Nursing Interventions to Empower Family Caregivers to Manage the Risk of Falling in Older Adults: A Scoping Review.

Falls pose a significant risk to older adults, resulting in injuries and declining quality of life. The psychological impact, particularly the fear of falling, impairs their well-being. This pervasive fear affects daily activities, leading to self-imposed limitations and reduced engagement. This review aimed to identify nursing interventions to empower family caregivers to manage the risk of falling in older adults. A scoping review was developed following the JBI framework. We searched the CINAHL, MEDLINE, Nursing & Allied Health Collection, Cochrane Central Register of Controlled Trials, MedicLatina, and Cochrane Database of Systematic Reviews. The findings of this review revealed that out of 460 initially identified records, nine articles met the eligibility criteria and were retained for further in-depth analysis. These articles provided insights into nine distinct categories of nurse interventions: Therapeutic Relationships, Family Involvement, Personalized Care, Health Education, Multifactorial Falls Risk Assessment, Home Modifications, Referral, Transition Between Healthcare Services, and Health Care Consultants. The findings of this review have significant implications for clinical practice, particularly in emphasizing the crucial role of nurses in empowering family caregivers and older adults to manage the risk of falling at home. Healthcare professionals, policymakers, and researchers can benefit from this informative resource to develop strategies and guidelines.

A state-of-the-science review of analytical methods for urinary dialkylphosphate metabolites in the assessment of exposure to organophosphate pesticides: From 2000 to 2022.

The general population and workers are exposed to organophosphate insecticides, one of the leading chemical classes of pesticides used in rural and urban areas. This paper aims to conduct an integrative review of the most used analytical methods for identifying and quantifying dialkylphosphate-which are metabolites of organophosphate insecticides-in the urine of exposed workers, discussing their advantages, limitations and applicability. Searches utilized the PubMed, the Scientific Electronic Library Online and the Brazilian Digital Library of Theses and Dissertations databases between 2000 and 2021. Twenty-five studies were selected. The extraction methods most used were liquid-liquid extraction (LLE) (36%) and solid-phase extraction (SPE) (36%), with the SPE being more economical in terms of time and amount of solvents needed, and presenting the best percentage of recovery of analytes, when compared with LLE. Nineteen studies (76%) used the gas chromatography method of separation, and among these, 12 records (63%) indicated mass spectrometry used as a detection technology (analyzer). Studies demonstrate that dialkylphosphates are sensitive and representative exposure biomarkers for environmental and occupational organophosphate exposure.

Urinary dialkylphosphate metabolites in the assessment of exposure to organophosphate pesticides: from 2000 to 2022.

The general population and workers are exposed to organophosphate insecticides, one of the leading chemical classes of pesticides used in rural and urban areas, in the control of arboviruses and agriculture. These pesticides cause environmental/occupational exposure and associated risks to human and environmental health. The objective of this study was to carry out an integrative review of epidemiological studies that identified and quantified dialkylphosphate metabolites in the urine of exposed populations, focusing on the vector control workers, discussing the application and the results found. Searches utilized the Pubmed, Scielo, and the Brazilian Digital Library of Theses and Dissertations (BDTD) databases between 2000 and 2021. From the 194 selected studies, 75 (39%) were with children/adolescents, 48 (24%) with rural workers, 36 (19%) with the general population, 27 (14%) with pregnant women, and 9 (4%) with vector control workers. The total dialkylphosphate concentrations found in the occupationally exposed population were higher than in the general population. Studies demonstrate that dialkylphosphates are sensitive and representative exposure biomarkers for environmental and occupational organophosphate exposure. The work revealed a lack of studies with vector control workers and a lack of studies in developing countries.

