011-2019) HIV outbreaks among PWID in Europe North America and Israel, that had been previously identified, were contacted early May 2020. Out of 17 sites invited to participate, 13 accepted. Semi-structured qualitative site reports were prepared covering data from March to May 2020, analyzed/coded and confirmed with a structured questionnaire, in which all sites explicitly responded to all 103 issues reported in the qualitative reports. Opioid maintenance treatment, needle/syringe programs and antiretroviral treatment /hepatitis C treatment continued, but with important reductions and operational changes. Increases in overdoses, widespread difficulties with food and hygiene needs, disruptions in drug supply, and increased homelessness were reported. Service programs rapidly reformed long established, and politically entrenched, restrictive service delivery policies. Future epidemic control measures should include mitigation of negative side-effects on service provision and socio-economic determinants in PWID.


RESUMEN: La prevención del VIH/VHC entre las personas que se inyectan drogas (PWID) es de vital importancia para la salud pública. Nuestro objetivo fue evaluar el impacto de COVID-19 y las medidas de respuesta asociadas en los servicios de prevención del VIH/VHC y el estado socioeconómico de las PWID en sitios de alto riesgo de VIH. Se contactó con sitios con brotes recientes (2011­2019) de VIH entre PWID en Europa, América del Norte e Israel, que habían sido previamente identificados, a principios de mayo de 2020. De los 17 sitios invitados a participar, 13 aceptaron. Se prepararon informes cualitativos semiestructurados del sitio que cubrían los datos de marzo a mayo de 2020, analizados/codificados y confirmados con un cuestionario estructurado, en el que todos los sitios respondieron explícitamente a los 103 asuntos reportados en los informes cualitativos. El tratamiento de mantenimiento con opiáceos, los programas de agujas/jeringas y el tratamiento antirretroviral/tratamiento de la hepatitis C continuaron, pero con importantes reducciones y cambios operativos. Se reportaron aumentos en las sobredosis, dificultades generalizadas con las necesidades alimentarias y de higiene, interrupciones en el suministro de medicamentos y aumento de personas sin hogar. Los programas de servicios reformaron rápidamente las políticas restrictivas de prestación de servicios, establecidas desde hace mucho tiempo y políticamente arraigadas. Las futuras medidas de control de epidemias deben incluir la mitigación de los efectos secundarios negativos en la prestación de servicios y los determinantes socioeconómicos en las PWID.


Assuntos
COVID-19 , Usuários de Drogas , Infecções por HIV , Hepatite C , Abuso de Substâncias por Via Intravenosa , Humanos , Abuso de Substâncias por Via Intravenosa/complicações , Abuso de Substâncias por Via Intravenosa/epidemiologia , Infecções por HIV/epidemiologia , Infecções por HIV/prevenção & controle , Preparações Farmacêuticas , Israel/epidemiologia , Determinantes Sociais da Saúde , COVID-19/epidemiologia , COVID-19/prevenção & controle , Hepatite C/epidemiologia , Hepatite C/prevenção & controle , Hepacivirus , Surtos de Doenças/prevenção & controle , Europa (Continente)/epidemiologia
3.
Artigo em Inglês | MEDLINE | ID: mdl-36100122

RESUMO

Physiological condition can affect survival and reproductive success in seabirds. However, seabirds rarely show outward signs of poor physiological condition, making it difficult to identify and address issues before they result in population level impacts. We investigate physiological condition of breeding northern gannets (Morus bassanus) between years and nesting stages. Blood smears were used to quantify blood cell profiles indicative of chronic stress, infection, disease, and immunocompetence. No blood parasites were observed, but elevated Heterophil to Lymphocyte (H:L) ratios, eosinophils, and monocytes suggest higher prevalence of infection in some years. Chronic stress levels, indicated by high H:L ratio, were elevated in incubation and early chick-rearing compared to late chick-rearing, which coincided with poorer body condition in breeding birds. This study highlights the value of haematology as a tool for identifying changing patterns of health that may serve as an early indicator of breeding failure, overwintering mortality, and population declines.


