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1.
Sensors (Basel) ; 23(2)2023 Jan 10.
Artigo em Inglês | MEDLINE | ID: mdl-36679607

RESUMO

This paper presents an integrated monitoring system for the driver and the vehicle in a single case of study easy to configure and replicate. On-board vehicle sensors and remote sensors are combined to model algorithms for estimating polluting emissions, fuel consumption, driving style and driver's health. The main contribution of this paper is the analysis of interactions among the above monitored features highlighting the influence of the driver in the vehicle performance and vice versa. This analysis was carried out experimentally using one vehicle with different drivers and routes and implemented on a mobile application. Compared to commercial driver and vehicle monitoring systems, this approach is not customized, uses classical sensor measurements, and is based on simple algorithms that have been already proven but not in an interactive environment with other algorithms. In the procedure design of this global vehicle and driver monitoring system, a principal component analysis was carried out to reduce the variables used in the training/testing algorithms with objective to decrease the transfer data via Bluetooth between the used devices: a biometric wristband, a smartphone and the vehicle's central computer. Experimental results show that the proposed vehicle and driver monitoring system predicts correctly the fuel consumption index in 84%, the polluting emissions 89%, and the driving style 89%. Indeed, interesting correlation results between the driver's heart condition and vehicular traffic have been found in this analysis.


Assuntos
Condução de Veículo , Aplicativos Móveis , Acidentes de Trânsito , Computadores , Smartphone
2.
Pharmacol Res ; 121: 114-121, 2017 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-28465217

RESUMO

Major Depressive Disorder (MDD, ICD-10: F-33) is a prevalent illness in which the pathogenic mechanism remains elusive. Recently an important role has been attributed to neuro-inflammation, and specifically the NLRP3-inflammasome complex, in the pathogenesis of MDD. This suggests a key role for immunomodulation as a key pathway in the treatment of this disorder. This study evaluates the involvement of nine common antidepressants in the NLRP3-inflammasome complex (fluoxetine, paroxetine, mianserin, mirtazapine, venlafaxine, desvenlafaxine, amitriptyline, imipramine and agomelatine), both in in vitro THP-1 cells stimulated by ATP, and in a stress-induced depressive animal or MDD patients. Antidepressant treatment induced inflammasome inhibition was observed by decreased serum levels of IL-1ß and IL-18 and decrease of NLRP3 and IL-1ß (p17) protein expression. This was also observed under stress-induced depressive behaviour and inflammasome activation in C57Bl/6 mice in vivo. Deletion of key autophagy mediator Atg5 in embryonic fibroblasts (MEF cells) showed an autophagy dependent-NLRP3-inflammasome inhibition by antidepressant treatment. These results suggest the NLRP3-inflammasome could be a biomarker for antidepressant treatment response in MDD patients, and therefore the monitoring of NLRP3 expression levels and/or IL-1ß/IL-18 release may have clinical value in drug selection. Existing evidence suggests an anti-inflammatory effect of some antidepressants shown by IL-1ß, IL-6 and TNF-α. Our data have shown that antidepressant-mediated autophagy may have a role in restoration of certain metabolic and immunological pathways in MDD patients.


Assuntos
Antidepressivos/uso terapêutico , Autofagia/efeitos dos fármacos , Transtorno Depressivo Maior/tratamento farmacológico , Inflamassomos/antagonistas & inibidores , Proteína 3 que Contém Domínio de Pirina da Família NLR/antagonistas & inibidores , Adulto , Animais , Antidepressivos/farmacologia , Linhagem Celular , Transtorno Depressivo Maior/sangue , Transtorno Depressivo Maior/imunologia , Feminino , Humanos , Inflamassomos/imunologia , Interleucina-1beta/sangue , Interleucina-1beta/imunologia , Masculino , Camundongos Endogâmicos C57BL , Pessoa de Meia-Idade , Proteína 3 que Contém Domínio de Pirina da Família NLR/imunologia
3.
Int J Mol Sci ; 15(9): 15225-43, 2014 Aug 28.
Artigo em Inglês | MEDLINE | ID: mdl-25170809

RESUMO

Cell therapy now constitutes an important area of regenerative medicine. The aging of the population has mandated the discovery and development of new and innovative therapeutic modalities to combat devastating disorders such as stroke. Menstrual blood and Sertoli cells represent two sources of viable transplantable cells that are gender-specific, both of which appear to have potential as donor cells for transplantation in stroke. During the subacute phase of stroke, the use of autologous cells offers effective and practical clinical application and is suggestive of the many benefits of using the aforementioned gender-specific cells. For example, in addition to being exceptionally immunosuppressive, testis-derived Sertoli cells secrete many growth and trophic factors and have been shown to aid in the functional recovery of animals transplanted with fetal dopaminergic cells. Correspondingly, menstrual blood cells are easily obtainable and exhibit angiogenic characteristics, proliferative capability, and pluripotency. Of further interest is the ability of menstrual blood cells, following transplantation in stroke models, to migrate to the infarct site, secrete neurotrophic factors, regulate the inflammatory response, and be steered towards neural differentiation. From cell isolation to transplantation, we emphasize in this review paper the practicality and relevance of the experimental and clinical use of gender-specific stem cells, such as Sertoli cells and menstrual blood cells, in the treatment of stroke.


