Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 12 de 12
Filtrar
1.
Genes (Basel) ; 15(2)2024 Feb 14.
Artigo em Inglês | MEDLINE | ID: mdl-38397231

RESUMO

Background: Undifferentiated pleomorphic sarcoma of bone (UPSb) is a rare primary bone sarcoma that lacks a specific line of differentiation. Distinguishing between UPSb and other malignant bone sarcomas, including dedifferentiated chondrosarcoma and osteosarcoma, is challenging due to their overlapping features. We have previously identified that UPSb tumours have elevated mRNA levels of Fibroblast Growth Factor 23 (FGF23) transcripts compared to other sarcomas including osteosarcoma. In the present study, we evaluated the specificity and practicality of FGF23 immunoreactivity as a specific diagnostic tool to differentiate UPSb tumours from osteosarcomas and dedifferentiated chondrosarcomas. Methods: A total of 10 UPSb, 10 osteosarcoma, and 10 dedifferentiated chondrosarcoma cases (all high-grade), were retrieved and immunohistochemistry for FGF23 was performed. Results: FGF23 protein was expressed at high levels in 80-90% of undifferentiated pleomorphic sarcoma of the bone cases, whereas it was expressed at significantly lower levels in dedifferentiated chondrosarcoma and osteosarcoma cases. A semiquantitative analysis, considering the intensity of immunoreactivity, confirmed significantly elevated FGF23 expression levels in UPSb tissues compared to those observed in osteosarcoma and dedifferentiated chondrosarcoma tissues. Conclusions: The results we present here suggest that FGF23 immunohistochemistry may be a useful tool to aid in differentiating UPSb from morphologically similar malignant bone sarcomas, especially in situations where sampling is restricted and there is limited clinical information available.


Assuntos
Neoplasias Ósseas , Condrossarcoma , Fator de Crescimento de Fibroblastos 23 , Osteossarcoma , Sarcoma , Humanos , Neoplasias Ósseas/diagnóstico , Neoplasias Ósseas/genética , Condrossarcoma/diagnóstico , Condrossarcoma/genética , Condrossarcoma/metabolismo , Osteossarcoma/diagnóstico , Osteossarcoma/genética , Sarcoma/diagnóstico , Sarcoma/genética , Sarcoma/patologia , Fator de Crescimento de Fibroblastos 23/metabolismo
2.
Clin Med (Lond) ; 23(6): 630-632, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-38065599

RESUMO

Despite its recognition as an 'ANCA-associated vasculitis' (AAV), eosinophilic granulomatosis with polyangiitis (EGPA) is ANCA negative in up to 60% of cases. Herein, we report the case of a young man with a clinical syndrome highly suggestive of EGPA but with repeated negative ANCA serology, ultimately presenting with cardiac arrest before recognition of the primary systemic vasculitis, whereupon he received successful induction therapy with high dose glucocorticoids and cyclophosphamide. The case illustrates the importance of awareness of ANCA negative AAV among general physicians in order to minimise morbidity and mortality.


Assuntos
Vasculite Associada a Anticorpo Anticitoplasma de Neutrófilos , Síndrome de Churg-Strauss , Granulomatose com Poliangiite , Masculino , Humanos , Granulomatose com Poliangiite/diagnóstico , Granulomatose com Poliangiite/tratamento farmacológico , Anticorpos Anticitoplasma de Neutrófilos/uso terapêutico , Síndrome de Churg-Strauss/diagnóstico , Síndrome de Churg-Strauss/tratamento farmacológico , Vasculite Associada a Anticorpo Anticitoplasma de Neutrófilos/diagnóstico , Vasculite Associada a Anticorpo Anticitoplasma de Neutrófilos/tratamento farmacológico , Ciclofosfamida/uso terapêutico
3.
Proc Natl Acad Sci U S A ; 120(35): e2307772120, 2023 08 29.
Artigo em Inglês | MEDLINE | ID: mdl-37603747

RESUMO

Artificial cells are biomimetic structures formed from molecular building blocks that replicate biological processes, behaviors, and architectures. Of these building blocks, hydrogels have emerged as ideal, yet underutilized candidates to provide a gel-like chassis in which to incorporate both biological and nonbiological componentry which enables the replication of cellular functionality. Here, we demonstrate a microfluidic strategy to assemble biocompatible cell-sized hydrogel-based artificial cells with a variety of different embedded functional subcompartments, which act as engineered synthetic organelles. The organelles enable the recreation of increasingly biomimetic behaviors, including stimulus-induced motility, content release through activation of membrane-associated proteins, and enzymatic communication with surrounding bioinspired compartments. In this way, we showcase a foundational strategy for the bottom-up construction of hydrogel-based artificial cell microsystems which replicate fundamental cellular behaviors, paving the way for the construction of next-generation biotechnological devices.