Assuntos
Morus , Animais , Aves/fisiologia , Melhoramento Vegetal , Reprodução
4.
J Public Health (Oxf) ; 42(3): 588-593, 2020 08 18.
Artigo em Inglês | MEDLINE | ID: mdl-30811538

RESUMO

BACKGROUND: There is little information on the effectiveness of introducing age restriction legislation alone to reduce the rate of sunbed usage by teenagers. Prior to the Public Health (Sunbed) Act of 2014 prohibiting the use of sunbeds in under 18-year-olds in Ireland we reported the rate of sunbed use at 7.5%. OBJECTIVES: The aim of the study was to compare the rate of sunbed usage among Irish teenagers before and after the introduction of banning legislation to determine if it had the desired effect of reducing its rate of use. METHODS: In a cross-sectional survey, students from the same schools as in our previous study completed an anonymous, written questionnaire pertaining to sunbed usage. RESULTS: In total, 783 questionnaires, from 13 schools across Ireland, were completed. The rate of sunbed use in the current study was 7.2%, compared to 7.5% in the pre-ban study, (P = 0.76). A higher rate of sunbed use was observed in Dublin schools and female public students. CONCLUSION: Our study suggests that legislation alone is ineffective at reducing sunbed usage in a teenage population. A multifaceted approach is required that includes enforcement of the legislation together with targeted public education and awareness campaigns using all aspects of the media.


Assuntos
Banho de Sol , Adolescente , Estudos Transversais , Feminino , Humanos , Irlanda , Instituições Acadêmicas , Inquéritos e Questionários
5.
Int Nurs Rev ; 67(4): 554-559, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-33006173

RESUMO

AIM: To argue that nurse practitioners have been under-utilized generally in the current global health environment, creating barriers to achieving universal health coverage and the Sustainable Development Goals. BACKGROUND: Nurse practitioners are advanced practice nurses possessing expert knowledge and leadership skills that can be optimized to narrow disparities and ensure access to high-quality health care globally. Nurses worldwide have been challenged to meet global public health needs in the context of COVID-19 (SARS-CoV-2 virus), and there are early indications that nurse practitioners are being called upon to the full extent of their capabilities in the current pandemic. SOURCES OF EVIDENCE: PubMed; Google Scholar; the International Council of Nurses; World Health Organization; United Nations; and the experiences of the authors. DISCUSSION: Several international reports, nursing and health organizations have called for continued investment in and development of nursing to improve mechanisms that promote cost-effective and universally accessible care. Expanding nurse practitioner scopes of practice across nations will leverage their clinical capacities, policy and advocacy skills, and talents to lead at all levels. CONCLUSION: Ongoing empirical data and policy change is needed to enable the full scope and strategic utilization of nurse practitioners across healthcare systems and contexts. IMPLICATIONS FOR NURSING PRACTICE, AND NURSING AND HEALTH POLICY: Widespread education regarding nurse practitioner capacities for interdisciplinary partners, policymakers and the public is needed. Policies that safely expand their roles are critical. Role titles and remuneration reflective of their scope and service are required to lead, sustain and grow the workforce internationally.


Assuntos
COVID-19/epidemiologia , Medicina Baseada em Evidências , Saúde Global , Liderança , Profissionais de Enfermagem/organização & administração , Papel do Profissional de Enfermagem , Prática Avançada de Enfermagem/organização & administração , COVID-19/enfermagem , Humanos , Enfermeiros Clínicos/organização & administração , Pesquisa em Avaliação de Enfermagem , Guias de Prática Clínica como Assunto
6.
HIV Med ; 20(2): 157-163, 2019 02.
Artigo em Inglês | MEDLINE | ID: mdl-30457205

RESUMO

OBJECTIVES: HIV disproportionately affects men who have sex with men (MSM) in Ireland. The aim of this study was to improve understanding of HIV testing among MSM living in Ireland to inform prevention and testing initiatives. METHODS: We used data from the MSM Internet Survey Ireland 2015 (MISI 2015), a cross-sectional survey of MSM living in Ireland. We identified factors associated with never having tested for HIV using univariable and multivariable logistic regression. We identified preferred sites for future tests and examined the relationships between unmet HIV testing needs and socio-demographic groups. RESULTS: More than one-third (n = 1006; 36%) of MSM had never tested for HIV. Multivariable logistic regression showed that untested men were more likely to be aged 18-24 years, live outside Dublin, have a lower level of education, be born in Ireland, identify as bisexual, be out to fewer people, and not have had sex with a man in the previous 12 months. The same groups of men also had the least knowledge about HIV and were least confident in accessing an HIV test. Men who had never tested for HIV were more likely to prefer testing by their general practitioner (GP) or using home sampling HIV kits and less likely to prefer testing in a sexual health clinic. CONCLUSIONS: HIV prevention and testing programmes for MSM should be targeted towards younger men, those living outside Dublin and those with lower levels of education. We recommend increased promotion and availability of free HIV testing services in a range of clinical and nonclinical settings (including self-sampling and home testing).