Assuntos
Células-Tronco Adultas/citologia , Diferenciação Celular , Caracteres Sexuais , Transplante de Células-Tronco/métodos , Células-Tronco Adultas/transplante , Animais , Feminino , Humanos , Masculino
4.
Cureus ; 16(2): e55226, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38558685

RESUMO

We present the case of a lung transplant candidate under veno-venous membrane oxygenation assistance (VV ECMO) whose diagnosis of emphysema of undetermined etiology was redefined as Langerhans cell histiocytosis (LCH) due to a scalp skin biopsy performed years after the beginning of his respiratory symptoms. A 20-year-old patient started three years before his admission with progressive dyspnea leading to a diagnosis of bullous emphysema of undetermined cause, which evolved into respiratory failure and evaluation for bilateral lung transplant. Three years later, he developed bilateral pneumonia requiring mechanical ventilation. When refractory hypoxemia ensued, he had to be placed on VV ECMO. Under these conditions, he was transferred to our center and listed for a bilateral pulmonary transplantation. Forty-eight hours after admission, and due to intense polyuria, central diabetes insipidus was diagnosed. In this clinical context, the presence of cutaneous lesions on the scalp was reconsidered and biopsied under the presumption of possible LCH, with pathology analysis confirming the diagnosis. He continued to be assisted with VV ECMO for 66 more days as a bridge to transplantation, developing multi-organ failure and passing away before a donor organ was available. The diagnosis of LCH should be considered in any adult patient with bullous emphysema of undetermined cause. Given the possibility of early therapeutic interventions, the search for its clinical associations (e.g., diabetes insipidus and/or skin lesions) should be a systematic part of the etiologic workup. The availability of skin specimens to reach a diagnosis makes its thorough search an important part of the diagnostic approach.

5.
Rev Esp Salud Publica ; 972023 Oct 25.
Artigo em Espanhol | MEDLINE | ID: mdl-37921386

RESUMO

OBJECTIVE: Bronchiolitis is the leading cause of hospitalization in children under one year of age, with annual epidemics. Since the onset of the SARS-CoV-2 coronavirus disease pandemic (COVID-19), there has been a change in the transmission of other respiratory viruses. Our aim in this paper was to describe how COVID-19 had affected the distribution of acute bronchiolitis in our country. METHODS: We conducted a retrospective descriptive study of the cases of bronchiolitis treated in a sample of Spanish hospitals belonging to four autonomous communities. A chi-square test and Student's t- test were used to compare epidemiological and demographic variables between patients attending the hospital with bronchiolitis during January 2021-June 2021 with patients attending the hospital in the previous three years (2018-2020). RESULTS: We analyzed 6,124 cases of bronchiolitis (58.8% males and 41.2% females). The mean age was 0.5 years (SD: 0.4). In 2020, we observed a decrease of bronchiolitis cases compared to 2019 of 67%. During 2020 and 2021, the epidemic season started in January-February and peaked in June. During the first half of 2021, the highest percentage of admissions for bronchiolitis associated with RSV infection was observed in hospitals in central Spain corresponding to the Autonomous Community of Madrid (78.5% of admissions). CONCLUSIONS: The COVID-19 pandemic significantly modifies the seasonality of bronchiolitis. In our country, the flow and distribution of the disease are not uniform. It starts in the center of Spain and ends on the coast.


OBJETIVO: La bronquiolitis es la primera causa de hospitalización en menores de un año, presentándose en forma de epidemias anuales. Desde el inicio de la pandemia por la enfermedad causada por el coronavirus SARS-CoV-2 (COVID-19) se ha producido un cambio en la transmisión de otros virus respiratorios. Nuestro objetivo en este trabajo fue describir cómo había afectado la pandemia de la COVID-19 a la distribución de la bronquiolitis aguda en nuestro país. METODOS: Realizamos un estudio descriptivo retrospectivo de los casos de bronquiolitis atendidos en una muestra de hospitales españoles que pertenecían a cuatro comunidades autónomas. Empleado el test chi-cuadrado y la prueba t de Student comparamos variables epidemiológicas y demográficas de los casos de bronquiolitis atendidos durante enero de 2021 y junio 2021, con los tres años anteriores (2018-2020). RESULTADOS: Analizamos 6.124 casos de bronquiolitis (58,8% varones y 41,2% mujeres). La media de edad fue de 0,5 años (DE: 0,4). En 2020 observamos un descenso de casos de bronquiolitis con respecto a 2019 del 67%. Durante 2020 y 2021 la temporada epidémica empezó en enero-febrero y alcanzó su pico máximo en junio. Durante el primer semestre de 2021, el porcentaje más elevado de ingresos por bronquiolitis asociados a infección VRS fue observado en hospitales del centro de España correspondientes a la Comunidad Autónoma de Madrid (78,5% de los ingresos). CONCLUSIONES: La pandemia por la COVID-19 modifica de manera significativa la estacionalidad de la bronquiolitis. En nuestro país, el flujo y distribución de la enfermedad no es uniforme, comenzado por el centro peninsular y, por último, la zona litoral.