Assuntos
Células Artificiais , Biomimética , Hidrogéis , Comunicação , Organelas
5.
Chem Sci ; 12(36): 12156-12164, 2021 Sep 22.
Artigo em Inglês | MEDLINE | ID: mdl-34667581

RESUMO

To achieve spatial resolution of a multi-component gel, a double diffusion approach is used which enables the precise programming of self-assembled patterned domains with well-defined shapes and sizes. The low-molecular-weight gelators (LMWGs) used in this study are pH-responsive DBS-CO2H and thermally-responsive DBS-CONHNH2 (both based on 1,3:2,4-dibenzylidenesorbitol, DBS). A DBS-CONHNH2 gel was initially assembled in a tray, and then loaded at carefully-selected positions with either basified DBS-CO2H (i.e. DBS-carboxylate) or an acid. These soluble components subsequently diffuse through the pre-formed gel matrix, and in the domains when/where they mix, protonation of the DBS-carboxylate induces self-assembly of the DBS-CO2H network, leading to a patterned gel-in-gel object with well-defined shape and dimensions. Using a strong acid achieves fast gelation kinetics, creating smaller, better-defined macroscale objects but with less nanoscale order. Using a weak acid source with slow kinetics, gives slightly larger objects, but on the nanoscale the DBS-CO2H network formation is better controlled, giving more homogeneous nanoscale structures and stiffer objects. The patterned objects can be further reinforced by the presence of agarose polymer gelator. The shape of the patterning is programmed by both the shape of the central reservoir and the starting geometry in which the reservoirs are organised, with the balance between factors depending on assembly kinetics, as dictated by the choice of acid. This simple methodology therefore enables programming of patterned gels with spatiotemporal control and emergent patterning characteristics.

6.
Int J Nurs Stud ; 113: 103792, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-33120135

RESUMO

OBJECTIVES: To identify newly qualified nurses' experiences during transition to professional practice, and explore their and other key stakeholders' perceptions of nursing transition programmes. DESIGN: Scoping review using the Arksey and O'Malley framework. METHODS: Several electronic databases were searched for relevant articles, which were supplemented by hand-searching and internet searches for grey literature. 1823 potentially relevant articles published between 1974 and 2019 were retrieved from the initial search, and an additional ten articles were obtained from the supplemental search. Each article was independently reviewed, leaving 60 articles eligible for inclusion in the review. FINDINGS: Two overarching themes emerged: 1) the transition experience; 2) the perceived benefits of nursing transition programmes. Evidence that nursing transition programmes positively impact the transition experience is inconclusive. Some studies suggest a positive impact on newly qualified nurses' competency, level of confidence and attrition rates; others reported no impact. There was a general consensus that newly qualified nurses still encounter difficulties when transitioning into professional practice. Most articles found were quantitative in nature, focusing on measurable outcomes of nursing transition programmes. Few investigated the experiences and perceptions of newly qualified nurses, preceptors, and managers regarding the transition to professional practice. CONCLUSIONS: Literature mapping suggests that newly qualified nurses frequently struggle to successfully complete the transition into professional practice, and that this transition is complex and multifaceted. There is limited evidence to justify the widespread implementation of nursing transition programmes. Additional research focusing on experiences and perceptions of newly qualified nurses and their transitory process is warranted. Tweetable abstract: Are newly qualified nurses receiving sufficient transition support (e.g. #nursing residency programs or #preceptorship)? #Nurse #Nurses #nursing_intern.


Assuntos
Enfermeiras e Enfermeiros , Preceptoria , Competência Clínica , Humanos
7.
Int J Nurs Stud ; 52(11): 1723-34, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26164747