Assuntos
Infecções por HIV/diagnóstico , Disparidades em Assistência à Saúde/estatística & dados numéricos , Homossexualidade Masculina/estatística & dados numéricos , Adulto , Fatores Etários , Estudos Transversais , Promoção da Saúde , Humanos , Internet , Irlanda/epidemiologia , Modelos Logísticos , Masculino , Programas de Rastreamento , Pessoa de Meia-Idade , Medição de Risco , Inquéritos e Questionários , Adulto Jovem
7.
Stat Med ; 38(8): 1459-1474, 2019 04 15.
Artigo em Inglês | MEDLINE | ID: mdl-30511500

RESUMO

One Sentence Summary: A Bayesian repeated measures model based on quantitative muscle strength data from a prospective Natural History Study was developed to determine disease progression and design clinical trials for GNE myopathy, a rare and slowly progressive muscle disease. GNE myopathy is a rare muscle disease characterized by slowly progressive weakness and atrophy of skeletal muscles. To address the significant challenges of defining the natural history and designing clinical trials for GNE myopathy, we developed a Bayesian latent variable repeated measures model to determine disease progression. The model is based on longitudinal quantitative muscle strength data collected as part of a prospective Natural History Study. The GNE Myopathy Progression Model provides an understanding of disease progression that would have otherwise required a natural history of unfeasible duration. "Disease age," the model-generated measure of disease progression, highly correlates with a variety of clinical, functional and patient-reported outcomes. With the incorporation of a treatment effect parameter to the GNE Disease Progression Model, we describe a novel GNE Myopathy Disease Modification Analysis that significantly increases power and reduces the number of subjects required to test the effectiveness of novel therapies when compared to more traditional analysis methods. The GNE Myopathy Disease Progression Model and Disease Modification Analysis can be applied to muscle diseases with prospectively collected muscle strength data, and a variety of rare and slowly progressive diseases.


Assuntos
Teorema de Bayes , Progressão da Doença , Miopatias Distais/fisiopatologia , Algoritmos , Humanos , Estudos Prospectivos
8.
Med J Malaysia ; 74(4): 300-306, 2019 08.
Artigo em Inglês | MEDLINE | ID: mdl-31424037

RESUMO

INTRODUCTION: Trauma is a Global threat and the 5th highest cause of all-cause mortality in Malaysia caused predominantly due to road traffic accidents. Majority of trauma victims are young adults aged between 21-40 years old. In Malaysia, 24 out of 100,000 population die annually due to trauma, rating us amongst the highest in South East Asia. These alarming figures justify aggressive preventive and mitigation strategies. The aim of this paper is to promote the implementation of evidence-based interventions that will reduce the rate of preventable death because of trauma. Tranexamic acid is one of the few interventions in the early management of severe trauma with level-one evidence. Tranexamic acid has been proven to reduce all causes of mortality and mortality due to bleeding. Evidence proves that it is most effective when administered early, particularly within the 1st hour of trauma. This proposed guideline is formulated based upon quality evidence from multicentre studies, clinical practices in other countries and consideration of the local demographic factors with the intent of enabling an easy and simple pathway to administer tranexamic acid early in the care of the severely injured. CONCLUSION: The guideline highlights select pre-hospital criteria's and the methods for drug administration. The authors recognise that some variants may be present amongst certain institutions necessitating minor adaptations, nevertheless the core principles of advocating tranexamic acid early in the course of pre-hospital trauma should be adhered to.


