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1.
Clin Oncol (R Coll Radiol) ; 34(1): e61-e68, 2022 01.
Artigo em Inglês | MEDLINE | ID: mdl-34728131

RESUMO

AIMS: Although health-related quality of life (HR-QoL) outcomes are pivotal in oncology, the prognostic significance of patient-reported HR-QoL metrics is largely undefined in localised prostate cancer. We report the association of baseline HR-QoL metrics with overall survival and toxicity in localised prostate cancer. MATERIALS AND METHODS: This was a secondary analysis of a phase III randomised controlled study conducted in a single-payer health system. Patients with Gleason score ≤7, clinical stage T1b-T3a and prostate-specific antigen <30 ng/ml were randomised to neoadjuvant and concurrent androgen deprivation therapy (ADT) for 6 months starting 4 months before prostate radiotherapy or concurrent and adjuvant ADT for 6 months starting simultaneously with prostate radiotherapy. HR-QoL scores were estimated using the European Organisation for Research and Treatment of Cancer QoL questionnaire. A multistate Markov model was used to determine the association of baseline HR-QoL metrics with overall survival and a multilevel multivariable Cox regression was used to determine the association with the incidence of delayed-onset grade ≥3 radiotherapy-related toxicities. To adjust for multiple analyses, P < 0.025 was considered as statistically significant. RESULTS: Overall, 393 patients with baseline HR-QoL data were included in this analysis: 194 in the neoadjuvant arm and 199 in the adjuvant arm. Baseline financial difficulty (hazard ratio 1.020, 95% confidence interval 1.010-1.030, P = 0.02) and dyspnoea (hazard ratio 1.020, 95% confidence interval 1.003-1.030, P = 0.01) were associated with inferior overall survival. Baseline dyspnoea was associated with a higher incidence of grade ≥3 toxicity (hazard ratio 1.020, 95% confidence interval 1.010-1.030, P = 0.023). CONCLUSION: In a cohort of localised prostate cancer patients treated with radiotherapy and short-term ADT, a 10-point higher baseline financial difficulty or dyspnoea was associated with a 20% increased risk of death. With each 10-point increase in baseline dyspnoea, we noted a 20% increase in the associated risk of grade ≥3 delayed-onset radiotherapy-related toxicity.


Assuntos
Neoplasias da Próstata , Qualidade de Vida , Antagonistas de Androgênios/efeitos adversos , Benchmarking , Humanos , Masculino , Medidas de Resultados Relatados pelo Paciente , Antígeno Prostático Específico , Neoplasias da Próstata/radioterapia
2.
Eur J Appl Physiol ; 121(11): 2993-3003, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-34235576

RESUMO

PURPOSE: Variations in substrate metabolism have been identified in women during continuous steady-state aerobic exercise performed at the same relative intensity throughout discrete phases of the menstrual cycle, although some evidence exists that this is abolished when carbohydrate is ingested. This investigation examined the effects of a supraphysiologic exogenous glucose infusion protocol, administered during two phases of the menstrual cycle (follicular and luteal) in eumenorrheic women to identify differences between metabolic, hormonal and substrate oxidative responses. METHODS: During the experimental conditions, blood glucose was infused intravenously at rates to "clamp" blood glucose at 10 mM in seven healthy females (age 20 ± 1 y, mass 55.0 ± 4.1 kg, [Formula: see text] 40.0 ± 1.8 ml/kg/min). Following 30 min of seated rest, participants exercised on a cycle ergometer for 90 min at 60% [Formula: see text]. During the rest period and throughout exercise, blood metabolites and hormones were collected at regular intervals, in addition to expired air for the measurement of substrate oxidation. RESULTS: Significant differences between ovarian hormones and menstrual phase were identified, with estrogen significantly higher during the luteal phase compared to the follicular phase (213.28 ± 30.70 pmol/l vs 103.86 ± 13.85 pmol/l; p = 0.016), and for progesterone (14.23 ± 4.88 vs 2.11 ± 0.36 nmol/l; p = 0.042). However, no further significance was identified in any of the hormonal, metabolite or substrate utilisation patterns between phases. CONCLUSION: These data demonstrate that the infusion of a supraphysiological glucose dose curtails any likely metabolic influence employed by the fluctuation of ovarian hormones in eumenorrheic women during moderate exercise.