RESUMO

BACKGROUND: Studies have demonstrated that the transition experience of new graduate nurses is complex and frequently negative, leading to dissatisfaction with nursing and increased attrition. Existing studies of new graduate nurses' transition experiences tend to be concerned with the experiences of new graduate nurses in the West. To date, no study has been conducted examining the transition experience in any Middle Eastern country where the cultural context surrounding nursing education and practice is different. AIM: To explore the experiences of new graduate nurses during their transition period in the Sultanate of Oman. METHOD: A qualitative case study utilising an embedded single case design was conducted to investigate the transition experience of new nursing graduates from one university in the Sultanate of Oman. Data were collected from the perspective of new graduate nurses and also from the perspective of other key informants who are key organisational actors such as clinical instructors, managers and preceptors. As is characteristic of case study design, this study employed triangulated methods including individual and focus group interviews, observation and documentary analysis. Data collected were thematically analysed using Microsoft Access. RESULTS: This study showed that nursing is not an attractive choice for Omani students to study and pursue as a future career. During the transition period, new graduate nurses experienced reality shock resulting mainly from a theory-practice gap. They found themselves with limited practical experience but a high level of theoretical knowledge that was difficult to utilise in practice. They experienced many competing priorities in their working environment which resulted in task-orientation and compromised patient care. Many new graduate nurses resented their involvement in basic nursing care, which they believed should not be part of their role as degree nurses. CONCLUSION: Omani new graduate nurses' transition experiences are complex and highly affected by the working conditions and the status of nursing in Oman. Basic nursing care was believed by new graduate nurses to negatively affect the status of nursing.


Assuntos
Enfermagem/tendências , Educação em Enfermagem/normas , Entrevistas como Assunto , Papel do Profissional de Enfermagem , Omã , Prática Profissional/tendências
8.
J Nurs Manag ; 17(2): 256-64, 2009 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-19416430

RESUMO

AIM: The aim of this paper is to review key theories of risk and safety and their implications for nursing. BACKGROUND: The concept of of patient safety has only recently risen to prominence as an organising principle in healthcare. The paper considers the wider social context in which contemporary concepts of risk and safety have developed. In particular it looks at sociological debates about the rise of risk culture and the risk society and their influence on the patient safety movement. KEY ISSUES: The paper discusses three bodies of theory which have attempted to explain the management of risk and safety in organisations: normal accident theory, high reliability theory, and grid-group cultural theory. It examine debates between these theories and their implications for healthcare. It discusses reasons for the dominance of high reliability theory in healthcare and its strengths and limitations. CONCLUSION: The paper suggest that high reliability theory has particular difficulties in explaining some aspects of organisational culture. It also suggest that the implementation of high reliability theory in healthcare has involved over reliance on numerical indicators. It suggests that patient safety could be improved by openness to a wider range of theoretical perspectives.


Assuntos
Modelos Teóricos , Enfermagem , Gestão de Riscos , Humanos , Recursos Humanos de Enfermagem/organização & administração , Cultura Organizacional , Gestão de Riscos/organização & administração
9.
Nurse Educ Pract ; 8(4): 239-48, 2008 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-17945535

RESUMO

This study explored patient safety in an English pre-registration nursing curriculum. The need to improve patient safety has been recognised as a key priority, both nationally and internationally. Education has a crucial role in developing the knowledge, skills and attitudes that promote patient safety. However, evidence about how patient safety is addressed in healthcare professional curricula and how organisations develop safe practitioners is limited. An organisational case study identified factors affecting patient safety educational provision. Content analysis revealed what aspects of patient safety featured in the formal pre-registration nursing curriculum. Interviews were conducted with students, lecturers and key education stakeholders from various levels of the educational organisation, to explore their perceptions of patient safety and its location in the curriculum and practice. Patient safety was not explicit in the formal curriculum, but was included in teaching. Students reported gaining most knowledge and experience from clinical practice. The organisational culture of both education and practice was characterised as defensive and closed, and as having an individual versus a systems approach. Findings suggest the need for clarification of the concept of patient safety, as well as revision of curricula and teaching, learning and assessment strategies in order to address patient safety explicitly.


Assuntos
Currículo , Bacharelado em Enfermagem/métodos , Gestão da Segurança/métodos , Competência Clínica/normas , Educação Baseada em Competências/métodos , Educação Baseada em Competências/normas , Bacharelado em Enfermagem/normas , Inglaterra , Conhecimentos, Atitudes e Prática em Saúde , Humanos , Erros Médicos/prevenção & controle , Estudos de Casos Organizacionais , Cultura Organizacional , Gestão da Segurança/normas
10.
Nurse Educ Today ; 27(3): 177-84, 2007 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-17257712

RESUMO

This paper considers the theories of scapegoating and their application to nursing. It reviews the literature on scapegoating drawing particular attention to those studies which have emphasised on the instrumental uses of scapegoating in organisational contexts. The paper draws on data from a qualitative study of the identification and management of the 'problem' nurse conducted in three healthcare Trusts. It describes a number of illustrative cases in which different types of scapegoating occurred. The paper argues that scapegoating is an ethical challenge which nurses must face.