Assuntos
Antifibrinolíticos/administração & dosagem , Serviços Médicos de Emergência/métodos , Hemorragia/tratamento farmacológico , Ácido Tranexâmico/administração & dosagem , Ferimentos e Lesões/complicações , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Ambulâncias , Antifibrinolíticos/uso terapêutico , Criança , Esquema de Medicação , Serviços Médicos de Emergência/normas , Hemorragia/diagnóstico , Hemorragia/etiologia , Humanos , Malásia , Pessoa de Meia-Idade , Ácido Tranexâmico/uso terapêutico , Índices de Gravidade do Trauma , Ferimentos e Lesões/diagnóstico , Adulto Jovem
9.
Vox Sang ; 113(3): 283-289, 2018 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-29392737

RESUMO

INTRODUCTION: Management of major haemorrhage as a result of trauma is particularly challenging when blood is not an option (BNAO). Evidence on therapeutic strategies in this situation is limited. The aim of this study was to evaluate the management and outcomes of patients who identified themselves as Jehovah's Witnesses (who usually refuse blood products) with traumatic haemorrhage at an Australian major trauma centre. METHODS: A retrospective review of patients from The Alfred Trauma Registry was conducted, including patients who were Jehovah's Witnesses presenting between January 2010 and January 2017. We examined demographics, injury characteristics, clinical progress, therapeutic interventions and outcomes at hospital discharge. RESULTS: There were 34 patients meeting inclusion criteria, with 50% suffering major trauma. Anaemia was a clinical problem for 13 (38·2%) patients, with haemoglobin levels reaching a nadir of 69·7 g/l (95% CI: 56·7-82·7) on average 5·1 days (95% CI: 2·5-7·7) post admission. Various strategies were employed to reduce blood loss including six (46·2%) patients receiving tranexamic acid, nine (29·2%) patients receiving oral or intravenous iron and five (38·5%) receiving erythropoietin. Three patients received packed red cells, and two patients received synthetic haemoglobin-based oxygen carriers. CONCLUSIONS: Numerous therapeutic strategies were employed inconsistently in this unique population of patients. Augmenting circulatory volume with an oxygen carrier acceptable to JW patients presents a novel approach to be considered in adjunct to other strategies. An international resource centre would assist clinicians faced with anaemia and BNAO.


Assuntos
Anemia/tratamento farmacológico , Transfusão de Sangue/psicologia , Hemorragia/tratamento farmacológico , Testemunhas de Jeová , Recusa do Paciente ao Tratamento , Anemia/etiologia , Austrália , Eritropoetina/uso terapêutico , Feminino , Hemorragia/terapia , Humanos , Masculino , Pessoa de Meia-Idade , Ácido Tranexâmico/uso terapêutico
10.
Int J Dent Hyg ; 16(1): 114-124, 2018 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-28636289

RESUMO

OBJECTIVES: The dental hygiene profession in the U.S. is in the process of establishing a direct access model of care and contributing to the creation of the profession of a dental therapist. The objectives were to analyse the professional role perceptions of dental hygiene students and registered dental hygienists in these times of change. Specifically, it was explored whether dental hygiene students' current professional identities differ (i) from their expected future identities, and (ii) from dental hygienists' current and (iii) past identities. METHODS: Survey data were collected from 215 dental hygiene students concerning their present and future role perceptions, and from 352 registered dental hygienists concerning their present and past professional identity perceptions. RESULTS: Students' future professional identity perceptions were even more positive than their very positive current perceptions of their professional role components. Students' current perceptions of professional pride, professional ambition, work ethic and patient relations were more positive than dental hygienists' current perceptions of these professional role components. A comparison of students' current perceptions with dental hygienists' current and retrospective descriptions showed that students were more positive than dental hygienists in each case. CONCLUSIONS: The fact that dental hygienists had less positive role perceptions than dental hygiene students might lead to the conclusion that a loss of idealism occurs over the course of a professional lifespan. However, dental hygienists actually improved their role perceptions over time and students' future descriptions were more positive than their current descriptions, supporting the interpretation that realistic optimism dominates professional role perceptions in these times of change.


Assuntos
Atitude do Pessoal de Saúde , Higienistas Dentários/psicologia , Satisfação no Emprego , Papel Profissional , Estudantes de Ciências da Saúde/psicologia , Adulto , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Inquéritos e Questionários , Estados Unidos , Adulto Jovem
11.
Thorax ; 72(11): 971-980, 2017 11.
Artigo em Inglês | MEDLINE | ID: mdl-28082531