Assuntos
Exercício Físico/fisiologia , Glucose/administração & dosagem , Hormônios/metabolismo , Hiperglicemia/fisiopatologia , Ciclo Menstrual/fisiologia , Feminino , Humanos , Consumo de Oxigênio/fisiologia , Adulto Jovem
3.
Ann ICRP ; 49(1_suppl): 143-153, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-32777956

RESUMO

Whereas scientific evidence is the basis for recommendations and guidance on radiological protection, professional ethics is critically important and should always guide professional behaviour. The International Commission on Radiological Protection (ICRP) established Task Group 109 to advise medical professionals, patients, families, carers, the public, and authorities about the ethical aspects of radiological protection of patients in the diagnostic and therapeutic use of radiation in medicine. Occupational exposures and research-related exposures are not within the scope of this task group. Task Group 109 will produce a report that will be available to the different interested parties for consultation before publication. Presently, the report is at the stage of a working document that has benefitted from an international workshop organised on the topic by the World Health Organization. It presents the history of ethics in medicine in ICRP, and explains why this subject is important, and the benefits it can bring to the standard biomedical ethics. As risk is an essential part in decision-making and communication, a summary is included on what is known about the dose-effect relationship, with emphasis on the associated uncertainties. Once this theoretical framework has been presented, the report becomes resolutely more practical. First, it proposes an evaluation method to analyse specific situations from an ethical point of view. This method allows stakeholders to review a set of six ethical values and provides hints on how they could be balanced. Next, various situations (e.g. pregnancy, elderly, paediatric, end of life) are considered in two steps: first within a realistic, ethically challenging scenario on which the evaluation method is applied; and second within a more general context. Scenarios are presented and discussed with attention to specific patient circumstances, and on how and which reflections on ethical values can be of help in the decision-making process. Finally, two important related aspects are considered: how should we communicate with patients, family, and other stakeholders; and how should we incorporate ethics into the education and training of medical professionals?


Assuntos
Guias como Assunto , Medicina Nuclear/ética , Exposição à Radiação/prevenção & controle , Proteção Radiológica/normas , Humanos , Agências Internacionais
4.
Burns ; 42(4): 836-43, 2016 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-26847613

RESUMO

Stevens-Johnson Syndrome (SJS)/Toxic Epidermal Necrolysis (TEN) is a rare and often fatal spectrum of mucocutaneous diseases usually attributable to severe adverse drug reactions. Burn units are referral centers for patients at the most extreme end of the disease continuum. Our burn center admits a much higher percentage of TEN (>30% BSA) cases than reported in most prior reviews. The purpose of this study was to analyze the diagnostic and prognostic value of variables collected on referred SJS/TEN patients. We retrospectively analyzed 94 patients admitted to our unit with a presumptive SJS/TEN diagnosis made in most cases by the referring center. Most of the diagnoses were clinical. Fifty of the 94 patients underwent biopsy when the clinical diagnosis was questionable. Of the 50 patients who underwent biopsy, 18 (36%) received an alternative diagnosis. Analysis was therefore limited to 76 patients, i.e. 44 patients felt to have firm clinical diagnoses plus 32 patients with diagnoses confirmed by biopsy. Mean age was 54.3 years (17-93) and overall gender ratio was 43 F vs. 33 M (56.6% vs. 43.4%). Mean LOS was 15.2 days (1-48) and overall mortality was 23.7% (18/76). Univariate analysis revealed percent body surface area (%BSA) did not show statistically significant association with mortality. Histopathological correlation for diagnosis is not standardized across institutions worldwide. Due to challenges in the diagnosis of SJS/TEN and the high incidence of error in clinical diagnosis, it is recommended that all patients with presumed SJS/TEN receive skin biopsies with H&E and direct immunofluorescence. We propose a diagnostic approach in order to address this need. Lack of association between %BSA and mortality suggests that all biopsy-proven SJS/TEN cases belong in specialty centers due to the unstable nature of the disease and risk for rapid progression.