Assuntos
Bronquiolite , COVID-19 , Infecções por Vírus Respiratório Sincicial , Masculino , Feminino , Criança , Humanos , Lactente , COVID-19/epidemiologia , COVID-19/complicações , Pandemias , Estudos Retrospectivos , SARS-CoV-2 , Espanha/epidemiologia , Bronquiolite/epidemiologia , Bronquiolite/etiologia , Infecções por Vírus Respiratório Sincicial/complicações , Infecções por Vírus Respiratório Sincicial/epidemiologia , Hospitalização
6.
Emergencias ; 35(1): 31-38, 2023 02.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-36756914

RESUMO

OBJECTIVES: To evaluate the impact of a quality-of-care improvement program implemented in emergency departments (EDs) in a Spanish autonomous community with the aim of reducing the use of unrecommended drugs when treating infants for acute bronchiolitis. MATERIAL AND METHODS: Before-after quasi-experimental intervention study. We retrospectively included infants aged 12 months or less who were treated for acute bronchiolitis in 24 Spanish national health system hospital EDs in December during 2 epidemic periods: in 2018, before implementing the program, and in 2019, after implementation. Data collected included epidemiologic information, clinical and care details, and clinical course. The program consisted of providing informative material and training sessions before the epidemic period started. RESULTS: A total of 7717 episodes (4007 in 2018 and 2710 in 2019) were identified. Epidemiologic and clinical characteristics did not differ between the 2 periods. ED use of the following treatments decreased between the 2 periods: salbutamol, from 29.4% (95% CI, 28.8%-30.8%) in 2018 to 10.6% (95% CI, 9.6%-11.6%) in 2019; epinephrine from 6.0% (95% CI, 5.3%-6.8%) to 0.9% (95% CI, 0.7%-1.3%); and hypertonic saline solution fell from 8.2% (95% CI, 7.3%-9.1%) to 2.1% (95% CI, 1.7%-2.6%) (P.001, all comparisons). Prescriptions for salbutamol on discharge fell from 38.7% (95% CI, 36.9%-40.4%) to 10.6% (95% CI, 9.6%-11.6%) (P.001). Admissions and readmissions did not change, and the median time (interquartile range) spent in the ED fell from 81 (44-138) minutes to 66 (37-127) minutes (P.001). CONCLUSION: The quality-of-care improvement initiative was able to decrease the number of unrecommended therapeutic interventions for acute bronchiolitis. However, we identified great variations between EDs, suggesting that training and assessment of impact should continue.


OBJETIVO: Evaluar el impacto de una iniciativa de mejora realizada en los servicios de urgencias (SU) de una comunidad autónoma para reducir el uso de fármacos no recomendados en lactantes con bronquiolitis aguda (BA). METODO: Estudio cuasi-experimental analítico del tipo "antes y después de una intervención". Se incluyeron de forma retrospectiva todas las BA en niños # 12 meses atendidas en los SU de 24 hospitales públicos durante el mes de diciembre de dos periodos epidémicos: 2018 (preintervención) y 2019 (postintervención). Se recogieron variables epidemiológicas, clínicas, asistenciales y evolutivas. La intervención consistió en difundir material informativo y realizar actividades formativas previas al periodo epidémico. RESULTADOS: Se incluyeron 7.717 episodios (2018: 4.007 y 2019: 3.710). No existieron diferencias en las características epidemiológicas y clínicas. El empleo de salbutamol en los SU descendió del 29,4% [intervalo de confianza del 95% (IC 95%): 28,8-30,8] en 2018 al 10,6% (IC 95%: 9,6-11,6) en 2019 (p 0,001), el de adrenalina del 6,0% (IC 95%: 5,3-6,8) al 0,9% (IC 95%: 0,7-1,3) y el de suero salino hipertónico del 8,2% (IC 95%: 7,3-9,1) al 2,1% (IC 95%: 1,7-2,6) (p 0,001). La prescripción al alta de salbutamol se redujo del 38,7% (IC 95%: 36,9-40,4) al 10,6% (IC 95%: 9,6-11,6) (p 0,001). La tasa de ingreso y la tasa de readmisión no cambiaron y la mediana de tiempo de estancia en los SU se redujo 81 minutos [rango intercuartil (RIC) 44-138] a 66 (RIQ: 37-127) (p 0,001). CONCLUSIONES: La iniciativa de mejora ha conseguido disminuir la tasa de intervenciones terapéuticas no indicadas en BA. Sin embargo, existe una gran variabilidad entre los diferentes SU por lo que la estrategia y la medición de su impacto deben mantenerse en el tiempo.