Tempo de transição alimentar e método de alimentação na alta hospitalar de prematuros com displasia broncopulmonar / Feeding transition time and feeding method at hospital discharge of preterm infants with bronchopulmonary dysplasia

RESUMO Objetivo Comparar o tempo de transição alimentar e a forma de alimentação por via oral na alta hospitalar, entre recém-nascidos prematuros com diagnóstico de displasia broncopulmonar e prematuros sem o diagnóstico. Métodos Estudo transversal, retrospectivo com base na coleta de dados nos prontuários. Foram coletados dados de 78 recém-nascidos, em uma maternidade de referência. A amostra foi estratificada em dois grupos, de acordo com a presença do diagnóstico de displasia broncopulmonar, sendo um grupo de prematuros com displasia broncopulmonar e outro sem. Foram analisados o tempo de transição alimentar e o método de alimentação na alta hospitalar de ambos os grupos. Resultados Houve diferença significativa no tempo de transição alimentar e no método de alimentação na alta hospitalar entre os grupos. Os recém-nascidos pré-termo com displasia broncopulmonar apresentaram média de 18,03 (± 5,5) dias de transição e saíram em uso de mamadeira. Conclusão O grupo com displasia broncopulmonar necessitou de maior tempo de transição alimentar e teve menor frequência de aleitamento materno exclusivo, em relação ao grupo sem o diagnóstico.

ABSTRACT Purpose To compare the time of food transition and the form of oral feeding at hospital discharge, between premature newborns diagnosed with bronchopulmonary dysplasia and premature newborns without the diagnosis. Methods Cross-sectional, retrospective study based on data collection from medical records. Data were collected from 78 newborns, in a reference maternity hospital, in which the sample was stratified into two groups according to the presence or absence of the diagnosis of bronchopulmonary dysplasia. The time of food transition and the feeding method at hospital discharge were analyzed for both groups. Results There was a significant difference in the time of food transition and in the feeding method at hospital discharge between the groups. Preterm newborns with bronchopulmonary dysplasia had an average of 18.03 (± 5.5) transition days and left using a bottle. Conclusion The group with bronchopulmonary dysplasia required a longer time of food transition and fewer ( of its ) infants had exclusive breastfeeding compared to the group without the diagnosis.

Risk factors for acute kidney injury after liver transplantation in intensive care unit: a retrospective cohort study.

BACKGROUND: Acute kidney injury (AKI) is a frequent complication during the postoperative period following liver transplantation. Occurrence of AKI in intensive care unit (ICU) patients is associated with increased mortality and higher costs. OBJECTIVE: To evaluate occurrences of moderate or severe AKI among patients admitted to the ICU after liver transplantation and investigate characteristics associated with this complication. DESIGN AND SETTING: Single-center retrospective cohort study in a public hospital, Belo Horizonte, Brazil. METHODS: Forty-nine patients admitted to the ICU between January 2015 and April 2017 were included. AKI was defined from a modified Kidney Disease Improving Global Outcomes (KDIGO) score (i.e. based exclusively on serum creatinine levels). RESULTS: Eighteen patients (36.7%) developed AKI KDIGO 2 or 3; mostly KDIGO 3 (16 out of the 18 patients). Lactate level within the first six hours after ICU admission (odds ratio, OR: 1.3; 95% confidence interval, CI: 1.021-1.717; P = 0.034) and blood transfusion requirement within the first week following transplantation (OR: 8.4; 95% CI: 1.687-41.824; P = 0.009) were independently associated with development of AKI. Patients with AKI KDIGO 2 or 3 underwent more renal replacement therapy (72.2% versus 3.2%; P < 0.01), had longer hospital stay (20 days versus 15 days; P = 0.001), higher in-hospital mortality (44.4% versus 6.5%; P < 0.01) and higher mortality rate after one year (44.4% versus 9.7%; P = 0.01). CONCLUSION: Need for blood transfusion during ICU stay and hyperlactatemia within the first six postoperative hours after liver transplantation are independently associated with moderate or severe AKI. Developing AKI is apparently associated with poor outcomes.