Assuntos
Unidades de Queimados/estatística & dados numéricos , Síndrome de Stevens-Johnson/diagnóstico , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Análise de Variância , Superfície Corporal , Diagnóstico Diferencial , Toxidermias/etiologia , Feminino , Humanos , Tempo de Internação , Masculino , Pessoa de Meia-Idade , Prognóstico , Estudos Retrospectivos , Fatores de Risco , Distribuição por Sexo , Síndrome de Stevens-Johnson/mortalidade , Síndrome de Stevens-Johnson/patologia , Adulto Jovem
5.
Radiat Prot Dosimetry ; 153(2): 219-22, 2013 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-23169814

RESUMO

Quality assurance protocols and standards of performance for X-ray mammography equipment are probably the most developed of any in the area of diagnostic radiology, due to the exacting demands on image quality required in population-based breast cancer screening programmes. Both qualitative and quantitative acceptability criteria have been published for X-ray mammography by considering the image quality needed clinically in screening programmes. Consequently, the task of developing a consensus for acceptability criteria appears to be relatively easy at first glance. However, there are two contentious issues that must be considered; the first is whether standards based on breast cancer screening can be transposed to equipment used for women referred for imaging with breast symptoms. The second relates to the use of image-quality assessment based upon the observation of details in test phantoms. In respect of the former, there was general agreement that only one set of acceptability criteria should apply to mammographic X-ray equipment. With regard to image-quality assessment, the weakness of the observer-based methods was recognised and a consensus position developed. This paper describes the development of a consensus on acceptability criteria and proposes both qualitative and quantitative criteria for use on all mammographic equipment. Some test approaches and criteria for image displays, in particular, were omitted from the document as concerns about their robustness emerged during the consultation phases of the revision. Clearly, further scientific work is needed in these areas.


Assuntos
Neoplasias da Mama/diagnóstico por imagem , Neoplasias da Mama/diagnóstico , Mamografia/métodos , Mamografia/normas , Garantia da Qualidade dos Cuidados de Saúde/normas , Biópsia , Europa (Continente) , Feminino , Humanos , Processamento de Imagem Assistida por Computador , Imagens de Fantasmas , Garantia da Qualidade dos Cuidados de Saúde/métodos , Controle de Qualidade , Interpretação de Imagem Radiográfica Assistida por Computador , Reprodutibilidade dos Testes
6.
Radiat Prot Dosimetry ; 153(2): 143-6, 2013 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-23169813

RESUMO

In 1997 the European Commission published Radiation Protection 91: 'Criteria for acceptability of radiological (including radiotherapy) and nuclear medicine installations'. This document specified the minimum criteria for acceptability. It has been used to this effect in legislation, codes of practice and by individual professionals. In a single document, it defined a level of performance at which remedial action was required. The document specified a series of parameters which characterised equipment performance and acceptable levels of performance. In its time it proved to be a useful document which was applied in member states to various degrees. Since the publication of Report 91 in 1997, a series of weaknesses emerged over time. Development of new radiological systems and technologies, as well as improvements in traditional technologies, has created circumstances where the acceptability criteria were in need of review. These weaknesses were recognised by the European Commission and a tender for its revision was issued. The criteria were developed by a team drawn from a broad range of backgrounds including hospitals, industry, government bodies, regulators and standardisation organisations. Representatives were mainly from Europe, but individuals from the American Association of Physicists in Medicine and International Atomic Energy Agency were included in the drafting process. This study describes the process employed in developing the revised document and the consultation process involved. One of the major difficulties the revision team encountered was related to an understanding of the actual meaning of the EC Directive. The view taken by the revision team was that Article 8, paragraph 3 places responsibilities on both the holders of radiological equipment and competent authorities. The acceptability criteria have been produced consistent with the European Commission's Medical Exposures Directive, which requires that patient exposures are optimised and justified.


Assuntos
Medicina Nuclear/instrumentação , Radioterapia/normas , Europa (Continente) , Humanos , Medicina Nuclear/métodos , Doses de Radiação , Lesões por Radiação/prevenção & controle , Proteção Radiológica/métodos , Radiologia/instrumentação , Radiologia/normas , Radioterapia/instrumentação , Estados Unidos
7.
Radiat Prot Dosimetry ; 153(2): 185-9, 2013 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-23173220

RESUMO

The EC (European Council) Directive on radiation protection of patients requires that criteria for acceptability of equipment in diagnostic radiology, nuclear medicine and radiotherapy be established throughout the member states. This study reviews the background to this requirement and to its implementation in practice. It notes and considers parallel requirements in the EC medical devices directive and International Electrotechnical Commission standards that it is also important to consider and that both sets of requirements should ideally be harmonised due to the global nature of the equipment industry. The study further reviews the types of criteria that can be well applied for the above purposes, and defines qualitative criteria and suspension levels suitable for application. Both are defined and relationships with other acceptance processes are considered (including acceptance testing at the time of purchase, commissioning and the issue of second-hand equipment). Suspension levels are divided into four types, A, B, C and D, depending on the quality of evidence and consensus they are based on. Exceptional situations involving, for example, new or rapidly evolving technology are also considered. The publication and paper focuses on the role of the holder of the equipment and related staff, particularly the medical physics expert and the practitioner. Advice on how the criteria should be created and implemented is provided for these groups and how this might be coordinated with the supplier. Additional advice on the role of the regulator is provided.


