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1.
Waste Manag ; 174: 451-461, 2024 Feb 15.
Artigo em Inglês | MEDLINE | ID: mdl-38113670

RESUMO

Two samples of spent tire rubber (rubber A and rubber B) were submitted to thermochemical conversion by pyrolysis process. A450, B450 and A900, B900 chars were obtained from rubber A and rubber B at 450 °C and 900 °C, respectively. The chars were then applied as recovery agents of Nd3+ and Dy3+ from aqueous solutions in mono and bicomponent solutions, and their performance was benchmarked with a commercial activated carbon. The chars obtained at 900 °C were the most efficient adsorbents for both elements with uptake capacities around 30 mg g-1. The chars obtained at 450 °C presented uptake capacities similar to the commercial carbon (≈ 11 mg g-1). A900 and B900 chars presented a higher availability of Zn ions that favored the ion exchange mechanism. It was found that Nd3+ and Dy3+ were adsorbed as oxides after Zn was released from silicate structures (Zn2SiO4). A900 char was further selected to be tested with Nd/Dy binary mixtures and it was found a trend to adsorb a slightly higher amount of Dy3+ due to its smaller ionic radius. The uptake capacity in bicomponent solutions was generally higher than for single component solutions due to the higher driving force triggered by the higher concentration gradient.


Assuntos
Metais Terras Raras , Borracha , Borracha/química , Carvão Vegetal/química , Água , Adsorção
3.
Materials (Basel) ; 13(18)2020 Sep 22.
Artigo em Inglês | MEDLINE | ID: mdl-32972003

RESUMO

An experimental and theoretical investigation on microwave plasma-based synthesis of free-standing N-graphene, i.e., nitrogen-doped graphene, was further extended using ethanol and nitrogen gas as precursors. The in situ assembly of N-graphene is a single-step method, based on the introduction of N-containing precursor together with carbon precursor in the reactive microwave plasma environment at atmospheric pressure conditions. A previously developed theoretical model was updated to account for the new reactor geometry and the nitrogen precursor employed. The theoretical predictions of the model are in good agreement with all experimental data and assist in deeper understanding of the complicated physical and chemical process in microwave plasma. Optical Emission Spectroscopy was used to detect the emission of plasma-generated ''building units'' and to determine the gas temperature. The outlet gas was analyzed by Fourier-Transform Infrared Spectroscopy to detect the generated gaseous by-products. The synthesized N-graphene was characterized by Scanning Electron Microscopy, Raman, and X-ray photoelectron spectroscopies.

4.
Sci Rep ; 10(1): 13013, 2020 Aug 03.
Artigo em Inglês | MEDLINE | ID: mdl-32747630

RESUMO

The ability to change the secondary electron emission properties of nitrogen-doped graphene (N-graphene) has been demonstrated. To this end, a novel microwave plasma-enabled scalable route for continuous and controllable fabrication of free-standing N-graphene sheets was developed. High-quality N-graphene with prescribed structural qualities was produced at a rate of 0.5 mg/min by tailoring the high energy density plasma environment. Up to 8% of nitrogen doping levels were achieved while keeping the oxygen content at residual amounts (~ 1%). The synthesis is accomplished via a single step, at atmospheric conditions, using ethanol/methane and ammonia/methylamine as carbon and nitrogen precursors. The type and level of doping is affected by the position where the N-precursor is injected in the plasma environment and by the type of precursors used. Importantly, N atoms incorporated predominantly in pyridinic/pyrrolic functional groups alter the performance of the collective electronic oscillations, i.e. plasmons, of graphene. For the first time it has been demonstrated that the synergistic effect between the electronic structure changes and the reduction of graphene π-plasmons caused by N doping, along with the peculiar "crumpled" morphology, leads to sub-unitary (< 1) secondary electron yields. N-graphene can be considered as a prospective low secondary electron emission and plasmonic material.

