Aportación de la densitometría ósea en las artroplastias de rodilla

El presente trabajo consiste en una revisión clínica y radiológica de 84 artroplastias modulares de rodilla de las cuales, en 19 se ha estudiado la masa ósea periprotésica (7 cementadas y 12 sin cementar) antes, al mes y a los seis meses de la intervención mediante un densitómetro de doble fotón. Aparte, se ha probado la correlación directa entre la indicación peroperatoria de no cementar y una mayor masa ósea en todas las zonas periprotésicas; por otro lado, se ha observado una diferente distribución de la densidad mineral ósea en la tibia tras la intervención, según se haya utilizado o no cemento. Estos hallazgos confirman el estudio densitométrico previo a la intervención como un método complementario útil en la indicación de la cementación de la artroplastia total de rodilla.A clinical and radiological revision of 84 modular knee arthroplasties is presented. Periprosthesis bone mineral content was studied in 19 prostheses (7 cemented and 12 uncemented) before, surgery one and 6 months after the intervention using a densitometer of double energy. A direct correlation between the implantation of a non-cemented prosthesis and the growth of the bone mass in all the periprosthesis areas was found, existing a different distribution of the mineral bone density of the tibia after the intervention depending on the use of cement. These findings show that the densitometric study previous to an intervention as a useful complementary method in the indication of cemented total knee arthroplasty

Estudio comparativo de la fijación con o sin cemento en Prótesis Total de Rodilla

Revisamos retrospectivamente una serie de 86 pacientes portadores de 110 prótesis totales modulares de rodilla colocadas como tratamiento de la gonartrosis. Se analizan los resultados obtenidos en los pacientes a los que se le realizó una fijación híbrida cementada (componente femoral no cementado y componente tibial y patelar cementado) respecto a los que se le realizó una prótesis de anclaje biológico sin ningún tipo de cementación. El análisis de la función clínica, movilidad de la rodilla, estudio radiológico y complicaciones de ambas series no demuestran diferencias significativas entre ambos grupos con un periodo de seguimiento de 45 meses (r=12-60).We have retrospectively review 86 patients with 110 total knee arthroplasty for the treatment of osteoarthrosis. We have analyzed the results obtained in a group of patients with partial fixation with cement and another group fixated without any cement. Clinical and radiological results and complications in both groups were similar without significant differences with an average follow-up of 45 months (12-60)

Experiencia a medio plazo con prótesis total de rodilla semiconstreñida

Revisamos 25 prótesis totales de rodilla semiconstreñidas tipo Endo-Model Waldemar- Link implantadas en 23 pacientes con una edad media de 69,5 años y un seguimiento medio de 32 meses. Para la evaluación de los resultados clínicos hemos utilizado el protocolo de la Academia Americana en el que se incluyen los parámetros de: dolor, capacidad para la marcha, facilidad para subir y bajar escaleras, necesidad o no de bastones y flexoextensión de la articulación, tanto antes como después de la intervención. Asimismo hemos realizado un estudio radiológico de las prótesis en el que se ha valorado el centraje de los componentes protésicos en dos planos AP y L y las imágenes líticas periprotésicas. Los resultados obtenidos han sido satisfactorios observando en la totalidad de los pacientes una disminución del dolor y un aumento de su capacidad funcional. En ningún caso se han observado infecciones profundas de la prótesis. Se ha comprobado un aumento en el arco de flexión en las prótesis en que la punta del vástago femoral estaba desviada hacia la cortical anterior, sin que esto se acompañase de un déficit en la extensión.We have reviewed 25 total knee prosthesis (Endo-Model type, Waldemar-Link) performed in 23 patients with an age average of 69,5 years-old and a average follow-up of 32 months. The clinical assessment applied was the AAOS protocol including the parameters of: pain, ability to go up and down the stairs, to need of sticks, flexion and extension of the joint, before and after the operation. In the radiological study we have evaluated the correct alignment of the components in two planes A-P and L, and the periprosthetic lucencies. The results obtained have been satisfying in all the patients with a diminution of the pain and better function of the joint. No deep infection was observed and the flexion was better in prosthesis with anterior deviation of the femoral rod in the lateral plane

Estudio de la marcha en pacientes tratados ortopédicamente de fractura unilateral del calcáneo

