Actualización en el tratamiento de la cadera degenerativa en el adulto joven

El tratamiento de la patología degenerativa de la cadera en el adulto joven es un desafío para el cirujano ortopeda dadas las expectativas de función y calidad de vida que solicitan estos pacientes. En la última década se ha experimentado un cambio hacia la implantación de técnicas quirúrgicas de preservación de la articulación. La selección adecuada de los pacientes candidatos a estas técnicas nos permitirá obtener excelentes resultados y retrasar la necesidad de la cirugía protésica. La prótesis total de cadera sigue siendo la técnica de elección en los pacientes jóvenes con enfermedad degenerativa moderada o severa, aunque es necesario una mejora en los biomateriales y pares de fricción para aumentar la supervivencia del implante y la percepción de calidad de vida por parte del pacienteThe orthopaedic treatment of young patients with hip osteoarthritis is a challenge for the orthopaedic surgeon, as young patients have higher expectation for function and quality of life. Surgical treatment has evolved to joint preservation surgery in the past decade. The proper selection of patients for these techniques allows us to obtain excellent results and delay the need for prosthetic surgery. Total hip replacement is the technique of choice in young patients with moderate or severe hip osteoarthritis. Improvement in biomaterials and bearing surfaces are required to improve the prosthesis survival rates and the quality of life of these patient

Autopistas de la información. Aplicación en cirugía ortopédica

El término autopistas de información describe los servicios de telecomunicaciones que estarán disponibles dentro de 10-15 años. El embrión de estas autopistas es Internet. Internet ofrece 2 clases de servicios: a) comunicación entre usuarios de todo el mundo, y b) acceso a servicios de información. En el primer grupo de estos servicios encontramos el correo electrónico y los grupos de discusión. En el segundo podemos encontrar servicios como logon remoto, transferencia de ficheros, Gopher o WWW. Describimos cada uno de estos servicios y su aplicación a la ortopedia.Information highway describes the telecomunication services will be working in the next 10-15 years. The embryo of this highway is Internet. Internet offers two kinds of services: a) communication between users around the worid, and b) access to information services. In the first group of this services we can find electronic mail and news group. In the second group we can find services such as telnet, file transfer, Gopher and World Wide Web. We describe each of this kind of services and their applications in orthopaedic surgery

Características palinológicas del Cretácico Superior y del tránsito Cretácico-Terciario en los Pirineos Sur-Centrales

XV lnternational A.P.L.E. Symposium of Palynolog

Fracturas diafisarias de húmero en adultos: estudio retrospectivo de 53 casos

Se estudian retrospectivamente 53 pacientes adultos con fractura diafisaria de húmero, 36 de los cuales siguieron el tratamiento ortopédico funcional. En otros 17 casos, pacientes politraumatizados o con fracturas de tercio medio transversas, realizamos tratamiento quirúrgico. La edad media de los pacientes fue 48 ± 2 2 años. Se afectó más el lado derecho, siendo el antecedente etiológico más frecuente el accidente casual. No hubo diferencia entre el tiempo de consolidación con el tratamiento ortopédico-funcional (60 ± 14 días) y el tratamiento quirúrgico (56 ±1 2 días). Como complicaciones hubo 7 pseudoartrosis (4 tras tratamiento ortopédico-funcional y 3 tratamiento quirúrgico). La edad media de los pacientes con pseudoartrosis fue superior a la de los pacientes con consolidación completa. Ocho casos cursaron con lesión del nervio radial, obteniendo una recuperación funcional del 100% en un tiempo medio de 38 ± 30 semanas. Valorando los resultados con arreglo a los criterios de Gayet, hemos obtenido un 80% de buenos y muy buenos resultados con tratamiento ortopédico funcional y un 70% con tratamiento quirúrgico.Fifty three adult patients with fracture of the humeral shaft were retrospectively studied. Orthopaedic-functional treatment was applied in 36 cases. Seventeen patients with either multiple injuries or transverse middle-shaft fractures were surgically treated. The mean age of patients was 48 ± 21 years. Right side was most frecuently affected and casual fall was the predominated etiology. There were no differences regarding the average consolidation period between fractures treated conservatively (60 ± 14 days) and those undergoing surgery (56 ± 12 days). As complications, there were 7 monounions (4 conservative and 3 operative treatment). The mean age of patients with non-unions was higther than those with complete fracture consolidation. Radial nerve injury was seen in 8 cases. In all there patients, a complete functional were recovery was obtained with a mean average time of 38 ± 30 weeks. When evaluating functional results according to Gayet, satisfactory results were found in 80 per cent of patients with conservative treatment and 70 per cent of those surgically treated

Aplasia del arco posterior del Atlas

Las anomalías congénitas del arco posterior del Atlas son poco frecuentes. Se presenta el caso de una paciente, que tras sufrir un accidente se diagnosticó de aplasia parcial del atlas. Esta lesión es considerada como una variante anatómica benigna de la región cráneovertebral. Se expone el desarrollo y el significado de esta anomalía.Congenital anomalies of the posterior arch of the atlas are uncommon. This paper presents the case of a patient who, as result of an accident, was diagnosed as having a congenital partial agenesia of the posterior arch of the atlas. This finding is considered as a benign anatomical variation of the craniovertebral junction region. The development and clinical significance of this anomaly are discussed

Solubility of gases in fluoroorganic alcohols. Part III. Solubilities of several non-polar gases in water¿+¿1, 1, 1, 3, 3, 3-hexafluoropropan-2-ol at 298.15¿K and 101.33¿kPa