RESUMO

RATIONALE: Platelets play an active role in the pathogenesis of acute respiratory distress syndrome (ARDS). Animal and observational studies have shown aspirin's antiplatelet and immunomodulatory effects may be beneficial in ARDS. OBJECTIVE: To test the hypothesis that aspirin reduces inflammation in clinically relevant human models that recapitulate pathophysiological mechanisms implicated in the development of ARDS. METHODS: Healthy volunteers were randomised to receive placebo or aspirin 75  or 1200 mg (1:1:1) for seven days prior to lipopolysaccharide (LPS) inhalation, in a double-blind, placebo-controlled, allocation-concealed study. Bronchoalveolar lavage (BAL) was performed 6 hours after inhaling 50 µg of LPS. The primary outcome measure was BAL IL-8. Secondary outcome measures included markers of alveolar inflammation (BAL neutrophils, cytokines, neutrophil proteases), alveolar epithelial cell injury, systemic inflammation (neutrophils and plasma C-reactive protein (CRP)) and platelet activation (thromboxane B2, TXB2). Human lungs, perfused and ventilated ex vivo (EVLP) were randomised to placebo or 24 mg aspirin and injured with LPS. BAL was carried out 4 hours later. Inflammation was assessed by BAL differential cell counts and histological changes. RESULTS: In the healthy volunteer (n=33) model, data for the aspirin groups were combined. Aspirin did not reduce BAL IL-8. However, aspirin reduced pulmonary neutrophilia and tissue damaging neutrophil proteases (Matrix Metalloproteinase (MMP)-8/-9), reduced BAL concentrations of tumour necrosis factor α and reduced systemic and pulmonary TXB2. There was no difference between high-dose and low-dose aspirin. In the EVLP model, aspirin reduced BAL neutrophilia and alveolar injury as measured by histological damage. CONCLUSIONS: These are the first prospective human data indicating that aspirin inhibits pulmonary neutrophilic inflammation, at both low and high doses. Further clinical studies are indicated to assess the role of aspirin in the prevention and treatment of ARDS. TRIAL REGISTRATION NUMBER: NCT01659307 Results.


Assuntos
Anti-Inflamatórios não Esteroides/uso terapêutico , Aspirina/uso terapêutico , Lipopolissacarídeos/administração & dosagem , Síndrome do Desconforto Respiratório/tratamento farmacológico , Adulto , Biomarcadores/metabolismo , Lavagem Broncoalveolar , Proteína C-Reativa/imunologia , Citocinas/imunologia , Método Duplo-Cego , Feminino , Humanos , Inflamação/tratamento farmacológico , Inalação , Interleucina-8/imunologia , Masculino , Neutrófilos/imunologia , Estudos Prospectivos , Síndrome do Desconforto Respiratório/diagnóstico , Síndrome do Desconforto Respiratório/imunologia , Resultado do Tratamento , Voluntários
12.
Acta Psychiatr Scand ; 135(2): 127-137, 2017 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-27805260

RESUMO

OBJECTIVE: Children of parents with major depression are at significantly increased risk for developing major depression themselves; however, not all children at genetic risk will develop major depressive disorder (MDD). We investigated the utility of subsyndromal scores on the Child Behavior Checklist (CBCL) Anxiety/Depression scale in identifying children at the highest risk for pediatric MDD from among the pool of children of parents with MDD or bipolar disorder. METHOD: The sample was derived from two previously conducted longitudinal case-control family studies of psychiatrically and pediatrically referred youth and their families. For this study, probands were stratified based on the presence or absence of a parental mood disorder. RESULTS: Subsyndromal scores on the CBCL Anxiety/Depression scale significantly separated the children at high risk for pediatric MDD from those at low risk in a variety of functional areas, including social and academic functioning. Additionally, children at genetic risk without elevated CBCL Anxiety/Depression scale scores were largely indistinguishable from controls. CONCLUSION: These results suggest that the CBCL Anxiety/Depression scale can help identify children at highest risk for pediatric MDD. If implemented clinically, this scale would cost-effectively screen children and identify those most in need of early intervention resources to impede the progression of depression.