Veinticinco pacientes afectos de fractura unilateral desplazada articular de calcá- neo fueron tratados mediante inmovilización con yeso, siendo los resultados a los 6 años (rango: 3-10), excelentes en 5 pacientes, buenos en 4, regulares en 7 y malos en 9. De este grupo se excluyeron los afectos de patología local o general asociada, siendo útiles para el estudio de la marcha 12 pacientes a los que se les hizo deambular sobre plataformas dinamométricas para registrar la fuerza de reacción al suelo, demostrando una disminución de la fuerza vertical de apoyo y despegue (F1 y F3) y un aumento estadísticamente significativo del tiempo de apoyo total durante la marcha. Abogamos por la restitución anatómica del calcáneo como medio para mejorar la capacidad funcional del paciente.Twenty-five patients with unilateral displaced joint calcaneus fracture were treated by cast being the results after 6 years (range: 3-10), excellent in 5 patients, good in 4 patients, poor in 7 and bad in 9. We excluded for the study the patients with associated local or general pathology being useful for our study 12 patients. These patients walked on a dynamometric platform in order to analyse floor reaction forces, proving a diminuí ion of vertical support and takeoff forces (Fl and F2), and statistically significant a increase of total support phase during gait

Analyzing and Modeling Real-World Phenomena with Complex Networks: A Survey of Applications

The success of new scientific areas can be assessed by their potential for contributing to new theoretical approaches and in applications to real-world problems. Complex networks have fared extremely well in both of these aspects, with their sound theoretical basis developed over the years and with a variety of applications. In this survey, we analyze the applications of complex networks to real-world problems and data, with emphasis in representation, analysis and modeling, after an introduction to the main concepts and models. A diversity of phenomena are surveyed, which may be classified into no less than 22 areas, providing a clear indication of the impact of the field of complex networks.Comment: 103 pages, 3 figures and 7 tables. A working manuscript, suggestions are welcome

Erratum to: 36th International Symposium on Intensive Care and Emergency Medicine

[This corrects the article DOI: 10.1186/s13054-016-1208-6.]

A922 Sequential measurement of 1 hour creatinine clearance (1-CRCL) in critically ill patients at risk of acute kidney injury (AKI)

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How do life-history traits influence the fate of intertidal and subtidal Mytilus galloprovincialis in a changing climate?

7 pages, 4 figuresCoastal organisms (i.e. intertidal or upper subtidal species) live in between the terrestrial and aquatic realms, making them particularly vulnerable to climate change. In this context, intertidal organisms may suffer from the predicted sea level rise (increasing their submerged time) while subtidal organisms may suffer from anthropically-induced hypoxia and its consequences. Although there is some knowledge on how coastal organisms adapt to environmental changes, the biochemical and physiological consequences of prolonged submergence periods have not yet been well characterized. Thus, the present study aimed to assess the biochemical alterations experienced by intertidal organisms maintained always under tidal exposure (IT); intertidal organisms maintained submersed (IS); subtidal organisms maintained always submersed (SS); subtidal organisms under tidal exposure (ST). For this, Mytilus galloprovincialis specimens from contiguous intertidal and subtidal populations were exposed to the above mentioned conditions for twenty-eight days. Results indicated that both intertidal and subtidal mussels are adapted to the oxidative stress pressure caused by tidal and submerged conditions tested. Intertidal mussels did not seem to be negatively affected by submergence while ST specimens were energetically challenged by tidal exposure. Both IT and ST mussels consumed glycogen to fuel up mechanisms aiming to maintain redox homeostasis. Overall, both intertidal and subtidal populations were capable of coping with tidal exposure, although the strategies employed differed between them. These findings indicate that although IT mussels may not significantly suffer from the longer-term submergence, hypoxic events occurring in the context of global warming and other anthropogenic impacts may have consequences on both IT and ST populations. Altogether, it is important to highlight that tides may act as a confounding factor in experiments concerning coastal organisms, as it causes additional physiological and biochemical perturbationsMadalena Andrade benefited from a PhD grant (SFRH/BD/143422/2019) given by the National Funds through the Portuguese Science Foundation (FCT). Rosa Freitas was funded by national funds (OE), through FCT, in the scope of the framework contract foreseen in the numbers 4, 5 and 6 of the article 23, of the Decree-Law 57/2016, of August 29, changed by Law 57/2017, of July 19. This work was financially supported by the project BISPECIAl: BIvalveS under Polluted Environment and ClImate chAnge PTDC/CTA-AMB/28425/2017 (POCI-01-0145-FEDER-028425) funded by FEDER, through COMPETE2020 - Programa Operacional Competitividade e Internacionalização (POCI), and by national funds (OE), through FCT/MCTES. Thanks are due for the financial support to CESAM (UIDB/50017/2020+UIDP/50017/2020). The authors also acknowledge to the RED RIESCOS - Evaluación de los Efectos de los Contaminantes Emergentes en Organismos Acuáticos y sobre la Salud Humana, from the Programa Iberoamericano de Ciencia y Tecnología para el Desarrollo (CYTED) with reference 419RT0578, and to the Integrated Programme of SR&TD “Smart Valorization of Endogenous Marine Biological Resources Under a Changing Climate” (reference Centro-01-0145-FEDER-000018), co-funded by Centro (2020) program, Portugal 2020, European Union, through the European Regional Development FundWith funding from the Spanish government through the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S)Peer reviewe