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Are There Prognostic Factors for Failure of Surgical Treatment of Post-Traumatic Posterior Ureteral Stenosis? About 30 Cases and Review of the Literature

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Open Journal of Urology 2022年第10期12卷 539-548页

作者： Dimitri Mbethe Mohammed Said Moudouni adrien mougougou Steevy Ndang Ngou Milama Izoudine Bissiriou Bilal Smith Olagui Jean Massandé Mouyendi Urology Department the University Hospital of Libreville Libreville Gabon Urology Department the Mohamed 6 University Hospital of Marrakech Marrakech Marocco Urological and Visceral Surgery Department Hospital of Instruction of the Armies Omar Bongo Ondimba Libreville Gabon

Introduction: The management of post-traumatic stenosis of the posterior urethra is divided between early endoscopic realignment and delayed surgery. In the latter case, several techniques are used taking into account several factors. Our objective was therefore to investigate the possible prognostic factors of failure of this surgical management. Material and Methods: We conducted a retrospective study from January 2006 to December 2017 on patients admitted to the Urology Department of the Mohammed 6 University Hospital of Marrakech for management of post-traumatic posterior urethral stenosis. The parameters studied were age, medical and surgical history, causes, characteristics of the stenosis (location, number, length), associated lesions, surgical technique used, and evolution. The descriptive analysis consisted of calculation of absolute and relative frequencies for the qualitative variables, and of position and dispersion parameters for the quantitative variables (mean, standard deviation). In bivariate analysis, the comparison of categorical variables used Pearson’s Chi-square statistical test and Fisher’s test if necessary. The significance threshold was set at p Results: A total of 30 cases were selected. The age of our patients varied between 18 and 68 years, with an average of 38.33 years (16 - 80 years);the most affected age group was between 20 and 39 years. The mode of revelation of urethral damage was dominated by acute retention of urine present in 76% of patients, followed by dysuria (33%). The stenosis extended over 21.91 mm on average (14 - 40 mm). It was accompanied by bone involvement in 15 patients (53.3%). Erectile dysfunction was present in 23 patients (23%). Terminal urethrogram was the main surgical technique used, followed by internal urethrotomy (60% and 30% respectively). 15 patients had a recurrence, with an average of 1-second operation. Statistical analysis of the different factors studied showed no correlation with the occurrence of

关键词： Posterior Urethra Stenosis Urethrogram Endoscopic Realignment

Sexual Functional Prognosis of Penile Emergencies at the University Hospital of Libreville

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Open Journal of Urology 2022年第10期12卷 527-538页

作者： adrien mougougou Steevy Ndang Ngou Milama Smith Giscard Olagui Dimitri Mbethe Grace Cherile Ongouta Alice Armande Boutsomba Moukinda Jean Massandé Mouyendi Urology Department UHC of Libreville Libreville Gabon Department of Surgery and Surgical Specialties University of Health Sciences Owendo Gabon Department of General and Urological Surgery Omar Bongo Ondimba Army Training Hospital Libreville Gabon

Introduction: Penile emergencies are multiple and varied, and they can jeopardize the sexual functional prognosis of the patient. The objective of our study was to evaluate the sexual functional prognosis of patients admitted for penile emergencies. Patients and Methods: We conducted a cross-sectional study from January 1 to 31, 2021, in the urology department of the University Hospital. Variables included sociodemographic, diagnostic, and evolutionary data of sexually active patients admitted for a penile emergency. Results: During this period, 68 patients were admitted for penile emergencies. We included 45 sexually active patients, with a mean age ranging from 34.5 ± 14.1 years with extremes of 16 and 90 years. The most frequent penile emergencies were priapism (62.2%) and penile fracture (22.2%), with a mean time for treatment of 21.4 ± 52.5 hours. The sexual functional prognosis was very satisfactory (normal erection) in 71.1% (n = 32) of patients. Loss of erectile function was observed in 4.4% (n = 2) of cases. Conclusion: Penile emergencies are relatively frequent, dominated by priapism and penile fracture in our context. The sexual functional prognosis is good.

关键词： Penile Emergency Diagnosis Sexual Functional Prognosis Libreville

Acute Priapism: A Revealing Inaugural Mode of Chronic Myeloid Leukemia. A Case Report and Review of the Literature

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Open Journal of Urology 2022年第5期12卷 237-241页

作者： Dimitri Mbethe adrien mougougou Steevy Ndang Ngou Milama Said Mohamed Moudouni Izoudine Bissiriou Giscard Smith Olagui Jean Massandé Mouyendi Urology Department of the University Hospital of Libreville Libreville Gabon Urology Department of the Mohamed 6 University Hospital of Marrakech Marrakesh Morocco Urological and Visceral Surgery Department Omar Bongo Ondimba Armed Forces Instruction Hospital Libreville Gabon

Priapism is a painful and prolonged erection occurring without any sexual stimulation and not resulting in ejaculation. It most often occurs in patients with sickle cell disease. We report here the case of acute recurrent priapism revealing inaugural mode of CML in a 22-year-old patient with no particular pathological history. The study of the onco-hematological karyotype revealed a karyotype with 46 chromosomes with a clonal chromosomal anomaly: The t (9;22) “Philadelphia chromosome”. The evolution was favorable under imatinib.