Assuntos
Bronquiolite , Humanos , Lactente , Estudos Retrospectivos , Doença Aguda , Bronquiolite/tratamento farmacológico , Serviço Hospitalar de Emergência , Albuterol/uso terapêutico
7.
Animals (Basel) ; 12(18)2022 Sep 08.
Artigo em Inglês | MEDLINE | ID: mdl-36139205

RESUMO

Nose work with military working dogs (MWDs) in warmer-than-usual areas has led us to look for new tools to reduce both heat stress and the risk of heat stroke. One of the different strategies to manage heat stress is the use of cooling vests, such as those used in humans. The aim was to assess three cooling conditions (using two different cooling vests during exercise and the non-use of such garments) by measuring core body temperature, systemic blood pressure and pulse rate before and after the exercise (moment: four measurement times) in military dogs of the I Military Police Battalion (in Valencia, Spain). All dogs were evaluated under all three conditions during the three days of the study. Significant differences were observed between condition, moment, and the interaction of these two factors, in relation to core body temperature and pulse rate. Therefore, the use of an evaporative cooling vest may further be useful as a routine thermal control and conditioning measure in MWDs.

8.
Reumatol Clin (Engl Ed) ; 17(9): 530-535, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-34756315

RESUMO

BACKGROUND AND PURPOSE: Osteoarthritis (OA) is considered the most common degenerative joint pathology in the adult population, being an important cause of disability worldwide, and its prevalence is increasingly associated with different factors, including obesity. Obesity together with metabolic syndrome have been associated with a pro-inflammatory state due to the release of cytokines that induce changes in cartilage metabolism. Chemerin is an adipokine secreted mainly by adipocytes and its final action is to increase the production of IL-6, IL-8, IL-1b, TNF-a and metalloproteinases by macrophages, dendritic cells and chondrocytes, which are responsible for damage to the articular cartilage. This is one of the reasons that obesity and inflammation have been linked to OA. The main objective of this study is to determine whether the serum chemerin concentrations of a group of patients with primary OA are higher when compared with control individuals. A further purpose of the study is to determine the relationship between the presence of obesity/overweight with the severity of the disease measured by a radiological scale. PATIENTS AND METHODS: An analytical cross-sectional study was carried out where serum chemerin levels were quantified by enzyme-linked immunoadsorption assay (ELISA), in patients with primary OA of the hip, knee and hand with criteria from the ACR (American College Of Rheumatology) and controls. Radiological studies of patients and controls were analysed to determine the severity of joint involvement using the Kellgren and Lawrence (KL) classification system. The statistical significance of the difference in serum chemerin values between the two groups was verified and the correlation between the variables of body mass index (BMI) with radiological severity, number of joint regions and serum chemerin levels was analysed. RESULTS: During the period from July 2015 to July 2016, serum samples and radiographs of compromised joints were collected from 40 patients with primary OA who met the inclusion criteria, as well as serum samples from 20 controls. The average concentration of chemerin was higher in the group of patients with OA compared to that of the control group, being 373ng / ml and 175.55ng / ml respectively (p<2.2×10-16). No significant associations were found between the different degrees of disease severity measured by the KL radiological scale, such as the number of involved joint regions and BMI. CONCLUSIONS: In a group of patients with primary OA of the hand, knee or hip, the values of chemerin were higher than those found in controls, without significant association with the severity of the disease established radiologically by K/L scale, the number of involved joint regions, and the BMI.


Assuntos
Cartilagem Articular , Osteoartrite do Joelho , Quimiocinas , Colômbia , Estudos Transversais , Humanos , Articulação do Joelho , Estados Unidos
9.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-32718859

