20 research outputs found
The anaerobic digestion of pig carcase with or without sugar beet pulp, as a novel on-farm disposal method
Anaerobic digestion was investigated as a potential method for on-farm disposal of fallen stock (pig carcases), degrading the carcase material to produce biogas and digestate. The effects of feedstock (sugar beet pulp or pig carcase material or a 50:50 mix) and organic loading rate (50 g-TS L−1 or 100 g-TS L−1), during mesophilic (35 °C) anaerobic digestion were investigated. Anaerobic digestion was achieved for all experimental treatments, however the pig carcase material at the higher organic loading rate produced the second highest methane yield (0.56 Nm3 kg-VS−1 versus a range of 0.14–0.58 Nm3 kg-VS−1 for other treatments), with the highest percentage of methane in total biogas (61.6% versus a range of 36.1–55.2% for all other treatments). Satisfactory pathogen reduction is a legislative requirement for disposal of carcase material. Pathogens were quantified throughout the anaerobic digestion process. Enterococcus faecalis concentrations decreased to negligible levels (2.8 log10 CFU g-TS−1), whilst Clostridium perfringens levels remained unaffected by treatment throughout the digestion process (5.3 ± 0.2 log10 CFU g-TS−1)
Vidrios biomédicos y vitrocerámicas como sustitutos de los tejidos óseos
Nowadays, an important research topic related with medical devices are the materials designed as bone tissues substitutes. Hard tissues have a great capacity of self-regeneration but in front of traumatic or pathologic critical bone defects it is necessary the use of bone substitutes or templates as temporal or permanent grafts. Glasses or glass-ceramics are osteoconductive, osteoinductive and biocompatible materials. In addition, they have the ability to link directly to the living bone tissues without any interface (bioactivity). Also, it has been reported that bioglasses favor the angiogenesis process and the cellular adhesion, proliferation and differentiation necessary features for bone tissue engineering scaffolds. This work refers generalities of the bioactive glasses and glass-ceramics compositions, manufacture processes, properties, advantages, disadvantages as well as the main clinical applications and new developments for tissue engineering
Study of angulations of visceral abdominals arteries in their abdominal aorta emergency
Recently, fenestrated, branched and stent grafts have been developed in order to treat endovascular aneurysmal pathology at the level of the aorta in the emergence of the visceral arteries. For the implantation of stents, it is necessary to have a precise planimetry of the origin and orientation of the visceral branches in order firstly to perform the correct manufacture of the endoprosthesis and secondly the placement with precision of the same. The knowledge of the emergency of the vessels of the aortic wall and its orientation knowing the angle of emergency. The data obtained for the planning of the endovascular treatment of 37 patients in order to obtain data from the descriptive point of view of this sector
Instrumentation of a bicycle without driver for experimental testing of automatic control
Endovascular Treatment is an Accurate Option for Aortoenteric Secondary Fistulae in TASC D Patients
Effect of Postoperative Restrictive Fluid Therapy in the Recovery of Patients with Abdominal Vascular Surgery
Endovascular Treatment is an Accurate Option for Aortoenteric Secondary Fistulae in TASC D Patients
Beneficial effect of nutrisimZapotitlán against LPS-induced liver injury: Oxidative stress markers and mitochondrial ATP-ase activity
