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Spontaneous Rupture of Urinary Bladder (SRUB): An Exceptional Presentation

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Open Journal of Urology 2023年第9期13卷 376-381页

作者： Coulibaly Noël yao evrard kouamé Adebayo Tawakaltu Bolasade Tuo Legnima Sekou Michel Yeo Donafologo Daouda Diomandé Vamoussa Service d’urologie CHU Treichville Abidjan C&#244te d’Ivoire Département de Chirurgie et Spécialités Chirurgicales Université Felix Houphou&#235t Boigny UFRSMA Cocody Abidjan C&#244te d’Ivoire

Background: Spontaneous rupture of urinary bladder (SRUB) without trauma is an extremely rare pathology. The incidence is estimated to about 1/126,000. It is difficult to diagnose. Aim: To present an exceptional case report and emphasize on the difficulty of diagnosis. Case Presentation: We report the case of a 63-year-old man. The initial diagnosis of SRUB was obscured by a urinary retention. The pelvic ultrasound finally led to the diagnosis. We will pay particular attention to the circumstances of the diagnosis and the therapeutic measures applied. Conclusion: SRUB is exceptional and misdiagnosis is usual. Management is most of the time surgical.

关键词： Bladder Rupture Spontaneous Rupture Treatment

Kidney Transplantation Using Ovarian Vein. Presentation of Two Cases and Review of Literature

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Open Journal of Organ Transplant Surgery 2022年第1期10卷 1-6页

作者： Coulibaly Noël yao evrard kouamé Adebayo Tawakaltu Bolasade Toure Dramane Hoang Anh Dung Ackoundou-N’guessan Clément Service d’urologie CHU Treichville Abidjan C&#244 te d’Ivoire Service de chirurgie générale et endocrinienne CHU Treichville Abidjan C&#244 te d’Ivoire Clinique de Transplantation Sous Diaphragmatique H&#244 pital Erasme ULB Bruxelles Belgique Service de Néphrologie CHU de Yopougon Abidjan C&#244 te d’Ivoire

A good vascular condition is fundamental for kidney transplantation. A bad arterial or venous supply may compromise graft survival. Discovery in operating theater of vascular anomalies not diagnosed by medical imaging may overwhelm operating protocol. Our cases emphasize the issue of pre operating evaluation. The cases are those of two women, aged 48 and 25 years, with chronic renal insufficiency, for whom living donor kidney transplantation was decided. During the process, a total obstruction of iliac vein was found and led to a change of technique. The dilated ovarian vein was used for the venous anastomosis while the arterial anastomosis was as usually made using the iliac artery. Post-surgical follow up was uneventful. These cases emphasize on the mandatory pre operative evaluation and the respect of guidelines in the process of kidney transplantation. They also open access to other operating strategies. The objective of this publication was to present our experience in dealing with an obstructed iliac vein and emphasize on the necessity to assess accurately vascular state in kidney transplantation.

关键词： Kidney Transplantation Vascular Anastomosis Venous Obstruction

Surgical Complications of Kidney Transplantation in a Resource Limited Country: Retrospective Study of the First Five Years

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Open Journal of Urology 2023年第9期13卷 371-375页

作者： Coulibaly Noël yao evrard kouamé Adebayo Tawakaltu Bolasade Tuo Legnima Sekou Michel Yeo Donafologo Daouda Dah Freddy Service d’urologie CHU Treichville Abidjan C&#244te d’Ivoire Département de Chirurgie et Spécialités Chirurgicales Université Felix Houphou&#235t Boigny UFRSMA Cocody Abidjan C&#244te d’Ivoire

Background: Kidney transplantation is the most efficient treatment for renal failure but may be ruined by complications. Objective: To report the surgical complications of renal transplantation and the therapeutic means applied. Method: It was a retrospective study including 42 files of kidney transplantation in Côte d’Ivoire. We report 11 cases of surgical complications of the recipient’s intervention during the first five years. Results: The mean age was 42.64 years (±15.04). In 90.9% of the cases, there was a comorbidity factor. Lymphocele and stenosis of the uretero vesical anastomosis were the most frequent complications. One death was observed. Conclusion: Kidney transplantation is an effective way of managing chronic renal failure. Postoperative complications are polymorphic and unpredictable.