RESUMO

BACKGROUND AND PURPOSE: Osteoarthritis (OA) is considered the most common degenerative joint pathology in the adult population, being an important cause of disability worldwide, and its prevalence is increasingly associated with different factors, including obesity. Obesity together with metabolic syndrome have been associated with a pro-inflammatory state due to the release of cytokines that induce changes in cartilage metabolism. Chemerin is an adipokine secreted mainly by adipocytes and its final action is to increase the production of IL-6, IL-8, IL-1b, TNF-α and metalloproteinases by macrophages, dendritic cells and chondrocytes, which are responsible for damage to the articular cartilage. This is one of the reasons that obesity and inflammation have been linked to OA. The main objective of this study is to determine whether the serum chemerin concentrations of a group of patients with primary OA are higher when compared with control individuals. A further purpose of the study is to determine the relationship between the presence of obesity/overweight with the severity of the disease measured by a radiological scale. PATIENTS AND METHODS: An analytical cross-sectional study was carried out where serum chemerin levels were quantified by enzyme-linked immunoadsorption assay (ELISA), in patients with primary OA of the hip, knee and hand with criteria from the American College Of Rheumatology (ACR) and controls. Radiological studies of patients and controls were analysed to determine the severity of joint involvement using the Kellgren and Lawrence (KL) classification system. The statistical significance of the difference in serum chemerin values between the two groups was verified and the correlation between the variables of body mass index (BMI) with radiological severity, number of joint regions and serum chemerin levels was analysed. RESULTS: During the period from July 2015 to July 2016, serum samples and radiographs of compromised joints were collected from 40 patients with primary OA who met the inclusion criteria, as well as serum samples from 20 controls. The average concentration of chemerin was higher in the group of patients with OA compared to that of the control group, being 373 ng / ml and 175.55 ng / ml respectively (p<2.2×10-16). No significant associations were found between the different degrees of disease severity measured by the KL radiological scale, such as the number of involved joint regions and BMI. CONCLUSIONS: In a group of patients with primary OA of the hand, knee or hip, the values of chemerin were higher than those found in controls, without significant association with the severity of the disease established radiologically by K/L scale, the number of involved joint regions, and the BMI.

10.
Geroscience ; 42(2): 715-725, 2020 04.
Artigo em Inglês | MEDLINE | ID: mdl-31975052

RESUMO

Aging is the major risk factor for many metabolic chronic diseases. Several metabolic pathways suffer a progressive impairment during aging including body composition and insulin resistance which are associated to autophagy dysfunction and increased inflammation. Many of these alterations are aggravated by non-healthy lifestyle such as obesity and hypercaloric diet which have been shown to accelerate aging. Here, we show that the deleterious effect of hypercaloric diets is reverted by the NLRP3 inflammasome inhibition. NLRP3 deficiency extends mean lifespan of adult mice fed a high-fat diet. This lifespan extension is accompanied by metabolic health benefits including reduced liver steatosis and cardiac damage, improved glucose and lipid metabolism, and improved protein expression profiles of SIRT-1, mTOR, autophagic flux, and apoptosis. These findings suggest that the suppression of NLRP3 prevented many age-associated changes in metabolism impaired by the effect of hypercaloric diets.


Assuntos
Inflamassomos , Longevidade , Proteína 3 que Contém Domínio de Pirina da Família NLR , Animais , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Obesos
11.
Comput Inform Nurs ; 27(5): 318-23, 2009.
Artigo em Inglês | MEDLINE | ID: mdl-19726926

RESUMO

Vital signs are a fundamental component of patient care. Omitted or inaccurately transcribed vital sign data could result in inappropriate, delayed, or missed treatment. A previous baseline study determined that error rates for vital signs captured on plain paper then entered into a paper chart or EMR were 10% and 4.4%, respectively. This study evaluated the impact of automated vital signs captured using a PDA with bar-code technology for patient identification. The PDA enabled the wireless capture and transmission of data directly from the vital sign monitor into the EMR. Researchers reviewed 1514 sets of vital signs collected electronically for accuracy and compared the error rate with data from the previous paper and EMR systems. Automated upload of vital signs directly into an EMR reduced the documentation error rate to less than 1%. This represented a significant reduction in vital sign documentation errors with the use of mobile technology when compared with traditional charting methods (P < .001). The automated vital sign data upload system helped promote a culture of patient safety by greatly reducing documentation error rates. Additional safety benefits may include improved timeliness to vital sign data and clinical work-flow processes.


Assuntos
Documentação/normas , Sistemas de Informação Hospitalar/normas , Erros Médicos/prevenção & controle , Sistemas Computadorizados de Registros Médicos/normas , Sinais Vitais , Comunicação , Eficiência Organizacional , Sistemas de Informação Hospitalar/organização & administração , Humanos , Sistemas Computadorizados de Registros Médicos/organização & administração , Desenvolvimento de Pessoal
12.
Materials (Basel) ; 12(7)2019 Apr 09.
Artigo em Inglês | MEDLINE | ID: mdl-30970660

RESUMO

Automotive components manufacturers use the 5160 steel in leaf and coil springs. The industrial heat treatment process consists in austenitizing followed by the oil quenching and tempering process. Typically, compressive residual stresses are induced by shot peening on the surface of automotive springs to bestow compressive residual stresses that improve the fatigue resistance and increase the service life of the parts after heat treatment. In this work, a high-speed quenching was used to achieve compressive residual stresses on the surface of AISI/SAE 5160 steel samples by producing high thermal gradients and interrupting the cooling in order to generate a case-core microstructure. A special laboratory equipment was designed and built, which uses water as the quenching media in a high-speed water chamber. The severity of the cooling was characterized with embedded thermocouples to obtain the cooling curves at different depths from the surface. Samples were cooled for various times to produce different hardened case depths. The microstructure of specimens was observed with a scanning electron microscope (SEM). X-ray diffraction (XRD) was used to estimate the magnitude of residual stresses on the surface of the specimens. Compressive residual stresses at the surface and sub-surface of about -700 MPa were obtained.