Assuntos
Transtornos de Ansiedade/diagnóstico , Transtornos do Comportamento Infantil/diagnóstico , Filho de Pais com Deficiência/psicologia , Transtorno Depressivo Maior/complicações , Pais/psicologia , Adolescente , Transtornos de Ansiedade/etiologia , Transtornos de Ansiedade/psicologia , Criança , Transtornos do Comportamento Infantil/etiologia , Manual Diagnóstico e Estatístico de Transtornos Mentais , Feminino , Humanos , Masculino , Escalas de Graduação Psiquiátrica , Fatores de Risco
13.
Epidemiol Infect ; 145(11): 2390-2399, 2017 08.
Artigo em Inglês | MEDLINE | ID: mdl-28712384

RESUMO

The 7 and 13-valent pneumococcal conjugate vaccines (PCVs) have reduced the incidence of invasive pneumococcal disease (IPD) in children in many countries. The objective of this work was to assess the impact of PCVs and potential herd-protection in older adults in Ireland. IPD notification and typing data from adults ⩾65 years of age from July 2007 to June 2016 was assessed using national surveillance data. There was a 94% reduction in PCV7 serotypes from 2007-2008 to 2015-2016, incidence rate ratio (IRR 0·05, P < 0·0001). However, there was no decline in the additional PCV13 (PCV13-7) serotypes over the same period (IRR 0·90) nor in comparison with the pre-PCV13 period 2009-2010 (IRR 0·92). The incidence of serotypes in the 23-valent pneumococcal polysaccharide vaccine only (PPV23-PCV13) and non-vaccine types (NVTs) increased significantly (IRR 2·17, P = 0·0002 and IRR 3·43, P = 0·0001 respectively). Consequently, the overall IPD incidence rate in adults has remained relatively unchanged (from 28·66/100 000 to 28·88/100 000, IRR 1·01, P = 0·9477). Serotype 19A and NVTs were mainly responsible for penicillin resistance in recent years. The decline of PCV7 serotypes indicate that the introduction of PCV7 resulted in herd-protection for adults. However, increases in PPV23-PCV13 and NVTs suggest that changes in vaccination strategy amongst older adults are needed to build on the success of PCVs in children.


Assuntos
Infecções Pneumocócicas/prevenção & controle , Vacinas Pneumocócicas/administração & dosagem , Streptococcus pneumoniae/imunologia , Idoso , Idoso de 80 Anos ou mais , Humanos , Irlanda/epidemiologia , Infecções Pneumocócicas/epidemiologia , Infecções Pneumocócicas/microbiologia
14.
Cereb Cortex ; 26(12): 4513-4523, 2016 12.
Artigo em Inglês | MEDLINE | ID: mdl-27797835

RESUMO

Cortical perception of noxious stimulation is an essential component of pain experience but it is not known how cortical nociceptive activity emerges during brain development. Here we use continuous telemetric electrocorticogram (ECoG) recording from the primary somatosensory cortex (S1) of awake active rat pups to map functional nociceptive processing in the developing brain over the first 4 weeks of life. Cross-sectional and longitudinal recordings show that baseline S1 ECoG energy increases steadily with age, with a distinctive beta component replaced by a distinctive theta component in week 3. Event-related potentials were evoked by brief noxious hindpaw skin stimulation at all ages tested, confirming the presence of functional nociceptive spinothalamic inputs in S1. However, hindpaw incision, which increases pain sensitivity at all ages, did not increase S1 ECoG energy until week 3. A significant increase in gamma (20-50 Hz) energy occurred in the presence of skin incision at week 3 accompanied by a longer-lasting increase in theta (4-8 Hz) energy at week 4. Continuous ECoG recording demonstrates specific postnatal functional stages in the maturation of S1 cortical nociception. Somatosensory cortical coding of an ongoing pain "state" in awake rat pups becomes apparent between 2 and 4 weeks of age.


Assuntos
Nociceptividade/fisiologia , Córtex Somatossensorial/crescimento & desenvolvimento , Córtex Somatossensorial/fisiologia , Animais , Estudos Transversais , Eletrocorticografia , Eletrodos Implantados , Potenciais Evocados/fisiologia , Ritmo Gama/fisiologia , Membro Posterior/lesões , Estudos Longitudinais , Masculino , Vias Neurais/crescimento & desenvolvimento , Vias Neurais/fisiologia , Estimulação Física , Ratos Sprague-Dawley , Processamento de Sinais Assistido por Computador , Pele/lesões , Telemetria , Ritmo Teta/fisiologia , Percepção do Tato/fisiologia
15.
Ir Med J ; 110(9): 631, 2017 Oct 10.
Artigo em Inglês | MEDLINE | ID: mdl-29372946

RESUMO

This work aims to contribute to the evidence base regarding the health of those who experience homelessness in Ireland by collating data on methadone use, drug-related deaths and emergency department presentations due to self-harm. Data from the Central Methadone Treatment List (CTL), National Self-Harm Registry Ireland and the National Drug-Related Deaths Index were analysed. The percentage on the CTL registered as being of no fixed abode (NFA) or homeless increased from 2% to 7% from 2011-2014. The absolute number of presentations with deliberate self-harm from those of NFA increased by 49% from 2007-2014. The number of drug-related deaths amongst those of NFA or homeless and who died in Dublin fluctuated from 2004-13 with an overall upward trend. There is an urgent need to adequately resource and coordinate those services which aim to address factors (social and health inequalities, mental ill-health and addiction) which lead people into - and prevent them exiting from - homelessness.