5.
Rev Clin Esp ; 220(9): 587-591, 2020 Dec.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-32111440

RESUMO

Vascular disease is currently a major health problem, not only for its high prevalence but also for the considerable morbidity, mortality and disability that it entails. Medical internists play a central role in diagnosing and treating vascular disease and controlling the cardiovascular risk factors (CRFs) that cause it. In fact, the clinical care of patients in cardiovascular risk units is a specific characteristic of an internist's field of action. This article contains the consensus document for the training of residents in CRFs. This proposal by the Cardiovascular Risk Workgroup of the Spanish Society of Internal Medicine emerged as a response by our Society to the specific need for training in CRFs. Implementing this proposal would provide an important benefit, not only for medical internists in training but also for society as a whole.

6.
Phys Chem Chem Phys ; 22(8): 4772-4787, 2020 Feb 28.
Artigo em Inglês | MEDLINE | ID: mdl-32066999

RESUMO

Free-standing N-graphene was synthesized using a microwave plasma-based method at atmospheric pressure conditions through a single step and in a controllable manner. Using ethanol and ammonia as precursors, N-graphene with low relative amount of bonded oxygen and low level of saturated sp3 carbon bonds was produced. Adjusting the injection position of the nitrogen precursor in the plasma medium leads to selectivity in terms of doping level, nitrogen configuration and production yield. A previously developed theoretical model, based on plasma thermodynamics and chemical kinetics, was further updated to account for the presence of nitrogen precursor. The important role of HCN attachment to the graphene sheets as the main process of N-graphene formation is elucidated. The model predictions were validated by experimental results. Optical Emission Spectroscopy was used to detect the emission of plasma generated "building units" and to determine the gas temperature. The plasma outlet gas was analyzed by Fourier-Transform Infrared Spectroscopy to detect the generated gaseous by-products. The synthesized N-graphene was characterized by Scanning Electron Microscopy, Raman and X-ray photoelectron spectroscopies.

7.
Mater Sci Eng C Mater Biol Appl ; 103: 109819, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31349414

RESUMO

The composition and architecture of a scaffold determine its supportive role in tissue regeneration. In this work, we demonstrate the feasibility of obtaining a porous electrospun fibrous structure from biodegradable polyurethanes (Pus) synthesized using polycaprolactone-diol as soft segment and, as chain extenders, chitosan (CS) and/or dimethylol propionic acid. Fourier transform infrared spectroscopy and proton nuclear magnetic resonance confirmed the syntheses. Fibre mats' properties were analysed and compared with those of solvent cast films. Scanning electron microscopy images of the electrospun scaffolds revealed fibres with diameters around 1 µm. From tensile tests, we found that Young's modulus increases with CS content and is higher for films (2.5 MPa to 6.5 MPa) than for the corresponding fibre mats (0.8 MPa to 3.2 MPa). The use of CS as the only chain extender improves recovery ratio and resilience. From X-ray diffraction, a higher crystalline degree was identified in fibre mats than in the corresponding films. Films' wettability was enhanced by the presence of CS as shown by the decrease of water contact angle. X-ray photoelectron spectroscopy revealed that while ester groups are predominant at the films' surface, ester and urethanes are present in similar concentrations at fibres' surface, favouring the interaction with water molecules. Both films and fibres undergo hydrolytic degradation. In vitro evaluation was performed with human dermal fibroblasts. No PU sample revealed cytotoxicity. Cells adhered to fibre mats better than to films and proliferation was observed only for samples of CS-containing PUs. Results suggest that electrospun fibres of CS-based polyurethanes are good candidate scaffolds for soft tissue engineering.