13.
Materials (Basel) ; 12(7)2019 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-30939850

RESUMO

Cobalt-based alloys are widely used in the manufacture of joint prostheses. In this study, the effect of boron additions and heat treatment on the ASTM F75 was evaluated by rotating bending fatigue. The boron ranged from 0.06⁻1 wt %. The alloys were tested in as-cast and heat-treated conditions. In the as-cast condition, the infinite life was observed at 380 MPa, improving to 433⁻615 MPa according to the amount of boron added. In the heat treatment condition, the fatigue resistance was improved only in the base alloy. The addition of 0.06 wt % boron and heat treatment led to the same resistance as in the as-cast condition. Adding large amounts of boron combined with heat treatment diminished the fatigue limit. The fracture analysis revealed primarily brittle behaviour with some ductile features even on the same sample; only the heat-treated alloy with 0.06 wt % boron was clearly ductile. This alloy also exhibited notably better toughness to crack propagation.

14.
Brain Circ ; 3(3): 135-142, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-30276315

RESUMO

Every year, approximately 1.4 million US citizens visit emergency rooms for traumatic brain injuries. Formerly known as an acute injury, chronic neurodegenerative symptoms such as compromised motor skills, decreased cognitive abilities, and emotional and behavioral changes have caused the scientific community to consider chronic aspects of the disorder. The injury causing impact prompts multiple cell death processes, starting with neuronal necrosis, and progressing to various secondary cell death mechanisms. Secondary cell death mechanisms, including excitotoxicity, oxidative stress, mitochondrial dysfunction, blood-brain barrier disruption, and inflammation accompany chronic traumatic brain injury (TBI) and often contribute to long-term disabilities. One hallmark of both acute and chronic TBI is neuroinflammation. In acute stages, neuroinflammation is beneficial and stimulates an anti-inflammatory response to the damage. Conversely, in chronic TBI, excessive inflammation stimulates the aforementioned secondary cell death. Converting inflammatory cells from pro-inflammatory to anti-inflammatory may expand the therapeutic window for treating TBI, as inflammation plays a role in all stages of the injury. By expanding current research on the role of inflammation in TBI, treatment options and clinical outcomes for afflicted individuals may improve. This paper is a review article. Referred literature in this paper has been listed in the references section. The data sets supporting the conclusions of this article are available online by searching various databases, including PubMed. Some original points in this article come from the laboratory practice in our research center and the authors' experiences.

15.
High Alt Med Biol ; 18(3): 209-218, 2017 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-28459597

RESUMO

Hernández-Hernández, Magda Elena, Jaime Morales-Romero, Clara Luz Sampieri, Diego Jesús Luna Lozano, Isidra del Carmen Valencia Lezama, Mónica Janett Muñoz Contreras, and Arturo Rodríguez Hernández. Association of urinary activity of MMP-2 with microalbuminuria in an isolated sample of subjects living in high altitude rural locations in México. High Alt Med Biol. 18:209-218, 2017.-Matrix metalloproteinases (MMP) are implicated in remodeling of the renal extracellular matrix. In a cross-sectional study we evaluated renal impairment in general population of high-altitude rural locations in México. Multivariable analysis was performed to identify the association between MMP-2 and MMP-9 and microalbuminuria. Twenty-eight (20.9%) subjects with renal impairment (WRI) and 106 (79.1%) without renal impairment were included. No differences were found relating to sex, location, marital status, current habits, weight, height, body mass index, waist size in males, creatinine in males, and uric acid. In contrast, differences were found among age, level of education, waist size in general and in females, creatinine in general and in females, urinary albumin, urea, glucose, total cholesterol, and triglycerides. Proportions of hypertension, type 2 diabetes mellitus, central abdominal obesity, hypertriglyceridemia, and hypercholesterolemia were greater in the group WRI. Presence of urinary MMP-2 or of both urinary gelatinases and arbitrary unit (AU) values ≥P90 were associated with microalbuminuria. We conclude that AU values ≥P90 of urinary MMP-2 (OR = 20.1, p = 0.002) is associated with microalbuminuria.