Sepsis is a systemic host response which implicates an inflammatory state due to a bacterial infection and involving1 multiple organ failure. In order to modulate this systemic reaction, liver plays a pivotal role due to its central contribution in metabolism and host defense mechanism. The process of sepsis as an inflammatory condition results in the production of free radicals, in some cases induced by lip op oly saccharide which conducts to oxidative damage and mitochondrial impairment; these alterations may contribute to the pathophysiology of septic shock. The use of antioxidants in the treatment of this pathology reduces mitochondrial damage and oxidative stress, therefore in this study, treatment with NutrisimZapotitlán a nutritive supplement used empirically in the treatment of several degenerative disorders was tested in biochemical parameters indicative of oxidative stress and mitochondrial ATPase activity in rat liver mitochondria damage-induced by LPS. The results showed that treatment with NutrisimZapotitlán 30 min prior or after the LPS challenge significantly attenuates the end-products of lipid oxidation (p<0.05), restores total antioxidant capacity, the membrane fluidity and preserves ATPase activity. In conclusion, NutrisimZapotitlán administration prior or after LPS damage, ameliorates liver damage. Therefore, the beneficial effects of NutrisimZapotitlán against oxidative stress and ATPase activity in rat liver mitochondria presented in this study may suggest a potential chemoprotective effect in sepsis prevention. Zapotitlán 2013 Academic Journals Inc
Mixoma intramuscular inguinal y compresión de elementos vasculonerviosos femorales
Introducción. La tumoraciones no pulsátiles inguinales son tratadas por cirujanos vasculares por su relación con los vasos femorales. El mixoma intramuscular es un caso raro de tumor benigno con tendencia a la compresión de las estructuras vecinas y con potencial de recidiva local. La resección completa con márgenes amplios es el tratamiento indicado para ellos. Caso clínico. Varón de 57 años. Clínica de parestesias en cara anteriomedial del muslo izquierdo, ausencia de patología vascular en la extremidad afectada. En la exploración, se palpa una masa inguinal bien delimitada, blanda, compresible, no fluctuante, adherida a planos profundos, no dolorosa a la palpación, de 10 cm de diámetro. En el estudio radiológico mediante tomografía axial computarizada y resonancia magnética, se demuestra una colección líquida de contorno liso y bien definido, en íntimo contacto con el músculo psoasilíaco que se prolonga por encima del anillo inguinal con imagen en ¿reloj de arena¿ con desplazamiento de vasos femorales y sospecha diagnóstica de bursitis. Tras la resección quirúrgica, el estudio anatomopatológico es compatible con el diagnóstico de mixoma intramuscular. Conclusión. Se trata de la primera descripción en la literatura de este tumor en esta localización anatómica y con la forma en ¿reloj de arena¿ a través del anillo inguinal. Constituye una posibilidad a tener en cuenta en tumores de partes blandas en la región inguinal
Valor diagnóstico de la ecografía Doppler color en el control clínico de la reparación endovascular de los aneurismas de aorta abdominal
Introducción. El control clínico del tratamiento endovascular de la enfermedad aneurismática de la aorta abdominal se basa en la valoración de la evolución del tamaño del aneurisma, la permeabilidad de la endoprótesis y la detección de fugas. Objetivo. Comparar la ecografía Doppler (ED) color con la tomografía axial computarizada (TAC) en la evaluación del tamaño del aneurisma y la detección de fugas en el tratamiento endovascular de aneurismas de aorta abdominal. Pacientes y métodos. Estudio prospectivo entre enero y diciembre de 2005. En 14 pacientes sometidos a tratamiento endovascular se realizó ED color y TAC a 1, 6 y 12 meses. Se compararon los tamaños del aneurisma mediante la prueba t para muestras dependientes y estudio de correlación. Sensibilidad, especificidad, valor predictivo positivo y valor predictivo negativo y el coeficiente de concordancia kappa se calcularon para la detección de fugas. Resultados. El control clínico medio fue de 9,4 meses y se compararon 49 exploraciones. El diámetro medio del aneurisma a los tres meses de control clínico fue de 51,2 cm con ED color y de 52,5 cm con TAC (p = no significativo). El coeficiente de correlación ascendió a 0,97 (p < 0,001). Todos los dispositivos se mantuvieron permeables. En detección de fugas, el estudio ED color obtuvo una sensibilidad, especificidad, valor predictivo positivo y valor predictivo negativo de 75, 61, 20 y 95%, respectivamente (kappa = 0,61). Conclusiones. El estudio ED color obtiene una excelente correlación con la TAC en la medida del tamaño de los aneurismas. En cambio, posee un valor predictivo positivo muy bajo para la detección de fuga