Solubilities of the non-polar gases H2, N2, O2, CH4, C2H6, C2H4, CF4, SF6, and CO2 in the mixture (water + 1, 1, 1, 3, 3, 3-hexafluoropropan-2-ol) at the temperature of 298.15 K and 101.33 kPa partial pressure of gas are reported. A polynomial dependence of the solubilities on the molar fraction of the binary liquid mixture is found. The Henry''s constants at the vapor pressure of water, the standard changes in the Gibbs energy for the solution process and for the solvation process, and the so-called excess Henry''s constant are calculated. The results have been compared with those obtained by Scaled Particle Theory (SPT). A method to compare the solubility of a gas in different liquids is proposed and applied to 2, 2, 2-trifluoroethanol and 1, 1, 1, 3, 3, 3-hexafluoropropan-2-ol

Biopesticide activity from drimanic compounds to control tomato pathogens

Indexación: Scopus.Tomato crops can be affected by several infectious diseases produced by bacteria, fungi, and oomycetes. Four phytopathogens are of special concern because of the major economic losses they generate worldwide in tomato production; Clavibacter michiganensis subsp. michiganensis and Pseudomonas syringae pv. tomato, causative agents behind two highly destructive diseases, bacterial canker and bacterial speck, respectively; fungus Fusarium oxysporum f. sp. lycopersici that causes Fusarium Wilt, which strongly affects tomato crops; and finally, Phytophthora spp., which affect both potato and tomato crops. Polygodial (1), drimenol (2), isonordrimenone (3), and nordrimenone (4) were studied against these four phytopathogenic microorganisms. Among them, compound 1, obtained from Drimys winteri Forst, and synthetic compound 4 are shown here to have potent activity. Most promisingly, the results showed that compounds 1 and 4 affect Clavibacter michiganensis growth at minimal inhibitory concentrations (MIC) values of 16 and 32 μg/mL, respectively, and high antimycotic activity against Fusarium oxysporum and Phytophthora spp. with MIC of 64 μg/mL. The results of the present study suggest novel treatment alternatives with drimane compounds against bacterial and fungal plant pathogens. © 2018 by the authors.https://www.mdpi.com/1420-3049/23/8/205

Transesterification of rapeseed oil with methanol in the presence of various co-solvents

Comunicação apresentada no «Third International Symposium on Energy from Biomass and Waste», Venice(Italy), Novembro 2010In this study, transesterification of rapeseed oil using various co-solvents(diethyl ether (DEE), dibutyl ether (diBE), tert-butyl methyl ether (tBME), diisopropyl ether (diIPE), tetrahydrofuran (THF), and acetone) was studied. The variables affecting the ester yield during transesterification reaction, such as catalyst content, methanol:oil molar ratio, methanol:cosolvent molar ratio, co-solvent type, catalysts type, agitation rate and reaction temperature were investigated. The process was monitored by gas chromatography, determining the concentration of the methyl esters. Biodiesel was characterized according to ISO norms. Among the studied co-solvents, the DEE and tBME take to the best results, however diIPE, diBE and acetone hardly improve the obtained results using only methanol. Within the range of studied variability, the rest of variables do not exercise a very significant influence. The best results are obtained with 0.7 % of KOH, a molar ratio methanol/oil of 9:1, a molar ratio co-solvent/methanol 1:1, an agitation rate of 700 rpm and a temperature of 30 º

Thermophysical and volumetric study of mixtures {p-cymene¿+¿propan-1-ol} at several temperatures and atmospheric pressure. Modeling with COSMO-RS

Experimental isobaric molar heat capacities at atmospheric pressure have been determined for the mixture {p-cymene + propan-1-ol} every 10 K in the temperature interval (298.8–328.5) K and over the entire composition range with a Calvet type calorimeter. Densities, necessary for calculating heat capacities, have been also measured in similar conditions. Excess molar volumes have been calculated from densities. They are positive at (318.15 and 328.15) K and sigmoidal at (298.15 and 308.15) K with negative values in the zone very rich in propan-1-ol. Excess molar heat capacities have been calculated from the molar heat capacities and show positive values. Both excess molar properties increase as the temperature rises at a given molar fraction. Excess properties are discussed in terms of intermolecular interactions. The solvation model COSMO-RS has been applied to predict the excess molar heat capacities, being the quantitative predictions rather poor

Síndrome del túnel tarsiano: a propósito de un caso

El Síndrome del túnel tarsiano está causado por el atrapamiento del nervio tibial posterior o sus ramas a nivel del retináculo flexor en el tobillo. Se describe un caso de síndrome de túnel tarsiano causado por un quiste sinovial. El paciente refería dolor desde hacía 1 mes a nivel retromaleolar irradiado a planta del pie y primer dedo. Al mes de iniciado los síntomas se apreció una tumoración a nivel retromaleolar. Se exponen los hallazgos EMG, ecografía y R.M.N. Cuando la causa de esta entidad es una lesión ocupante de espacio, está indicada la cirugía, siendo el pronóstico mejor cuanto más precoz es la intervención.Tarsal tunnel syndrome is an entrapment neuropathy caused by compression of the posterior tibial nerve or one of its branches beneath the ankle flexor retinaculum. We present a case of tarsal tunnel syndrome caused by synovial cyst. Since one month the patient complained about pain retromaleolarly radiating to the sole of the foot and first toe. At retromaleolar level a mass was found one month after the onset of symptoms. We report the E.M.G., ultrasonography and R.N.M. findings. When the cause of this syndrome is a space-occupying lesion surgery is indicated. The results of surgery are worse when operation is delayed