Assuntos
Pessoas Mal Alojadas/estatística & dados numéricos , Metadona/uso terapêutico , Tratamento de Substituição de Opiáceos/mortalidade , Comportamento Autodestrutivo/epidemiologia , Transtornos Relacionados ao Uso de Substâncias/mortalidade , Serviço Hospitalar de Emergência , Humanos , Irlanda/epidemiologia , Mortalidade/tendências
16.
Phys Rev Lett ; 116(9): 095004, 2016 Mar 04.
Artigo em Inglês | MEDLINE | ID: mdl-26991183

RESUMO

An unstable branch of the energetic geodesic acoustic mode (EGAM) is found using fluid theory with fast ions characterized by their narrow width in energy distribution and collective transit along field lines. This mode, with a frequency much lower than the thermal GAM frequency ω_{GAM}, is now confirmed as a new type of unstable EGAM: a reactive instability similar to the two-stream instability. The mode can have a very small fast ion density threshold when the fast ion transit frequency is smaller than ω_{GAM}, consistent with the onset of the mode right after the turn-on of the beam in DIII-D experiments. The transition of this reactive EGAM to the velocity gradient driven EGAM is also discussed.

17.
Vis Neurosci ; 33: E008, 2016 01.
Artigo em Inglês | MEDLINE | ID: mdl-27485271

RESUMO

The medial part of the nucleus of Edinger-Westphal (EWM) in birds mediates light-regulated adaptive increases in choroidal blood flow (ChBF). We sought to characterize the effect of loss of EWM-mediated ChBF regulation on photoreceptor health in pigeons housed in either moderate intensity diurnal or constant light (CL). Photoreceptor abundance following complete EWM destruction was compared to that following a lesion in the pupil control circuit (as a control for spread of EWM lesions to the nearby pupil-controlling lateral EW) or following no EW damage. Birds were housed post-lesion in a 12 h 400 lux light/12 h dark light cycle for up to 16.5 months, or in constant 400 lux light for up to 3 weeks. Paraformaldehyde-glutaraldehyde fixed eyes were embedded in plastic, sectioned, slide-mounted, and stained with toluidine blue/azure II. Blinded analysis of photoreceptor outer segment abundance was performed, with outer segment types distinguished by oil droplet tint and laminar position. Brains were examined histologically to assess lesion accuracy. Disruption of pupil control had no adverse effect on photoreceptor outer segment abundance in either diurnal light or CL, but EWM destruction led to 50-60% loss of blue/violet cone outer segments in both light conditions, and a 42% loss of principal cone outer segments in CL. The findings indicate that adaptive regulation of ChBF by the EWM circuit plays a role in maintaining photoreceptor health and mitigates the harmful effect of light on photoreceptors, especially short wavelength-sensitive cone photoreceptors.


Assuntos
Corioide/irrigação sanguínea , Artérias Ciliares/inervação , Núcleo de Edinger-Westphal/fisiologia , Sistema Nervoso Parassimpático/fisiologia , Lesões Experimentais por Radiação/patologia , Células Fotorreceptoras Retinianas Cones/patologia , Degeneração Retiniana/patologia , Animais , Colina O-Acetiltransferase/metabolismo , Columbidae/fisiologia , Feminino , Luz/efeitos adversos , Masculino , Lesões Experimentais por Radiação/etiologia , Fluxo Sanguíneo Regional/fisiologia , Células Fotorreceptoras Retinianas Cones/efeitos da radiação , Degeneração Retiniana/etiologia
18.
J Endocrinol Invest ; 39(3): 315-22, 2016 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-26243508