Risk factors for acute kidney injury after liver transplantation in intensive care unit: a retrospective cohort study

ABSTRACT BACKGROUND: Acute kidney injury (AKI) is a frequent complication during the postoperative period following liver transplantation. Occurrence of AKI in intensive care unit (ICU) patients is associated with increased mortality and higher costs. OBJECTIVE: To evaluate occurrences of moderate or severe AKI among patients admitted to the ICU after liver transplantation and investigate characteristics associated with this complication. DESIGN AND SETTING: Single-center retrospective cohort study in a public hospital, Belo Horizonte, Brazil. METHODS: Forty-nine patients admitted to the ICU between January 2015 and April 2017 were included. AKI was defined from a modified Kidney Disease Improving Global Outcomes (KDIGO) score (i.e. based exclusively on serum creatinine levels). RESULTS: Eighteen patients (36.7%) developed AKI KDIGO 2 or 3; mostly KDIGO 3 (16 out of the 18 patients). Lactate level within the first six hours after ICU admission (odds ratio, OR: 1.3; 95% confidence interval, CI: 1.021-1.717; P = 0.034) and blood transfusion requirement within the first week following transplantation (OR: 8.4; 95% CI: 1.687-41.824; P = 0.009) were independently associated with development of AKI. Patients with AKI KDIGO 2 or 3 underwent more renal replacement therapy (72.2% versus 3.2%; P < 0.01), had longer hospital stay (20 days versus 15 days; P = 0.001), higher in-hospital mortality (44.4% versus 6.5%; P < 0.01) and higher mortality rate after one year (44.4% versus 9.7%; P = 0.01). CONCLUSION: Need for blood transfusion during ICU stay and hyperlactatemia within the first six postoperative hours after liver transplantation are independently associated with moderate or severe AKI. Developing AKI is apparently associated with poor outcomes.

Characterization of the transition to oral feeding in premature newborns. / Caracterização da transição alimentar para via oral em recém-nascidos prematuros.

PURPOSE: To characterize the transition from alternative feeding methods to oral feeding, to investigate techniques to favor feeding used during the transition, and the prevalence of breastfeeding at hospital discharge of premature newborns. METHODS: The following variables were considered: gender, gestational age and birth weight, classification of prematurity, time of transition to oral use, corrected gestational age and newborn weight at the beginning and end of the food transition, transition technique used, length of hospitalization and type of breastfeeding at discharge. For data analysis, the software SPSS version 25.0 was used considering the significance level of 5%. RESULTS: Significant results were observed between the premature groups for corrected gestational age at the beginning of the food transition, transition time, and hospital days. CONCLUSION: The study concludes that the breast-probe technique was the most used. The length of hospital stay was shorter for the group of late and moderate preterm newborns. The transition time to the oral route was longer in the group of very preterm infants. Moreover, the proportion of exclusive breastfeeding at hospital discharge was similar between the prematurity classification groups.

OBJETIVO: Caracterizar a transição alimentar da via alternativa para via oral, investigar as técnicas para favorecer a alimentação e a prevalência de aleitamento materno na alta hospitalar de recém-nascidos prematuros. MÉTODO: Estudo observacional, longitudinal e prospectivo desenvolvido numa maternidade. Amostra foi composta por 52 recém-nascidos prematuros e estratificada entre os grupos de prematuridade tardio, moderado e muito pré-termo. Consideraram-se as variáveis: gênero, idade gestacional e peso de nascimento, classificação da prematuridade, tempo de transição para via oral, idade gestacional corrigida e peso do recém-nascido no início e final da transição alimentar, técnica de transição utilizada, tempo de internação hospitalar e tipo de aleitamento no momento da alta. A análise estatística foi realizada com o Software SPSS, versão 25.0. Considerou-se o nível de significância de 5%. RESULTADOS: Foram observados resultados significativos entre os grupos com relação à idade gestacional corrigida no início da transição alimentar, tempo de transição alimentar da via alternativa para via oral e dias de internação. CONCLUSÃO: O estudo conclui que a técnica sonda-peito foi a mais utilizada. O tempo de internação foi menor para o grupo de recém-nascidos pré-termo tardio e moderado. O tempo de transição alimentar para via oral maior no grupo de prematuros muito pré-termo e a proporção do aleitamento materno exclusivo na alta hospitalar foi semelhante entre os grupos de classificação da prematuridade.

Awake Microsurgical Resection for Optochiasmatic Cavernous Malformation.