Assuntos
Quitosana/química , Fibroblastos/citologia , Poliuretanos/química , Alicerces Teciduais/química , Ureia/análogos & derivados , Ureia/química , Varredura Diferencial de Calorimetria , Adesão Celular , Proliferação de Células , Dimetilformamida/química , Furanos/química , Humanos , Hidroxiácidos/química , Teste de Materiais , Espectroscopia Fotoeletrônica , Poliuretanos/síntese química , Propionatos/química , Solventes/química , Engenharia Tecidual/instrumentação , Engenharia Tecidual/métodos , Difração de Raios X
8.
Int J Biol Macromol ; 128: 902-910, 2019 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-30716374

RESUMO

The functionalization of cotton fabric with photoactive TiO2-Ag-AgBr nanostructured layer has been successfully developed using a low temperature non-aqueous sol-gel route and aqueous suspension of AgBr. Evidence for the growth of TiO2 layer and the immobilization of AgBr nanoparticles have been confirmed by Raman, XRD and XPS. GSDR analysis revealed a strong absorption in the visible region brought by surface Plasmon resonance (SPR) of Ag nanocrystals generated at the surface of AgBr. The XPS evidenced the presence of Ag+, Ag0 and bromine, suggesting that Ag0 formed a shell around the deposited AgBr. The immobilized TiO2-Ag-AgBr heterostructured layer imparts a strong photocatalytic activity under visible light for the degradation of dyes in aqueous solution as well as of dimethyl methylphosphonate (DMMP), a chemical warfare agent simulant. These new catalytically active functionalized fabrics, with self-detoxification properties, have great potential for application in chemical protective clothes and might offer new opportunities for the design of functional materials for toxic chemical protection.


Assuntos
Brometos/química , Corantes/química , Fibra de Algodão , Organofosfatos/química , Processos Fotoquímicos , Compostos de Prata/química , Prata/química , Titânio/química , Catálise , Corantes/isolamento & purificação , Nanoestruturas/química , Organofosfatos/isolamento & purificação , Organofosfatos/toxicidade , Temperatura , Água/química , Poluentes Químicos da Água/química , Poluentes Químicos da Água/isolamento & purificação , Purificação da Água
9.
Rev. clín. esp. (Ed. impr.) ; 218(9): 461-467, dic. 2018. tab, graf
Artigo em Espanhol | IBECS | ID: ibc-176261

RESUMO

Objetivo: Determinar la prevalencia de aneurisma de aorta abdominal (AAA), definido por un diámetro arterial ≥30mm, en pacientes con alto o muy alto riesgo cardiovascular (RCV) y evaluar sus características clínicas. Pacientes y métodos: Estudio observacional, transversal y multicéntrico realizado en servicios de Medicina Interna del país a varones con edad >55años y mujeres >65años que tenían un RCV alto o muy alto reclutados durante 24meses. Resultados: Se incluyeron 659 pacientes. La prevalencia de AAA fue del 8% (53 pacientes). El 76,9% fueron varones, con edad media de 71±8,7años. El análisis multivariante demostró asociación entre AAA y la edad (OR: 1,06; IC95%: 1,02-1,1; p<0,01), el sexo masculino (OR: 5,6; IC95%: 1,6-18,8; p=0,01), el tabaquismo activo (OR: 3,22; IC95%: 1,16-8,93; p=0,024) y la arteriopatía periférica (OR: 3,51; IC95%: 1,73-7,09; p<0,01), siendo la diabetes mellitus un factor protector independiente (OR: 0,41; IC95%: 0,22-0,78; p=0,06). Los pacientes con dilatación subaneurismática de la aorta (diámetro de la aorta abdominal 25-29,9mm) presentaban similares características que los pacientes con AAA. Conclusiones: La prevalencia de AAA en pacientes de alto RCV es elevada. El cribado ecográfico puede ser realizado por médicos generalistas. Pueden beneficiarse de un cribado oportunista los varones de más de 65años, con RCV elevado, especialmente si presentan tabaquismo activo o arteriopatía periférica