Assuntos
Medicina Nuclear/normas , Radiologia/normas , Radioterapia/normas , Europa (Continente) , Humanos , Medicina Nuclear/métodos , Lesões por Radiação/prevenção & controle , Proteção Radiológica/métodos , Radiologia/métodos , Radioterapia/métodos
8.
Diabet Med ; 28(6): 705-14, 2011 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-21434995

RESUMO

AIMS: In the initial 26-week, double-blind, double-dummy assessment period of the DURATION-2 trial in patients with Type 2 diabetes on metformin, the once-weekly glucagon-like peptide 1 (GLP-1) receptor agonist exenatide once-weekly resulted in greater HbA(1c) improvement and weight reduction compared with maximum approved daily doses of sitagliptin or pioglitazone. This subsequent, 26-week, open-label, uncontrolled assessment period evaluated the safety and efficacy of (i) continued exenatide once-weekly treatment and (ii) switching from sitagliptin or pioglitazone to exenatide once-weekly. METHODS: Randomised oral medications were discontinued and all patients received exenatide once-weekly. Of the 364 patients [original baseline HbA(1c) 8.5 ± 1.1% (70 mmol/mol), fasting plasma glucose 9.0 ± 2.5 mmol/l, weight 88 ± 20 kg) who continued into the open-label period, 319 patients (88%) completed 52 weeks. RESULTS: Evaluable patients who received only exenatide once-weekly demonstrated significant 52-week improvements (least square mean ± se) in HbA(1c) (-1.6 ± 0.1%), fasting plasma glucose (-1.8 ± 0.3 mmol/l) and weight (-1.8 ± 0.5 kg). Evaluable patients who switched from sitagliptin to exenatide once-weekly demonstrated significant incremental improvements in HbA(1c) (-0.3 ± 0.1%), fasting plasma glucose (-0.7 ± 0.2 mmol/l) and weight (-1.1 ± 0.3 kg). Patients who switched from pioglitazone to exenatide once-weekly maintained HbA(1c) and fasting plasma glucose improvements (week 52: -1.6 ± 0.1%, -1.7 ± 0.3 mmol/l), with significant weight reduction (-3.0 ± 0.3 kg). Exenatide once-weekly was generally well tolerated and adverse events were predominantly mild or moderate in intensity. Nausea was the most frequent adverse event in this assessment period (intent-to-treat: exenatide once-weekly-only 5%; sitagliptin→exenatide once-weekly 11%; pioglitazone→exenatide once-weekly 10%). No major hypoglycaemia was observed. CONCLUSIONS: Patients who switched to once-weekly exenatide from daily sitagliptin or pioglitazone had improved or sustained glycaemic control, with weight loss.


Assuntos
Diabetes Mellitus Tipo 2/tratamento farmacológico , Peptídeo 1 Semelhante ao Glucagon/efeitos dos fármacos , Hemoglobinas Glicadas/efeitos dos fármacos , Hipoglicemiantes/administração & dosagem , Metformina/administração & dosagem , Peptídeos/administração & dosagem , Pirazinas/administração & dosagem , Tiazolidinedionas/administração & dosagem , Triazóis/administração & dosagem , Peçonhas/administração & dosagem , Diabetes Mellitus Tipo 2/sangue , Diabetes Mellitus Tipo 2/fisiopatologia , Método Duplo-Cego , Esquema de Medicação , Substituição de Medicamentos , Exenatida , Feminino , Peptídeo 1 Semelhante ao Glucagon/sangue , Humanos , Masculino , Pessoa de Meia-Idade , Pioglitazona , Fosfato de Sitagliptina , Resultado do Tratamento
9.
J Minim Invasive Gynecol ; 17(1): 104-6, 2010.
Artigo em Inglês | MEDLINE | ID: mdl-20129341