关键词： Renal Transplantation Post Operative Complication Ureterovesical Stenosis Lymphocele

Impact of Vascular Variations on Living Donor Kidney Transplantation

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Open Journal of Organ Transplant Surgery 2024年第1期12卷 1-6页

作者： Noël Coulibaly evrard kouamé yao Vamoussa Diomandé Tawakaltu Bolasade Adebayo Légnima Sékou Michel Tuo Donafologo Daouda Yéo UFR Sciences Mdicales dAbidjan-Dpartement de Spcialits et Spcialits Chirurgicales Universit Flix Houphout Boigny Abidjan Cte dIvoire Service dUrologie CHU Treichville Abidjan Cte dIvoire

Background: Kidney transplantation is the best treatment for end-stage chronic kidney disease. However, its realization is confronted by several difficulties among which are anatomical variations. Objective: The objective of our work was to describe the impact of renal pedicle variations on the operative procedure as well as the complications. Method: We conducted a retrospective study on living kidney donors and their recipients in the period from 2012 to 2017. Several variables were studied, in particular socio-demographic, operative and progression. Results: We identified 49 living donors whose mean age was 37.59 years with a male-to-female ratio of 3.9 and 45 ± 10.75 years in the recipients. The prevalence of renal vascular abnormalities was higher with a proportion of 46.94% in recipients. The left kidney was most frequently removed (75.51%) and then kept mainly in HTK (95.92%). These vascular anomalies were associated with a longer operating time but this difference was not statistically significant (p = 0.5804). They had no effect on hot and cold ischemia times (p = 0.9838, p = 0.8389). Complications were observed in 11 patients, all recipients, i.e. 11.22%, and were not related to the presence of vascular abnormalities (p = 0.086). We observed that 4.08% of deaths were all recipients. Conclusion: It seems that kidney transplantation with multiple renal arteries and/or veins does not significantly lengthen the operating time and does not promote the onset of complications.

关键词： Vascular Abnormality Renal Transplantation Renal Pedicle

Surgical Site Infections in Trauma and Orthopaedics at Bouaké Teaching Hospital (Côte d’Ivoire)

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Open Journal of Orthopedics 2024年第9期14卷 381-390页

作者： Loukou Blaise yao Koffi Léopold Krah Aya Adelaïde Natacha Kouassi kouamé Innocent M’bra kouamé Jean-Eric Kouassi Michel Kodo Department of Trauma and Orthopaedics Bouak Teaching Hospital Bouak Cte dIvoire

Background: Surgical site infections are serious healthcare problems. The aim was to describe the epidemiological, diagnostic, therapeutic, and prognostic aspects of surgical site infections in Trauma and Orthopaedics at Bouaké Teaching Hospital. Method: This retrospective, descriptive, and analytical study was conducted from January 2019 to December 31, 2021. The data studied included prevalence, initial lesions, type of surgical intervention, type of SSI, bacteria involved, treatment, and outcomes. Results: Forty-four (11%) of the 399 patients included in the study developed a surgical site infection. The mean age was 27 years, with 36 male and 8 female. Initial lesions were predominantly open fractures (n = 31;70%), with a mean delay of 48 hours for surgical management. Emergency interventions accounted for 70% (n = 31) of cases. The NNISS infection risk score was 1 in 80% (n = 35) of cases. Superficial infections (n = 34;77%) appeared early, on a mean 6 days postoperatively. Bacteriological analysis primarily identified Pseudomonas aeruginosa (n = 10;23%), sensitive to Imipenem and Chloramphenicol but resistant to Amoxicillin-clavulanic acid, Ceftriaxone, Gentamicin, and Ciprofloxacin. Multidrug-resistant bacteria were found in 89% (n = 8) of cases, with all bacteria resistant to Ceftriaxone. Surgical revision was performed in 10 patients (23%), primarily involving debridement with hardware retention (n = 7;70%). Chloramphenicol was the most commonly used antibiotic post-antibiogram (61%). Outcomes were favourable in 98% of cases. Identified risk factors included the type of lesion according to NRC classification, the delay in managing open fractures, and the NNISS score. Conclusion: The prevalence of surgical site infection was 11%, favoured by the delayed operation of open fractures.

关键词： Surgical Site Infection Open Fractures Pseudomonas aeruginosa Ceftriaxone

Reinforcement learning based adaptive control for uncertain mechanical systems with asymptotic tracking

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Defence Technology（防务技术） 2024年第4期34卷 19-28页

作者： Xiang-long Liang Zhi-kai yao yao-wen Ge Jian-yong yao School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing210094China College of Automation&College of Artificial Intelligence Nanjing University of Post and TelecommunicationNanjing210023China

This paper mainly focuses on the development of a learning-based controller for a class of uncertain mechanical systems modeled by the Euler-Lagrange *** considered system can depict the behavior of a large class of engineering systems,such as vehicular systems,robot manipulators and *** these systems are often characterized by highly nonlinear characteristics,heavy modeling uncertainties and unknown perturbations,therefore,accurate-model-based nonlinear control approaches become *** by the challenge,a reinforcement learning(RL)adaptive control methodology based on the actor-critic framework is investigated to compensate the uncertain mechanical *** approximation inaccuracies caused by RL and the exogenous unknown disturbances are circumvented via a continuous robust integral of the sign of the error(RISE)control *** from a classical RISE control law,a tanh(·)function is utilized instead of a sign(·)function to acquire a more smooth control *** developed controller requires very little prior knowledge of the dynamic model,is robust to unknown dynamics and exogenous disturbances,and can achieve asymptotic output ***,co-simulations through ADAMS and MATLAB/Simulink on a three degrees-of-freedom(3-DOF)manipulator and experiments on a real-time electromechanical servo system are performed to verify the performance of the proposed approach.