Background: To determine the prevalence of abdominal aortic aneurysm (AAA) (arterial diameter ≥30mm), in patients with high or very high cardiovascular risk (CVR) and to evaluate their clinical features. Patients and methods: Observational, cross-sectional and multicentric study conducted in Spanish Internal Medicine Services. We enrolled men with age >55years and women >65years who had a high or very high CVR. Results: The study included 659 patients. The prevalence of AAA was 8% (53 patients). 76.9% were male with a mean age of 71±8.7years. The multivariate analysis showed an association between AAA and age (OR: 1.06; 95%CI: 1.02-1.1; P<.01), male sex (OR: 5.6; 95%CI: 1.6-18.8; P=.01), active smoking (OR: 3.22; 95%CI: 1.16-8.93; P=.024) and peripheral arterial disease (OR: 3.51; 95%CI: 1.73-7.09; P<.01). Diabetes mellitus was an independent protective factor (OR: 0.41; 95%CI: 0.22-0.78; P=.06). Those with subaneurysmal dilatation of the abdominal aorta (diameter 25-29.9mm) presented similar features as patients with AAA. Conclusions: The prevalence of AAA in patients with high CVR is high. Ultrasound screening can be performed by general practitioners. Men >65years with elevated CVR could benefit, particularly in the presence of active smoking or peripheral arterial disease


Assuntos
Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Idoso , Programas de Rastreamento/métodos , Aneurisma da Aorta Abdominal/epidemiologia , Diagnóstico por Imagem/métodos , Fatores de Risco , Estudos Transversais , Aneurisma da Aorta Abdominal/diagnóstico por imagem , Hospitalização/estatística & dados numéricos , Dilatação Patológica/diagnóstico por imagem
10.
Rev Clin Esp (Barc) ; 218(9): 461-467, 2018 Dec.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-30243523

RESUMO

BACKGROUND: To determine the prevalence of abdominal aortic aneurysm (AAA) (arterial diameter ≥30mm), in patients with high or very high cardiovascular risk (CVR) and to evaluate their clinical features. PATIENTS AND METHODS: Observational, cross-sectional and multicentric study conducted in Spanish Internal Medicine Services. We enrolled men with age >55years and women >65years who had a high or very high CVR. RESULTS: The study included 659 patients. The prevalence of AAA was 8% (53 patients). 76.9% were male with a mean age of 71±8.7years. The multivariate analysis showed an association between AAA and age (OR: 1.06; 95%CI: 1.02-1.1; P<.01), male sex (OR: 5.6; 95%CI: 1.6-18.8; P=.01), active smoking (OR: 3.22; 95%CI: 1.16-8.93; P=.024) and peripheral arterial disease (OR: 3.51; 95%CI: 1.73-7.09; P<.01). Diabetes mellitus was an independent protective factor (OR: 0.41; 95%CI: 0.22-0.78; P=.06). Those with subaneurysmal dilatation of the abdominal aorta (diameter 25-29.9mm) presented similar features as patients with AAA. CONCLUSIONS: The prevalence of AAA in patients with high CVR is high. Ultrasound screening can be performed by general practitioners. Men >65years with elevated CVR could benefit, particularly in the presence of active smoking or peripheral arterial disease.

11.
Sci Rep ; 8(1): 12595, 2018 Aug 22.
Artigo em Inglês | MEDLINE | ID: mdl-30135558

RESUMO

Direct assembling of N-graphene, i.e. nitrogen doped graphene, in a controllable manner was achieved using microwave plasmas at atmospheric pressure conditions. The synthesis is accomplished via a single step using ethanol and ammonia as carbon and nitrogen precursors. Tailoring of the high-energy density plasma environment results in a selective synthesis of N-graphene (~0.4% doping level) in a narrow range of externally controlled operational conditions, i.e. precursor and background gas fluxes, plasma reactor design and microwave power. Applying infrared (IR) and ultraviolet (UV) irradiation to the flow of free-standing sheets in the post-plasma zone carries out changes in the percentage of sp2, the N doping type and the oxygen functionalities. X-ray photoelectron spectroscopy (XPS) revealed the relative extension of the graphene sheets π-system and the type of nitrogen chemical functions present in the lattice structure. Scanning Electron microscopy (SEM), Transmission Electron microscopy (TEM) and Raman spectroscopy were applied to determine morphological and structural characteristics of the sheets. Optical emission and FT-IR spectroscopy were applied for characterization of the high-energy density plasma environment and outlet gas stream. Electrochemical measurements were also performed to elucidate the electrochemical behavior of NG for supercapacitor applications.