Cavernous malformations (CM) affect approximately 0.5% of the population, with only a limited portion being located in the optic nerve and chiasma. The clinical presentation is determined by their locations. In the optochiasmatic CM, the acute visual disturbance is the most common presentation. Chronically, many show a progressive visual loss, chronic headache, and pituitary disturbances. The differential diagnosis includes optic glioma, arteriovenous malformations, aneurysm, craniopharyngioma, pituitary apoplexy, and inflammatory conditions. In Video 1, we present the case of a 39-year-old woman with a history of a hemorrhagic optochiasmatic cavernoma in 2016, who started using propranolol to reduce the lesion and symptoms of visual loss. Moreover, the first microsurgical resection of the cavernoma and evacuation of the hematoma were performed in the same year. Owing to evolvement from a partial to a total vision loss in the left eye and presentation of new symptoms in the right eye, the patient underwent microsurgical resection. The surgery was performed sequentially. An awake craniotomy was performed to monitor the chiasma and right optic nerve. The postoperative magnetic resonance imaging showed complete resection of the CM, and the patient fully recovered. The patient signed the institutional consent form, stating that he or she accepts the procedure and allows the use of his or her images and videos for any type of medical publications in conferences and/or scientific articles.

Caracterização da transição alimentar para via oral em recém-nascidos prematuros / Characterization of the transition to oral feeding in premature newborns

RESUMO Objetivo Caracterizar a transição alimentar da via alternativa para via oral, investigar as técnicas para favorecer a alimentação e a prevalência de aleitamento materno na alta hospitalar de recém-nascidos prematuros. Método Estudo observacional, longitudinal e prospectivo desenvolvido numa maternidade. Amostra foi composta por 52 recém-nascidos prematuros e estratificada entre os grupos de prematuridade tardio, moderado e muito pré-termo. Consideraram-se as variáveis: gênero, idade gestacional e peso de nascimento, classificação da prematuridade, tempo de transição para via oral, idade gestacional corrigida e peso do recém-nascido no início e final da transição alimentar, técnica de transição utilizada, tempo de internação hospitalar e tipo de aleitamento no momento da alta. A análise estatística foi realizada com o Software SPSS, versão 25.0. Considerou-se o nível de significância de 5%. Resultados Foram observados resultados significativos entre os grupos com relação à idade gestacional corrigida no início da transição alimentar, tempo de transição alimentar da via alternativa para via oral e dias de internação. Conclusão O estudo conclui que a técnica sonda-peito foi a mais utilizada. O tempo de internação foi menor para o grupo de recém-nascidos pré-termo tardio e moderado. O tempo de transição alimentar para via oral maior no grupo de prematuros muito pré-termo e a proporção do aleitamento materno exclusivo na alta hospitalar foi semelhante entre os grupos de classificação da prematuridade.

ABSTRACT Purpose To characterize the transition from alternative feeding methods to oral feeding, to investigate techniques to favor feeding used during the transition, and the prevalence of breastfeeding at hospital discharge of premature newborns. Methods The following variables were considered: gender, gestational age and birth weight, classification of prematurity, time of transition to oral use, corrected gestational age and newborn weight at the beginning and end of the food transition, transition technique used, length of hospitalization and type of breastfeeding at discharge. For data analysis, the software SPSS version 25.0 was used considering the significance level of 5%. Results Significant results were observed between the premature groups for corrected gestational age at the beginning of the food transition, transition time, and hospital days. Conclusion The study concludes that the breast-probe technique was the most used. The length of hospital stay was shorter for the group of late and moderate preterm newborns. The transition time to the oral route was longer in the group of very preterm infants. Moreover, the proportion of exclusive breastfeeding at hospital discharge was similar between the prematurity classification groups.

Microsurgical Treatment for Posthemorrhagic Cavernoma of Frontal Lobe Coexisting with Unruptured Ipsilateral Middle Cerebral Artery Aneurysm.

Cerebral cavernous malformations, also known as cavernomas, are vascular abnormalities of the brain that are clinically associated with a variety of neurologic symptoms that may include hemorrhagic strokes. They are the most common vascular abnormality, representing 10%-25% of all vascular malformations.1 Lesions associated with cavernomas include developmental venous anomalies, capillary telangiectasias, and other vascular malformations2 but not intracranial aneurysms. The latter association is extremely rare; in fact, there is only 1 case reported in the literature, in which the cavernoma was obscured by the presence of a cerebral hemorrhage and an unruptured aneurysm, which was presumed to be the primary cause of the bleeding, thereby misleading the surgeons to treat only the aneurysm.2 There are different alternatives for the management of different types of lesions.3-5 In this 3-dimensional operative video (Video 1), we present a case of a cavernoma associated with hemorrhage coexisting with an unruptured aneurysm in which we achieved complete resolution of both with microsurgical treatment through a pterional approach.6 The patient consented to publication of images.

