Absenteísmo por covid-19 em profissionais de enfermagem de unidade de terapia intensiva / Absenteeism due to covid-19 in nursing professionals in the intensive care unit / Ausentismo debido al covid-19 em profesionales de enfermería en la unidad de cuidados intensivos

Objetivo: Identificar as variáveis associadas ao absenteísmo por covid-19 avaliando a Qualidade de Vida no Trabalho dos profissionais de enfermagem da Unidade de Terapia Intensiva de um hospital público. Métodos: Estudo de abordagem quantitativa, observacional e retrospectivo, realizada na Unidade de Terapia Intensiva de um hospital público estadual em Manaus, aplicado dois questionários para a coleta de dados. Resultados: O absenteísmo teve influência das seguintes variáveis: técnicos de enfermagem (100%); dois vínculos empregatícios (64%); especialização nível médio ou pós-técnico (50%); renda até dois salários-mínimos (73,9%). Conclusão: Este estudo visa contribuir para o avanço do conhecimento científico por meio das relações entre o absenteísmo e a Covid-19 e, através do índice de Qualidade de Vida busca ajudar na criação de melhorias para a classe da enfermagem e de aspectos organizacionais. (AU)

Objective: To identify the variables associated with absenteeism by covid-19 evaluating the Quality of Life at Work of nursing professionals in the Intensive Care Unit of a public hospital. Methods: A quantitative, observational and retrospective study. The research was carried out in the Intensive Care Unit of a public hospital in Manaus, where two questionnaires were applied for data collection. Results: The absenteeism was influenced by the following variables: nursing technicians (100%); two jobs (64%); medium or post-technical specialization (50%); income up to two minimum wages (73.9%). Conclusion: This study aims to contribute to the advancement of scientific knowledge through the relationship between absenteeism and Covid-19 and, through the Quality of Life index, seeks to help create improvements for the nursing class and organizational aspects. (AU)

Objetivo: Identificar las variables asociadas al absentismo por covid-19 evaluando la Calidad de Vida Laboral de los profesionales de enfermería de la Unidad de Cuidados Intensivos de un hospital público. Métodos: Estudio cuantitativo, observacional y retrospectivo. La investigación se realizó en la Unidad de Cuidados Intensivos de un hospital público de Manaus, donde se aplicaron dos cuestionarios para la recogida de datos. Resultados: En el absentismo influyeron las siguientes variables: técnicos de enfermería (100%); dos empleos (64%); especialización media o postécnica (50%); ingresos de hasta dos salarios mínimos (73,9%). Conclusión: Este estudio pretende contribuir al avance del conocimiento científico a través de la relación entre el absentismo y el Covid-19 y, a través del índice de Calidad de Vida, busca ayudar en la creación de mejoras para la clase de enfermería y los aspectos organizativos. (AU)

Histomorphometric evaluation of strontium-containing nanostructured hydroxyapatite as bone substitute in sheep

Abstract The aim of this study is to evaluate the biocompatibility and osteoconductivity in surgical defects of sheep tibias filled with 1% strontium-containing nanostructured hydroxyapatite microspheres (SrHA), stoichiometric hydroxyapatite without strontium microspheres (HA), or blood clots. Santa Ines sheep were subjected to three perforations on the medial side of the left tibia. The biomaterials were characterized by X-ray Diffraction (XRD) and Fourier Transform Infrared (FTIR) before implantation and by X-Ray Microfluorescence (µFRX) and Scanning Electron Microscopy (SEM) after sheep tibias implantation. Surgical defects were filled with blood clots (control), SrHA (Group 1) or HA (Group 2). After 30 days, 5-µm bone blocks were obtained for histological evaluation, and the blocks obtained from 1 animal were embedded in methylmethacrylate for undecalcified sections. Mononuclear inflammatory infiltrate remained mild in all experimental groups. Giant cells were observed surrounding biomaterials particles of both groups and areas of bone formation were detected in close contact with biomaterials. All groups showed newly formed bone from the periphery to the center of the defects, which the control, HA and SrHA presented 36.4% (± 21.8), 31.2% (± 14.7) and 26.2% (± 12.9) of newly formed bone density, respectively, not presenting statistical differences. In addition, the connective tissue density did not show any significant between groups. The SrHA showing a higher volume density of biomaterial (51.2 ± 14.1) present in the defect compared to HA (32.6 ± 8.5) after 30 days (p = 0.03). Microspheres containing 1% SrHA or HA can be considered biocompatible, have osteoconductive properties and may be useful biomaterials for clinical applications.

Influence of estrogen deficiency and tibolone therapy on trabecular and cortical bone evaluated by computed radiography system in rats / Influência da deficiência estrogênica e do tratamento com tibolona no osso trabecular e cortical avaliada pelo sistema de radiografia computadorizada em ratas

PURPOSE: To verify the effects of tibolone administration on trabecular and cortical bone of ovariectomized female rats by computed radiography system (CRS). METHODS: The experiment was performed on two groups of rats previously ovariectomized, one received tibolone (OVX+T) while the other did not (OVX), those groups were compared to a control group (C) not ovariectomized. Tibolone administration (1mg/day) began thirty days after the ovariectomy and the treatment remained for five months. At last, the animals were euthanized and femurs and tibias collected. Computed radiographies of the bones were obtained and the digital images were used to determine the bone optical density and cortical thickness on every group. All results were statistically evaluated with significance set at P<0.05 percent. RESULTS: Tibolone administration was shown to be beneficial only in the densitometric analysis of the femoral head, performing higher optical density compared to OVX. No difference was found in cortical bone thickness. CONCLUSION: Ovariectomy caused bone loss in the analyzed regions and tibolone administered in high doses over a long period showed not to be fully beneficial, but preserved bone mass in the femoral head.

OBJETIVO: Verificar o efeito da administração de tibolona no tecido ósseo cortical e trabecular de ratas castradas através de radiografia computadorizada. MÉTODOS: O experimento foi realizado em dois grupos de ratas previamente ooforectomizadas, onde um grupo recebeu tibolona (OVX+T) e o outro não (OVX). Esses grupos foram comparados a um grupo controle (C) não ooforectomizado. A administração de tibolona (1mg/dia) começou trinta dias após a ooforectomia e o tratamento teve duração de cinco meses. No final, os animais foram mortos e fêmures e tibias coletados. As radiografias computadorizadas dos ossos foram obtidas e as imagens digitais usadas para determinar a densidade óssea e a espessura cortical em todos os grupos. Todos os resultados foram avaliados estatisticamente com significância estabelecida a 5 por cento. RESULTADOS: A administração de tibolona mostrou ser benéfica apenas para análise densitométrica da cabeça do fêmur, apresentando maiores valores de densidade comparada ao grupo OVX. Nenhuma diferença significativa foi encontrada para espessura óssea cortical. CONCLUSÃO: A ooforectomia ocasionou perda óssea nas regiões analisadas e a tibolona administrada, em dose elevada e durante um longo período, mostrou não ser totalmente benéfica, porém preservou a massa óssea na cabeça femoral.