Assuntos
Albuminúria/etiologia , Altitude , Metaloproteinase 2 da Matriz/urina , Metaloproteinase 9 da Matriz/urina , Adulto , Estudos Transversais , Feminino , Humanos , Masculino , México , Pessoa de Meia-Idade , Análise Multivariada , Fatores de Risco , População Rural
16.
MedUNAB ; 25(1): 52-58, 202205.
Artigo em Espanhol | LILACS | ID: biblio-1372542

RESUMO

Introducción. El dolor abdominal agudo es una causa frecuente de consulta en los servicios de urgencias. Su incidencia es alrededor del 5%, de los cuales el 10%- 25% de los pacientes requieren tratamiento quirúrgico. Las neoplasias apendiculares primarias son infrecuentes, actualmente representan 1% de las neoplasias malignas de origen gastrointestinal. Existe un predominio en mujeres y se debe sospechar en pacientes con factores de riesgo. El objetivo es entender la importancia del diagnóstico oportuno en el abordaje del paciente con dolor abdominal agudo. Presentación del caso. Mujer con cuadro clínico de 5 días de dolor abdominal, con hallazgo en tomografía de abdomen de marcada dilatación quística del apéndice cecal con calcificaciones lineales y nodulares en la pared y su interior. Intraoperariamente, se realizó hemicolectomía derecha con resultado histológico de neoplasia mucinosa del apéndice (adenoma serrado) con pérdida de la muscularis mucosae, catalogándolo como adenocarcinoma de bajo grado. Discusión. Los tumores apendiculares representan el 1% de las neoplasias malignas de origen gastrointestinal, son un hallazgo incidental (0.7-1.4%) en los procedimientos de apendicectomía. El diagnóstico es histopatológico y el pronóstico se relaciona con la clasificación. Es importante conocer, identificar y sospechar esta patología dada su infrecuencia, con lo cual se puede mejorar el pronóstico en los pacientes. Conclusión. Los tumores apendiculares son infrecuentes, los cuales deben ser incluidos en el grupo de patologías causantes de dolor abdominal agudo.


Introduction. Acute abdominal pain is a frequent cause of consultation to emergency services. Its incidence is about 5%, of which 10%-25% of patients require surgical treatment. Primary appendiceal neoplasms are infrequent. They currently represent 1% of malignant neoplasms of gastrointestinal origin. They are predominant in women and must be suspected in patients with risk factors. The objective is to understand the importance of timely diagnosis in approaching patients with acute abdominal pain. Case report. A woman with clinical condition of 5 days of abdominal pain. Marked cystic dilation of the cecal appendix with linear and nodular calcifications on its wall and interior found in a tomography of the abdomen. Intraoperatively, a right hemicolectomy was performed with a histological result of mucinous neoplasm of the appendix (serrated adenoma) with loss of the muscularis mucosae, classifying it as a low grade adenocarcinoma. Discussion. Appendiceal tumors represent 1% of malignant neoplasms of gastrointestinal origin, with an incidental finding (0.7-1.4%) in appendectomy procedures. The diagnosis is histopathological, and prognosis is related to its classification. It is important to know, identify and suspect this pathology due to its infrequency, which can improve the patient's prognosis. Conclusion. Appendiceal tumors are infrequent and should be included in the group of pathologies that cause acute abdominal pain.


Introdução. A dor abdominal aguda é causa frequente de consulta nos serviços de emergência. Sua incidência é em torno de 5%, dos quais entre 10% e 25% dos pacientes necessitam de tratamento cirúrgico. As neoplasias primárias de apêndice são raras, representando atualmente 1% das neoplasias malignas de origem gastrointestinal. Há predominância em mulheres e deve-se suspeitar em pacientes com fatores de risco. O objetivo é compreender a importância do diagnóstico oportuno na abordagem de pacientes com dor abdominal aguda. Relato de caso. Mulher com quadro clínico de dor abdominal por 5 dias, com achado tomográfico de abdome de dilatação cística acentuada do apêndice cecal com calcificações lineares e nodulares na parede e seu interior. No intraoperatório foi realizada hemicolectomia direita com resultado histológico de neoplasia mucinosa de apêndice (adenoma serrilhado) com perda da muscularis mucosae, classificando-a como adenocarcinoma de baixo grau. Discussão. Os tumores apendiculares representam 1% das neoplasias malignas de origem gastrointestinal, sendo um achado incidental (0.7-1.4%) em procedimentos de apendicectomia. O diagnóstico é histopatológico e o prognóstico está relacionado à classificação. É importante conhecer, identificar e suspeitar desta patologia dada a sua infrequência, o que pode melhorar o prognóstico dos pacientes. Conclusão. Os tumores apendiculares são pouco frequentes e devem ser incluídos no grupo de patologias que causam dor abdominal aguda.