RESUMO

INTRODUCTION: The cortisol, cortisone, corticosterone, and CBG responses to exercise in the AM and PM have not been described. This study examined the response of these glucocorticoids and CBG to intense exercise in 12 endurance-trained men in plasma (Pl) and saliva (Sa). METHODS: Each subject completed treadmill exercise in the morning and evening. Paired blood and Sa samples were obtained at rest before and after exercise. RESULTS: Significant time effect existed for Pl-cortisol and Sa-cortisol from baseline in the AM and PM (p < 0.01). Pl-cortisone and CBG significantly increased in the PM (p < 0.01). Pl-corticosterone increased in the AM and PM (p < 0.01). Unlike Pl-cortisone, Sa-cortisone was significantly higher in the AM compared to the PM, increasing in the AM and PM (All p < 0.01). Strong associations were found between Pl-cortisol and Sa-cortisol (r = 0.81, p < 0.0001), Pl-cortisol and Sa-cortisone (r = 0.81, p < 0.0001). CONCLUSIONS: (1) Intense EX induces a similar increase in Pl-cortisone (~90 %) and corticosterone (~200 %) in the AM and PM, whereas exercise increases CBG in the PM, but not in the AM; (2) vigorous exercise increases Sa-cortisone; (3) Sa-cortisone and cortisol are equally strongly correlated to Pl-cortisol, suggesting a significant role for Sa-cortisone as a novel marker of free cortisol during exercise.


Assuntos
Biomarcadores/metabolismo , Corticosterona/metabolismo , Cortisona/metabolismo , Exercício Físico/fisiologia , Plasma/metabolismo , Saliva/metabolismo , Adolescente , Adulto , Ritmo Circadiano , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem
19.
Surgeon ; 14(2): 82-6, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-25444439

RESUMO

INTRODUCTION: There is an average of 25 cases of penile cancer in the Republic of Ireland each year. Due to the low volume of cases, the National Institute for Clinical Excellence recommends that treatment is centralised to allow the best standardised treatment for primary tumours and nodal disease. OBJECTIVES: To determine whether outcomes for patients with penile cancer differed significantly between secondary and tertiary referral centres in the Republic of Ireland. METHODS: Between 2001 and 2014, 36 patients were treated in the Mercy University Hospital (MUH) with penile cancer. Twenty patients were treated primarily in MUH and 16 patients underwent initial management in a secondary referral centre (SRC) with subsequent referral to the MUH. A retrospective matched case-control study was performed on this patient cohort. RESULTS: There were no significant differences in length of follow-up or risk factors for the development of penile cancer between both groups (p = 0.6 and p = 0.5 respectively) Ultimately, the incidence of high risk disease, nodal metasases, high grade disease and pelvic lymph node dissection were significantly greater in patients that were initially managed in a SRC (p = 0.02, p = 0.03, p = 0.004 and p = 0.028 respectively). Patients undergoing initial treatment in a SRC had a non-significantly reduced rate of cancer specific survival (88 Vs 66%, MUH Vs SRCs, p = 0.495) and recurrence free survival (85 Vs 46%, MUH Vs SRCs, p = 0.24). CONCLUSION: Our findings suggest that managing penile cancer in special interest centres may improve oncological outcome.


Assuntos
Gerenciamento Clínico , Estadiamento de Neoplasias , Neoplasias Penianas/terapia , Idoso , Seguimentos , Humanos , Incidência , Irlanda/epidemiologia , Masculino , Pessoa de Meia-Idade , Neoplasias Penianas/epidemiologia , Estudos Retrospectivos
20.
Ir Med J ; 109(4): 396, 2016 Apr 11.
Artigo em Inglês | MEDLINE | ID: mdl-27685490

RESUMO

The prevalence of Mycobacterium avium complex (MAC) pulmonary disease is increasing globally. However, reliable national and international data relating to its epidemiology and management is lacking. During the period 2003-2014, MAC was isolated from the pulmonary samples of 75 patients at the Irish Mycobacteria Reference Laboratory (IMRL). Most patients (42, 56%) had underlying pulmonary disease, and 37 (49%) had clinical/radiographic characteristics consistent with MAC pulmonary disease. However, only 18 patients (24%) fulfilled internationally accepted criteria for diagnosis/treatment of this disease. Treatment was started in 13 (72%) of these cases, which is similar to internationally published treatment rates. The diagnosis of significant MAC pulmonary disease can be difficult, and treatment is not always warranted even when diagnostic criteria are met.

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