Geospatial panorama of long-term care facilities in Brazil: a portrait of territorial inequalities / Panorama geoespacial das Instituições de Longa Permanência para Idosos no Brasil: um retrato das desigualdades territoriais

OBJECTIVES: To map the number and geospatial distribution of Brazilian long-term care facilities (LTCFs) for older adults. Additionally, we sought to highlight the relationship between these findings and the number of older people in the country's 27 Federation Units, demonstrating the growth of these facilities in the last decade. METHODS: This is a descriptive observational study, using secondary data, which was performed in 3 stages: 1) searching and consolidating national and subnational data from different sources and mapping LTCFs; 2) preparing a geospatial map using Brazilian postal codes; and 3) triangulating the number of facilities and of older people in each state and all 5 Brazilian regions. RESULTS: We found 7029 LTCFs in the country, mostly in the Southeast and South regions: São Paulo, Minas Gerais and Rio Grande do Sul had the highest numbers of facilities while states in the North region represented only 1.12% of Brazilian LTCFs. Geospatial mapping highlighted that 64% of the 5 570 Brazilian municipalities did not have any LTCFs for older adults. CONCLUSIONS: We observed a large difference between Brazilian regions regarding the provision of long-term care.

OBJETIVOS: Mapeamento do número e distribuição geoespacial das Instituições de Longa Permanência para idosos (ILPI) brasileiras. Além disso, procuramos destacar a relação entre estes resultados e o número de pessoas idosas nas 27 unidades de da federação, exibindo o crescimento dessas instalações na última década. METODOLOGIA: Estudo observacional descritivo, a partir de dados secundários, realizado em 3 etapas: 1) pesquisa e consolidação de dados nacionais e subnacionais de diferentes fontes e mapeamento de ILPI; 2) elaboração de mapa geoespacial utilizando o código de endereço postal do Brasil, e 3) triangulação do número de instituições com dados sobre o número dos idosos em cada estado e nas cinco regiões brasileiras. RESULTADOS: Encontramos 7.029 ILPI no país, principalmente nas regiões Sudeste e Sul: São Paulo, Minas Gerais e Rio Grande do Sul tiveram o maior número de instalações, enquanto os estados da região Norte representavam apenas 1,12% das ILPI brasileiras. O mapeamento geoespacial destacou que 64% dos 5 570 municípios brasileiros não possuem ILPI para os idosos. CONCLUSÕES: Observamos uma grande diferença no Brasil em relação à prestação de cuidados de longa duração.

Effects of trophic exposure to dexamethasone and diclofenac in freshwater fish.

Steroidal and non-steroidalanti-inflammatories are pharmaceutical prescribed in human medicine and have the potential to contaminate water and sediments via inputs from sewage treatment plants. Their impacts on humans and ecosystems are emerging issues in environmental health. The aim of the present work was to evaluate the effects of diclofenac and dexamethasone in male fish Hoplias malabaricus after trophic exposure. Fish were fed twice every week with Astyanax sp. submitted to intraperitoneal inoculation with diclofenac (0; 0.2; 2.0 or 20.0 µg/kg) or dexamethasone (0; 0.03; 0.3 or 3.0 µg/kg). After 12 doses, blood was collected for testosterone dosage. The gonad and liver were collected to calculate gonadosomatic (GSI) and hepatosomatic index (HSI). Antioxidants enzymes activity and biotransformation were also evaluated in liver and gonads. In liver, diclofenac caused oxidative stress with increased superoxide dismutase (SOD) and glutathione peroxidase (GPx) activities and lipoperoxidation (LPO). The GST activity was reduced by diclofenac in liver. Trophic exposure of H. malabaricus to dexamethasone caused an increase in antioxidant system (GPx, CAT, GST, and GSH) and LPO in liver. However, it reduced antioxidant system (GPX and GST activities and GSH) in gonads. Both diclofenac and dexamethasone reduced the levels of testosterone, causing impairment to reproduction. Diclofenac reduced HSI at the 0.2 µg/kg, but not GSI. Our results suggest that the anti-inflammatory drugs diclofenac and dexamethasone caused oxidative stress and reduced testosterone levels that can have a negative impact in aquatic organisms.