RESUMO

BACKGROUND: This report describes an unusual first case in which an abscess containing Haemophilus influenzae incorporates the entire uterine cavity without overt signs of infection. CASE: A 39-year-old woman presented with right lower quadrant abdominal pain and a large abdominal pelvic mass. Evaluation with computed tomography and ultrasonography showed a 20- x 14- x 10-cm cystic mass arising from the uterus. Tumor markers were negative. The patient underwent a total abdominal hysterectomy. Intraoperative findings included a 20-cm intramyometrial uterine abscess, completely replacing the uterine cavity. The abscess was densely adhered to the sigmoid colon. The mass was ruptured during the surgical procedure when mobilizing it off the colon, and cultures were obtained. Microbiologic culture illustrated H. influenzae. Pathologic diagnosis confirmed an intramyometrial abscess, originating from the wall of the uterus occupying the entire uterine cavity, lined with granulation tissue, foamy macrophages, and chronic inflammation. CONCLUSION: Intramyometrial abscesses can masquerade as degenerating fibroids and, even with microorganisms, can exist without overt signs or symptoms of an active infection.


Assuntos
Abscesso Abdominal/diagnóstico , Infecções por Haemophilus/diagnóstico , Haemophilus influenzae , Neoplasias Uterinas/diagnóstico , Abscesso Abdominal/complicações , Abscesso Abdominal/cirurgia , Dor Abdominal/etiologia , Dor Abdominal/cirurgia , Adulto , Diagnóstico Diferencial , Feminino , Infecções por Haemophilus/complicações , Infecções por Haemophilus/cirurgia , Humanos , Histerectomia , Laparotomia , Aderências Teciduais/cirurgia , Neoplasias Uterinas/cirurgia
10.
Eur Respir J ; 35(2): 410-7, 2010 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-19679607

RESUMO

Serine proteases released from neutrophils are central to the pathogenesis of cystic fibrosis lung disease and are considered to be obvious therapeutic targets. Neutrophil elastase digests key opsonins present in the lung and disrupts phagocytosis, allowing bacteria to persist despite established pulmonary inflammation. We have found that cathepsin G, an abundant serine protease found in human and murine neutrophils, has other roles in the development of suppurative lung diseases. Murine models of endobronchial inflammation indicate that cathepsin G inhibits airway defences and interferes with the host's ability to clear Pseudomonas aeruginosa from the lung with effects distinct from neutrophil elastase. We hypothesise that differences in bacterial killing are due to defects in innate defences created by proteolysis. Protein profiles of bronchoalveolar lavage of infected wild-type and cathepsin G-deficient mice were compared using two-dimensional polyacrylamide gel electrophoresis and tandem mass spectrometry. Four proteins in bronchoalveolar lavage were cleaved by cathepsin G. Serum amyloid P component leaked into the lung during acute infection and was digested by cathepsin G. Its cleavage products had greater binding to lipopolysaccharide and interfered with phagocytosis. These results indicate that cleaved serum amyloid P component acts as an anti-opsonin and interferes with bacterial clearance from the lung.


Assuntos
Catepsina G/química , Animais , Brônquios/microbiologia , Lavagem Broncoalveolar , Catepsina G/metabolismo , Eletroforese em Gel Bidimensional/métodos , Células HL-60 , Humanos , Pulmão/microbiologia , Pulmão/patologia , Camundongos , Camundongos Transgênicos , Neutrófilos/metabolismo , Proteínas Opsonizantes/química , Fagocitose , Componente Amiloide P Sérico/biossíntese , Espectrometria de Massas em Tandem/métodos
11.
Radiat Prot Dosimetry ; 135(2): 71-8, 2009 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-19264829

RESUMO

The ethical framework within which medicine operates has changed radically over the last two decades. This has been stimulated by events leading to controversy, such as the infant organ retention scandals; concerns about blood products; self regulation of medical practice in the wake of the Harold Shipman Enquiry in the UK; and many other events. It has become obvious following investigations and/or public enquiries that a gap has opened up between what is acceptable to the public on the one hand, and what appears reasonable to, or is at least accepted by, the professionals involved on the other. This paper reviews these issues and some conclusions of a workshop held to consider them. It places the developments in the context of the idea that the approach to problems and communication in a group of people/professionals such as doctors, radiologists, radiation protection specialists, or even the general public may be regarded as a 'culture'. Current practice of radiation protection in medicine is examined in the light of these considerations.