12.
Carbohydr Polym ; 199: 31-40, 2018 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-30143134

RESUMO

Aiming the degradation of harmful molecules under visible light, new photocatalytic systems were created. For this purpose, the surface of chitosan thin films was modified in heterogeneous phase via a simple and straightforward mild chemical process: chemisorption of silver ions followed by the synthesis in situ of TiO2 at low temperature (100 °C). A high photocatalytic activity under visible light was observed, leading to the degradation and/or mineralization of different organic products such as o-toluidine, salicylic acid and 4-aminomethyl benzoic acid. This efficiency is partly attributed to the formation of Ag NPs and also to the unexpected appearance of AgCl NPs, likely formed from the residual chlorine contained in the chitosan. The resulting TiO2/Ag/AgCl/Chitosan system is easy to prepare under mild conditions, avoiding calcination treatments and opens new perspectives for the production of visible light-driven photocatalysts. Samples were analysed by different techniques: XRD, Raman, FE-SEM, XPS, TGA, GSDR, LIF and LIP.

13.
Carbohydr Polym ; 176: 336-344, 2017 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-28927616

RESUMO

A simple approach to functionalize cotton fabrics with Au and TiO2 nanostructured layer is presented. Hybrid fabrics (Cot-Au-TiO2) are prepared through reduction of AuCl4- on cotton, followed by a non-aqueous sol-gel procedure using tetrabutyltitanate and a hydrothermal treatment at 110°C. The generation of crystalline TiO2 is confirmed by Raman spectroscopy. The fibres morphology and their roughness are characterized by AFM and FE-SEM. XPS shows how the concentration of the NPs precursors (Au and TiO2) affects the layer composition. GSDR (Ground State Diffuse Reflectance Absorption Spectroscopy) and LIL (Laser induced luminescence) reveal a strong quenching effect induced by Au NPs. Photocatalytic activity measured through the Remazol Blue (RB) degradation reveals an enhancement under visible light, which increases with Au loading. This strong enhancement is explained through the surface plasmon resonance brought by Au NPs.

14.
Sci Rep ; 7(1): 10175, 2017 08 31.
Artigo em Inglês | MEDLINE | ID: mdl-28860575

RESUMO

One of the greatest challenges in the commercialization of graphene and derivatives is production of high quality material in bulk quantities at low price and in a reproducible manner. The very limited control, or even lack of, over the synthesis process is one of the main problems of conventional approaches. Herein, we present a microwave plasma-enabled scalable route for continuous, large-scale fabrication of free-standing graphene and nitrogen doped graphene sheets. The method's crucial advantage relies on harnessing unique plasma mechanisms to control the material and energy fluxes of the main building units at the atomic scale. By tailoring the high energy density plasma environment and complementarily applying in situ IR and soft UV radiation, a controllable selective synthesis of high quality graphene sheets at 2 mg/min yield with prescribed structural qualities was achieved. Raman spectroscopy, scanning electron microscopy, high resolution transmission electron microscopy, X-ray photoelectron spectroscopy and Near Edge X-ray-absorption fine-structure spectroscopy were used to probe the morphological, chemical and microstructural features of the produced material. The method described here is scalable and show a potential for controllable, large-scale fabrication of other graphene derivatives and promotes microwave plasmas as a competitive, green, and cost-effective alternative to presently used chemical methods.