Modulatory effect of nano TiO2on Pb in Hoplias malabaricus trophically exposed.

This study investigated the hepatic and neural effects of TiO2 nanoparticle and Pb in Hoplias malabaricus trophically exposed. The alanine transaminase activity was altered at the high dose of exposed group to Pb and at the lowest doses of co-exposed groups. It may reflect the hepatic effects of TiO2 on Pb toxicity, but the aspatate transaminase activity was not altered. The decreased injury index observed at the highest dose of co-exposed group compared to TiO2 may be related to the increased energy demand and can explain the more pronounced toxic effects observed in this group. The liver authomethallography revealed the metals presence at high dose groups. Serotonin concentration increased at the Pb lowest dose and at the highest dose of co-exposed group compare to control. Most importantly, when associated the contaminants were able to interact and altered some biomarkers. However, further studies, about action mechanisms of this co-exposure are needed.

Association between vascular calcification and osteoporosis in men with type 2 diabetes.

Atherosclerotic vascular disease is common in diabetes, and some data support a link with bone loss. This study evaluates the association between osteoporosis and clinical and metabolic factors and chronic complications of diabetes. We studied 59 diabetic men aged 50-80 yr who were assessed with bone densitometry (dual-energy X-ray absorptiometry). Of them, 10.2% of the patients were found to have osteoporosis in the lumbar spine and 45.8% osteopenia, whereas in the femoral neck, 11.8% had osteoporosis and 49% had osteopenia. There was a significant association of osteoporosis in the lumbar spine L1-L4 (p=0.004) and in the femoral neck (p=0.036) with iliac artery calcification. In addition, there was no association with any other metabolic factors, clinical factors, or chronic complications of diabetes evaluated, except for an association between a previous personal history of fractures (p=0.016) and low bone mineral density in the femoral neck. In conclusion, we found a positive association between the iliac artery calcification and osteoporosis in type 2 diabetic male patients.

Bariatric surgery and bone metabolism: a systematic review.

Few studies have demonstrated the risk of metabolic bone disease and a reduction in bone mineral density (BMD) after bariatric surgery. A systematic review was conducted of case-control and cohort studies with the aim of evaluating the relationship between bariatric surgery and bone metabolism. The search was undertaken in MedLine, covering the period from January 1997 to August 2009, using the keywords: "bariatric surgery" AND "osteoporosis", "fracture", "bone diseases", "metabolic". Six studies were included, comprising four cohort and two case-control studies. Three studies evaluated bone metabolism and BMD, and the other evaluated bone metabolism only. Based on this review, bariatric surgery is associated with alterations in bone metabolism, loss of bone mass and an increased risk of fracture. However, the maximum evaluation period covered by these studies was two years after surgery, hence the need to undertake further studies of longer duration in order to achieve a more thorough understanding of this association.

Effects of fluids on microvascular perfusion in patients with severe sepsis.

PURPOSE: To evaluate the effects of fluid administration on microcirculatory alterations in sepsis. METHODS: With a Sidestream Dark Field device, we evaluated the effects of fluids on the sublingual microcirculation in 60 patients with severe sepsis. These patients were investigated either within 24 h (early, n = 37) or more than 48 h (late, n = 23) after a diagnosis of severe sepsis. Hemodynamic and microcirculatory measurements were obtained before and 30 min after administration of 1,000 ml Ringer's lactate (n = 29) or 400 ml 4% albumin (n = 31) solutions. RESULTS: Fluid administration increased perfused small vessel density from 3.5 (2.9-4.3) to 4.4 (3.7-4.9) n/mm (p < 0.01), through a combined increase in the proportion of perfused small vessels from 69 (62-76) to 79 (71-83) %, p < 0.01) and in small vessel density from 5.3 (4.4-5.9) to 5.6 (4.8-6.3) n/mm (p < 0.01). Importantly, microvascular perfusion increased in the early but not in the late phase of sepsis: the proportion of perfused small vessels increased from 65 (60-72) to 80 (75-84) % (p < 0.01) in the early phase and from 75 (66-80) to 74 (67-81) (p = ns) in the late phase. These microvascular effects of fluids were not related to changes in cardiac index (R(2) = 0.05, p = ns) or mean arterial pressure (R(2) = 0.04, p = ns). CONCLUSIONS: In this non-randomized trial, fluid administration improved microvascular perfusion in the early but not late phase of sepsis. This effect is independent of global hemodynamic effects and of the type of solution.