Assuntos
Lesões por Radiação/prevenção & controle , Proteção Radiológica/métodos , Radiologia/ética , Radiologia/métodos , Radiometria/métodos , Características Culturais , Diagnóstico por Imagem , Ética Médica , Humanos , Meios de Comunicação de Massa , Desenvolvimento de Programas , Doses de Radiação
12.
J Pathol ; 217(3): 380-8, 2009 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-19016568

RESUMO

Disease-associated BRCA2 mutations typically result in protein truncations that delete the phosphorylation-regulated S3291 BRCA2 domain that interacts with Rad51. BRCA2 hereditary breast cancers are usually ER(+), differing from BRCA1 hereditary cancers, which are usually ER(-). We studied BRCA2 protein expression and S3291 phosphorylation in normal breast tissues and in sporadic breast cancers and observed that BRCA2 is expressed and phosphorylated in normal breast and 10 ER(+) breast cancers but not in 10 ER(-) breast cancers. In order to study this correlation between ER and BRCA2 expression, we studied ER(+) breast cancer cell lines. We found that a rapid increase in BRCA2 S3291 phosphorylation occurs following 17-beta-oestradiol (E2) treatment. This increase seen in BRCA2 total and phospho-S3291 protein levels was found to be unaffected with cycloheximide pre-treatment, but decreased following tamoxifen, ICI 182,780 or roscovitine treatment. This suggests a requirement for ER and cdk (cyclin-dependent kinase) in mediating the increased protein levels. MCF7 cell cycle distribution analysis following E2, in both the presence and absence of roscovitine (a cdk inhibitor), did not demonstrate any changes during an 8 h period, which further supports our hypothesis that mitogenic effects of E2 are not predominant at early time points. Studies with MG132 proteasome inhibitor and siRNA to skp2 support a model in which skp2-mediated proteasomal degradation of BRCA2 rapidly degrades BRCA2 protein in the absence of hormone treatment, which likely inhibits this pathway. E2 was shown to improve survival of MCF7 cells upon radiation treatment and roscovitine partially reversed this effect. We have demonstrated that BRCA2 protein is specifically expressed in ER(+) breast cancers and are investigating a pathway that may show a link between E2 action and BRCA2 protein function in breast cancer.


Assuntos
Proteína BRCA2/metabolismo , Neoplasias da Mama/metabolismo , Estrogênios/farmacologia , Proteína BRCA2/análise , Western Blotting/métodos , Mama/metabolismo , Linhagem Celular Tumoral , Reparo do DNA , Estrogênios/metabolismo , Feminino , Humanos , Imuno-Histoquímica , Fosforilação , Reação em Cadeia da Polimerase Via Transcriptase Reversa/métodos
13.
Radiat Prot Dosimetry ; 129(1-3): 211-3, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18397931

RESUMO

The use of dual-energy X-ray absorptiometry (DXA) scanners for measuring bone mineral density (BMD) is on the increase. A single DXA scan is a relatively low-dose diagnostic X-ray examination; however, radiation protection (RP) issues should not be trivialised. One objective of the EU 6th Framework SENTINEL co-ordination action was to develop training syllabi in RP and quality assurance (QA) for BMD, and this study presents the results. An EU-wide survey was carried out which confirmed that there was a need for an accredited DXA RP training course in many EU states. There is also limited published guidance on acceptance testing/QA for DXA. Two training syllabi were developed: one on RP and one on QA of DXA systems. A training course was delivered in Ireland in 2006 by the Medical Physics & Bioengineering Department of St James's Hospital, Dublin. Following the training course, a PC-based training CD was developed and will be made available. A harmonised approach to training will promote consistent approaches to radiation safety across the EU.


Assuntos
Absorciometria de Fóton/métodos , Densidade Óssea , Desenvolvimento de Programas , Garantia da Qualidade dos Cuidados de Saúde , Proteção Radiológica/legislação & jurisprudência , Proteção Radiológica/métodos , Radiologia/educação , Absorciometria de Fóton/normas , Coleta de Dados , Humanos , Disseminação de Informação
14.
Radiat Prot Dosimetry ; 129(1-3): 6-12, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18310608

RESUMO

The ethical basis for many medical practices has been challenged over the last two decades. Radiology has seen enormous growth during the same period. Many practices and equipment types, now commonplace, did not exist a generation ago. Yet the fundamental ethical basis for these practices has not seen a corresponding level of development. This is possibly an oversight, and may be particularly important given that these innovations have taken place over a period of changing social attitudes. Areas of concern include, for example, issues around justification, consent/authorisation, inadvertent irradiation of the foetus/embryo during pregnancy and the place of paternalism/individual autonomy in the structure of practice. This paper provides the background to a workshop on these issues held in late-2006 and presents a summary of its findings.