15.
Carbohydr Polym ; 141: 229-37, 2016 May 05.
Artigo em Inglês | MEDLINE | ID: mdl-26877017

RESUMO

A green, safe and fast procedure is presented for in situ generation of nanoparticles (NPs) of cuprous oxide (Cu2O) onto cotton fibres at room temperature using water as a solvent. The method is based on a mild surface oxidation of cellulose fibres to generate in a controlled way carboxylic groups acting as a binding site for the adsorption of Cu(2+) via electrostatic coordination. Then, the adsorbed Cu(2+) ions were readly converted into Cu2O by dipping the treated cotton fibres into a aqueous solution of a reducing agent. Field-emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD), as well as UV-vis absorption and emission spectroscopic methods were used to analyse the size, morphology, chemical composition and the crystalline structure of the generated nanoparticles on the fabrics. The morphology of the ensuing Cu2O nanoparticles was shown to be dependent on the reduycing agent used. Antibacterial properties of the modified fibres were also investigated.


Assuntos
Antibacterianos/química , Cobre/química , Fibra de Algodão , Nanopartículas Metálicas/química , Celulose/análogos & derivados , Química Verde/métodos , Oxirredução
16.
Microsc Microanal ; 21 Suppl 5: 13-4, 2015 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-26227687
17.
J Phys Chem B ; 119(17): 5404-11, 2015 Apr 30.
Artigo em Inglês | MEDLINE | ID: mdl-25844940

RESUMO

This work stresses on damage at the molecular level caused by ultraviolet radiation (UV) in the range from 3.5 to 8 eV, deoxyribonucleic acid (DNA) films observed by X-ray photoelectron spectroscopy (XPS). Detailed quantitative XPS analysis, in which all the amounts are relative to sodium-assumed not to be released from the samples, of the carbon, oxygen, and particularly, nitrogen components, reveals that irradiation leads to sugar degradation with CO-based compounds release for energies above 6.9 eV and decrease of nitrogen groups which are not involved in hydrogen bonding at energies above 4.2 eV. Also the phosphate groups are seen to decrease to energies above 4.2 eV. Analysis of XPS spectra allowed to conclude that the damage on bases peripheral nitrogen atoms are following the damage on phosphates. It suggests that very low kinetic energy photoelectrons are ejected from the DNA bases, as a result of UV light induced breaking of the phosphate ester groups which forms a transient anion with resonance formation and whereby most of the nitrogen DNA peripheral groups are removed. The degree of ionization of DNA was observed to increase with radiation energy, indicating that the ionized phosphate groups are kept unchanged. This result was interpreted by the shielding of phosphate groups caused by water molecules hydration near sodium atoms.


Assuntos
Dano ao DNA , DNA/química , DNA/genética , Raios Ultravioleta/efeitos adversos , Ligação de Hidrogênio , Modelos Moleculares , Conformação de Ácido Nucleico , Espectroscopia Fotoeletrônica , Termodinâmica
18.
J Dairy Sci ; 97(3): 1852-61, 2014 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-24393176

RESUMO

Dairy farmers across Brazil were invited to participate in a study on silage production and utilization practices. Two hundred sixty farmers filled out a questionnaire, which was made available on a website. The questionnaire consisted of 14 questions, including information about the characteristics of the herd (n=3), the crop(s) used in the ensiling process, the use of additives, the harvest (n=3), the type of silo (n=1), aspects related to sealing (n=2), and management practices applied during feed-out (n=3). Farmers were also asked a final question about the main barriers they faced when producing and using silage. The main dairy-producing regions of Brazil had a strong influence on the number of participants. The profiles of farmers were heterogeneous and divided into 5 groups, which was considered a positive attribute of the study, allowing better analysis and assessment of current circumstances. Corn was the most widely grown crop for silage. Sorghum, tropical grasses, and sugarcane were the other species most cited. Additives were used by a small number of farmers (27.7%). Approximately 40% of farmers still depended on loaned equipment or outsourced services. The pull-type forage harvester was the main piece of equipment used on dairy farms (90.4%). Only 54.6% of respondents answered that they sharpen their harvester knives daily. Horizontal silos (bunker and stack) were the structures most commonly used to store silage. Most farmers sealed silos with double-sided plastic film (black-on-white) and with soil. However, almost one-fifth of all farmers still use black plastic. Manual removal of silage from the silos was practiced at most farms (i.e., the lack of equipment was also reflected in the stage of silage utilization). Disposal of spoiled silage before inclusion in the livestock feed was not a common practice on the farms. The main barriers encountered on the farms were lack of equipment, lack of manpower, and climatic variations. The results of this research may guide researchers, industries, extension workers, and governments to seek efficiency in milk production on farms using silage in the diet of livestock throughout the year or during part of the year in Brazil.


