668 research outputs found

    Effectiveness of appropriately trained nurses in preoperative assessment: randomised controlled equivalence/non-inferiority trial

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    Objective To determine whether preoperative assessments carried out by appropriately trained nurses are inferior in quality to those carried out by preregistration house officers. Design Randomised controlled equivalence/non-inferiority trial. Setting Four NHS hospitals in three trusts. Three of the four were teaching hospitals. Participants All patients attending for assessment before general anaesthesia for general, vascular, urological, or breast surgery between April 1998 and March 1999. Intervention Assessment by one of three appropriately trained nurses or by one of several preregistration house officers. Main outcome measures History taken, physical examination, and investigations ordered. Measures evaluated by a specialist registrar in anaesthetics and placed in four categories: correct, overassessment, underassessment not affecting management, and underassessment possibly affecting management (primary outcome). Results 1907 patients were randomised, and 1874 completed the study; 926 were assessed by house officers and 948 by nurses. Overall 121/948 (13%) assessments carried out by nurses were judged to have possibly affected management compared with 138/926 (15%) of those performed by house officers. Nurses were judged to be non-inferior to house officers in assessment, although there was variation among them in terms of the quality of history taking. The house officers ordered considerably more unnecessary tests than the nurses (218/926 (24%) v 129/948 (14%). Conclusions There is no reason to inhibit the development of nurse led preoperative assessment provided that the nurses involved receive adequate training. However, house officers will continue to require experience in preoperative assessment

    The Vasoactive Potential of Kisspeptin-10 in the Peripheral Vasculature

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    Splice products of the Kiss1 protein (kisspeptins) have been shown to be involved in a diverse range of functions, including puberty, metastasis and vasoconstriction in large human arteries. Circulating Kisspeptin-10 (Kp-10) plasma levels are low in normal individuals but are elevated during various disease states as well as pregnancy. Here, we investigated the potential of Kp-10, the shortest biologically active kisspeptin, to influence microvascular effects, concentrating on the cutaneous vasculature. Kp-10 caused a dose-dependent increase in oedema formation (0.3–10nmol/injection site), assessed by Evans Blue albumin dye extravasation, in the dorsal skin of CD1 mice. Oedema formation was shown to be inhibited by the histamine H1 receptor antagonist mepyramine. The response was characterised by a ring of pallor at the injection site in keeping with vasoconstrictor activity. Therefore, changes in dorsal skin blood flow were assessed by clearance of intradermally injected 99mtechnetium. Kp-10 was found to significantly reduce clearance, in keeping with decreased blood flow and providing further evidence for vasoconstrictor activity. The decreased clearance was partially inhibited by co-treatment with the cyclo-oxygenase inhibitor indomethacin. Finally evidence for the kisspeptin receptor gene (Kiss1R), but not the kisspeptin peptide gene (Kiss1), mRNA expression was observed in heart, aorta and kidney samples from normal and angiotensin II induced hypertensive mice, with similar mRNA levels observed in each. We have evidence for two peripheral vasoactive roles for kisspeptin-10. Firstly, plasma extravasation indicative of ability to induce oedema formation and secondly decreased peripheral blood flow, indicating microvascular constriction. Thus Kp-10 has vasoactive properties in the peripheral microvasculature

    Cardiac Influence on Mechanical Ventilation Time and Mortality in Exacerbated Chronic Respiratory Failure Patients. The Role of Echocardiographic Parameters

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    Objectivo: estudar determinantes cardiovasculares condicionantes do tempo de ventilação, mortalidade e gravidade de doença em doentes admitidos numa unidade de cuidados intensivos para ventilação mecânica por exacerbação de insuficiência respiratória crónica. Desenho e local: Estudo prospectivo, com duração de 30 meses numa unidade de cuidados intensivos médico-cirúrgica com 14 camas.Material e métodos: Estudados 59 doentes com idade média de 74,7 +/- 9,7 anos, tempo médio de ventilação de 10,8 +/- 12,6 dias, APACHE II médio de 23 +/- 8,3. Avaliaram-se parâmetros ecocardiográficos (dimensões das cavidades, débito cardíaco, estudo Doppler do fluxo transvalvular mitral, estudo da veia cava inferior) e electrocardiográficos(presença de ritmo sinusal ou fibrilhação auricular) nas primeiras 24 horas de internamento na Unidade e parâmetros gasimétricos à saída. Resultados: Um tempo de ventilação mais prolongado associou-se à presença de fibrilhação auricular (p=0,027), à presença conjunta de fibrilhação auricular e uma veia cava inferior dilatada (> 20mm p=0,004) e com níveis séricos de bicarbonato> 35mEq/l na gasimetria obtida à saída (p=0,04). Verificaram-se 12 óbitos. A mortalidade associou-se à presença de dilatação do ventrículo direito (p=0,03) e a uma relação entre o ventrículo direito e o esquerdo> 0,6 (p=0,04). Conclusão: Nos doentes submetidos a ventilação mecânica por exacerbação de insuficiência respiratória crónica, a presença de fibrilhação auricular indica a possibilidade de um período de ventilação mais prolongado, em especial se houver concomitantemente uma veia cava inferior com diâmetro> 20mm. Nestes doentes, a presença de dilatação das cavidades direitas pode indicar uma probabilidade mais elevada de mortalidade