Assuntos
Diagnóstico por Imagem/ética , Diagnóstico por Imagem/normas , Ética Médica , Proteção Radiológica/legislação & jurisprudência , Radiologia/ética , Humanos
15.
Radiat Prot Dosimetry ; 129(1-3): 3-5, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18310611

RESUMO

Health-care expenditure on radiological equipment in Europe is a growing fraction of the gross domestic product for all member states. This increase in expenditure has been driven by technical developments in equipment design, matched by the introduction of novel clinical practices, examinations and procedures. The radiation protection implications of these developments have to be assessed. The SENTINEL co-ordination action covered radiation protection, safety and related issues that arise from these technical and clinical developments. SENTINEL covered 90% of patient examinations in European Radiology, 60% of the collective dose from medical sources and approximately 50% of the collective dose to European citizens from man-made sources. The SENTINEL co-ordination actions 'main' objective was to address the safety and efficacy issues which are common to all digital diagnostic imaging systems, including nuclear medicine. High-dose procedures and sensitive groups (such as children) were covered by the project. Specifically, the co-ordination action aimed: (1) to establish both physical and clinical image quality criteria and link the two, (2) to undertake a series of dosimetry studies to establish the reference levels for new procedures and (3) to develop good practice guidelines for radiation protection in digital imaging and produce training material.


Assuntos
Diagnóstico por Imagem , Lesões por Radiação/prevenção & controle , Proteção Radiológica/economia , Proteção Radiológica/métodos , Radiometria/métodos , Humanos , Controle de Qualidade , Proteção Radiológica/normas
16.
Radiat Prot Dosimetry ; 129(1-3): 219-21, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18283059

RESUMO

The EU Council Directive 97/43/EURATOM (MED) states that Member States shall ensure that adequate theoretical and practical training is provided for dental practitioners working with ionising radiation; this also includes the provision of continuing education and training programmes, post-qualification. The area of dental radiology is specifically mentioned in this legally binding document. The Department of Medical Physics and Bioengineering, St James's Hospital, Dublin, is particularly interested in the area of radiation protection training and routinely provides educational courses both at national and international levels. A recent review of their dental radiation protection course was undertaken in conjunction with a number of Principal Dental Surgeons within the Health Service Executive in Ireland. The revised course was delivered to over 200 dental staff members at two separate meetings during 2006. The response from attendees was very positive. It is proposed to extend this course to other dental professionals, working both in the Irish private and public health sectors in the future.


Assuntos
Educação Continuada em Odontologia , Desenvolvimento de Programas , Proteção Radiológica/legislação & jurisprudência , Proteção Radiológica/métodos , Radiologia/educação , Humanos , Disseminação de Informação
17.
Radiat Prot Dosimetry ; 129(1-3): 96-9, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18287190

RESUMO

Relatively high organ doses absorbed by patients in interventional cardiology suggest the opportunity to define these patients as a cohort to be followed forward in time in an epidemiological study of the cancer risks associated with exposure to low-dose ionising radiation. In this paper, the UNSCEAR 2000 Report risk estimates for the most exposed organs/tissues in cardiac interventional procedures are reviewed, as well as the critical features of such an epidemiological study that is anticipated to have an intrinsically low statistical power because of the low levels of risk and possible confounding factors. To overcome these limitations, data collected in different institutions can be combined provided that a common design and conduct are used for dose assessment. A minimum dataset to be collected on a patient basis is proposed that can be implemented routinely in most facilities. This data should be linked to the local patient information system in order to retrieve all the exposures of a given patient.


Assuntos
Coração/efeitos da radiação , Neoplasias Induzidas por Radiação/epidemiologia , Doses de Radiação , Radiologia Intervencionista , Radioterapia/efeitos adversos , Bases de Dados Factuais , Humanos , Radiação Ionizante , Medição de Risco
18.
Radiat Prot Dosimetry ; 117(1-3): 79-86, 2005.
Artigo em Inglês | MEDLINE | ID: mdl-16461508

RESUMO

Interventional radiology has seen rapid growth in cardiology and represents an alternative to hazardous surgery. Recently there has been a substantial growth in the number of procedures being performed and interventional cardiology (IC) procedures are the most common interventional procedures in Europe. Advances in imaging technology have facilitated the development of increasingly complex radiological IC equipment. Currently, the technology is developing at a rate ahead of supporting research, equipment standards and a regulatory framework. International standards play a key role in the design, manufacture and performance of radiological IC equipment. A survey of 12 IC systems (15 imaging chains) was conducted in Irish hospitals. The aim of the study was to assess the imbalance between rapidly advancing technology and existing standards and to propose recommendations for new IC equipment standards. The results demonstrate the need for definitive equipment requirements and standardisation in the design, manufacture, acceptance and maintenance of IC equipment.