Assuntos
Indústria de Laticínios/métodos , Silagem , Animais , Brasil , Bovinos , Bases de Dados Factuais , Dieta/veterinária , Poaceae/química , Saccharum/química , Sorghum/química , Inquéritos e Questionários , Zea mays/química
19.
Rev. clín. esp. (Ed. impr.) ; 212(10): 475-481, nov. 2012. tab
Artigo em Espanhol | IBECS | ID: ibc-107474

RESUMO

Antecedentes y objetivo. Las guías de práctica clínica aconsejan conseguir concentraciones de colesterol LDL (cLDL) menor de 100mg/dl (y en ciertos casos menor de 70mg/dl) en pacientes con enfermedad coronaria y/o diabetes mellitus tipo 2 (DM2). Hemos examinado el cumplimiento de estos objetivos en enfermos atendidos en España con estas afecciones. Métodos. Estudio epidemiológico transversal. Los datos se obtuvieron en la visita del estudio o, en su defecto, a partir de datos que constaban en la historia clínica. Participaron 874 médicos de 17 comunidades autónomas de España. Se recogieron datos demográficos, factores de riesgo cardiovascular y tratamientos prescritos. Resultados. En el análisis final se incluyeron 6.988 pacientes (varones, 62,7%) de los cuales 2.586 (37%) tenían enfermedad coronaria, 2.654 (38%) DM2 y 1.748 (25%) ambas afecciones. El 65% tenían síndrome metabólico y la mediana de factores de riesgo vascular fue de 4. Un 57 y un 86% mostraron una concentración de cLDL>100 y>70 mg/dl, respectivamente. La proporción de pacientes con cLDL>100mg/dl fue un 4% superior en el grupo DM2 (62,4%) que entre los enfermos coronarios (57,1%; p<0,0001). La concentración de triglicéridos >150mg/dl fue superior entre los enfermos con DM2 (50,5%), que entre los enfermos coronarios (43,5%; p<0,0001). La proporción de pacientes con cLDL>70mg/dl fue similar en el grupo coronario y en el grupo DM2 (88,4 y 87,0%, respectivamente). Algo más de la mitad de los enfermos con afección coronaria (57,5%) o DM2 (55,7%) mostraron unos niveles de HDL inadecuados (varones, <40mg/dl; mujeres, <50mg/dl). Conclusiones. Más de la mitad de los pacientes con diabetes mellitus y/o arteriopatía coronaria incluidos en el estudio CODIMET no alcanzan el objetivo de colesterol LDL recomendado para pacientes de alto riesgo cardiovascular(AU)


Background and objective. Clinical practice guidelines recommend achieving concentrations of LDL cholesterol less than 100mg/dl (and in some cases less than 70mg/dl) in patients with coronary artery disease and/or diabetes mellitus type 2 (DM2). We have examined the compliance with these objectives in patients treated in Spain with these conditions. Methods. Cross-sectional epidemiological study. Data were obtained during the visit of the study or, in their absence, based on data contained in the medical record by 874 doctors of the 17 autonomous communities in Spain. Demographic information, risk factors, cardiovascular and prescribed treatments were collected. Results. In the final analysis 6.988 (62.7% male) patients were included. 2586 (37%) had coronary disease, 2654 (38%) DM2 and 1748 (25%) both conditions. 65% had metabolic syndrome. Vascular risk factors median number was 4. 57% and 86% showed a concentration of LDL cholesterol >100 and >70mg/dl respectively. The proportion patients with LDL concentration >100mg/dl was 4% greater in the DM2 (62.4%) than in coronary patients (57.1%; p0.0001). Concentration of triglycerides >150mg/dl was higher in patients with DM2 (50.5%) than in coronary patients (43.5%; p0.0001). The proportion of patients with LDL>70mg/dl was similar in the coronary group and in the DM2 Group (88.4% and 87.0%, respectively). More than half of patients with coronary heart disease (57.5%) or DM2 (55.7%) showed inadequate levels of HDL (<40mg/dl men; <50mg/dl women). Conclusions. More than a half of patients with diabetes mellitus and/or coronary artery disease enrolled in the CODIMET study do not achieve the recommended LDL cholesterol target for high cardiovascular risk patients(AU)


