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Radical Vaginal Hysterectomy and Trachelectomy in Early-Stage Cervical Cancer

Open Journal of Obstetrics and Gynecology 2014年第8期4卷 491-496页

作者： erasmo bravo Catalina Alonso Montemurro Sergio Rojas Sepulveda Jaime Cartagena Bustamante Hector Pinto Oncologic Gynecology Unit Gustavo Fricke HospitalViña del MarChile Oncologic Gynecology Unit Van Buren HospitalValparaísoChile Department of Gynecology and Obstetrics University of ValparaísoValparaísoChile

Objective: To communicate a minimally invasive technique for surgical handling of early-stage cervical cancer and its results. Methods: 110 patients with cervical cancer in stages IA2 and IB1, all of them operated in a period of 5 years in both hospitals, are presented. Laparoscopic systemic pelvic lymphadenectomy with radical vaginal hysterectomy or radical vaginal trachelectomy was performed to patients, with the exception of those patients who had compromised nodes detected in contemporary biopsy. Results: Between April 2008 and May 2013, 110 patients were submitted to this technique. 15 patients had their surgery aborted: 13 presented positive nodes for carcinoma in contemporary biopsy and 2 had extensive cervical compromise when performing radical vaginal hysterectomy or trachelectomy. Analysis of the remaining 95 cases shows an average age of 43.9 years (26 - 61), all of them had given birth before, 23 (21%) of them through C-section. BMI averaged 30.5 and 31 (28.2%) had cone surgery performed previously. Average duration of surgery was of 220 minutes. Postoperative hospitalization averaged 3.1 days. Bleeding volume was estimated at 125 cc and one patient required blood transfusion. En 25 patients’ uterine annexes were kept and all of them were suspended by means of laparoscopy. On average, 25.4 pelvic nodes were obtained. Complications 13.6% with eight patients suffered bladder injury, two had rectovaginal fistula, 3 patients requires surgical repair of ureteral obstruction, two patients present thromboembolic disease. The disease-free and overall survivals are consistent with reports in the literature. Conclusion: We believe that handling patients with this technique is possible and has the advantages of vaginal and laparoscopic surgery with minimal complications.

关键词： Radical Vaginal Hysterectomy Radical Vaginal Trachelectomy Early-Stage Cervical Cancer

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Coalbed Methane Potential in the Basin Guardo-Barruelo (North Spain)

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Journal of Power and Energy Engineering 2019年第1期7卷 1-18页

作者： Jose A. Gutierrez bravo Raquel Garcia erasmo Cadena Department of Mining Engineering Universidad de León Campus de Vegazana León Spain

Coal during its carbonization process produces a gas, which, mainly formed by methane, can be used. The use of CBM (Coal bed methane) as an energetic resource is not much known in Spain. This work is the first step to enhance the development of this resource in Castilla y León Guardo-Barruelo basin. A review of the state of the art is introduced, taking into account all the factors that can influence in the development of a CBM project. Then CBM resources have been quantified for Guardo-Barruelo basin accurately for every coal bed. After that, technical feasibility has been used to evaluate total amount of gas that can be recovered.

关键词： Coal CBM Methane Castilla y León

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Flexible Co-Combustion of High Ratios of Sustainable Biomass with Coal in Oxy-CFB Boiler for CO<sub>2</sub>Capture

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Journal of Power and Energy Engineering 2018年第11期6卷 12-22页

作者： Jose A. Gutiérrez bravo Raquel Garcia erasmo Cadena Department of Mining Engineering Universidad de León Campus de Vegazana León Spain

Coal-fired plants are under pressure to reduce their carbon-intensity. Available options include co-firing CO2-neutral biomass, oxy-fuel-combustion as part of a carbon capture process or a combination of both to give a “CO2-negative” power plant. BioCCS, the combination of CO2 Capture and Storage (CCS) with sustainable biomass conversion, is the only large-scale technology that can achieve net negative emissions. Combining, developing and demonstrating the oxy-combustion of high ratios of sustainable biomass with coal in flexible circulating fluidized bed (CFB) boiler will bring significant advances in the reduction of greenhouse gases (GHG) emissions. Areas addressed include possibilities for: biomass characterization;handling and feeding;co-firing ratios definition;CFB oxy-co-combustion studies;combustion performance;boiler flexibility in fuel and load;main emissions analysis;slaging, fouling and agglomeration;corrosion and erosion;and implications on plant operation and associated costs. The article will detail a comprehensive understanding on sustainable biomass supply, co-firing ratios and how direct biomass co-combustion under oxy-fuel conditions can be implemented. It seeks to push biomass co-combustion in future large-scale oxy-fuel CFB power stations to high thermal shares while enhancing the power plants’ operational flexibility, economic competitiveness and give operational procedures. There will be a need to consider the public acceptance of power production from coal and coal sustainability, by its combination with renewable sources of energy (biomass).

关键词： Carbon Capture Use and Storage (CCUS) Biomass Combustion Carbon Capture CFB Boiler

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