Bariatric surgery and bone metabolism: a systematic review / Cirurgia bariátrica e metabolismo ósseo: uma revisão sistemática

Few studies have demonstrated the risk of metabolic bone disease and a reduction in bone mineral density (BMD) after bariatric surgery. A systematic review was conducted of case-control and cohort studies with the aim of evaluating the relationship between bariatric surgery and bone metabolism. The search was undertaken in MedLine, covering the period from January 1997 to August 2009, using the keywords: "bariatric surgery" AND "osteoporosis", "fracture", "bone diseases", "metabolic". Six studies were included, comprising four cohort and two case-control studies. Three studies evaluated bone metabolism and BMD, and the other evaluated bone metabolism only. Based on this review, bariatric surgery is associated with alterations in bone metabolism, loss of bone mass and an increased risk of fracture. However, the maximum evaluation period covered by these studies was two years after surgery, hence the need to undertake further studies of longer duration in order to achieve a more thorough understanding of this association.

Alguns estudos têm demonstrado aumento do risco de doença osteometabólica e redução de densidade mineral óssea (DMO) após a cirurgia bariátrica. Realizou-se uma revisão sistemática de estudos de caso-controle e coorte com o objetivo de avaliar a relação entre cirurgia bariátrica e o metabolismo ósseo. A procura foi realizada na MedLine de janeiro 1997 a agosto 2009, utilizando os descritores: "bariatric surgery" e "osteoporosis", "fracture", "bone diseases", "metabolic". Foram incluídos seis estudos, sendo quatro coortes e dois casos-controle. Três desses estudos avaliaram metabolismo ósseo e DMO e os demais avaliaram apenas o metabolismo ósseo. Com base nesta revisão, a cirurgia bariátrica está associada com alterações no metabolismo ósseo, perda de massa óssea e aumento no risco de fraturas. Entretanto, os estudos tiveram acompanhamento máximo de dois anos após a cirurgia, havendo necessidade de estudos de maior seguimento para melhor conhecimento dessa associação.

Near-infrared spectroscopy technique to evaluate the effects of red blood cell transfusion on tissue oxygenation.

INTRODUCTION: The aim of this study was to evaluate the effects of red blood cell (RBC) transfusions on muscle tissue oxygenation, oxygen metabolism and microvascular reactivity in critically ill patients using near-infrared spectroscopy (NIRS) technology. METHODS: This prospective, observational study included 44 consecutive patients hospitalized in the 31-bed, medical-surgical intensive care unit of a university hospital with anemia requiring red blood cell transfusion. Thenar tissue oxygen saturation (StO2) and muscle tissue hemoglobin index (THI) were measured using a tissue spectrometer (InSpectra Model 325; Hutchinson Technology Inc., Hutchinson, MN, USA). A vaso-occlusive test was performed before and 1 hour after RBC transfusion by rapid inflation of a pneumatic cuff around the upper arm. The following variables were recorded: THI, the StO2 desaturation slope during the occlusion (%/minute) and the StO2 upslope of the reperfusion phase following the ischemic period (%/second). Muscle oxygen consumption (NIR VO2; arbitrary units) was calculated as the product of the inverse StO2 desaturation slope and the mean THI over the first minute of arterial occlusion. RESULTS: Blood transfusion resulted in increases in hemoglobin (from 7.1 (6.7 to 7.7) to 8.4 (7.1 to 9) g/dl; P < 0.01) and in oxygen delivery (from 306 (259 to 337) to 356 (332 to 422) ml/minute/m2; P < 0.001). However, systemic VO2 was unchanged. RBC transfusion did not globally affect NIRS-derived variables, but there was considerable interindividual variation. Changes in the StO2 upslope of the reperfusion phase after transfusion were negatively correlated with baseline StO2 upslope of the reperfusion phase (r2 = 0.42; P < 0.0001). Changes in NIR VO2 after transfusion were also negatively correlated with baseline NIR VO2 (r2 = 0.48; P = 0.0015). There were no correlations between RBC storage time and changes in StO2 slope or NIR VO2. CONCLUSIONS: Muscle tissue oxygenation, oxygen consumption and microvascular reactivity are globally unaltered by RBC transfusion in critically ill patients. However, muscle oxygen consumption and microvascular reactivity can improve following transfusion in patients with alterations of these variables at baseline.