Assuntos
Humanos , Masculino , Feminino , Pessoa de Meia-Idade , LDL-Colesterol , LDL-Colesterol/uso terapêutico , Doença das Coronárias/epidemiologia , Diabetes Mellitus Tipo 2/complicações , Diabetes Mellitus Tipo 2/diagnóstico , Fatores de Risco , Síndrome Metabólica/complicações , Doença das Coronárias/complicações , Doença das Coronárias/fisiopatologia , Diabetes Mellitus Tipo 2/epidemiologia , Diabetes Mellitus Tipo 2/fisiopatologia , Estudos Transversais/métodos , Estudos Transversais/tendências , Intervalos de Confiança
20.
Rev Clin Esp ; 212(10): 475-81, 2012 Nov.
Artigo em Espanhol | MEDLINE | ID: mdl-23044423

RESUMO

BACKGROUND AND OBJECTIVE: Clinical practice guidelines recommend achieving concentrations of LDL cholesterol less than 100 mg/dl (and in some cases less than 70 mg/dl) in patients with coronary artery disease and/or diabetes mellitus type 2 (DM2). We have examined the compliance with these objectives in patients treated in Spain with these conditions. METHODS: Cross-sectional epidemiological study. Data were obtained during the visit of the study or, in their absence, based on data contained in the medical record by 874 doctors of the 17 autonomous communities in Spain. Demographic information, risk factors, cardiovascular and prescribed treatments were collected. RESULTS: In the final analysis 6.988 (62.7% male) patients were included. 2586 (37%) had coronary disease, 2654 (38%) DM2 and 1748 (25%) both conditions. 65% had metabolic syndrome. Vascular risk factors median number was 4. 57% and 86% showed a concentration of LDL cholesterol >100 and >70 mg/dl respectively. The proportion patients with LDL concentration >100 mg/dl was 4% greater in the DM2 (62.4%) than in coronary patients (57.1%; p0.0001). Concentration of triglycerides >150 mg/dl was higher in patients with DM2 (50.5%) than in coronary patients (43.5%; p0.0001). The proportion of patients with LDL>70 mg/dl was similar in the coronary group and in the DM2 Group (88.4% and 87.0%, respectively). More than half of patients with coronary heart disease (57.5%) or DM2 (55.7%) showed inadequate levels of HDL (<40 mg/dl men; <50 mg/dl women). CONCLUSIONS: More than a half of patients with diabetes mellitus and/or coronary artery disease enrolled in the CODIMET study do not achieve the recommended LDL cholesterol target for high cardiovascular risk patients.


Assuntos
LDL-Colesterol/sangue , Doença das Coronárias/sangue , Diabetes Mellitus Tipo 2/sangue , Fidelidade a Diretrizes/estatística & dados numéricos , Adulto , Idoso , Idoso de 80 Anos ou mais , Biomarcadores/sangue , Terapia Combinada , Doença das Coronárias/complicações , Doença das Coronárias/terapia , Estudos Transversais , Diabetes Mellitus Tipo 2/complicações , Diabetes Mellitus Tipo 2/terapia , Dietoterapia , Feminino , Humanos , Inibidores de Hidroximetilglutaril-CoA Redutases/uso terapêutico , Hipolipemiantes/uso terapêutico , Masculino , Pessoa de Meia-Idade , Guias de Prática Clínica como Assunto , Espanha , Resultado do Tratamento
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