Assuntos
Atitude do Pessoal de Saúde , Relações Interprofissionais , Recursos Humanos de Enfermagem no Hospital/psicologia , Bode Expiatório , Adaptação Psicológica , Competência Clínica , Conflito Psicológico , Disciplina no Trabalho , Inglaterra , Hostilidade , Humanos , Julgamento , Negativismo , Enfermeiras Administradoras/organização & administração , Enfermeiras Administradoras/psicologia , Papel do Profissional de Enfermagem/psicologia , Pesquisa Metodológica em Enfermagem , Recursos Humanos de Enfermagem no Hospital/organização & administração , Poder Psicológico , Teoria Psicanalítica , Teoria Psicológica , Pesquisa Qualitativa , Estereotipagem , Inquéritos e Questionários
11.
Int J Nurs Stud ; 43(8): 975-84, 2006 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-16360158

RESUMO

BACKGROUND: Quality assurance has acquired increasing prominence in contemporary healthcare systems and there has been an 'explosion' of audit activity. Some authors have begun to investigate the impact of audit activity on organisational and professional cultures. This paper considers data from a wider study of the management of the 'problem' nurse. Nurses and managers had contrasting perceptions of the value of different methods of assessing ward standards and their views are presented here. DESIGN AND SETTING: The study involved organisational case studies in three healthcare Trusts in the north of England. The fieldwork for this study was funded by the United Kingdom Central Council for Nursing, Midwifery and Health Visiting under their research scholarship programme. METHODS: Multiple methods were employed including observation, interviewing and documentary analysis. A total of 144 informal interviews were carried out with ward nurses and their managers. FINDINGS: The study demonstrated different viewpoints regarding the surveillance of nursing standards at top management, middle management and ward levels. The paper considers the discrepancies between these different viewpoints. CONCLUSION: None of the participants placed a high value on audit as a method of assessing ward standards. Complaints data and informal methods were more highly valued by managers. Ward nurses stressed the importance of presence and vigilance in assuring high standards of nursing care.


Assuntos
Atitude do Pessoal de Saúde , Enfermeiras Administradoras/psicologia , Auditoria de Enfermagem/organização & administração , Recursos Humanos de Enfermagem no Hospital/psicologia , Garantia da Qualidade dos Cuidados de Saúde/organização & administração , Conflito Psicológico , Inglaterra , Fidelidade a Diretrizes/normas , Humanos , Relações Interprofissionais , Enfermeiras Administradoras/organização & administração , Papel do Profissional de Enfermagem/psicologia , Pesquisa Metodológica em Enfermagem , Recursos Humanos de Enfermagem no Hospital/organização & administração , Supervisão de Enfermagem/organização & administração , Estudos de Casos Organizacionais , Cultura Organizacional , Objetivos Organizacionais , Guias de Prática Clínica como Assunto , Valores Sociais , Medicina Estatal/organização & administração , Inquéritos e Questionários
12.
Nurse Educ Today ; 25(4): 333-40, 2005 May.
Artigo em Inglês | MEDLINE | ID: mdl-15896418

RESUMO

In this literature review, we examine to what extent patient safety is addressed within medical and nursing curricula. Patient safety is the foundation of healthcare practice and education both in the UK and internationally. Recent research and policy initiatives have highlighted this issue. The paper highlights the significance of this topic as an aspect of study in its own right by examining not only the fiscal but also the human costs such events invite. In the United Kingdom patient safety issues feature prominently in the (Department of Health, 2000a. An organisation with a memory. The report of an expert group on learning from adverse events. The Stationery Office, London, Department of Health, 2000b. Handling complaints: monitoring the NHS complaints procedures (England, Financial year 1998-99). The Stationery Office, London.) policy documentation but this is not reflected within the formal curricula guidelines issued by the NMC and GMC. Yet if healthcare educational curricula were to recognise the value of learning from errors, such events could become part of a wider educational resource enabling both students and facilitators to prevent threats to patient safety. For this reason, the paper attempts to articulate why patient safety should be afforded greater prominence within medical and nursing curricula. We argue that learning how to manage errors effectively would enable trainee practitioners to improve patient care, reduce the burden on an overstretched health care system and engage in dynamic as opposed to defensive practice.


Assuntos
Currículo/normas , Educação de Graduação em Medicina/normas , Bacharelado em Enfermagem/normas , Erros Médicos/prevenção & controle , Gestão da Segurança/organização & administração , Competência Clínica/normas , Guias como Assunto , Política de Saúde , Humanos , Erros Médicos/estatística & dados numéricos , Determinação de Necessidades de Cuidados de Saúde , Pesquisa em Educação de Enfermagem , Medição de Risco , Medicina Estatal/organização & administração , Reino Unido
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...