Assuntos
Adenocarcinoma , Apêndice , Dor Abdominal , Diagnóstico Diferencial , Neoplasias Intestinais
17.
Oncotarget ; 8(59): 99740-99756, 2017 Nov 21.
Artigo em Inglês | MEDLINE | ID: mdl-29245937

RESUMO

The NLRP3-inflammasome complex has emerged as an important component of inflammatory processes in metabolic dysfunction induced by high-caloric diets. In this study, we investigate the molecular mechanisms by which NLRP3 inhibition may attenuate diet-induced cardiac injury. Here we show the cardiac damage induced by high sugar diet (HSD), high fat diet (HFD) or high sugar/fat diet (HSFD) over 15 weeks. Genetic ablation of NLRP3 protected against this damage by autophagy induction and apoptotic control. Furthermore, NLRP3 inhibition by the selective small molecule MCC950 resulted in similar autophagy induction and apoptotic control in hearts after diets. These data were reproduced in THP-1 cells treated with MCC950 and cultured in media supplemented with serum from mice dosed with MCC950 and fed with diets. NLRP3 inhibition exerted beneficial metabolic, and autophagic adaptations in hearts from obesogenic diets. The inhibition of NLRP3 activation may hold promise in the treatment of metabolic and cardiovascular diseases.

18.
J Healthc Inf Manag ; 20(4): 40-5, 2006.
Artigo em Inglês | MEDLINE | ID: mdl-17091789

RESUMO

As technology becomes more sophisticated in healthcare, there is increasing need to measure its impact on key quality indicators, such as error reduction, patient safety, and cost-benefit ratios. When a product is designed to decrease medical errors, the baseline error rate must be determined before implementation to accurately measure the impact. Given the opportunity to adopt a technology that would eliminate the need to manually document vital signs, a large Florida hospital decided to measure the current process and error rate of vital signs documentation. University Community Hospital in Tampa, Fla., designed a two-phase study to evaluate this process. Phase I of the study evaluated errors in the electronic medical record and traditional manual documentation. The results demonstrate that use of an EMR can reduce vital sign documentation errors by more than half compared with traditional manual documentation in paper charts. Researchers found the error rate for electronic vital signs documentation to be less than 5 percent, compared with the paper chart error rate of 10 percent.


Assuntos
Erros Médicos/prevenção & controle , Sistemas Computadorizados de Registros Médicos/organização & administração , Gestão da Segurança/organização & administração , Florida , Hospitais Universitários , Humanos , Estudos de Casos Organizacionais
19.
Interv Neurol ; 4(3-4): 75-82, 2016 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-27051402

RESUMO

Mechanical thrombectomy using retrievable stents or stent retriever devices has become the mainstay of intra-arterial therapy for acute ischemic stroke. The recent publication of a series of positive trials supporting intra-arterial therapy as standard of care for the treatment of large vessel occlusion will likely further increase stent retriever use. Rarely, premature stent detachment during thrombectomy may be encountered. In our multicenter case series, we found a rate of detachment of less than 1% (n = 7/1,067), and all were first-generation Solitaire FR devices. A review of the US Food and Drug Administration database of device experience yielded 90 individual adverse reports of detachment. There were 82, 1 and 7 detachments of Solitaire FR (first generation), Solitaire FR2 (second generation) and Trevo devices, respectively. We conclude with a brief overview of the technical and procedural considerations which may be helpful in avoiding this rare complication.

20.
Cell Transplant ; 24(4): 625-30, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25310691

RESUMO

We propose that stem cell therapy may be a potent treatment for metastatic melanoma in the brain. Here we discuss the key role of a leaky blood-brain barrier (BBB) that accompanies the development of brain metastases. We review the need to characterize the immunological and inflammatory responses associated with tumor-derived BBB damage in order to reveal the contribution of this brain pathological alteration to the formation and growth of brain metastatic cancers. Next, we discuss the potential repair of the BBB and attenuation of brain metastasis through transplantation of bone marrow-derived mesenchymal stem cells with the endothelial progenitor cell phenotype. In particular, we review the need for evaluation of the efficacy of stem cell therapy in repairing a disrupted BBB in an effort to reduce neuroinflammation, eventually attenuating brain metastatic cancers. The demonstration of BBB repair through augmented angiogenesis and vasculogenesis will be critical to establishing the potential of stem cell therapy for the treatment/prevention of metastatic brain tumors. The overarching hypothesis we advanced here is that BBB breakdown is closely associated with brain metastatic cancers of melanoma, exacerbating the inflammatory response of the brain during metastasis, and ultimately worsening the outcome of metastatic brain cancers. Abrogating this leaky BBB-mediated inflammation via stem cell therapy represents a paradigm-shifting approach to treating brain cancer. This review article discusses the pros and cons of cell therapy for melanoma brain metastases.


Assuntos
Células da Medula Óssea/citologia , Neoplasias Encefálicas/terapia , Transplante de Células-Tronco Mesenquimais , Células-Tronco Mesenquimais/citologia , Animais , Barreira Hematoencefálica/metabolismo , Terapia Baseada em Transplante de Células e Tecidos , Citocinas/metabolismo , Humanos , MicroRNAs/metabolismo
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