关键词： Priapism Chronic Myeloid Leukaemia Philadelphia Chromosome

Bidirectional energy-controlled piezoelectric shunt damping technology and its vibration attenuation performance

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International Journal of Mechanical System Dynamics 2024年第1期4卷 63-76页

作者： Yipeng Wu Quan Yuan Kaibin Ren Xin Shen Hui Shen adrien Badel Hongli Ji Jinhao Qiu State Key Laboratory of Mechanics and Control for Aerospace Structures Nanjing University of Aeronautics and AstronauticsNanjingChina College of Mechanical and Electrical Engineering Qingdao UniversityQingdaoChina SYMME Laboratory Universite Savoie Mont BlancAnnecy le VieuxFrance

Piezoelectric material-based semi-active vibration control systems may effectively suppress vibration amplitude without any external power supply,or even harvest electrical *** bidirectional electrical energy control phenomenon is theoretically introduced and validated in this paper.A flyback transformer-based switching piezoelectric shunt circuit that can extract energy from or inject energy into piezoelectric elements is *** analytical expressions of the controlled energy and the corresponding vibration attenuation are therefore derived for a classical electromechanical cantilever *** predictions validated by the experimental results show that the structure vibration attenuation can be tuned from−5 to−25 dB under the given electrical quality factor of the circuit and figure of merit of the electromechanical structure,and the consumed power is in the range of−13 to 25 mW,which is a good theoretical basis for the development of self-sensing,self-adapting,and self-powered piezoelectric vibration control systems.

关键词： vibration control piezoelectric shunt damping electromechanical energy

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具有半子模式欧拉拓扑绝缘体的声学观测

Science Bulletin 2024年第11期69卷 1653-1659页

作者：姜斌 adrien Bouhon 吴世巧孔泽霖林志康 Robert-Jan Slager 蒋建华 Suzhou Institute for Advanced Research University of Science and Technology of ChinaSuzhou 215123China School of Physical Science and Technology&Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow UniversitySuzhou 215006China TCM Group Cavendish LaboratoryUniversity of CambridgeCambridge CB30HEUK NORDITA Stockholm University and KTH Royal Institute of TechnologyStockholm SE-10691Sweden

Topological band theory has conventionally been concerned with the topology of bands around a single gap. Only recently non-Abelian topologies that thrive on involving multiple gaps were studied, unveiling a new horizon in topological physics beyond the conventional paradigm. Here, we report on the first experimental realization of a topological Euler insulator phase with unique meronic characterization in an acoustic metamaterial. We demonstrate that this topological phase has several nontrivial features:First, the system cannot be described by conventional topological band theory, but has a nontrivial Euler class that captures the unconventional geometry of the Bloch bands in the Brillouin ***, we uncover in theory and probe in experiments a meronic configuration of the bulk Bloch states for the first time. Third, using a detailed symmetry analysis, we show that the topological Euler insulator evolves from a non-Abelian topological semimetal phase via. the annihilation of Dirac points in pairs in one of the band gaps. With these nontrivial properties, we establish concretely an unconventional bulk-edge correspondence which is confirmed by directly measuring the edge states via. pump-probe techniques. Our work thus unveils a nontrivial topological Euler insulator phase with a unique meronic pattern and paves the way as a platform for non-Abelian topological phenomena.

关键词： Euler insulators Meronic waves Acoustic metamaterials Topological phases of matter

Prostatic Burkitt Lymphoma, a Rare Secondary Location

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Are There Prognostic Factors for Failure of Surgical Treatment of Post-Traumatic Posterior Ureteral Stenosis? About 30 Cases and Review of the Literature

Open Journal of Urology（泌尿学期刊） 2021年第6期

作者： adrien mougougou Steevy Ndang Ngou Milama Smith Giscard Olagui Jean Massandé Mouyendi

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Sexual Functional Prognosis of Penile Emergencies at the University Hospital of Libreville

Open Journal of Urology（泌尿学期刊） 2022年第10期

作者： dimitri mbethe mohammed said moudouni adrien mougougou steevy ndang ngou milama izoudine bissiriou bilal smith olagui jean massandé mouyendi

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Modeling strain rate sensitivity and high temperature deformation of Mg-3Al-lZn alloy

Open Journal of Urology（泌尿学期刊） 2022年第10期

作者： adrien mougougou steevy ndang ngou milama smith giscard olagui dimitri mbethe grace cherile ongouta alice armande boutsomba moukinda jean massandé mouyendi

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Journal of Magnesium and Alloys 2019年第3期7卷 433-443页

作者： adrien Chapuis Qing Liu College of Materials Science and Engineering Chongqing UniversityChongqing 400044China

Increasing the plastic deformation temperature of Mg alloys results in higher strain rate sensitivity,easier activation of secondary slip modes,and impeded *** this study,the strain rate sensitivity is estimated for each deformation mode,and visco-plastic self-consistent modeling is used to reproduce the plastic deformation behavior of an Mg-3Al-lZn O-temper plate from 150 to 450℃.Twinning and basal slip have relatively low strain rate sensitivity,whereas secondary slip modes are highly strain rate sensitive at high *** texture evolution and plastic anisotropy are modeled at different temperatures and strain *** show that when the strain rate sensitivity is taken into account,compared with rate independent critical resolved shear stresses,the material parameters and predictions are *** particular,this study shows that,for hot deformation,there is a critical strain rate above which secondary slip modes predominate,and beyond which tension twinning is activated.A similar transition is expected for modes that have different strain rate sensitivity.

关键词： Magnesium alloy AZ31 Crystal plasticity VPSC Visco-plastic