关键词： Adaptive control Reinforcement learning Uncertain mechanical systems Asymptotic tracking

Fresh-Keeping Decision and Coordination of Fresh Agricultural Product Supply Chain Considering Carbon Cap-and-Trade under Different Dominance

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Journal of Systems Science and Systems Engineering 2024年第1期33卷 30-51页

作者： Yang Yang Guanxin yao China Institute for Agricultural Equipment Industrial Development Jiangsu UniversityZhenjiang212013China Jiangsu Modern Logistics Research Base Yangzhou UniversityYangzhou225009China

In the context of low carbon,this paper discussed the impact of the carbon cap-and-trade policy on the fresh-keeping decision-making of two-echelon fresh agricultural product supply chains under different dominance,and designed cost-sharing contracts to coordinate the supply chain of fresh agricultural products dominated by suppliers and retailers *** results showed that:dominance has no effect on the fresh-keeping decision and total revenue of fresh agricultural product supply chain,but it affects the internal income distribution,and dominance does not always bring more benefits;the implementation of carbon cap-and-trade reduces the fresh-keeping decision-making of fresh agricultural products supply chain and reduces the free-rider income of followers;the role of higher carbon trading price is twofold,which not only brings about the speculation of leading enterprises,but also promotes the application of low-carbon technologies;consumers’high preference for freshness,low-cost and high-efficiency low-carbon technology are all conducive to improving the fresh-keeping efforts and benefits of the supply chain;cost-sharing contracts can coordinate the supply chain of fresh agricultural products.

关键词： Dominant power carbon cap-and-trade policy fresh agricultural product supply chain fresh-keeping decision-making

Numerical investigation of non-uniform temperature fields for proppant and fluid phases in supercritical CO_(2)fracturing

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Particuology 2024年第7期90卷 149-163页

作者： Boyu Liu Jun yao Research Center of Multiphase Flow in Porous Media China University of Petroleum(East China)Qingdao 266000China

The non-uniform temperature distribution in supercritical CO_(2)(Sc-CO_(2))fracturing influences the density,viscosity,and volume expansion or shrinkage rate of Sc-CO_(2),impacting proppant *** study presents a coupled computational fluid dynamics-discrete element method and heat transfer model to examine the effects of proppant bed shape and the heat transfers of proppant-wall,proppant-fluid,and fluid-wall on the fluid and proppant temperature *** Sc-CO_(2)volume expansion is assessed under various temperature conditions by evaluating the volume-averaged Sc-CO_(2)*** factors,including proppant size,shape,thermal conductivity,concentration,temperature difference,and injection velocity,are carefully analyzed to elucidate their *** findings elucidate the existence of four distinct zones in the fluid temperature *** zone exhibits different magnitudes of temperature change under diverse conditions and undergoes dynamic transformations with the development of the proppant *** fluid-wall heat transfer and the fluid temperatures in Zones C and D are significantly subject to the fluid injection velocity(governing the heating duration),the temperature difference between fluid and formation(impacting the magnitude of heat flux),and the proppant bed shape(controlling the effective heating area).Additionally,the proppant-wall and proppant-fluid heat transfers determine the temperatures of both the proppant bed and the fluid within Zone B,showing a strong correlation with proppant thermal conductivity,proppant size,injection velocity,and temperature *** proposed coupled model provides valuable insights into the temperature distributions and flow behaviors of temperature-dependent fracturing fluids and proppants.

关键词： CFD-DEM Heat transfer Compressible fluid CO_(2)sequestration Proppant transport

Limits of Uneven Battery Power in Modular Multilevel Converter-based Battery Energy Storage Systems

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CSEE Journal of Power and Energy Systems 2024年第2期10卷 686-695页

作者： yao Pan Xiaofeng Sun Wei Zhao Xin Li yao Cai Institute of Electrical Engineering Yanshan UniversityQinhuangdao 066004China

For modular multilevel converter-based battery energy storage systems (MMC-BESS), uneven power among batteries of SMs will be deduced by battery aging, battery fault, etc., which will degrade performance and even lead to system failure. For maintaining the balance of capacitor voltage, this paper analyzes the limits of the uneven power of batteries, which are presented as the current limits in this paper. According to analysis, an analytical method is proposed that only the dc and fundamental frequency components of the arm current are used to calculate current limits. With the current limits it is able to evaluate the reasonability of power distribution among batteries. Meanwhile, increase of fundamental frequency component will enhance the current limits, and the dc component determines the size relationship between the absolute values of the upper and lower current limits. Finally, simulation model and experiment prototype are built for verifying the theoretical analysis and current limits calculation method, and satisfactory results are provided.

关键词： Arm current balance of capacitor voltage current limits MMC-BESS uneven power