Assuntos
Cardiologia/instrumentação , Radiologia Intervencionista/instrumentação , Cardiologia/normas , Relação Dose-Resposta à Radiação , Desenho de Equipamento , Segurança de Equipamentos , Fluoroscopia/instrumentação , Fluoroscopia/normas , Humanos , Processamento de Imagem Assistida por Computador , Irlanda , Controle de Qualidade , Doses de Radiação , Radiologia Intervencionista/normas , Radiometria/métodos , Padrões de Referência
19.
Rev. biol. trop ; 52(4): 991-1000, dic. 2004. ilus
Artigo em Inglês | LILACS | ID: lil-450795

RESUMO

Comparison of recent and historical surveys of frog populations in cloudforest habitat in Sierra de las Minas,Guatemala,indicated population declines and local extirpation of several species.Pathological exams of diseased tadpoles indicated infection by amphibian chytridiomycosis. The local habitat has been severely altered by recent establishment of large-scale leatherleaf fern production.Analysis of water chemistry at our study site suggested increased nitrogenation associated with the leatherleaf industry


Una comparación entre un inventario anterior y otro reciente de poblaciones de ranas de bosque nublado en la Sierra de Las Minas de Guatemala demostró disminuciones poblacionales y ausencia localizada de varias especies.El examen patológico de un renacuajo muerto indicó infección por un hongo quítrido propio de los anfibios.El hábitat local ha sido gravemente alterado por el establecimiento reciente de producción a gran escala de helechos ornamentales.El análisis químico del agua en el área de estudio señaló un aumento en nitrogenación asociado al cultivo de helechos


Assuntos
Animais , Anuros/microbiologia , Desastres , Ecossistema , Gleiquênias/crescimento & desenvolvimento , Micoses/veterinária , Ecologia , Guatemala/epidemiologia , Micoses/mortalidade , Dinâmica Populacional
20.
Zhonghua Liu Xing Bing Xue Za Zhi ; 24(4): 253-6, 2003 Apr.
Artigo em Chinês | MEDLINE | ID: mdl-12820938

RESUMO

OBJECTIVE: To establish a minimum medical geographic information systems (GIS) database as a spatial decision supporting system (SDSS), and to use the database into public health practice in China. METHODS: Spatial data collected from different sources were standardized as decimal degree format, including: (1) satellite images covering areas of China; (2) digital maps of China in vector files; (3) diseases database and relevant models. RESULTS: Necessary satellite images for the database have been collected from NOAA AVHRR, Landsat TM, etc., including the normalized difference vegetation index (NDVI) images from AVHRR, earth surface temperature images from AVHRR, GTOPO30 DEM images from USGS and landuse images from USGS. The digital vector files for GIS analysis were collected including political (county, provinces, country) boundaries file, environmental (drainage, land cover, soil type) vector file, population data and climate data; Data on diseases mainly generated from survey or case reporting. Relevant models on transmission of Schistosoma japonicum and Plasmodium vivax, and models of Oncomelania hupensis and Anophores sinansis were developed, and the relevant environmental factors related to incidence of cancers were mapped, to test and verify those database. CONCLUSION: The database unified the data from different sources for users. Minimum medical data included in the database could be used in the practice of public health. It is expected that this database be used in a wider range.


Assuntos
Bases de Dados Factuais , Sistemas de Informação Geográfica , Animais , Anopheles/parasitologia , China/epidemiologia , Reservatórios de Doenças , Vetores de Doenças , Ecologia , Humanos , Malária/epidemiologia , Malária/prevenção & controle , Malária/transmissão , Plasmodium vivax , Comunicações Via Satélite , Esquistossomose Japônica/epidemiologia , Esquistossomose Japônica/prevenção & controle , Esquistossomose Japônica/transmissão , Caramujos/parasitologia
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