    Development of forest structure and leaf area in secondary forests regenerating on abandoned pastures in Central Amazonia

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    The area of secondary forest (SF) regenerating from pastures is increasing in the Amazon basin; however, the return of forest and canopy structure following abandonment is not well understood. This study examined the development of leaf area index (LAI), canopy cover, aboveground biomass, stem density, diameter at breast height (DBH), and basal area ( BA) by growth form and diameter class for 10 SFs regenerating from abandoned pastures. Biomass accrual was tree dominated, constituting >= 94% of the total measured biomass in all forests abandoned >= 4 to 6 yr. Vine biomass increased with forest age, but its relative contribution to total biomass decreased with time. The forests were dominated by the tree Vismia spp. (> 50%). Tree stem density peaked after 6 to 8 yr ( 10 320 stems per hectare) before declining by 42% in the 12- to 14-yr-old SFs. Small-diameter tree stems in the 1-5-cm size class composed > 58% of the total stems for all forests. After 12 to 14 yr, there was no significant leaf area below 150-cm height. Leaf area return (LAI = 3.2 after 12 to 14 yr) relative to biomass was slower than literature-reported recovery following slash-and-burn, where LAI can reach primary forest levels ( LAI = 4 - 6) in 5 yr. After 12 to 14 yr, the colonizing vegetation returned some components of forest structure to values reported for primary forest. Basal area and LAI were 50% - 60%, canopy cover and stem density were nearly 100%, and the rapid tree-dominated biomass accrual was 25% - 50% of values reported for primary forest. Biomass accumulation may reach an asymptote earlier than expected because of even-aged, monospecific, untiered stand structure. The very slow leaf area accumulation relative to biomass and to reported values for recovery following slash-and-burn indicates a different canopy development pathway that warrants further investigation of causes ( e. g., nutrient limitations, competition) and effects on processes such as evapotranspiration and soil water uptake, which would influence long-term recovery rates and have regional implications

    Atuação em um grupo interdisciplinar de cuidado de pessoas com feridas:: um relato de experiência

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    Trata de um relato de experiência que contempla o cotidiano de duas enfermeiras atuantes em uma clínica cirúrgica do Hospital Universitário da Universidade Federal de Santa Catarina, enquanto pertencentes ao Grupo Interdisciplinar de Cuidados de Pessoas com Feridas (GICPF). Tem como objetivo divulgar o GICPF e a vivência diária na assistência a pessoas com feridas. O grupo destina-se a planejar, disseminar conhecimentos e assistir pessoas com feridas contribuindo para melhorar a qualidade de vida e reduzir o tempo de internação. Através da participação no Grupo verificou-se maior aceitação às novas terapias tópicas, ampliando a concepção do cuidado de pessoas com ferida

    Mental disorders in judicial workers: analysis of sickness absence in a cohort study

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    OBJECTIVE: To analyze risk factors for sickness absence due to mental disorders among judicial workers in Bahia, Brazil. METHODS: Retrospective cohort with follow-up from 2011 to 2016 with 2,660 workers of a judicial sector in Bahia, Brazil. The main outcome measures were survival curves estimated for the independent variables using the Kaplan-Meier product limit estimator and risk factors for the first episode of sickness absence calculated based on the Cox regression model. RESULTS: The survival estimate of the population of this study for the event was 0.90 and from the Cox model the risk factors for the first episode of sickness absence due to mental disorders were: female (HR = 1.81), occupation of magistrate (HR = 1.80), and age over 30 years old (HR = 1.84). In addition, the risk for new cases of sickness absence among women reached 4.0 times the risk for men, in 2015. The estimated relative risks of sickness absence and the observed survival reduction behavior over time add information to the literature on sociodemographic and occupational factors associated with sickness absence due to mental disorders in the public sector. CONCLUSION: These results highlight the need for further research to more precisely identify vulnerable groups at risk of preventable mental health-related sickness absence in the workplace, better identify the workplace organizational factors that contribute to these disorders as well as studies on the effectiveness of workplace interventions to improve mental health among judicial and other public sectors workers
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