Medicina intensiva na graduação médica: perspectiva do estudante / Intensive care medicine on medical undergraduation: student's perspective

JUSTIFICATIVA E OBJETIVOS: Acredita-se que existe uma deficiência no ensino de Medicina Intensiva (MI) na graduação da maioria das escolas médicas, levando a um prejuízo na formação acadêmica de futuros médicos. O objetivo deste estudo foi analisar o ensino e o grau de interesse em MI por estudantes de Medicina de Salvador-BA. MÉTODO: Estudo transversal realizado em 2005 entre estudantes do 6º ao 12º semestres de duas escolas médicas baianas. Utilizou-se um questionário auto-aplicável composto de questões objetivas sobre interesse, habilidades e conhecimentos dos estudantes sobre MI, bem como a sua opinião sobre o ensino dessa especialidade em sua faculdade. RESULTADOS: Foram entrevistados 570 estudantes. A maioria (57,5 por cento) nunca realizou estágio em unidades de terapia intensiva (UTI). Contudo, a utilidade deste para o futuro profissional de um médico foi classificada como alta (média de 4,14 ± 1,05, numa escala de 1 a 5) pelos entrevistados. O interesse em MI foi considerado alto ou muito alto por 53,7 por cento da amostra. Quase todos os alunos (97 por cento) acreditam que tópicos de MI devam ser mais explorados em seus currículos. Apenas 42,1 por cento sentiam-se seguros em avaliar um paciente gravemente enfermo, sendo essa segurança maior entre aqueles que já realizaram estágios em UTI (p < 0,001). Os tópicos de MI de maior interesse foram choque, reanimação cardiopulmonar e sepse. CONCLUSÕES: O presente estudo revelou um alto interesse em Medicina Intensiva entre estudantes de Medicina da Bahia. Contudo, a maioria nunca realizou estágio em UTI, o que demonstrou ser importante fator na segurança do médico em formação frente ao paciente gravemente enfermo.

BACKGROUND AND OBJECTIVES: There are deficiencies on Intensive Medicine (IM) teaching in most of medical undergraduate schools. Those deficiencies may imply damages on their clinical competence. The objective of this study was to analyze current status of IM teaching and the medical undergraduate student interest in this speciality. METHODS: A cross-sectional study was performed in 2005. We applied a self-reported questionnaire to enrolled students between the sixth and the last semesters of two medical schools from Salvador-Bahia. The questionnaire contained questions about students' interest and knowledge on IM, and opinion on IM teaching in their schools. RESULTS: We studied 570 students. Most of them (57.5 percent) had never realized a clerkship in intensive care unit (ICU) despite classifying its usefulness as high (mean of 4.14 ± 1.05, in a scale from 1 to 5). IM interest was high or very high in 53.7 percent of sample. Almost all students (97 percent) thought that IM topics should be more explored at their curriculum. Only 42.1 percent reported to be able to assess a critical care patient and this assurance was higher among students with previous clerkship in ICU (p < 0.001). Shock, cardiopulmonary resuscitation and sepsis were the most interesting topics in ICU for students' opinion. CONCLUSIONS: This study revealed a high interest in IM among medical undergraduate students. However, most had never practice a clerkship in ICU, demonstrating to be an important factor on undergraduate student performance faced to a critical care patient.